package server

import (
	"context"
	"net/http"
	"strconv"
	"time"

	"github.com/gin-gonic/gin"

	"autostore/internal/application/interfaces"
	"autostore/internal/presentation/controllers"
	"autostore/internal/presentation/middleware"
)

type Server struct {
	config        *Config
	logger        interfaces.ILogger
	itemsCtrl     *controllers.ItemsController
	authCtrl      *controllers.AuthController
	jwtMiddleware *middleware.JWTMiddleware
	httpServer    *http.Server
}

type Config struct {
	Port            int
	ReadTimeout     time.Duration
	WriteTimeout    time.Duration
	ShutdownTimeout time.Duration
}

func NewServer(
	config *Config,
	logger interfaces.ILogger,
	itemsCtrl *controllers.ItemsController,
	authCtrl *controllers.AuthController,
	jwtMiddleware *middleware.JWTMiddleware,
) *Server {
	return &Server{
		config:        config,
		logger:        logger,
		itemsCtrl:     itemsCtrl,
		authCtrl:      authCtrl,
		jwtMiddleware: jwtMiddleware,
	}
}

func (s *Server) Start() error {
	gin.SetMode(gin.ReleaseMode)
	router := s.SetupRoutes()

	s.httpServer = &http.Server{
		Addr:         ":" + strconv.Itoa(s.config.Port),
		Handler:      router,
		ReadTimeout:  s.config.ReadTimeout,
		WriteTimeout: s.config.WriteTimeout,
	}

	s.logger.Info(context.Background(), "Server starting on port %d", s.config.Port)
	return s.httpServer.ListenAndServe()
}

func (s *Server) Shutdown(ctx context.Context) error {
	s.logger.Info(ctx, "Server shutting down")

	shutdownCtx, cancel := context.WithTimeout(ctx, s.config.ShutdownTimeout)
	defer cancel()

	return s.httpServer.Shutdown(shutdownCtx)
}

func (s *Server) SetupRoutes() *gin.Engine {
	router := gin.New()

	// Middleware
	router.Use(gin.Recovery())
	router.Use(s.corsMiddleware())

	// Health check
	router.GET("/health", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"status": "ok"})
	})

	// API v1 group
	v1 := router.Group("/api/v1")

	// Auth routes (no JWT middleware)
	v1.POST("/login", s.authCtrl.Login)

	// Items routes (with JWT middleware)
	items := v1.Group("/items")
	items.Use(s.jwtMiddleware.Middleware())
	{
		items.POST("", s.itemsCtrl.CreateItem)
		items.GET("", s.itemsCtrl.ListItems)
		items.GET("/:id", s.itemsCtrl.GetItem)
		items.DELETE("/:id", s.itemsCtrl.DeleteItem)
	}

	return router
}

func (s *Server) corsMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Header("Access-Control-Allow-Origin", "*")
		c.Header("Access-Control-Allow-Credentials", "true")
		c.Header("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
		c.Header("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE")

		if c.Request.Method == "OPTIONS" {
			c.AbortWithStatus(204)
			return
		}

		c.Next()
	}
}