package middleware

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

	"github.com/gin-gonic/gin"

	"aimodels-prices/models"
)

func AuthRequired() gin.HandlerFunc {
	return func(c *gin.Context) {
		cookie, err := c.Cookie("session")
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Not logged in"})
			c.Abort()
			return
		}

		db := c.MustGet("db").(*sql.DB)
		var session models.Session
		err = db.QueryRow("SELECT id, user_id, expires_at, created_at, updated_at, deleted_at FROM session WHERE id = ?", cookie).Scan(
			&session.ID, &session.UserID, &session.ExpiresAt, &session.CreatedAt, &session.UpdatedAt, &session.DeletedAt)
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid session"})
			c.Abort()
			return
		}

		if session.ExpiresAt.Before(time.Now()) {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Session expired"})
			c.Abort()
			return
		}

		user, err := session.GetUser(db)
		if err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get user"})
			c.Abort()
			return
		}

		c.Set("user", user)
		c.Next()
	}
}

func AdminRequired() gin.HandlerFunc {
	return func(c *gin.Context) {
		user, exists := c.Get("user")
		if !exists {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Not logged in"})
			c.Abort()
			return
		}

		if u, ok := user.(*models.User); !ok || u.Role != "admin" {
			c.JSON(http.StatusForbidden, gin.H{"error": "Admin access required"})
			c.Abort()
			return
		}

		c.Next()
	}
}

func RequireAuth() gin.HandlerFunc {
	return func(c *gin.Context) {
		_, exists := c.Get("user")
		if !exists {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authentication required"})
			c.Abort()
			return
		}
		c.Next()
	}
}

func RequireAdmin() gin.HandlerFunc {
	return func(c *gin.Context) {
		user, exists := c.Get("user")
		if !exists {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authentication required"})
			c.Abort()
			return
		}

		if u, ok := user.(*models.User); !ok || u.Role != "admin" {
			c.JSON(http.StatusForbidden, gin.H{"error": "Admin access required"})
			c.Abort()
			return
		}
		c.Next()
	}
}