package auth

import (
	"net/http"
	"strings"

	"photum-backend/internal/config"

	"github.com/gin-gonic/gin"
)

func AuthMiddleware(cfg *config.Config) gin.HandlerFunc {
	return func(c *gin.Context) {
		authHeader := c.GetHeader("Authorization")
		var tokenString string

		if authHeader != "" {
			parts := strings.Split(authHeader, " ")
			if len(parts) == 2 && parts[0] == "Bearer" {
				tokenString = parts[1]
			} else if len(parts) == 1 && parts[0] != "" {
				tokenString = parts[0]
			} else {
				c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization header format"})
				return
			}
		} else {
			// Try to get from cookie
			cookie, err := c.Cookie("access_token")
			if err == nil && cookie != "" {
				tokenString = cookie
			} else {
				c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "authorization header required"})
				return
			}
		}
		claims, err := ValidateToken(tokenString, cfg.JwtAccessSecret)
		if err != nil {
			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid token"})
			return
		}

		c.Set("userID", claims.UserID.String())
		c.Set("role", claims.Role)
		c.Next()
	}
}

// RequireWriteAccess middleware to prevent AGENDA_VIEWER from modifying data
func RequireWriteAccess() gin.HandlerFunc {
	return func(c *gin.Context) {
		role := c.GetString("role")
		if role == "AGENDA_VIEWER" {
			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"error": "você não tem permissão para modificar dados"})
			return
		}
		c.Next()
	}
}

// RequireLogisticsAccess middleware to prevent AGENDA_VIEWER from accessing logistics
func RequireLogisticsAccess() gin.HandlerFunc {
	return func(c *gin.Context) {
		role := c.GetString("role")
		if role == "AGENDA_VIEWER" {
			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{"error": "você não tem permissão para acessar logística"})
			return
		}
		c.Next()
	}
}