package router

import (
	"net/http"

	"chatapp3-golang/internal/common"
	"chatapp3-golang/internal/service/gameprovider"

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

// registerGameProviderRoutes 注册统一游戏厂商 app 路由。
func registerGameProviderRoutes(engine *gin.Engine, javaClient authGateway, registry *gameprovider.Registry) {
	if registry == nil {
		return
	}

	appGroup := engine.Group("/app/game")
	appGroup.Use(authMiddleware(javaClient))
	appGroup.GET("/room/shortcut", func(c *gin.Context) {
		resp, err := registry.ListShortcutGames(c.Request.Context(), mustAuthUser(c), c.Query("roomId"))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, stripProvidersFromRoomGameItems(resp))
	})
	appGroup.GET("/room/list", func(c *gin.Context) {
		resp, err := registry.ListRoomGames(c.Request.Context(), mustAuthUser(c), c.Query("roomId"), c.Query("category"))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, stripProvidersFromRoomGameListResponse(resp))
	})
	appGroup.GET("/state", func(c *gin.Context) {
		resp, err := registry.GetRoomState(c.Request.Context(), mustAuthUser(c), c.Query("roomId"))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, stripProviderFromRoomState(resp))
	})
	appGroup.POST("/launch", func(c *gin.Context) {
		var req gameprovider.LaunchRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			writeError(c, common.NewAppError(http.StatusBadRequest, "bad_request", err.Error()))
			return
		}
		resp, err := registry.LaunchGame(c.Request.Context(), mustAuthUser(c), req, resolveClientIP(c))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, stripProviderFromLaunch(resp))
	})
	appGroup.POST("/close", func(c *gin.Context) {
		var req gameprovider.CloseRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			writeError(c, common.NewAppError(http.StatusBadRequest, "bad_request", err.Error()))
			return
		}
		resp, err := registry.CloseGame(c.Request.Context(), mustAuthUser(c), req)
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, stripProviderFromRoomState(resp))
	})

	providerGroup := engine.Group("/app/game/providers")
	providerGroup.Use(authMiddleware(javaClient))
	providerGroup.GET("", func(c *gin.Context) {
		writeOK(c, registry.List())
	})
	providerGroup.GET("/:provider/room/shortcut", func(c *gin.Context) {
		provider, ok := resolveGameProvider(c, registry)
		if !ok {
			return
		}
		resp, err := provider.ListShortcutGames(c.Request.Context(), mustAuthUser(c), c.Query("roomId"))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, gin.H{"items": resp})
	})
	providerGroup.GET("/:provider/room/list", func(c *gin.Context) {
		provider, ok := resolveGameProvider(c, registry)
		if !ok {
			return
		}
		resp, err := provider.ListRoomGames(c.Request.Context(), mustAuthUser(c), c.Query("roomId"), c.Query("category"))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, resp)
	})
	providerGroup.GET("/:provider/state", func(c *gin.Context) {
		provider, ok := resolveGameProvider(c, registry)
		if !ok {
			return
		}
		resp, err := provider.GetRoomState(c.Request.Context(), mustAuthUser(c), c.Query("roomId"))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, resp)
	})
	providerGroup.POST("/:provider/launch", func(c *gin.Context) {
		provider, ok := resolveGameProvider(c, registry)
		if !ok {
			return
		}
		var req gameprovider.LaunchRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			writeError(c, common.NewAppError(http.StatusBadRequest, "bad_request", err.Error()))
			return
		}
		resp, err := provider.LaunchGame(c.Request.Context(), mustAuthUser(c), req, resolveClientIP(c))
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, resp)
	})
	providerGroup.POST("/:provider/close", func(c *gin.Context) {
		provider, ok := resolveGameProvider(c, registry)
		if !ok {
			return
		}
		var req gameprovider.CloseRequest
		if err := c.ShouldBindJSON(&req); err != nil {
			writeError(c, common.NewAppError(http.StatusBadRequest, "bad_request", err.Error()))
			return
		}
		resp, err := provider.CloseGame(c.Request.Context(), mustAuthUser(c), req)
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, resp)
	})
}

func resolveGameProvider(c *gin.Context, registry *gameprovider.Registry) (gameprovider.Provider, bool) {
	provider, err := registry.Resolve(c.Param("provider"))
	if err != nil {
		writeError(c, err)
		return nil, false
	}
	return provider, true
}

func stripProvidersFromRoomGameItems(items []gameprovider.RoomGameListItem) []gameprovider.RoomGameListItem {
	if len(items) == 0 {
		return []gameprovider.RoomGameListItem{}
	}
	result := make([]gameprovider.RoomGameListItem, 0, len(items))
	for _, item := range items {
		item.Provider = ""
		result = append(result, item)
	}
	return result
}

func stripProvidersFromRoomGameListResponse(resp *gameprovider.RoomGameListResponse) *gameprovider.RoomGameListResponse {
	if resp == nil {
		return &gameprovider.RoomGameListResponse{Items: []gameprovider.RoomGameListItem{}}
	}
	return &gameprovider.RoomGameListResponse{
		Items: stripProvidersFromRoomGameItems(resp.Items),
	}
}

func stripProviderFromRoomState(resp *gameprovider.RoomStateResponse) *gameprovider.RoomStateResponse {
	if resp == nil {
		return nil
	}
	copied := *resp
	copied.Provider = ""
	return &copied
}

func stripProviderFromLaunch(resp *gameprovider.LaunchResponse) *gameprovider.LaunchResponse {
	if resp == nil {
		return nil
	}
	copied := *resp
	copied.Provider = ""
	copied.RoomState = *stripProviderFromRoomState(&resp.RoomState)
	return &copied
}