package http

import (
	"github.com/aykhans/oh-my-chat/internal/core/port"
	"github.com/go-playground/validator/v10"
	"github.com/gofiber/fiber/v2"
)

type AuthHandler struct {
	authService port.AuthService
	validator   *validator.Validate
}

func NewAuthHandler(authService port.AuthService, validator *validator.Validate) *AuthHandler {
	return &AuthHandler{authService, validator}
}

type loginRequest struct {
	Username string `json:"username"`
	Email    string `json:"email" validate:"email"`
	Password string `json:"password" validate:"required"`
}

func (authHandler *AuthHandler) Login(ctx *fiber.Ctx) error {
	loginBody := new(loginRequest)
	if err := ctx.BodyParser(loginBody); err != nil {
		return invalidRequestBodyResponse(ctx)
	}

	if err := authHandler.validator.Struct(loginBody); err != nil {
		return validationErrorResponse(ctx, err)
	}

	loginField := loginBody.Email
	loginFunc := authHandler.authService.LoginByEmail
	if loginField == "" {
		if loginBody.Username == "" {
			return fiber.NewError(fiber.StatusBadRequest, "email or username is required")
		}
		loginField = loginBody.Username
		loginFunc = authHandler.authService.LoginByUsername
	}

	serviceCtx := ctx.Context()
	token, err := loginFunc(serviceCtx, loginField, loginBody.Password)
	if err != nil {
		return fiber.NewError(fiber.StatusUnauthorized, err.Error())
	}
	return ctx.JSON(fiber.Map{"token": token})
}