package api

import (
	"net/http"
	"os"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/openteam/server/internal/api/middleware"
	"github.com/openteam/server/internal/app"
	"github.com/openteam/server/internal/proxy"
)

// NewRouter 装配所有路由：
//   - /v1/*        代理端点（Bearer API Key，OpenAI 格式错误体）
//   - /api/v1/*    管理 API（会话 JWT）
func NewRouter(a *app.App, gw *proxy.Gateway) *gin.Engine {
	if a.Cfg.Env == "production" {
		gin.SetMode(gin.ReleaseMode)
	}
	r := gin.New()
	r.Use(gin.Logger(), gin.Recovery(), middleware.CORS())

	h := NewHandler(a)

	// --- 代理端点（对外）---
	proxyGroup := r.Group("/v1")
	{
		proxyGroup.Any("/chat/completions", gw.Auth, gw.Handle)
		proxyGroup.Any("/responses", gw.Auth, gw.Handle)
		proxyGroup.Any("/messages", gw.Auth, gw.Handle)
		proxyGroup.Any("/models", gw.Auth, gw.Handle)
	}
	// 静态资源（前端构建产物，存在时托管）
	const dist = "web/dist"
	if _, err := os.Stat(dist); err == nil {
		r.Static("/assets", dist+"/assets")
		r.StaticFile("/favicon.svg", dist+"/favicon.svg")
	}

	// 未匹配路由：/v1/* 走代理鉴权；其余回退 SPA 或 404
	r.NoRoute(func(c *gin.Context) {
		if strings.HasPrefix(c.Request.URL.Path, "/v1") {
			gw.Auth(c)
			if !c.IsAborted() {
				gw.Handle(c)
			}
			return
		}
		if _, err := os.Stat(dist); err == nil {
			c.File(dist + "/index.html")
			return
		}
		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
	})

	// --- 管理 API ---
	api := r.Group("/api/v1")
	{
		auth := api.Group("/auth")
		{
			auth.POST("/register", h.Register)
			auth.POST("/login", h.Login)
			auth.POST("/refresh", h.Refresh)
			auth.POST("/logout", h.Logout)
			auth.GET("/me", middleware.SessionAuth(a), h.Me)
		}

		user := api.Group("", middleware.SessionAuth(a))
		{
			user.GET("/user/profile", h.UserProfile)
			user.GET("/user/balance", h.UserBalance)
			user.GET("/user/models", h.UserModels)
			user.GET("/usage/summary", h.UsageSummary)
			user.GET("/usage/stats", h.UsageStats)
			user.GET("/usage/logs", h.UsageLogs)
			user.POST("/keys", h.CreateKey)
			user.GET("/keys", h.ListKeys)
			user.PATCH("/keys/:id", h.PatchKey)
			user.DELETE("/keys/:id", h.DeleteKey)
		}

		admin := api.Group("/admin", middleware.SessionAuth(a), middleware.AdminOnly)
		{
			// 用户
			admin.GET("/users", h.AdminUsers)
			admin.PATCH("/users/:id", h.AdminPatchUser)
			admin.POST("/users/:id/balance", h.AdminAdjustBalance)
			// 渠道
			admin.GET("/channels", h.AdminChannels)
			admin.POST("/channels", h.AdminCreateChannel)
			admin.PUT("/channels/:id", h.AdminUpdateChannel)
			admin.DELETE("/channels/:id", h.AdminDeleteChannel)
			admin.POST("/channels/:id/test", h.AdminTestChannel)
			admin.POST("/channels/:id/models/import", h.AdminImportChannelModels)
			admin.GET("/channels/:id/favicon", h.AdminChannelFavicon)
			// 模型与定价
			admin.GET("/models", h.AdminModels)
			admin.POST("/models", h.AdminCreateModel)
			admin.PUT("/models/:id", h.AdminUpdateModel)
			admin.DELETE("/models/:id", h.AdminDeleteModel)
			admin.POST("/models/:id/bindings", h.AdminCreateModelBinding)
			admin.DELETE("/models/:id/bindings/:bid", h.AdminDeleteModelBinding)
			// 统计与用量
			admin.GET("/stats/overview", h.AdminStatsOverview)
			admin.GET("/usage", h.AdminUsage)
			// 配置
			admin.GET("/config", h.AdminConfig)
			admin.PUT("/config", h.AdminPutConfig)
			// 充值审核（M6 预留）
		}
	}

	r.GET("/healthz", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"status": "ok"})
	})
	return r
}