use crate::app::{AppConfig, AppState};
use crate::context::RequestContext;
use crate::error::WebError;
use crate::routes::query_support::{
    execute_runtime_query_via_legacy_cloud, resolve_effective_workspace_id,
};
use axum::extract::{Extension, Query, State};
use axum::http::StatusCode;
use axum::Json;
use bridge_runtime::RuntimeQueryEnvelopeWire;
use serde::Deserialize;
use serde_json::{json, Value};

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct BridgeWorkspaceQuery {
    pub workspace_id: Option<String>,
    pub limit: Option<u32>,
    pub cursor: Option<String>,
    pub command_status: Option<String>,
    pub event_status: Option<String>,
    pub target_page_id: Option<String>,
    pub target_block_id: Option<String>,
    pub aggregate_type: Option<String>,
    pub aggregate_id: Option<String>,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct BridgeRequestQuery {
    pub workspace_id: Option<String>,
    pub request_id: String,
    pub command_id: Option<String>,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct BridgeTraceQuery {
    pub workspace_id: Option<String>,
    pub trace_id: String,
    pub command_id: Option<String>,
}

fn ok_response(context: &RequestContext, result: Value) -> (StatusCode, Json<Value>) {
    (
        StatusCode::OK,
        Json(json!({
            "ok": true,
            "requestId": context.trace.request_id,
            "traceId": context.trace.trace_id,
            "result": result,
        })),
    )
}

/// Cap bridge overview page size to avoid unbounded fan-out / memory pressure.
const BRIDGE_WORKSPACE_LIMIT_MAX: u32 = 200;
const BRIDGE_WORKSPACE_LIMIT_DEFAULT: u32 = 50;

fn clamped_bridge_limit(limit: Option<u32>) -> u32 {
    limit
        .unwrap_or(BRIDGE_WORKSPACE_LIMIT_DEFAULT)
        .clamp(1, BRIDGE_WORKSPACE_LIMIT_MAX)
}

fn workspace_query_payload(
    workspace_id: &str,
    query: &BridgeWorkspaceQuery,
) -> RuntimeQueryEnvelopeWire {
    RuntimeQueryEnvelopeWire {
        name: "bridge.workspace.overview".into(),
        payload: json!({
            "workspaceId": workspace_id,
            "limit": clamped_bridge_limit(query.limit),
            "cursor": query.cursor,
            "commandStatus": query.command_status,
            "eventStatus": query.event_status,
            "targetPageId": query.target_page_id,
            "targetBlockId": query.target_block_id,
            "aggregateType": query.aggregate_type,
            "aggregateId": query.aggregate_id,
        }),
    }
}

async fn execute_bridge_query(
    config: &AppConfig,
    context: &RequestContext,
    workspace_id: &str,
    query: RuntimeQueryEnvelopeWire,
) -> Result<Value, WebError> {
    execute_runtime_query_via_legacy_cloud(config, context, Some(workspace_id), query).await
}

fn require_resolved_workspace_id(
    context: &RequestContext,
    query_workspace_id: Option<&str>,
) -> Result<String, WebError> {
    resolve_effective_workspace_id(context, query_workspace_id, true)?.ok_or_else(|| {
        WebError::bad_request_code(
            "workspace_required",
            "缺少 workspaceId，请在 query 或请求头中提供有效工作区",
        )
        .with_context(context)
        .with_header("x-error-phase", "workspace_resolve")
    })
}

pub async fn workspace(
    State(state): State<AppState>,
    Extension(context): Extension<RequestContext>,
    Query(query): Query<BridgeWorkspaceQuery>,
) -> Result<(StatusCode, Json<Value>), WebError> {
    let effective_workspace_id =
        require_resolved_workspace_id(&context, query.workspace_id.as_deref())?;
    let result = execute_bridge_query(
        state.config(),
        &context,
        &effective_workspace_id,
        workspace_query_payload(&effective_workspace_id, &query),
    )
    .await?;
    Ok(ok_response(&context, result))
}

pub async fn request(
    State(state): State<AppState>,
    Extension(context): Extension<RequestContext>,
    Query(query): Query<BridgeRequestQuery>,
) -> Result<(StatusCode, Json<Value>), WebError> {
    let effective_workspace_id =
        require_resolved_workspace_id(&context, query.workspace_id.as_deref())?;
    let result = execute_bridge_query(
        state.config(),
        &context,
        &effective_workspace_id,
        RuntimeQueryEnvelopeWire {
            name: "bridge.request.get".into(),
            payload: json!({
                "workspaceId": effective_workspace_id,
                "requestId": query.request_id,
                "commandId": query.command_id,
            }),
        },
    )
    .await?;
    Ok(ok_response(&context, result))
}

pub async fn trace(
    State(state): State<AppState>,
    Extension(context): Extension<RequestContext>,
    Query(query): Query<BridgeTraceQuery>,
) -> Result<(StatusCode, Json<Value>), WebError> {
    let effective_workspace_id =
        require_resolved_workspace_id(&context, query.workspace_id.as_deref())?;
    let result = execute_bridge_query(
        state.config(),
        &context,
        &effective_workspace_id,
        RuntimeQueryEnvelopeWire {
            name: "bridge.trace.get".into(),
            payload: json!({
                "workspaceId": effective_workspace_id,
                "traceId": query.trace_id,
                "commandId": query.command_id,
            }),
        },
    )
    .await?;
    Ok(ok_response(&context, result))
}

#[cfg(test)]
mod tests {
    use crate::app::{build_app, AppConfig, AppState};
    use axum::body::Body;
    use axum::http::{Request, StatusCode};
    use tower::util::ServiceExt;

    fn app() -> axum::Router {
        build_app(AppState::new(AppConfig {
            service_name: "mnote-web".into(),
            service_version: "0.1.0".into(),
            bind_addr: "127.0.0.1:0".into(),
            public_bind_addr: "127.0.0.1:3000".into(),
            legacy_next_base_url: Some("http://127.0.0.1:3100".into()),
            enable_legacy_next_compat: true,
            enable_debug_shell_routes: false,
            enable_editor_actor: true,
            enable_page_ai_pi_lab: false,
            compat_next_base_path: "/api/compat/next".into(),
            convex_url: None,
            convex_admin_key: None,
            allow_dev_fixtures: true,
            query_fixtures_json: Some(r#"{"sidebar:datasetList":{"documents":[{"id":"page_root","workspace_id":"ws_demo","title":"工作区首页","parent_id":null,"sort_order":0,"is_starred":true,"is_template":false,"created_at":"2026-04-16T00:00:00Z","updated_at":"2026-04-16T00:00:00Z"},{"id":"page_child","workspace_id":"ws_demo","title":"子页面","parent_id":"page_root","sort_order":1,"is_starred":false,"is_template":false,"created_at":"2026-04-16T00:00:00Z","updated_at":"2026-04-16T00:00:00Z"}]},"bridgeLogs:listWorkspaceOverview":{"workspace_id":"ws_demo","command_logs":[{"command_id":"cmd_1","request_id":"req_1","status":"applied","created_at":"2026-04-16T00:00:00Z"}],"domain_events":[{"command_id":"cmd_1","status":"published","created_at":"2026-04-16T00:00:00Z"}],"next_cursor":null,"has_more":false,"filters":{"command_status":null,"event_status":null,"target_page_id":null,"target_block_id":null,"aggregate_type":null,"aggregate_id":null},"generated_at":"2026-04-16T00:00:00Z"}}"#.into()),
            mutation_fixtures_json: None,
            dev_user_id: "dev-user".into(),
            dev_user_name: "开发用户".into(),
            dev_user_email: "dev@mnote.local".into(),
            environment: "dev".into(),
        }))
    }

    #[tokio::test]
    async fn bridge_workspace_route_returns_runtime_result() {
        let response = app()
            .oneshot(
                Request::builder()
                    .uri("/api/bridge/workspace?workspaceId=ws_demo")
                    .body(Body::empty())
                    .expect("request"),
            )
            .await
            .expect("response");

        assert_eq!(response.status(), StatusCode::OK);
    }
}