import json
import queue

from flask import Response, jsonify, request, stream_with_context

from app.application.bot_controller import bot_controller
from app.infrastructure.service.backend.db import set_setting
from app.infrastructure.service.logging.log_query_service import clear_logs, query_event_json, query_events, query_summary, query_trace
from app.infrastructure.service.logging.log_service import log_event, new_trace_id


def _sync_runtime_settings(status):
    current = (status.get("status") or "stopped").strip().lower()
    running = current == "running"
    transitional = current in {"starting", "stopping"}
    errored = current == "error"
    if running:
        set_setting("listener_enabled", "1")
        set_setting("listener_runtime_status", "running")
    elif transitional:
        set_setting("listener_runtime_status", current)
    elif errored:
        set_setting("listener_enabled", "0")
        set_setting("listener_runtime_status", "error")
    else:
        set_setting("listener_enabled", "0")
        set_setting("listener_runtime_status", "stopped")


def register_bot_routes(app):
    def _stream_payload(status):
        return f"event: status\ndata: {json.dumps({'success': True, **status}, ensure_ascii=False)}\n\n"

    @app.route("/api/bot/status", methods=["GET"])
    def api_bot_status():
        trace_id = new_trace_id("api")
        status = bot_controller.status()
        _sync_runtime_settings(status)
        log_event("INFO", "api", "api.bot.status", trace_id, "status", "ok", "查询监听状态成功", extra={"status": status.get("status")})
        return jsonify({"success": True, **status})

    @app.route("/api/bot/status/stream", methods=["GET"])
    def api_bot_status_stream():
        status_queue = queue.Queue(maxsize=8)

        def on_status(status):
            _sync_runtime_settings(status)
            try:
                status_queue.put_nowait(status)
            except queue.Full:
                try:
                    status_queue.get_nowait()
                except queue.Empty:
                    pass
                try:
                    status_queue.put_nowait(status)
                except queue.Full:
                    pass

        listener_id = bot_controller.add_status_listener(on_status, emit_initial=True)

        @stream_with_context
        def generate():
            try:
                yield "retry: 2000\n\n"
                while True:
                    try:
                        status = status_queue.get(timeout=15)
                        yield _stream_payload(status)
                    except queue.Empty:
                        yield "event: ping\ndata: {}\n\n"
            finally:
                bot_controller.remove_status_listener(listener_id)

        return Response(generate(), mimetype="text/event-stream", headers={
            "Cache-Control": "no-cache",
            "Connection": "keep-alive",
            "X-Accel-Buffering": "no",
        })

    @app.route("/api/logs/v2/events", methods=["GET"])
    def api_logs_v2_events():
        trace_id = request.args.get("trace_id") or ""
        module = request.args.get("module") or ""
        level = request.args.get("level") or ""
        event = request.args.get("event") or ""
        start_ts = request.args.get("start_ts") or ""
        end_ts = request.args.get("end_ts") or ""
        keyword = request.args.get("keyword") or ""
        page = request.args.get("page", 1)
        size = request.args.get("size", 50)
        payload = query_events(module=module or None, level=level or None, event=event or None, trace_id=trace_id or None, start_ts=start_ts or None, end_ts=end_ts or None, keyword=keyword or None, page=page, size=size)
        return jsonify({"success": True, **payload})

    @app.route("/api/logs/v2/trace/<trace_id>", methods=["GET"])
    def api_logs_v2_trace(trace_id):
        items = query_trace(trace_id)
        return jsonify({"success": True, "trace_id": trace_id, "items": items})

    @app.route("/api/logs/v2/summary", methods=["GET"])
    def api_logs_v2_summary():
        limit = request.args.get("limit", 300)
        payload = query_summary(limit=limit)
        return jsonify({"success": True, **payload})

    @app.route("/api/logs/v2/event/<event_id>", methods=["GET"])
    def api_logs_v2_event(event_id):
        item = query_event_json(event_id)
        if not item:
            return jsonify({"success": False, "error": "event_not_found"}), 404
        return jsonify({"success": True, "item": item})

    @app.route("/api/logs/v2/clear", methods=["POST"])
    def api_logs_v2_clear():
        body = request.get_json(silent=True) or {}
        module = (body.get("module") or request.values.get("module") or request.args.get("module") or "").strip()
        payload = clear_logs(module=module or None)
        return jsonify({"success": True, **payload})

    @app.route("/api/bot/start", methods=["POST"])
    def api_bot_start():
        trace_id = new_trace_id("api")
        backend_url = (request.values.get("backend_url") or "").strip()
        if not backend_url:
            backend_url = request.host_url.rstrip("/") + "/api/messages/receive"
        status = bot_controller.start(backend_url)
        _sync_runtime_settings(status)
        log_event("INFO", "api", "api.bot.start", trace_id, "start", "ok", "启动监听请求已处理", extra={"status": status.get("status"), "backend_url": backend_url})
        return jsonify({"success": True, **status})

    @app.route("/api/bot/stop", methods=["POST"])
    def api_bot_stop():
        trace_id = new_trace_id("api")
        status = bot_controller.stop()
        _sync_runtime_settings(status)
        log_event("INFO", "api", "api.bot.stop", trace_id, "stop", "ok", "停止监听请求已处理", extra={"status": status.get("status")})
        return jsonify({"success": True, **status})