/**
 * package api
 *
 * 媒体服务监控 API 处理器
 * 功能：
 * 1. 查看媒体服务器状态
 * 2. 查看活跃房间和流
 * 3. 管理桥接器
 */
package api

import (
	"xk-websocket-v2/internal/mediaserver"
	"xk-websocket-v2/internal/utils"

	"github.com/gin-gonic/gin"
)

// MediaServerStatusResponse 媒体服务器状态响应
type MediaServerStatusResponse struct {
	Enabled        bool                   `json:"enabled"`
	Config         map[string]interface{} `json:"config"`
	RoomCount      int                    `json:"room_count"`
	SFUTrackCount  int                    `json:"sfu_track_count"`
	RTMPStreamCount int                   `json:"rtmp_stream_count"`
}

// GetMediaServerStatusHandler 获取媒体服务器状态
// GET /api/media/status
func GetMediaServerStatusHandler(c *gin.Context) {
	ms := mediaserver.GetServer()
	config := ms.GetConfig()
	
	if config == nil {
		utils.Error(c, 503, "媒体服务未配置")
		return
	}
	
	response := MediaServerStatusResponse{
		Enabled:   config.Enabled,
		RoomCount: ms.GetRoomCount(),
		Config: map[string]interface{}{
			"public_ip":     config.PublicIP,
			"webrtc_port":   config.WebRTCPort,
			"rtmp_port":     config.RTMPPort,
			"http_flv_port": config.HTTPFLVPort,
			"max_room_size": config.MaxRoomSize,
		},
	}
	
	// 获取 SFU 轨道数
	if sfu := ms.GetSFU(); sfu != nil {
		response.SFUTrackCount = sfu.GetTrackCount()
	}
	
	// 获取 RTMP 流数
	if rtmp := ms.GetRTMP(); rtmp != nil {
		response.RTMPStreamCount = rtmp.GetStreamCount()
	}
	
	utils.SuccessWithData(c, response, "获取成功")
}

// GetAllRoomsHandler 获取所有房间
// GET /api/media/rooms
func GetAllRoomsHandler(c *gin.Context) {
	ms := mediaserver.GetServer()
	rooms := ms.GetAllRooms()
	
	utils.SuccessWithData(c, gin.H{
		"count": len(rooms),
		"rooms": rooms,
	}, "获取成功")
}

// GetRoomDetailHandler 获取房间详情
// GET /api/media/rooms/:room_id
func GetRoomDetailHandler(c *gin.Context) {
	roomID := c.Param("room_id")
	if roomID == "" {
		utils.BadRequest(c, "房间ID不能为空")
		return
	}
	
	ms := mediaserver.GetServer()
	room := ms.GetRoom(roomID)
	if room == nil {
		utils.NotFound(c, "房间不存在")
		return
	}
	
	info := room.GetInfo()
	
	// 获取桥接信息
	bm := mediaserver.GetBridgeManager()
	bridge := bm.GetBridge(roomID)
	var bridgeInfo map[string]interface{}
	if bridge != nil && bridge.IsRunning() {
		w2r, r2w := bridge.GetAllConverters()
		w2rCount, r2wCount := bridge.GetConverterCount()
		bridgeInfo = map[string]interface{}{
			"running":          true,
			"webrtc_to_rtmp":   w2rCount,
			"rtmp_to_webrtc":   r2wCount,
			"w2r_converters":   w2r,
			"r2w_converters":   r2w,
		}
	}
	
	utils.SuccessWithData(c, gin.H{
		"room":   info,
		"bridge": bridgeInfo,
	}, "获取成功")
}

// GetRTMPStreamsHandler 获取 RTMP 流列表
// GET /api/media/rtmp/streams
func GetRTMPStreamsHandler(c *gin.Context) {
	ms := mediaserver.GetServer()
	rtmp := ms.GetRTMP()
	
	if rtmp == nil {
		utils.Error(c, 503, "RTMP服务未启用")
		return
	}
	
	roomID := c.Query("room_id")
	
	var streams []*mediaserver.RTMPStream
	if roomID != "" {
		streams = rtmp.GetStreamsByRoom(roomID)
	} else {
		// 获取所有流（简化实现：只返回数量）
		utils.SuccessWithData(c, gin.H{
			"count": rtmp.GetStreamCount(),
		}, "获取成功")
		return
	}
	
	utils.SuccessWithData(c, gin.H{
		"count":   len(streams),
		"streams": streams,
	}, "获取成功")
}

// CloseRoomHandler 关闭房间
// POST /api/media/rooms/:room_id/close
func CloseRoomHandler(c *gin.Context) {
	roomID := c.Param("room_id")
	if roomID == "" {
		utils.BadRequest(c, "房间ID不能为空")
		return
	}
	
	ms := mediaserver.GetServer()
	room := ms.GetRoom(roomID)
	if room == nil {
		utils.NotFound(c, "房间不存在")
		return
	}
	
	// 移除桥接
	bm := mediaserver.GetBridgeManager()
	bm.RemoveBridge(roomID)
	
	// 移除房间
	ms.RemoveRoom(roomID)
	
	utils.Success(c, "房间已关闭")
}

// RegisterMediaRoutes 注册媒体相关路由
func RegisterMediaRoutes(router *gin.RouterGroup) {
	mediaGroup := router.Group("/media")
	{
		mediaGroup.GET("/status", GetMediaServerStatusHandler)
		mediaGroup.GET("/rooms", GetAllRoomsHandler)
		mediaGroup.GET("/rooms/:room_id", GetRoomDetailHandler)
		mediaGroup.POST("/rooms/:room_id/close", CloseRoomHandler)
		mediaGroup.GET("/rtmp/streams", GetRTMPStreamsHandler)
	}
}