package handlers

import (
	"net/http"

	"erp-mvp/core-service/internal/models"
	"erp-mvp/core-service/internal/service"
	"github.com/gin-gonic/gin"
	"github.com/go-playground/validator/v10"
)

type AuthHandler struct {
	authService service.AuthService
	validate    *validator.Validate
}

func NewAuthHandler(authService service.AuthService) *AuthHandler {
	return &AuthHandler{
		authService: authService,
		validate:    validator.New(),
	}
}

// Register регистрация новой организации и пользователя
func (h *AuthHandler) Register(c *gin.Context) {
	var req models.RegisterRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
		return
	}

	// Валидируем запрос
	if err := h.validate.Struct(req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
		return
	}

	// Выполняем регистрацию
	response, err := h.authService.Register(c.Request.Context(), &req)
	if err != nil {
		if validationErr, ok := err.(*service.ValidationError); ok {
			c.JSON(http.StatusBadRequest, gin.H{"error": validationErr.Message})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Registration failed"})
		return
	}

	c.JSON(http.StatusCreated, response)
}

// Login вход в систему
func (h *AuthHandler) Login(c *gin.Context) {
	var req models.LoginRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request body"})
		return
	}

	// Валидируем запрос
	if err := h.validate.Struct(req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Validation failed", "details": err.Error()})
		return
	}

	// Выполняем вход
	response, err := h.authService.Login(c.Request.Context(), &req)
	if err != nil {
		if validationErr, ok := err.(*service.ValidationError); ok {
			c.JSON(http.StatusUnauthorized, gin.H{"error": validationErr.Message})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Login failed"})
		return
	}

	c.JSON(http.StatusOK, response)
}