package mail

import (
	"strings"

	mailModel "dove/models/mail"
	mailRepo "dove/repositories/mail"
	"dove/utils/meta"
	"dove/utils/shortcuts"
)

type CreateUserRequest struct {
	Username    string `form:"username"`
	DisplayName string `form:"display_name"`
}

type UpdateUserRequest struct {
	DisplayName string `form:"display_name"`
}

type EditUserFormResponse struct {
	User mailModel.User `json:"user"`
}

func ListUsers(pagination meta.Pagination, sorting meta.Sorting, search string) meta.PaginatedResponse {
	users, total := mailRepo.ListUsers(pagination, sorting, search)
	return pagination.Response(users, total)
}

func CreateUser(request CreateUserRequest) *shortcuts.Error {
	username := strings.TrimSpace(request.Username)
	displayName := strings.TrimSpace(request.DisplayName)

	if username == "" {
		return shortcuts.ServiceError(shortcuts.BadRequest, UsernameRequired)
	}

	if displayName == "" {
		return shortcuts.ServiceError(shortcuts.BadRequest, DisplayNameRequired)
	}

	if mailRepo.FindUserByUsername(username) != nil {
		return shortcuts.ServiceError(shortcuts.Unprocessable, UserAlreadyExists)
	}

	newUser := &mailModel.User{
		Username:    username,
		DisplayName: displayName,
	}

	if createError := mailRepo.CreateUser(newUser); createError != nil {
		return shortcuts.ServiceError(shortcuts.Internal, UserCreationFailed)
	}

	return nil
}

func EditUserFormData(userID uint) (*EditUserFormResponse, *shortcuts.Error) {
	user := mailRepo.FindUserByID(userID)
	if user == nil {
		return nil, shortcuts.ServiceError(shortcuts.NotFound, UserNotFound)
	}

	return &EditUserFormResponse{User: *user}, nil
}

func UpdateUser(userID uint, request UpdateUserRequest) *shortcuts.Error {
	user := mailRepo.FindUserByID(userID)
	if user == nil {
		return shortcuts.ServiceError(shortcuts.NotFound, UserNotFound)
	}

	displayName := strings.TrimSpace(request.DisplayName)
	if displayName == "" {
		return shortcuts.ServiceError(shortcuts.BadRequest, DisplayNameRequired)
	}

	user.DisplayName = displayName

	if updateError := mailRepo.UpdateUser(user); updateError != nil {
		return shortcuts.ServiceError(shortcuts.Internal, UserUpdateFailed)
	}

	return nil
}

func DeleteUser(userID uint) *shortcuts.Error {
	user := mailRepo.FindUserByID(userID)
	if user == nil {
		return shortcuts.ServiceError(shortcuts.NotFound, UserNotFound)
	}

	if mailRepo.CountMailboxesByUserID(user.ID) > 0 {
		return shortcuts.ServiceError(shortcuts.Unprocessable, UserHasMailboxes)
	}

	if deleteError := mailRepo.DeleteUser(user); deleteError != nil {
		return shortcuts.ServiceError(shortcuts.Internal, UserDeletionFailed)
	}

	return nil
}

func AllUsers() []mailModel.User {
	return mailRepo.AllUsers()
}