use std::fmt;
use std::future::Future;
use std::path::PathBuf;
use std::pin::Pin;
use std::sync::Arc;

use codex_api::ApiError;
use codex_api::Provider;
use codex_api::SharedAuthProvider;
use codex_api::TransportError;
use codex_api::is_azure_responses_provider;
use codex_login::AuthManager;
use codex_login::CodexAuth;
use codex_login::default_client::RESIDENCY_HEADER_NAME;
use codex_login::default_client::ResidencyRequirement;
use codex_login::default_client::read_default_client_residency_requirement;
use codex_model_provider_info::ModelProviderInfo;
use codex_models_manager::cache::ModelsCache;
use codex_models_manager::manager::OpenAiModelsManager;
use codex_models_manager::manager::SharedModelsManager;
use codex_models_manager::manager::StaticModelsManager;
use codex_protocol::account::ProviderAccount;
use codex_protocol::error::CodexErr;
use codex_protocol::openai_models::ModelsResponse;
use http::HeaderValue;

use crate::amazon_bedrock::AmazonBedrockModelProvider;
use crate::auth::ProviderAuthScope;
use crate::auth::ResolvedProviderAuth;
use crate::auth::auth_manager_for_provider;
use crate::auth::resolve_provider_auth;
use crate::auth::resolve_provider_auth_for_scope;
use crate::models_endpoint::OpenAiModelsEndpoint;

pub(crate) fn enforce_managed_residency(provider: &mut Provider) {
    if let Some(requirement) = read_default_client_residency_requirement() {
        let value = match requirement {
            ResidencyRequirement::Us => HeaderValue::from_static("us"),
        };
        provider.headers.insert(RESIDENCY_HEADER_NAME, value);
    }
}

/// Remote context-compaction protocols supported by a model provider.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum RemoteCompactionSupport {
    /// The provider does not support remote compaction.
    Unsupported,
    /// The provider supports `compaction_trigger` items over the Responses endpoint.
    V2,
}

/// Optional provider-backed features that Codex may expose at runtime.
///
/// These capabilities are a provider-owned upper bound. Callers can disable
/// more functionality through normal config, but should not expose a feature
/// that the active provider marks unsupported here.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct ProviderCapabilities {
    pub namespace_tools: bool,
    pub image_generation: bool,
    pub web_search: bool,
    pub external_web_access: bool,
    pub remote_compaction: RemoteCompactionSupport,
}

impl Default for ProviderCapabilities {
    fn default() -> Self {
        Self {
            namespace_tools: true,
            image_generation: true,
            web_search: true,
            external_web_access: true,
            remote_compaction: RemoteCompactionSupport::Unsupported,
        }
    }
}

/// Current app-visible account state for a model provider.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ProviderAccountState {
    pub account: Option<ProviderAccount>,
    pub requires_openai_auth: bool,
}

/// Outcome of a provider-owned attempt to recover from an authentication failure.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ProviderUnauthorizedRecovery {
    /// The provider has no provider-specific authentication recovery configured.
    NotConfigured,
    /// The provider recovered its authentication state and the request can be retried.
    Recovered,
}

/// User-facing lifecycle messages for provider-owned authentication recovery.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct ProviderAuthRecoveryMessages {
    pub started: &'static str,
    pub succeeded: &'static str,
}

/// Error returned when a provider cannot construct its app-visible account state.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ProviderAccountError {
    MissingChatgptAccountDetails,
    UnsupportedBedrockApiKeyAuth,
}

impl fmt::Display for ProviderAccountError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::MissingChatgptAccountDetails => {
                write!(f, "plan type is required for chatgpt authentication")
            }
            Self::UnsupportedBedrockApiKeyAuth => {
                write!(
                    f,
                    "Bedrock API key auth is only supported by the Amazon Bedrock model provider"
                )
            }
        }
    }
}

impl std::error::Error for ProviderAccountError {}

pub type ProviderAccountResult = std::result::Result<ProviderAccountState, ProviderAccountError>;

/// Default model used for automatic approval review when a provider does not
/// require a backend-specific model ID.
pub const DEFAULT_APPROVAL_REVIEW_PREFERRED_MODEL: &str = "codex-auto-review";

const API_KEY_APPROVAL_REVIEW_PREFERRED_MODEL: &str = "gpt-5.6-luna";

/// Default model used for memory extraction when a provider does not require a
/// backend-specific model ID.
pub const DEFAULT_MEMORY_EXTRACTION_PREFERRED_MODEL: &str = "gpt-5.6-luna";

/// Default model used for memory consolidation when a provider does not require
/// a backend-specific model ID.
pub const DEFAULT_MEMORY_CONSOLIDATION_PREFERRED_MODEL: &str = "gpt-5.6-terra";

/// Runtime provider abstraction used by model execution.
///
/// Implementations own provider-specific behavior for a model backend. The
/// `ModelProviderInfo` returned by `info` is the serialized/configured provider
/// metadata used by the default OpenAI-compatible implementation.
pub trait ModelProvider: fmt::Debug + Send + Sync {
    /// Returns the configured provider metadata.
    fn info(&self) -> &ModelProviderInfo;

    /// Returns the provider-owned capability upper bounds.
    fn capabilities(&self) -> ProviderCapabilities {
        ProviderCapabilities::default()
    }

    /// Returns the preferred model used for automatic approval review.
    ///
    /// Providers that require backend-specific model IDs should override this.
    fn approval_review_preferred_model(&self) -> &'static str {
        DEFAULT_APPROVAL_REVIEW_PREFERRED_MODEL
    }

    /// Returns the preferred model used for memory extraction.
    ///
    /// Providers that require backend-specific model IDs should override this.
    fn memory_extraction_preferred_model(&self) -> &'static str {
        DEFAULT_MEMORY_EXTRACTION_PREFERRED_MODEL
    }

    /// Returns the preferred model used for memory consolidation.
    ///
    /// Providers that require backend-specific model IDs should override this.
    fn memory_consolidation_preferred_model(&self) -> &'static str {
        DEFAULT_MEMORY_CONSOLIDATION_PREFERRED_MODEL
    }

    /// Returns whether requests made through this provider should include attestation.
    fn supports_attestation(&self) -> bool {
        false
    }

    /// Returns the provider-scoped auth manager, when this provider uses one.
    ///
    /// TODO(celia-oai): Make auth manager access internal to this crate so callers
    /// resolve provider-specific auth only through `ModelProvider`. We first need
    /// to think through whether Codex should have a unified provider-specific auth
    /// manager throughout the codebase; that is a larger refactor than this change.
    fn auth_manager(&self) -> Option<Arc<AuthManager>>;

    /// Returns whether this transport failure can be recovered by provider-scoped authentication.
    ///
    /// The default preserves existing unauthorized-response handling. Providers with other
    /// authentication failure shapes may recognize additional response or request-signing errors.
    fn is_recoverable_auth_error(&self, error: &TransportError) -> bool {
        matches!(
            error,
            TransportError::Http { status, .. } if *status == http::StatusCode::UNAUTHORIZED
        )
    }

    /// Returns lifecycle messages when provider-owned authentication recovery is active.
    fn auth_recovery_messages(&self) -> Option<ProviderAuthRecoveryMessages> {
        None
    }

    /// Attempts provider-owned authentication recovery before using the auth manager.
    fn recover_from_unauthorized(
        &self,
    ) -> ModelProviderFuture<'_, codex_protocol::error::Result<ProviderUnauthorizedRecovery>> {
        Box::pin(async { Ok(ProviderUnauthorizedRecovery::NotConfigured) })
    }

    /// Returns the current provider-scoped auth value, if one is configured.
    fn auth(&self) -> ModelProviderFuture<'_, Option<CodexAuth>>;

    /// Returns the current app-visible account state for this provider.
    fn account_state(&self) -> ProviderAccountResult;

    /// Maps an API client error into the provider's user-facing error representation.
    fn map_api_error(&self, error: ApiError) -> CodexErr {
        codex_api::map_api_error(error)
    }

    /// Returns provider configuration adapted for the API client.
    fn api_provider(&self) -> ModelProviderFuture<'_, codex_protocol::error::Result<Provider>> {
        Box::pin(async move {
            let auth = self.auth().await;
            let mut provider = self
                .info()
                .to_api_provider(auth.as_ref().map(CodexAuth::auth_mode))?;
            enforce_managed_residency(&mut provider);
            Ok(provider)
        })
    }

    /// Returns the provider base URL that will be used at request time.
    fn runtime_base_url(
        &self,
    ) -> ModelProviderFuture<'_, codex_protocol::error::Result<Option<String>>> {
        Box::pin(async { Ok(self.info().base_url.clone()) })
    }

    /// Returns the auth provider used to attach request credentials.
    fn api_auth(
        &self,
    ) -> ModelProviderFuture<'_, codex_protocol::error::Result<SharedAuthProvider>> {
        Box::pin(async move {
            let auth = self.auth().await;
            resolve_provider_auth(auth.as_ref(), self.info())
        })
    }

    /// Returns request credentials, optionally scoped to a Codex session task.
    fn api_auth_for_scope(
        &self,
        scope: ProviderAuthScope,
    ) -> ModelProviderFuture<'_, codex_protocol::error::Result<ResolvedProviderAuth>> {
        Box::pin(async move {
            if !provider_uses_first_party_auth_path(self.info()) {
                return self.api_auth().await.map(ResolvedProviderAuth::new);
            }
            let auth = self.auth().await;
            resolve_provider_auth_for_scope(self.auth_manager(), auth.as_ref(), self.info(), scope)
                .await
        })
    }

    /// Creates the model manager implementation appropriate for this provider.
    fn models_manager(
        &self,
        codex_home: PathBuf,
        config_model_catalog: Option<ModelsResponse>,
    ) -> SharedModelsManager;

    /// Creates a model manager with caching disabled.
    ///
    /// Providers that fetch model catalogs should override this method. The default uses an
    /// authoritative in-memory catalog so hosted callers cannot accidentally write to disk.
    fn models_manager_without_cache(
        &self,
        config_model_catalog: Option<ModelsResponse>,
    ) -> SharedModelsManager {
        let model_catalog = config_model_catalog
            .or_else(|| codex_models_manager::bundled_models_response().ok())
            .unwrap_or_default();
        Arc::new(StaticModelsManager::new(self.auth_manager(), model_catalog))
    }

    /// Creates a model manager that can use a caller-provided cache for remote catalogs.
    ///
    /// Providers with remote catalogs should override this method. The default preserves the
    /// authoritative catalog returned by [`ModelProvider::models_manager_without_cache`] and does
    /// not consult `cache`. Implementations should likewise ignore the cache when
    /// `config_model_catalog` supplies an authoritative static catalog.
    fn models_manager_with_cache(
        &self,
        config_model_catalog: Option<ModelsResponse>,
        cache: Arc<dyn ModelsCache>,
    ) -> SharedModelsManager {
        drop(cache);
        self.models_manager_without_cache(config_model_catalog)
    }
}

pub type ModelProviderFuture<'a, T> = Pin<Box<dyn Future<Output = T> + Send + 'a>>;

/// Shared runtime model provider handle.
pub type SharedModelProvider = Arc<dyn ModelProvider>;

fn provider_uses_first_party_auth_path(provider: &ModelProviderInfo) -> bool {
    provider.requires_openai_auth
        && provider.env_key.is_none()
        && provider.experimental_bearer_token.is_none()
        && provider.auth.is_none()
        && provider.aws.is_none()
}

/// Creates the default runtime model provider for configured provider metadata.
pub fn create_model_provider(
    provider_info: ModelProviderInfo,
    auth_manager: Option<Arc<AuthManager>>,
) -> SharedModelProvider {
    if provider_info.is_amazon_bedrock() {
        Arc::new(AmazonBedrockModelProvider::new(provider_info, auth_manager))
    } else {
        Arc::new(ConfiguredModelProvider::new(provider_info, auth_manager))
    }
}

/// Runtime model provider backed by configured `ModelProviderInfo`.
#[derive(Clone, Debug)]
struct ConfiguredModelProvider {
    info: ModelProviderInfo,
    auth_manager: Option<Arc<AuthManager>>,
}

impl ConfiguredModelProvider {
    fn new(provider_info: ModelProviderInfo, auth_manager: Option<Arc<AuthManager>>) -> Self {
        let auth_manager = auth_manager_for_provider(auth_manager, &provider_info);
        Self {
            info: provider_info,
            auth_manager,
        }
    }
}

impl ModelProvider for ConfiguredModelProvider {
    fn info(&self) -> &ModelProviderInfo {
        &self.info
    }

    fn capabilities(&self) -> ProviderCapabilities {
        let remote_compaction = if self.info.is_openai()
            || is_azure_responses_provider(&self.info.name, self.info.base_url.as_deref())
        {
            RemoteCompactionSupport::V2
        } else {
            RemoteCompactionSupport::Unsupported
        };

        ProviderCapabilities {
            remote_compaction,
            ..ProviderCapabilities::default()
        }
    }

    fn approval_review_preferred_model(&self) -> &'static str {
        if self
            .auth_manager
            .as_ref()
            .and_then(|auth_manager| auth_manager.auth_cached())
            .is_some_and(|auth| auth.is_api_key_auth())
        {
            API_KEY_APPROVAL_REVIEW_PREFERRED_MODEL
        } else {
            DEFAULT_APPROVAL_REVIEW_PREFERRED_MODEL
        }
    }

    fn auth_manager(&self) -> Option<Arc<AuthManager>> {
        self.auth_manager.clone()
    }

    fn supports_attestation(&self) -> bool {
        self.auth_manager
            .as_ref()
            .and_then(|auth_manager| auth_manager.auth_cached())
            .is_some_and(|auth| auth.is_chatgpt_auth())
    }

    fn auth(&self) -> ModelProviderFuture<'_, Option<CodexAuth>> {
        Box::pin(async move {
            match self.auth_manager.as_ref() {
                Some(auth_manager) => auth_manager.auth().await,
                None => None,
            }
        })
    }

    fn account_state(&self) -> ProviderAccountResult {
        let account = if self.info.requires_openai_auth {
            self.auth_manager
                .as_ref()
                .and_then(|auth_manager| {
                    let auth = auth_manager.auth_cached()?;
                    if auth_manager.refresh_failure_for_auth(&auth).is_some() {
                        return None;
                    }
                    if matches!(auth, CodexAuth::Headers(_)) {
                        return None;
                    }
                    Some(auth)
                })
                .map(|auth| match &auth {
                    CodexAuth::ApiKey(_) => Ok(ProviderAccount::ApiKey),
                    CodexAuth::BedrockApiKey(_) | CodexAuth::BedrockAccessKeys(_) => {
                        Err(ProviderAccountError::UnsupportedBedrockApiKeyAuth)
                    }
                    CodexAuth::Chatgpt(_)
                    | CodexAuth::ChatgptAuthTokens(_)
                    | CodexAuth::Headers(_)
                    | CodexAuth::AgentIdentity(_)
                    | CodexAuth::PersonalAccessToken(_) => {
                        let email = auth.get_account_email();
                        let plan_type = auth.account_plan_type();

                        plan_type
                            .map(|plan_type| ProviderAccount::Chatgpt { email, plan_type })
                            .ok_or(ProviderAccountError::MissingChatgptAccountDetails)
                    }
                })
                .transpose()?
        } else {
            None
        };

        Ok(ProviderAccountState {
            account,
            requires_openai_auth: self.info.requires_openai_auth,
        })
    }

    fn models_manager(
        &self,
        codex_home: PathBuf,
        config_model_catalog: Option<ModelsResponse>,
    ) -> SharedModelsManager {
        match config_model_catalog {
            Some(model_catalog) => Arc::new(StaticModelsManager::new(
                self.auth_manager.clone(),
                model_catalog,
            )),
            None => {
                let endpoint = Arc::new(OpenAiModelsEndpoint::new(
                    self.info.clone(),
                    self.auth_manager.clone(),
                ));
                Arc::new(OpenAiModelsManager::new(
                    codex_home,
                    endpoint,
                    self.auth_manager.clone(),
                ))
            }
        }
    }

    fn models_manager_without_cache(
        &self,
        config_model_catalog: Option<ModelsResponse>,
    ) -> SharedModelsManager {
        match config_model_catalog {
            Some(model_catalog) => Arc::new(StaticModelsManager::new(
                self.auth_manager.clone(),
                model_catalog,
            )),
            None => {
                let endpoint = Arc::new(OpenAiModelsEndpoint::new(
                    self.info.clone(),
                    self.auth_manager.clone(),
                ));
                Arc::new(OpenAiModelsManager::new_without_cache(
                    endpoint,
                    self.auth_manager.clone(),
                ))
            }
        }
    }

    fn models_manager_with_cache(
        &self,
        config_model_catalog: Option<ModelsResponse>,
        cache: Arc<dyn ModelsCache>,
    ) -> SharedModelsManager {
        match config_model_catalog {
            Some(model_catalog) => Arc::new(StaticModelsManager::new(
                self.auth_manager.clone(),
                model_catalog,
            )),
            None => {
                let endpoint = Arc::new(OpenAiModelsEndpoint::new(
                    self.info.clone(),
                    self.auth_manager.clone(),
                ));
                Arc::new(OpenAiModelsManager::new_with_cache(
                    cache,
                    endpoint,
                    self.auth_manager.clone(),
                ))
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use std::num::NonZeroU64;

    use codex_http_client::HttpClientFactory;
    use codex_http_client::OutboundProxyPolicy;
    use codex_login::auth::AgentIdentityAuthPolicy;
    use codex_login::auth::BedrockApiKeyAuth;
    use codex_model_provider_info::AwsAuthRefreshConfig;
    use codex_model_provider_info::ModelProviderAwsAuthInfo;
    use codex_model_provider_info::WireApi;
    use codex_model_provider_info::create_oss_provider_with_base_url;
    use codex_models_manager::ModelsManagerConfig;
    use codex_models_manager::manager::RefreshStrategy;
    use codex_protocol::account::PlanType;
    use codex_protocol::config_types::ModelProviderAuthInfo;
    use codex_protocol::openai_models::ModelInfo;
    use codex_protocol::openai_models::ModelsResponse;
    use codex_protocol::protocol::SessionSource;
    use codex_utils_redacted_string::RedactedString;
    use pretty_assertions::assert_eq;
    use serde_json::json;
    use wiremock::Mock;
    use wiremock::MockServer;
    use wiremock::ResponseTemplate;
    use wiremock::matchers::header_regex;
    use wiremock::matchers::method;
    use wiremock::matchers::path;

    use super::*;
    use crate::auth::AgentIdentitySessionFallback;
    use crate::shared_state::process_shared_state;

    fn provider_info_with_command_auth() -> ModelProviderInfo {
        ModelProviderInfo {
            auth: Some(ModelProviderAuthInfo {
                command: "print-token".to_string(),
                args: Vec::new(),
                timeout_ms: NonZeroU64::new(5_000).expect("timeout should be non-zero"),
                refresh_interval_ms: 300_000,
                cwd: std::env::current_dir()
                    .expect("current dir should be available")
                    .try_into()
                    .expect("current dir should be absolute"),
            }),
            requires_openai_auth: false,
            ..ModelProviderInfo::create_openai_provider(/*base_url*/ None)
        }
    }

    fn test_codex_home() -> std::path::PathBuf {
        std::env::temp_dir().join(format!("codex-model-provider-test-{}", std::process::id()))
    }

    fn provider_for(base_url: String) -> ModelProviderInfo {
        ModelProviderInfo {
            name: "mock".into(),
            base_url: Some(base_url),
            env_key: None,
            env_key_instructions: None,
            experimental_bearer_token: None,
            auth: None,
            aws: None,
            wire_api: WireApi::Responses,
            query_params: None,
            http_headers: None,
            env_http_headers: None,
            request_max_retries: Some(0),
            stream_max_retries: Some(0),
            stream_idle_timeout_ms: Some(5_000),
            websocket_connect_timeout_ms: None,
            requires_openai_auth: false,
            supports_websockets: false,
            supports_standalone_web_search: false,
        }
    }

    fn remote_model(slug: &str) -> ModelInfo {
        serde_json::from_value(json!({
            "slug": slug,
            "display_name": slug,
            "description": null,
            "default_reasoning_level": "medium",
            "supported_reasoning_levels": [],
            "shell_type": "shell_command",
            "visibility": "list",
            "supported_in_api": true,
            "priority": 0,
            "upgrade": null,
            "support_verbosity": false,
            "default_verbosity": null,
            "apply_patch_tool_type": null,
            "truncation_policy": {"mode": "bytes", "limit": 10_000},
            "supports_image_detail_original": false,
            "context_window": 272_000,
            "max_context_window": 272_000,
            "experimental_supported_tools": [],
        }))
        .expect("valid model")
    }

    fn bedrock_api_key_auth() -> CodexAuth {
        CodexAuth::BedrockApiKey(BedrockApiKeyAuth {
            api_key: "bedrock-api-key-test".to_string(),
            region: "us-east-1".to_string(),
        })
    }

    #[tokio::test]
    async fn scoped_auth_ignores_scope_for_non_openai_provider() {
        let provider = create_model_provider(
            create_oss_provider_with_base_url("http://localhost:11434/v1", WireApi::Responses),
            /*auth_manager*/ None,
        );

        let auth = provider
            .api_auth_for_scope(ProviderAuthScope {
                agent_identity_policy: AgentIdentityAuthPolicy::JwtOnly,
                session_source: SessionSource::Cli,
                agent_identity_session_fallback: AgentIdentitySessionFallback::default(),
            })
            .await
            .expect("auth should resolve");

        assert!(auth.auth.to_auth_headers().is_empty());
    }

    #[test]
    fn openai_provider_enables_remote_compaction() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            /*auth_manager*/ None,
        );

        assert_eq!(
            provider.capabilities(),
            ProviderCapabilities {
                remote_compaction: RemoteCompactionSupport::V2,
                ..ProviderCapabilities::default()
            }
        );
    }

    #[test]
    fn configured_provider_remote_compaction_matches_provider_support() {
        let cases = [
            (
                ModelProviderInfo::create_openai_provider(/*base_url*/ None),
                RemoteCompactionSupport::V2,
            ),
            (
                ModelProviderInfo {
                    name: "Azure".to_string(),
                    base_url: Some("https://example.com/openai".to_string()),
                    ..ModelProviderInfo::default()
                },
                RemoteCompactionSupport::V2,
            ),
            (
                ModelProviderInfo {
                    name: "Custom".to_string(),
                    base_url: Some("https://example.openai.azure.com/openai/v1".to_string()),
                    ..ModelProviderInfo::default()
                },
                RemoteCompactionSupport::V2,
            ),
            (
                provider_for("https://example.test/v1".to_string()),
                RemoteCompactionSupport::Unsupported,
            ),
        ];

        for (provider_info, expected) in cases {
            let provider = create_model_provider(provider_info, /*auth_manager*/ None);
            assert_eq!(provider.capabilities().remote_compaction, expected);
        }
    }

    #[test]
    fn configured_provider_uses_default_approval_review_preferred_model() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            /*auth_manager*/ None,
        );

        assert_eq!(
            provider.approval_review_preferred_model(),
            DEFAULT_APPROVAL_REVIEW_PREFERRED_MODEL
        );
    }

    #[test]
    fn configured_provider_uses_luna_for_approval_review_with_api_key_auth() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            Some(AuthManager::from_auth_for_testing(CodexAuth::from_api_key(
                "openai-api-key",
            ))),
        );

        assert_eq!(provider.approval_review_preferred_model(), "gpt-5.6-luna");
    }

    #[test]
    fn configured_provider_uses_default_approval_review_model_with_chatgpt_auth() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            Some(AuthManager::from_auth_for_testing(
                CodexAuth::create_dummy_chatgpt_auth_for_testing(),
            )),
        );

        assert_eq!(
            provider.approval_review_preferred_model(),
            DEFAULT_APPROVAL_REVIEW_PREFERRED_MODEL
        );
    }

    #[tokio::test]
    async fn configured_provider_runtime_base_url_uses_configured_base_url() {
        let provider = create_model_provider(
            provider_for("https://example.test/v1".to_string()),
            /*auth_manager*/ None,
        );

        assert_eq!(
            provider
                .runtime_base_url()
                .await
                .expect("runtime base URL should resolve"),
            Some("https://example.test/v1".to_string())
        );
    }

    #[test]
    fn create_model_provider_builds_command_auth_manager_without_base_manager() {
        let provider = create_model_provider(
            provider_info_with_command_auth(),
            /*auth_manager*/ None,
        );

        let auth_manager = provider
            .auth_manager()
            .expect("command auth provider should have an auth manager");

        assert!(auth_manager.has_external_auth());
    }

    #[test]
    fn create_model_provider_does_not_use_openai_auth_manager_for_amazon_bedrock_provider() {
        let provider = create_model_provider(
            ModelProviderInfo::create_amazon_bedrock_provider(Some(ModelProviderAwsAuthInfo {
                profile: Some("codex-bedrock".to_string()),
                region: None,
                auth_refresh: None,
            })),
            Some(AuthManager::from_auth_for_testing(CodexAuth::from_api_key(
                "openai-api-key",
            ))),
        );

        assert!(provider.auth_manager().is_none());
    }

    #[tokio::test]
    async fn shared_bedrock_auth_refresh_is_reused_only_for_matching_configuration() {
        const TEST_NAME: &str = "provider::tests::shared_bedrock_auth_refresh_is_reused_only_for_matching_configuration";
        const HELPER_ARG: &str = "CODEX_BEDROCK_SHARED_AUTH_REFRESH_COMMAND";
        const SUBPROCESS_ARG: &str = "CODEX_BEDROCK_SHARED_AUTH_REFRESH_SUBPROCESS";
        let arguments = std::env::args().collect::<Vec<_>>();
        if let Some(index) = arguments.iter().position(|argument| argument == HELPER_ARG) {
            let counter = &arguments[index + 2];
            std::thread::sleep(std::time::Duration::from_millis(50));
            let mut counter = std::fs::OpenOptions::new()
                .create(true)
                .append(true)
                .open(counter)
                .expect("refresh invocation counter should open");
            std::io::Write::write_all(&mut counter, b"1").expect("write invocation counter");
            return;
        }

        let counter = std::env::temp_dir().join(format!("bedrock-refresh-{}", std::process::id()));
        if !arguments.iter().any(|argument| argument == SUBPROCESS_ARG) {
            std::fs::create_dir(&counter).expect("AWS command directory should be created");
            let executable = std::env::current_exe().expect("test executable should be available");
            let aws = counter.join(format!("aws{}", std::env::consts::EXE_SUFFIX));
            std::fs::hard_link(&executable, &aws)
                .or_else(|_| std::fs::copy(&executable, &aws).map(|_| ()))
                .expect("test executable should be installed as aws");
            let existing_path = std::env::var_os("PATH").unwrap_or_default();
            let path = std::env::join_paths(
                std::iter::once(counter.clone()).chain(std::env::split_paths(&existing_path)),
            )
            .expect("test executable PATH should be valid");
            let output = tokio::process::Command::new(executable)
                .args(["--exact", TEST_NAME, "--skip", SUBPROCESS_ARG])
                .env("PATH", path)
                .env_remove("AWS_ACCESS_KEY_ID")
                .env_remove("AWS_SECRET_ACCESS_KEY")
                .output()
                .await
                .expect("isolated AWS refresh test should run");
            std::fs::remove_dir_all(&counter).expect("AWS command directory should be removed");
            assert!(output.status.success(), "{output:?}");
            return;
        }
        let _ = std::fs::remove_file(&counter);
        let aws = ModelProviderAwsAuthInfo {
            profile: Some("codex-bedrock".to_string()),
            region: Some("us-west-2".to_string()),
            auth_refresh: Some(AwsAuthRefreshConfig {
                command: "aws".to_string(),
                args: Vec::from(
                    [
                        "--exact",
                        TEST_NAME,
                        "--skip",
                        HELPER_ARG,
                        "--skip",
                        counter.to_str().expect("counter path should be UTF-8"),
                    ]
                    .map(RedactedString::from),
                ),
                timeout_ms: NonZeroU64::new(10_000).expect("timeout should be non-zero"),
            }),
        };
        let provider_info = ModelProviderInfo::create_amazon_bedrock_provider(Some(aws.clone()));

        let first = create_model_provider(
            provider_info.clone(),
            Some(AuthManager::from_auth_for_testing(CodexAuth::from_api_key(
                "openai-api-key",
            ))),
        );
        let second = create_model_provider(provider_info.clone(), /*auth_manager*/ None);
        let shared_state = process_shared_state();
        let shared_recovery = shared_state
            .aws_auth_recovery(&aws)
            .expect("test provider should have refresh configured");
        assert_eq!(Arc::strong_count(&shared_recovery), 3);
        assert!(first.auth_manager().is_none() && second.auth_manager().is_none());

        for provider in [&first, &second] {
            for (status, body, recoverable) in [
                (http::StatusCode::UNAUTHORIZED, "ExpiredToken", true),
                (http::StatusCode::FORBIDDEN, "InvalidClientTokenId", true),
                (http::StatusCode::FORBIDDEN, "AccessDeniedException", false),
            ] {
                let error = TransportError::Http {
                    status,
                    url: None,
                    headers: None,
                    body: Some(body.to_string()),
                };
                assert_eq!(provider.is_recoverable_auth_error(&error), recoverable);
            }
        }

        let mut invalid_aws = aws.clone();
        invalid_aws.auth_refresh.as_mut().expect("refresh").command = "not-aws".into();
        let invalid_provider = create_model_provider(
            ModelProviderInfo::create_amazon_bedrock_provider(Some(invalid_aws)),
            /*auth_manager*/ None,
        );
        let error = invalid_provider
            .recover_from_unauthorized()
            .await
            .expect_err("non-aws command should be rejected");
        assert!(!error.is_retryable());
        assert_eq!(error.to_string(), "AWS auth refresh command must be `aws`");

        let (first_result, second_result) = tokio::join!(
            first.recover_from_unauthorized(),
            second.recover_from_unauthorized()
        );
        assert_eq!(
            [first_result, second_result].map(|result| result.expect("provider should recover")),
            [ProviderUnauthorizedRecovery::Recovered; 2]
        );
        let read_counter = || std::fs::read_to_string(&counter).expect("read counter");
        assert_eq!(read_counter(), "1");

        assert_eq!(
            first
                .recover_from_unauthorized()
                .await
                .expect("later generation should recover"),
            ProviderUnauthorizedRecovery::Recovered
        );
        assert_eq!(read_counter(), "11");
        std::fs::remove_file(&counter).expect("refresh invocation counter should be removed");

        let different_profile = ModelProviderAwsAuthInfo {
            profile: Some("another-bedrock-profile".to_string()),
            ..aws.clone()
        };
        let other_recovery = shared_state
            .aws_auth_recovery(&different_profile)
            .expect("test provider should have refresh configured");
        assert!(!Arc::ptr_eq(&shared_recovery, &other_recovery));

        let released_recovery = Arc::downgrade(&shared_recovery);
        drop((first, second, shared_recovery));
        assert!(released_recovery.upgrade().is_none());
        assert!(shared_state.aws_auth_recovery(&aws).is_some());
    }

    #[tokio::test]
    async fn create_model_provider_uses_managed_auth_for_amazon_bedrock_provider() {
        let auth = bedrock_api_key_auth();
        let provider = create_model_provider(
            ModelProviderInfo::create_amazon_bedrock_provider(/*aws*/ None),
            Some(AuthManager::from_auth_for_testing(auth.clone())),
        );

        assert_eq!(provider.auth().await, Some(auth));
    }

    #[test]
    fn openai_provider_returns_unauthenticated_openai_account_state() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            /*auth_manager*/ None,
        );

        assert_eq!(
            provider.account_state(),
            Ok(ProviderAccountState {
                account: None,
                requires_openai_auth: true,
            })
        );
    }

    #[test]
    fn openai_provider_returns_api_key_account_state() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            Some(AuthManager::from_auth_for_testing(CodexAuth::from_api_key(
                "openai-api-key",
            ))),
        );

        assert_eq!(
            provider.account_state(),
            Ok(ProviderAccountState {
                account: Some(ProviderAccount::ApiKey),
                requires_openai_auth: true,
            })
        );
    }

    #[test]
    fn openai_provider_returns_chatgpt_account_state_without_email() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            Some(AuthManager::from_auth_for_testing(
                CodexAuth::create_dummy_chatgpt_auth_for_testing(),
            )),
        );

        assert_eq!(
            provider.account_state(),
            Ok(ProviderAccountState {
                account: Some(ProviderAccount::Chatgpt {
                    email: None,
                    plan_type: PlanType::Unknown,
                }),
                requires_openai_auth: true,
            })
        );
    }

    #[test]
    fn openai_provider_rejects_bedrock_api_key_account_state() {
        let provider = create_model_provider(
            ModelProviderInfo::create_openai_provider(/*base_url*/ None),
            Some(AuthManager::from_auth_for_testing(bedrock_api_key_auth())),
        );

        assert_eq!(
            provider.account_state(),
            Err(ProviderAccountError::UnsupportedBedrockApiKeyAuth)
        );
    }

    #[test]
    fn custom_non_openai_provider_returns_no_account_state() {
        let provider = create_model_provider(
            ModelProviderInfo {
                name: "Custom".to_string(),
                base_url: Some("http://localhost:1234/v1".to_string()),
                wire_api: WireApi::Responses,
                requires_openai_auth: false,
                ..Default::default()
            },
            /*auth_manager*/ None,
        );

        assert_eq!(
            provider.account_state(),
            Ok(ProviderAccountState {
                account: None,
                requires_openai_auth: false,
            })
        );
    }

    #[test]
    fn amazon_bedrock_provider_returns_bedrock_account_state() {
        let provider = create_model_provider(
            ModelProviderInfo::create_amazon_bedrock_provider(/*aws*/ None),
            /*auth_manager*/ None,
        );

        assert_eq!(
            provider.account_state(),
            Ok(ProviderAccountState {
                account: Some(ProviderAccount::AmazonBedrock {
                    uses_codex_managed_credentials: false,
                }),
                requires_openai_auth: false,
            })
        );
    }

    #[tokio::test]
    async fn amazon_bedrock_provider_creates_static_models_manager() {
        let provider = create_model_provider(
            ModelProviderInfo::create_amazon_bedrock_provider(/*aws*/ None),
            /*auth_manager*/ None,
        );
        let manager =
            provider.models_manager(test_codex_home(), /*config_model_catalog*/ None);
        let uncached_manager =
            provider.models_manager_without_cache(/*config_model_catalog*/ None);

        let catalog = manager
            .raw_model_catalog(
                RefreshStrategy::Online,
                HttpClientFactory::new(OutboundProxyPolicy::ReqwestDefault),
            )
            .await;
        let uncached_catalog = uncached_manager
            .raw_model_catalog(
                RefreshStrategy::Online,
                HttpClientFactory::new(OutboundProxyPolicy::ReqwestDefault),
            )
            .await;
        assert_eq!(uncached_catalog, catalog);
        for slug in ["openai.gpt-5.6-sol", "openai.gpt-6-astra"] {
            let model_info = manager
                .get_model_info(
                    slug,
                    &ModelsManagerConfig {
                        model_context_window: Some(1_000_000),
                        ..Default::default()
                    },
                )
                .await;
            let mut expected_model_info = manager
                .get_model_info(slug, &ModelsManagerConfig::default())
                .await;
            expected_model_info.context_window = Some(872_000);
            assert_eq!(model_info, expected_model_info);
        }

        let models = catalog
            .models
            .iter()
            .map(|model| (model.slug.as_str(), model.display_name.as_str()))
            .collect::<Vec<_>>();

        assert_eq!(
            models,
            vec![
                ("openai.gpt-5.6-sol", "GPT-5.6 Sol"),
                ("openai.gpt-6-astra", "GPT-6-Astra"),
                ("openai.gpt-5.6-terra", "GPT-5.6 Terra"),
                ("openai.gpt-5.6-luna", "GPT-5.6 Luna"),
                ("openai.gpt-5.5", "GPT-5.5"),
                ("openai.gpt-5.4", "GPT-5.4"),
            ]
        );

        let available_models = manager
            .list_models(
                RefreshStrategy::Online,
                HttpClientFactory::new(OutboundProxyPolicy::ReqwestDefault),
            )
            .await;
        assert_eq!(
            available_models
                .iter()
                .map(|preset| preset.model.as_str())
                .collect::<Vec<_>>(),
            vec![
                "openai.gpt-5.6-sol",
                "openai.gpt-6-astra",
                "openai.gpt-5.6-terra",
                "openai.gpt-5.6-luna",
                "openai.gpt-5.5",
                "openai.gpt-5.4",
            ]
        );

        let default_model = available_models
            .iter()
            .find(|preset| preset.is_default)
            .expect("Bedrock catalog should have a default model");

        assert_eq!(default_model.model, "openai.gpt-5.6-sol");
    }

    #[tokio::test]
    async fn configured_bedrock_catalog_only_allows_default_service_tier() {
        let configured_model = codex_models_manager::bundled_models_response()
            .expect("bundled models should parse")
            .models
            .into_iter()
            .find(|model| model.slug == "gpt-5.5")
            .expect("bundled models should include GPT-5.5");
        assert!(!configured_model.additional_speed_tiers.is_empty());
        assert!(!configured_model.service_tiers.is_empty());

        let provider = create_model_provider(
            ModelProviderInfo::create_amazon_bedrock_provider(/*aws*/ None),
            /*auth_manager*/ None,
        );
        let manager = provider.models_manager(
            test_codex_home(),
            Some(ModelsResponse {
                models: vec![configured_model],
            }),
        );

        let catalog = manager
            .raw_model_catalog(
                RefreshStrategy::Online,
                HttpClientFactory::new(OutboundProxyPolicy::ReqwestDefault),
            )
            .await;

        assert_eq!(catalog.models.len(), 1);
        assert_eq!(catalog.models[0].slug, "gpt-5.5");
        assert_eq!(
            catalog.models[0].additional_speed_tiers,
            Vec::<String>::new()
        );
        assert_eq!(catalog.models[0].service_tiers, Vec::new());
        assert_eq!(catalog.models[0].default_service_tier, None);
    }

    #[tokio::test]
    async fn configured_provider_models_manager_uses_provider_bearer_token() {
        let server = MockServer::start().await;
        let remote_models = vec![remote_model("provider-model")];

        Mock::given(method("GET"))
            .and(path("/models"))
            .and(header_regex("Authorization", "Bearer provider-token"))
            .respond_with(
                ResponseTemplate::new(200)
                    .insert_header("content-type", "application/json")
                    .set_body_json(ModelsResponse {
                        models: remote_models.clone(),
                    }),
            )
            .expect(1)
            .mount(&server)
            .await;

        let mut provider_info = provider_for(server.uri());
        provider_info.experimental_bearer_token = Some("provider-token".into());
        let provider = create_model_provider(
            provider_info,
            Some(AuthManager::from_auth_for_testing(
                CodexAuth::create_dummy_chatgpt_auth_for_testing(),
            )),
        );

        let manager =
            provider.models_manager(test_codex_home(), /*config_model_catalog*/ None);
        let catalog = manager
            .raw_model_catalog(
                RefreshStrategy::Online,
                HttpClientFactory::new(OutboundProxyPolicy::ReqwestDefault),
            )
            .await;

        assert!(
            catalog
                .models
                .iter()
                .any(|model| model.slug == "provider-model")
        );
    }
}