package router

import (
	"ai_scheduler/internal/config"
	errorcode "ai_scheduler/internal/data/error"
	errors "ai_scheduler/internal/data/error"
	"ai_scheduler/internal/middleware"
	"ai_scheduler/internal/pkg"
	"ai_scheduler/internal/services/advice"
	"encoding/json"
	"reflect"
	"strings"

	"github.com/go-playground/validator/v10"
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/websocket/v2"
)

// SetupRoutes 设置路由
func SetupRoutes(cfg *config.Config, app *fiber.App, adviceFile *advice.FileService, adviceData *advice.AdvicerService,
	adviceChat *advice.ChatService, adviceProject *advice.ProjectService, adviceTalkSkill *advice.TalkSkillService, adviceClient *advice.ClientService,
	industry *advice.IndustryService, admin *advice.AdminService, modelSup *advice.ModelSupService,
	activity *advice.ActivityService, wxHook *advice.WxHookService,
	smart *advice.SmartService,
	wxProxy *advice.WxProxyService,
	wsHub *advice.WxWsHub,
	adviceCustomer *advice.CustomerService,
) {
	app.Use(func(c *fiber.Ctx) error {
		// 设置 CORS 头
		c.Set("Access-Control-Allow-Origin", "*")
		c.Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
		c.Set("Access-Control-Allow-Headers", "Content-Type, Authorization, X-finder-TOKEN")

		// AI能力调用路由，设置不同的 CORS 头
		if strings.HasPrefix(c.Path(), "/api/v1/capability") {
			c.Set("Access-Control-Allow-Headers", "Content-Type, X-Source-Key, X-Timestamp")
		}

		// 如果是预检请求（OPTIONS），直接返回 204
		if c.Method() == "OPTIONS" {
			return c.SendStatus(fiber.StatusNoContent) // 204
		}

		// 继续处理后续中间件或路由
		return c.Next()
	})

	r := app.Group("api/v1/")
	registerResponse(r)
	r.Get("/health", func(c *fiber.Ctx) error {
		c.Response().SetBody([]byte("1"))
		return nil
	})

	// 微信代理路由已移至管理后台路由组内（JWT 鉴权 + 标准响应包装）

	// WebSocket 实时通信端点（不走 JWT 中间件，Hub 内自行验证 token）
	r.Get("advicer/ws", websocket.New(wsHub.WsHandler))

	// 个人微信消息回调入口：/api/v1/advicer/wx/callback（上游调用，无 JWT，回调 token 校验在服务内完成）
	r.Post("advicer/wx/callback", wxHook.Callback)

	// 管理后台路由（需要登录）: /api/v1/admin/...
	adminR := r.Group("admin")
	// 登录接口放行，其余接口校验 JWT 登录态
	adminR.Use(middleware.AuthMiddleware(cfg.JwtSecret, "/api/v1/admin/advice/admin/login"))
	AdvicerRouterRegist(
		cfg,
		adminR,
		adviceFile,
		adviceData,
		adviceChat,
		adviceProject,
		adviceTalkSkill,
		adviceClient,
		industry,
		admin,
		modelSup,
		activity,
		wxHook,
		smart,
		wxProxy,
		adviceCustomer,
	)

}

func registerResponse(router fiber.Router) {
	// 自定义返回
	router.Use(func(c *fiber.Ctx) error {
		err := c.Next()
		return registerCommon(c, err)
	})

}

func registerCommon(c *fiber.Ctx, err error) error {
	// 调用下一个中间件或路由处理函数
	if c.Path() == "/api/v1/qywx/callback" {
		return nil
	}

	// 如果有错误发生
	if err != nil {
		bsErr, ok := err.(*errors.BusinessErr)
		if !ok {
			bsErr = errorcode.SysErr(err.Error())
		}
		// 返回自定义错误响应
		return c.JSON(fiber.Map{
			"message": bsErr.Error(),
			"code":    bsErr.Code(),
			"data":    nil,
		})
	}
	contentType := strings.ToLower(string(c.Response().Header.Peek("Content-Type")))
	if strings.Contains(strings.ToLower(contentType), "text/event-stream") {
		// 是 SSE 请求
		return c.SendString("这是 SSE 请求")
	}

	body := c.Response().Body()
	if c.Locals("skip_response_wrap") == true {
		// handler 已自行写入原始 JSON（如微信代理透传上游 data），原样输出不做包装
		c.Set(fiber.HeaderContentType, fiber.MIMEApplicationJSONCharsetUTF8)
		return c.Send(body)
	}
	var rawData json.RawMessage
	if len(body) > 0 {
		if err := json.Unmarshal(body, &rawData); err != nil {
			// 解析失败，作为字符串包装成JSON
			rawData = json.RawMessage(`"` + strings.ReplaceAll(string(body), `"`, `\"`) + `"`)
		}
	}
	return c.JSON(fiber.Map{
		"data":    rawData,
		"message": errors.Success.Error(),
		"code":    errors.Success.Code(),
	})
}

// validateInst 全局复用 validator 实例（线程安全，避免每次请求重复创建）
var validateInst = func() *validator.Validate {
	v := validator.New()
	v.RegisterTagNameFunc(func(fld reflect.StructField) string {
		name := fld.Tag.Get("zh")
		if name == "" {
			name = fld.Tag.Get("json")
		}
		return name
	})
	return v
}()

func Vali[T any](handler func(*fiber.Ctx, *T) error, _ *T) fiber.Handler {
	return func(c *fiber.Ctx) error {
		var data T

		// 解析请求
		if err := c.BodyParser(&data); err != nil {
			return errorcode.ParamErr(err.Error())
		}

		// 验证
		if err := validateInst.Struct(&data); err != nil {
			if ve, ok := err.(validator.ValidationErrors); ok {
				er := make([]string, len(ve))
				for k, e := range ve {
					er[k] = pkg.GetErr(e.Tag(), e.Field(), e.Param())
				}
				return errorcode.ParamErr(strings.Join(er, ","))
			}
			return errorcode.ParamErr(err.Error())
		}

		return handler(c, &data)
	}
}