package router

import (
	"net/http"
	"net/http/httputil"
	"net/url"
	"strings"

	"github.com/basketikun/infinite-canvas/handler"
	"github.com/basketikun/infinite-canvas/middleware"
	"github.com/gin-gonic/gin"
)

const webBaseURL = "http://127.0.0.1:3001"

func New() *gin.Engine {
	router := gin.Default()
	router.RedirectTrailingSlash = false
	_ = router.SetTrustedProxies(nil)
	api := router.Group("/api")
	api.GET("/health", func(c *gin.Context) {
		c.String(http.StatusOK, "ok")
	})
	api.POST("/auth/register", gin.WrapF(handler.Register))
	api.POST("/auth/login", gin.WrapF(handler.Login))
	api.GET("/auth/me", middleware.OptionalAuth, gin.WrapF(handler.CurrentUser))
	api.GET("/prompts", middleware.OptionalAuth, gin.WrapF(handler.Prompts))
	api.GET("/assets", middleware.OptionalAuth, gin.WrapF(handler.Assets))
	api.POST("/admin/login", gin.WrapF(handler.AdminLogin))

	admin := api.Group("/admin", middleware.AdminAuth)
	admin.GET("/users", gin.WrapF(handler.AdminUsers))
	admin.POST("/users", gin.WrapF(handler.AdminSaveUser))
	admin.DELETE("/users/:id", func(c *gin.Context) {
		handler.AdminDeleteUser(c.Writer, c.Request, c.Param("id"))
	})
	admin.GET("/prompt-categories", gin.WrapF(handler.AdminPromptCategories))
	admin.POST("/prompt-categories/sync", gin.WrapF(handler.AdminSyncPromptCategories))
	admin.GET("/prompts", gin.WrapF(handler.AdminPrompts))
	admin.POST("/prompts", gin.WrapF(handler.AdminSavePrompt))
	admin.DELETE("/prompts/:id", func(c *gin.Context) {
		handler.AdminDeletePrompt(c.Writer, c.Request, c.Param("id"))
	})
	admin.GET("/assets", gin.WrapF(handler.AdminAssets))
	admin.POST("/assets", gin.WrapF(handler.AdminSaveAsset))
	admin.DELETE("/assets/:id", func(c *gin.Context) {
		handler.AdminDeleteAsset(c.Writer, c.Request, c.Param("id"))
	})

	webURL, _ := url.Parse(webBaseURL)
	webProxy := httputil.NewSingleHostReverseProxy(webURL)
	router.NoRoute(func(c *gin.Context) {
		path := c.Request.URL.Path
		if path == "/api" || strings.HasPrefix(path, "/api/") {
			middleware.NotFoundJSON(c)
			return
		}
		webProxy.ServeHTTP(c.Writer, c.Request)
	})

	return router
}