use axum::{
    extract::{Path, State},
    http::StatusCode,
    response::{Html, IntoResponse, Json},
    routing::{get, post},
    Router,
};
use log::{error, info};
use serde::Deserialize;
use serde_json::Value;
use std::sync::Arc;

use crate::core::urls::ApiUrls;
use crate::shared::state::AppState;

pub mod conversations;
pub mod service;
use service::{DefaultTranscriptionService, MeetingService};

pub fn configure() -> Router<Arc<AppState>> {
    Router::new()
        .route(ApiUrls::VOICE_START, post(voice_start))
        .route(ApiUrls::VOICE_STOP, post(voice_stop))
        .route(ApiUrls::MEET_CREATE, post(create_meeting))
        .route(ApiUrls::MEET_ROOMS, get(list_rooms))
        .route(ApiUrls::MEET_PARTICIPANTS, get(all_participants))
        .route(ApiUrls::MEET_RECENT, get(recent_meetings))
        .route(ApiUrls::MEET_SCHEDULED, get(scheduled_meetings))
        .route(
            &ApiUrls::MEET_ROOM_BY_ID.replace(":id", "{room_id}"),
            get(get_room),
        )
        .route(
            &ApiUrls::MEET_JOIN.replace(":id", "{room_id}"),
            post(join_room),
        )
        .route(
            &ApiUrls::MEET_TRANSCRIPTION.replace(":id", "{room_id}"),
            post(start_transcription),
        )
        .route(ApiUrls::MEET_TOKEN, post(get_meeting_token))
        .route(ApiUrls::MEET_INVITE, post(send_meeting_invites))
        .route(ApiUrls::WS_MEET, get(meeting_websocket))
        .route(
            "/conversations/create",
            post(conversations::create_conversation),
        )
        .route(
            "/conversations/{id}/join",
            post(conversations::join_conversation),
        )
        .route(
            "/conversations/:id/leave",
            post(conversations::leave_conversation),
        )
        .route(
            "/conversations/:id/members",
            get(conversations::get_conversation_members),
        )
        .route(
            "/conversations/:id/messages",
            get(conversations::get_conversation_messages),
        )
        .route(
            "/conversations/:id/messages/send",
            post(conversations::send_message),
        )
        .route(
            "/conversations/:id/messages/:message_id/edit",
            post(conversations::edit_message),
        )
        .route(
            "/conversations/:id/messages/:message_id/delete",
            post(conversations::delete_message),
        )
        .route(
            "/conversations/:id/messages/:message_id/react",
            post(conversations::react_to_message),
        )
        .route(
            "/conversations/:id/messages/:message_id/pin",
            post(conversations::pin_message),
        )
        .route(
            "/conversations/:id/messages/search",
            get(conversations::search_messages),
        )
        .route(
            "/conversations/:id/calls/start",
            post(conversations::start_call),
        )
        .route(
            "/conversations/:id/calls/join",
            post(conversations::join_call),
        )
        .route(
            "/conversations/:id/calls/leave",
            post(conversations::leave_call),
        )
        .route(
            "/conversations/:id/calls/mute",
            post(conversations::mute_call),
        )
        .route(
            "/conversations/:id/calls/unmute",
            post(conversations::unmute_call),
        )
        .route(
            "/conversations/:id/screen/share",
            post(conversations::start_screen_share),
        )
        .route(
            "/conversations/:id/screen/stop",
            post(conversations::stop_screen_share),
        )
        .route(
            "/conversations/:id/recording/start",
            post(conversations::start_recording),
        )
        .route(
            "/conversations/:id/recording/stop",
            post(conversations::stop_recording),
        )
        .route(
            "/conversations/:id/whiteboard/create",
            post(conversations::create_whiteboard),
        )
        .route(
            "/conversations/:id/whiteboard/collaborate",
            post(conversations::collaborate_whiteboard),
        )
}

#[derive(Debug, Deserialize)]
pub struct CreateMeetingRequest {
    pub name: String,
    pub created_by: String,
    pub settings: Option<service::MeetingSettings>,
}

#[derive(Debug, Deserialize)]
pub struct JoinRoomRequest {
    pub participant_name: String,
    pub participant_id: Option<String>,
}

#[derive(Debug, Deserialize)]
pub struct GetTokenRequest {
    pub room_id: String,
    pub user_id: String,
}

#[derive(Debug, Deserialize)]
pub struct SendInvitesRequest {
    pub room_id: String,
    pub emails: Vec<String>,
}

pub async fn voice_start(
    State(data): State<Arc<AppState>>,
    Json(info): Json<Value>,
) -> impl IntoResponse {
    let session_id = info
        .get("session_id")
        .and_then(|s| s.as_str())
        .unwrap_or("");
    let user_id = info
        .get("user_id")
        .and_then(|u| u.as_str())
        .unwrap_or("user");

    info!(
        "Voice session start request - session: {}, user: {}",
        session_id, user_id
    );

    match data
        .voice_adapter
        .start_voice_session(session_id, user_id)
        .await
    {
        Ok(token) => {
            info!(
                "Voice session started successfully for session {session_id}"
            );
            (
                StatusCode::OK,
                Json(serde_json::json!({"token": token, "status": "started"})),
            )
        }
        Err(e) => {
            error!(
                "Failed to start voice session for session {session_id}: {e}"
            );
            (
                StatusCode::INTERNAL_SERVER_ERROR,
                Json(serde_json::json!({"error": e.to_string()})),
            )
        }
    }
}

pub async fn voice_stop(
    State(data): State<Arc<AppState>>,
    Json(info): Json<Value>,
) -> impl IntoResponse {
    let session_id = info
        .get("session_id")
        .and_then(|s| s.as_str())
        .unwrap_or("");

    match data.voice_adapter.stop_voice_session(session_id).await {
        Ok(()) => {
            info!(
                "Voice session stopped successfully for session {session_id}"
            );
            (
                StatusCode::OK,
                Json(serde_json::json!({"status": "stopped"})),
            )
        }
        Err(e) => {
            error!(
                "Failed to stop voice session for session {session_id}: {e}"
            );
            (
                StatusCode::INTERNAL_SERVER_ERROR,
                Json(serde_json::json!({"error": e.to_string()})),
            )
        }
    }
}

pub async fn create_meeting(
    State(state): State<Arc<AppState>>,
    Json(payload): Json<CreateMeetingRequest>,
) -> impl IntoResponse {
    let transcription_service = Arc::new(DefaultTranscriptionService);
    let meeting_service = MeetingService::new(state.clone(), transcription_service);

    match meeting_service
        .create_room(payload.name, payload.created_by, payload.settings)
        .await
    {
        Ok(room) => {
            info!("Created meeting room: {}", room.id);
            (StatusCode::OK, Json(serde_json::json!(room)))
        }
        Err(e) => {
            error!("Failed to create meeting room: {e}");
            (
                StatusCode::INTERNAL_SERVER_ERROR,
                Json(serde_json::json!({"error": e.to_string()})),
            )
        }
    }
}

pub async fn list_rooms(State(state): State<Arc<AppState>>) -> Html<String> {
    let transcription_service = Arc::new(DefaultTranscriptionService);
    let meeting_service = MeetingService::new(state.clone(), transcription_service);

    let rooms = meeting_service.rooms.read().await;

    if rooms.is_empty() {
        return Html(r##"<div class="empty-state">
            <div class="empty-icon">📹</div>
            <p>No active rooms</p>
            <p class="empty-hint">Create a new meeting to get started</p>
        </div>"##.to_string());
    }

    let mut html = String::new();
    for room in rooms.values() {
        let participant_count = room.participants.len();
        html.push_str(&format!(
            r##"<div class="room-card" data-room-id="{id}">
                <div class="room-icon">📹</div>
                <div class="room-info">
                    <h3 class="room-name">{name}</h3>
                    <span class="room-participants">{count} participant(s)</span>
                </div>
                <button class="btn-join" hx-post="/api/meet/rooms/{id}/join" hx-target="#meeting-room" hx-swap="outerHTML">Join</button>
            </div>"##,
            id = room.id,
            name = room.name,
            count = participant_count,
        ));
    }

    Html(html)
}

pub async fn get_room(
    State(state): State<Arc<AppState>>,
    Path(room_id): Path<String>,
) -> impl IntoResponse {
    let transcription_service = Arc::new(DefaultTranscriptionService);
    let meeting_service = MeetingService::new(state.clone(), transcription_service);

    let rooms = meeting_service.rooms.read().await;
    match rooms.get(&room_id) {
        Some(room) => (StatusCode::OK, Json(serde_json::json!(room))),
        None => (
            StatusCode::NOT_FOUND,
            Json(serde_json::json!({"error": "Room not found"})),
        ),
    }
}

pub async fn join_room(
    State(state): State<Arc<AppState>>,
    Path(room_id): Path<String>,
    Json(payload): Json<JoinRoomRequest>,
) -> impl IntoResponse {
    let transcription_service = Arc::new(DefaultTranscriptionService);
    let meeting_service = MeetingService::new(state.clone(), transcription_service);

    match meeting_service
        .join_room(&room_id, payload.participant_name, payload.participant_id)
        .await
    {
        Ok(participant) => {
            info!("Participant {} joined room {room_id}", participant.id);
            (StatusCode::OK, Json(serde_json::json!(participant)))
        }
        Err(e) => {
            error!("Failed to join room {room_id}: {e}");
            (
                StatusCode::INTERNAL_SERVER_ERROR,
                Json(serde_json::json!({"error": e.to_string()})),
            )
        }
    }
}

pub async fn start_transcription(
    State(state): State<Arc<AppState>>,
    Path(room_id): Path<String>,
) -> impl IntoResponse {
    let transcription_service = Arc::new(DefaultTranscriptionService);
    let meeting_service = MeetingService::new(state.clone(), transcription_service);

    match meeting_service.start_transcription(&room_id).await {
        Ok(()) => {
            info!("Started transcription for room {room_id}");
            (
                StatusCode::OK,
                Json(serde_json::json!({"status": "transcription_started"})),
            )
        }
        Err(e) => {
            error!("Failed to start transcription for room {room_id}: {e}");
            (
                StatusCode::INTERNAL_SERVER_ERROR,
                Json(serde_json::json!({"error": e.to_string()})),
            )
        }
    }
}

pub async fn get_meeting_token(
    State(_state): State<Arc<AppState>>,
    Json(payload): Json<GetTokenRequest>,
) -> impl IntoResponse {
    let token = format!(
        "meet_token_{}_{}_{}",
        payload.room_id,
        payload.user_id,
        uuid::Uuid::new_v4()
    );

    (
        StatusCode::OK,
        Json(serde_json::json!({
            "token": token,
            "room_id": payload.room_id,
            "user_id": payload.user_id
        })),
    )
}

pub async fn send_meeting_invites(
    State(_state): State<Arc<AppState>>,
    Json(payload): Json<SendInvitesRequest>,
) -> impl IntoResponse {
    info!("Sending meeting invites for room {}", payload.room_id);

    (
        StatusCode::OK,
        Json(serde_json::json!({
            "status": "invites_sent",
            "recipients": payload.emails
        })),
    )
}

pub async fn meeting_websocket(
    ws: axum::extract::ws::WebSocketUpgrade,
    State(state): State<Arc<AppState>>,
) -> impl IntoResponse {
    ws.on_upgrade(|socket| handle_meeting_socket(socket, state))
}

#[allow(clippy::unused_async)]
async fn handle_meeting_socket(_socket: axum::extract::ws::WebSocket, _state: Arc<AppState>) {
    info!("Meeting WebSocket connection established");
}

pub async fn all_participants(State(_state): State<Arc<AppState>>) -> Html<String> {
    Html(r##"<div class="empty-state">
        <p>No participants</p>
    </div>"##.to_string())
}

pub async fn recent_meetings(State(_state): State<Arc<AppState>>) -> Html<String> {
    Html(r##"<div class="empty-state">
        <div class="empty-icon">📋</div>
        <p>No recent meetings</p>
    </div>"##.to_string())
}

pub async fn scheduled_meetings(State(_state): State<Arc<AppState>>) -> Html<String> {
    Html(r##"<div class="empty-state">
        <div class="empty-icon">📅</div>
        <p>No scheduled meetings</p>
    </div>"##.to_string())
}