package router

import (
	"database/sql"
	"net/http"

	"gpt-manager-go/internal/handler"
	"gpt-manager-go/internal/middleware"
	"gpt-manager-go/internal/repository"
	"gpt-manager-go/internal/service"
	"gpt-manager-go/internal/static"
)

// SetupRoutes 设置路由
func SetupRoutes(db *sql.DB) http.Handler {
	mux := http.NewServeMux()

	// 初始化仓储
	adminRepo := repository.NewAdminRepository(db)
	chatgptAccountRepo := repository.NewChatGPTAccountRepository(db)
	invitationRepo := repository.NewInvitationRepository(db)
	cardKeyRepo := repository.NewCardKeyRepository(db)

	// 初始化服务
	chatgptService := service.NewChatGPTService()

	// 初始化处理器
	authHandler := handler.NewAuthHandler(adminRepo)
	accountHandler := handler.NewChatGPTAccountHandler(chatgptAccountRepo, invitationRepo, chatgptService)
	inviteHandler := handler.NewInviteHandler(chatgptAccountRepo, invitationRepo, cardKeyRepo, chatgptService)
	cardKeyHandler := handler.NewCardKeyHandler(cardKeyRepo)

	// 公开路由 (无需认证)
	mux.HandleFunc("/api/login", authHandler.Login)
	mux.HandleFunc("/api/invite/card", inviteHandler.InviteByCardKey) // 卡密邀请

	// 需要认证的路由
	protectedMux := http.NewServeMux()
	protectedMux.HandleFunc("/api/profile", func(w http.ResponseWriter, r *http.Request) {
		claims := middleware.GetUserFromContext(r.Context())
		w.Header().Set("Content-Type", "application/json")
		w.Write([]byte(`{"success":true,"user":{"id":` + itoa(claims.UserID) + `,"username":"` + claims.Username + `"}}`))
	})

	// ChatGPT 账号管理接口
	protectedMux.HandleFunc("/api/accounts", accountHandler.List)
	protectedMux.HandleFunc("/api/accounts/create", accountHandler.Create)
	protectedMux.HandleFunc("/api/accounts/refresh", accountHandler.Refresh)
	protectedMux.HandleFunc("/api/accounts/delete", accountHandler.Delete)
	protectedMux.HandleFunc("/api/accounts/batch/delete", accountHandler.BatchDelete)
	protectedMux.HandleFunc("/api/accounts/batch/refresh", accountHandler.BatchRefresh)

	// 邀请接口 (管理员) - GET: 列表, POST: 邀请, DELETE: 移除
	protectedMux.HandleFunc("/api/invite", func(w http.ResponseWriter, r *http.Request) {
		switch r.Method {
		case http.MethodGet:
			inviteHandler.ListByAccount(w, r)
		case http.MethodPost, http.MethodDelete:
			inviteHandler.InviteByAdmin(w, r)
		default:
			w.Header().Set("Content-Type", "application/json")
			w.WriteHeader(http.StatusMethodNotAllowed)
			w.Write([]byte(`{"success":false,"message":"Method not allowed"}`))
		}
	})

	// 卡密管理接口
	protectedMux.HandleFunc("/api/cardkeys", cardKeyHandler.Handle) // GET: 列表, POST: 创建
	protectedMux.HandleFunc("/api/cardkeys/batch", func(w http.ResponseWriter, r *http.Request) {
		switch r.Method {
		case http.MethodPost:
			cardKeyHandler.BatchCreate(w, r)
		case http.MethodDelete:
			cardKeyHandler.BatchDelete(w, r)
		default:
			w.Header().Set("Content-Type", "application/json")
			w.WriteHeader(http.StatusMethodNotAllowed)
			w.Write([]byte(`{"success":false,"message":"Method not allowed"}`))
		}
	})
	protectedMux.HandleFunc("/api/cardkeys/delete", cardKeyHandler.Delete)       // DELETE: 单个删除
	protectedMux.HandleFunc("/api/cardkeys/toggle", cardKeyHandler.ToggleActive) // POST: 切换激活状态

	// 挂载受保护的路由
	mux.Handle("/api/profile", middleware.AuthMiddleware(protectedMux))
	mux.Handle("/api/accounts", middleware.AuthMiddleware(protectedMux))
	mux.Handle("/api/accounts/", middleware.AuthMiddleware(protectedMux))
	mux.Handle("/api/invite", middleware.AuthMiddleware(protectedMux))
	mux.Handle("/api/cardkeys", middleware.AuthMiddleware(protectedMux))
	mux.Handle("/api/cardkeys/", middleware.AuthMiddleware(protectedMux))

	// 静态文件服务（前端）
	mux.Handle("/", static.Handler())

	// CORS 中间件包装
	return corsMiddleware(mux)
}

// corsMiddleware CORS 中间件
func corsMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")
		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")

		if r.Method == http.MethodOptions {
			w.WriteHeader(http.StatusOK)
			return
		}

		next.ServeHTTP(w, r)
	})
}

func itoa(i int) string {
	if i == 0 {
		return "0"
	}
	var s string
	for i > 0 {
		s = string(rune('0'+i%10)) + s
		i /= 10
	}
	return s
}