use std::borrow::Cow;
use std::sync::Arc;
use std::sync::Mutex as StdMutex;
use std::time::Duration;

use anyhow::Result;
use app_test_support::ChatGptAuthFixture;
use app_test_support::McpProcess;
use app_test_support::to_response;
use app_test_support::write_chatgpt_auth;
use axum::Json;
use axum::Router;
use axum::extract::State;
use axum::http::HeaderMap;
use axum::http::StatusCode;
use axum::http::Uri;
use axum::http::header::AUTHORIZATION;
use axum::routing::get;
use codex_app_server_protocol::AppInfo;
use codex_app_server_protocol::AppSummary;
use codex_app_server_protocol::JSONRPCResponse;
use codex_app_server_protocol::PluginAuthPolicy;
use codex_app_server_protocol::PluginInstallParams;
use codex_app_server_protocol::PluginInstallResponse;
use codex_app_server_protocol::RequestId;
use codex_core::auth::AuthCredentialsStoreMode;
use codex_utils_absolute_path::AbsolutePathBuf;
use pretty_assertions::assert_eq;
use rmcp::handler::server::ServerHandler;
use rmcp::model::JsonObject;
use rmcp::model::ListToolsResult;
use rmcp::model::Meta;
use rmcp::model::ServerCapabilities;
use rmcp::model::ServerInfo;
use rmcp::model::Tool;
use rmcp::model::ToolAnnotations;
use rmcp::transport::StreamableHttpServerConfig;
use rmcp::transport::StreamableHttpService;
use rmcp::transport::streamable_http_server::session::local::LocalSessionManager;
use serde_json::json;
use tempfile::TempDir;
use tokio::net::TcpListener;
use tokio::task::JoinHandle;
use tokio::time::timeout;

const DEFAULT_TIMEOUT: Duration = Duration::from_secs(10);

#[tokio::test]
async fn plugin_install_rejects_relative_marketplace_paths() -> Result<()> {
    let codex_home = TempDir::new()?;
    let mut mcp = McpProcess::new(codex_home.path()).await?;
    timeout(DEFAULT_TIMEOUT, mcp.initialize()).await??;

    let request_id = mcp
        .send_raw_request(
            "plugin/install",
            Some(serde_json::json!({
                "marketplacePath": "relative-marketplace.json",
                "pluginName": "missing-plugin",
            })),
        )
        .await?;

    let err = timeout(
        DEFAULT_TIMEOUT,
        mcp.read_stream_until_error_message(RequestId::Integer(request_id)),
    )
    .await??;

    assert_eq!(err.error.code, -32600);
    assert!(err.error.message.contains("Invalid request"));
    Ok(())
}

#[tokio::test]
async fn plugin_install_returns_invalid_request_for_missing_marketplace_file() -> Result<()> {
    let codex_home = TempDir::new()?;
    let mut mcp = McpProcess::new(codex_home.path()).await?;
    timeout(DEFAULT_TIMEOUT, mcp.initialize()).await??;

    let request_id = mcp
        .send_plugin_install_request(PluginInstallParams {
            marketplace_path: AbsolutePathBuf::try_from(
                codex_home.path().join("missing-marketplace.json"),
            )?,
            plugin_name: "missing-plugin".to_string(),
        })
        .await?;

    let err = timeout(
        DEFAULT_TIMEOUT,
        mcp.read_stream_until_error_message(RequestId::Integer(request_id)),
    )
    .await??;

    assert_eq!(err.error.code, -32600);
    assert!(err.error.message.contains("marketplace file"));
    assert!(err.error.message.contains("does not exist"));
    Ok(())
}

#[tokio::test]
async fn plugin_install_returns_invalid_request_for_not_available_plugin() -> Result<()> {
    let codex_home = TempDir::new()?;
    let repo_root = TempDir::new()?;
    write_plugin_marketplace(
        repo_root.path(),
        "debug",
        "sample-plugin",
        "./sample-plugin",
        Some("NOT_AVAILABLE"),
        None,
    )?;
    write_plugin_source(repo_root.path(), "sample-plugin", &[])?;
    let marketplace_path =
        AbsolutePathBuf::try_from(repo_root.path().join(".agents/plugins/marketplace.json"))?;

    let mut mcp = McpProcess::new(codex_home.path()).await?;
    timeout(DEFAULT_TIMEOUT, mcp.initialize()).await??;

    let request_id = mcp
        .send_plugin_install_request(PluginInstallParams {
            marketplace_path,
            plugin_name: "sample-plugin".to_string(),
        })
        .await?;

    let err = timeout(
        DEFAULT_TIMEOUT,
        mcp.read_stream_until_error_message(RequestId::Integer(request_id)),
    )
    .await??;

    assert_eq!(err.error.code, -32600);
    assert!(err.error.message.contains("not available for install"));
    Ok(())
}

#[tokio::test]
async fn plugin_install_returns_apps_needing_auth() -> Result<()> {
    let connectors = vec![
        AppInfo {
            id: "alpha".to_string(),
            name: "Alpha".to_string(),
            description: Some("Alpha connector".to_string()),
            logo_url: Some("https://example.com/alpha.png".to_string()),
            logo_url_dark: None,
            distribution_channel: Some("featured".to_string()),
            branding: None,
            app_metadata: None,
            labels: None,
            install_url: None,
            is_accessible: false,
            is_enabled: true,
            plugin_display_names: Vec::new(),
        },
        AppInfo {
            id: "beta".to_string(),
            name: "Beta".to_string(),
            description: Some("Beta connector".to_string()),
            logo_url: None,
            logo_url_dark: None,
            distribution_channel: None,
            branding: None,
            app_metadata: None,
            labels: None,
            install_url: None,
            is_accessible: false,
            is_enabled: true,
            plugin_display_names: Vec::new(),
        },
    ];
    let tools = vec![connector_tool("beta", "Beta App")?];
    let (server_url, server_handle) = start_apps_server(connectors, tools).await?;

    let codex_home = TempDir::new()?;
    write_connectors_config(codex_home.path(), &server_url)?;
    write_chatgpt_auth(
        codex_home.path(),
        ChatGptAuthFixture::new("chatgpt-token")
            .account_id("account-123")
            .chatgpt_user_id("user-123")
            .chatgpt_account_id("account-123"),
        AuthCredentialsStoreMode::File,
    )?;

    let repo_root = TempDir::new()?;
    write_plugin_marketplace(
        repo_root.path(),
        "debug",
        "sample-plugin",
        "./sample-plugin",
        None,
        Some("ON_INSTALL"),
    )?;
    write_plugin_source(repo_root.path(), "sample-plugin", &["alpha", "beta"])?;
    let marketplace_path =
        AbsolutePathBuf::try_from(repo_root.path().join(".agents/plugins/marketplace.json"))?;

    let mut mcp = McpProcess::new(codex_home.path()).await?;
    timeout(DEFAULT_TIMEOUT, mcp.initialize()).await??;

    let request_id = mcp
        .send_plugin_install_request(PluginInstallParams {
            marketplace_path,
            plugin_name: "sample-plugin".to_string(),
        })
        .await?;

    let response: JSONRPCResponse = timeout(
        DEFAULT_TIMEOUT,
        mcp.read_stream_until_response_message(RequestId::Integer(request_id)),
    )
    .await??;
    let response: PluginInstallResponse = to_response(response)?;

    assert_eq!(
        response,
        PluginInstallResponse {
            auth_policy: Some(PluginAuthPolicy::OnInstall),
            apps_needing_auth: vec![AppSummary {
                id: "alpha".to_string(),
                name: "Alpha".to_string(),
                description: Some("Alpha connector".to_string()),
                install_url: Some("https://chatgpt.com/apps/alpha/alpha".to_string()),
            }],
        }
    );

    server_handle.abort();
    let _ = server_handle.await;
    Ok(())
}

#[tokio::test]
async fn plugin_install_filters_disallowed_apps_needing_auth() -> Result<()> {
    let connectors = vec![AppInfo {
        id: "alpha".to_string(),
        name: "Alpha".to_string(),
        description: Some("Alpha connector".to_string()),
        logo_url: Some("https://example.com/alpha.png".to_string()),
        logo_url_dark: None,
        distribution_channel: Some("featured".to_string()),
        branding: None,
        app_metadata: None,
        labels: None,
        install_url: None,
        is_accessible: false,
        is_enabled: true,
        plugin_display_names: Vec::new(),
    }];
    let (server_url, server_handle) = start_apps_server(connectors, Vec::new()).await?;

    let codex_home = TempDir::new()?;
    write_connectors_config(codex_home.path(), &server_url)?;
    write_chatgpt_auth(
        codex_home.path(),
        ChatGptAuthFixture::new("chatgpt-token")
            .account_id("account-123")
            .chatgpt_user_id("user-123")
            .chatgpt_account_id("account-123"),
        AuthCredentialsStoreMode::File,
    )?;

    let repo_root = TempDir::new()?;
    write_plugin_marketplace(
        repo_root.path(),
        "debug",
        "sample-plugin",
        "./sample-plugin",
        None,
        Some("ON_USE"),
    )?;
    write_plugin_source(
        repo_root.path(),
        "sample-plugin",
        &["alpha", "asdk_app_6938a94a61d881918ef32cb999ff937c"],
    )?;
    let marketplace_path =
        AbsolutePathBuf::try_from(repo_root.path().join(".agents/plugins/marketplace.json"))?;

    let mut mcp = McpProcess::new(codex_home.path()).await?;
    timeout(DEFAULT_TIMEOUT, mcp.initialize()).await??;

    let request_id = mcp
        .send_plugin_install_request(PluginInstallParams {
            marketplace_path,
            plugin_name: "sample-plugin".to_string(),
        })
        .await?;

    let response: JSONRPCResponse = timeout(
        DEFAULT_TIMEOUT,
        mcp.read_stream_until_response_message(RequestId::Integer(request_id)),
    )
    .await??;
    let response: PluginInstallResponse = to_response(response)?;

    assert_eq!(
        response,
        PluginInstallResponse {
            auth_policy: Some(PluginAuthPolicy::OnUse),
            apps_needing_auth: vec![AppSummary {
                id: "alpha".to_string(),
                name: "Alpha".to_string(),
                description: Some("Alpha connector".to_string()),
                install_url: Some("https://chatgpt.com/apps/alpha/alpha".to_string()),
            }],
        }
    );

    server_handle.abort();
    let _ = server_handle.await;
    Ok(())
}

#[derive(Clone)]
struct AppsServerState {
    response: Arc<StdMutex<serde_json::Value>>,
}

#[derive(Clone)]
struct PluginInstallMcpServer {
    tools: Arc<StdMutex<Vec<Tool>>>,
}

impl ServerHandler for PluginInstallMcpServer {
    fn get_info(&self) -> ServerInfo {
        ServerInfo {
            capabilities: ServerCapabilities::builder().enable_tools().build(),
            ..ServerInfo::default()
        }
    }

    fn list_tools(
        &self,
        _request: Option<rmcp::model::PaginatedRequestParams>,
        _context: rmcp::service::RequestContext<rmcp::service::RoleServer>,
    ) -> impl std::future::Future<Output = Result<ListToolsResult, rmcp::ErrorData>> + Send + '_
    {
        let tools = self.tools.clone();
        async move {
            let tools = tools
                .lock()
                .unwrap_or_else(std::sync::PoisonError::into_inner)
                .clone();
            Ok(ListToolsResult {
                tools,
                next_cursor: None,
                meta: None,
            })
        }
    }
}

async fn start_apps_server(
    connectors: Vec<AppInfo>,
    tools: Vec<Tool>,
) -> Result<(String, JoinHandle<()>)> {
    let state = Arc::new(AppsServerState {
        response: Arc::new(StdMutex::new(
            json!({ "apps": connectors, "next_token": null }),
        )),
    });
    let tools = Arc::new(StdMutex::new(tools));

    let listener = TcpListener::bind("127.0.0.1:0").await?;
    let addr = listener.local_addr()?;
    let mcp_service = StreamableHttpService::new(
        {
            let tools = tools.clone();
            move || {
                Ok(PluginInstallMcpServer {
                    tools: tools.clone(),
                })
            }
        },
        Arc::new(LocalSessionManager::default()),
        StreamableHttpServerConfig::default(),
    );
    let router = Router::new()
        .route("/connectors/directory/list", get(list_directory_connectors))
        .route(
            "/connectors/directory/list_workspace",
            get(list_directory_connectors),
        )
        .with_state(state)
        .nest_service("/api/codex/apps", mcp_service);

    let handle = tokio::spawn(async move {
        let _ = axum::serve(listener, router).await;
    });

    Ok((format!("http://{addr}"), handle))
}

async fn list_directory_connectors(
    State(state): State<Arc<AppsServerState>>,
    headers: HeaderMap,
    uri: Uri,
) -> Result<impl axum::response::IntoResponse, StatusCode> {
    let bearer_ok = headers
        .get(AUTHORIZATION)
        .and_then(|value| value.to_str().ok())
        .is_some_and(|value| value == "Bearer chatgpt-token");
    let account_ok = headers
        .get("chatgpt-account-id")
        .and_then(|value| value.to_str().ok())
        .is_some_and(|value| value == "account-123");
    let external_logos_ok = uri
        .query()
        .is_some_and(|query| query.split('&').any(|pair| pair == "external_logos=true"));

    if !bearer_ok || !account_ok {
        Err(StatusCode::UNAUTHORIZED)
    } else if !external_logos_ok {
        Err(StatusCode::BAD_REQUEST)
    } else {
        let response = state
            .response
            .lock()
            .unwrap_or_else(std::sync::PoisonError::into_inner)
            .clone();
        Ok(Json(response))
    }
}

fn connector_tool(connector_id: &str, connector_name: &str) -> Result<Tool> {
    let schema: JsonObject = serde_json::from_value(json!({
        "type": "object",
        "additionalProperties": false
    }))?;
    let mut tool = Tool::new(
        Cow::Owned(format!("connector_{connector_id}")),
        Cow::Borrowed("Connector test tool"),
        Arc::new(schema),
    );
    tool.annotations = Some(ToolAnnotations::new().read_only(true));

    let mut meta = Meta::new();
    meta.0
        .insert("connector_id".to_string(), json!(connector_id));
    meta.0
        .insert("connector_name".to_string(), json!(connector_name));
    tool.meta = Some(meta);
    Ok(tool)
}

fn write_connectors_config(codex_home: &std::path::Path, base_url: &str) -> std::io::Result<()> {
    std::fs::write(
        codex_home.join("config.toml"),
        format!(
            r#"
chatgpt_base_url = "{base_url}"
mcp_oauth_credentials_store = "file"

[features]
connectors = true
"#
        ),
    )
}

fn write_plugin_marketplace(
    repo_root: &std::path::Path,
    marketplace_name: &str,
    plugin_name: &str,
    source_path: &str,
    install_policy: Option<&str>,
    auth_policy: Option<&str>,
) -> std::io::Result<()> {
    let install_policy = install_policy
        .map(|install_policy| format!(",\n      \"installPolicy\": \"{install_policy}\""))
        .unwrap_or_default();
    let auth_policy = auth_policy
        .map(|auth_policy| format!(",\n      \"authPolicy\": \"{auth_policy}\""))
        .unwrap_or_default();
    std::fs::create_dir_all(repo_root.join(".git"))?;
    std::fs::create_dir_all(repo_root.join(".agents/plugins"))?;
    std::fs::write(
        repo_root.join(".agents/plugins/marketplace.json"),
        format!(
            r#"{{
  "name": "{marketplace_name}",
  "plugins": [
    {{
      "name": "{plugin_name}",
      "source": {{
        "source": "local",
        "path": "{source_path}"
      }}{install_policy}{auth_policy}
    }}
  ]
}}"#
        ),
    )
}

fn write_plugin_source(
    repo_root: &std::path::Path,
    plugin_name: &str,
    app_ids: &[&str],
) -> Result<()> {
    let plugin_root = repo_root.join(plugin_name);
    std::fs::create_dir_all(plugin_root.join(".codex-plugin"))?;
    std::fs::write(
        plugin_root.join(".codex-plugin/plugin.json"),
        format!(r#"{{"name":"{plugin_name}"}}"#),
    )?;

    let apps = app_ids
        .iter()
        .map(|app_id| ((*app_id).to_string(), json!({ "id": app_id })))
        .collect::<serde_json::Map<_, _>>();
    std::fs::write(
        plugin_root.join(".app.json"),
        serde_json::to_vec_pretty(&json!({ "apps": apps }))?,
    )?;
    Ok(())
}