package auth

import "github.com/gofiber/fiber/v2"

type Handler struct {
	svc *Service
}

func NewHandler(svc *Service) *Handler {
	return &Handler{svc: svc}
}

func (h *Handler) Login(c *fiber.Ctx) error {
	var req struct {
		Username string `json:"username"`
		Password string `json:"password"`
	}
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "잘못된 요청입니다"})
	}
	if req.Username == "" || req.Password == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "아이디와 비밀번호를 입력해주세요"})
	}

	tokenStr, user, err := h.svc.Login(req.Username, req.Password)
	if err != nil {
		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{"error": err.Error()})
	}

	return c.JSON(fiber.Map{
		"token":    tokenStr,
		"username": user.Username,
		"role":     user.Role,
	})
}

func (h *Handler) Logout(c *fiber.Ctx) error {
	userID := c.Locals("userID").(uint)
	h.svc.Logout(userID)
	return c.JSON(fiber.Map{"message": "로그아웃 되었습니다"})
}

func (h *Handler) GetAllUsers(c *fiber.Ctx) error {
	users, err := h.svc.GetAllUsers()
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "유저 목록을 불러오지 못했습니다"})
	}
	return c.JSON(users)
}

func (h *Handler) UpdateRole(c *fiber.Ctx) error {
	var body struct {
		Role string `json:"role"`
	}
	if err := c.BodyParser(&body); err != nil || (body.Role != "admin" && body.Role != "user") {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "role은 admin 또는 user여야 합니다"})
	}
	if err := h.svc.UpdateRole(c.Params("id"), Role(body.Role)); err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "권한 변경에 실패했습니다"})
	}
	return c.JSON(fiber.Map{"message": "권한이 변경되었습니다"})
}

func (h *Handler) DeleteUser(c *fiber.Ctx) error {
	if err := h.svc.DeleteUser(c.Params("id")); err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "유저 삭제에 실패했습니다"})
	}
	return c.SendStatus(fiber.StatusNoContent)
}