// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package model

import (
	"net/http"
	"regexp"
)

type Reaction struct {
	UserId    string  `json:"user_id" xml:"UserId"`
	PostId    string  `json:"post_id" xml:"PostId"`
	EmojiName string  `json:"emoji_name" xml:"EmojiName"`
	CreateAt  int64   `json:"create_at" xml:"CreateAt"`
	UpdateAt  int64   `json:"update_at" xml:"UpdateAt"`
	DeleteAt  int64   `json:"delete_at" xml:"DeleteAt"`
	RemoteId  *string `json:"remote_id" xml:"RemoteId"`
	ChannelId string  `json:"channel_id" xml:"ChannelId"`
}

func (o *Reaction) IsValid() *AppError {
	if !IsValidId(o.UserId) {
		return NewAppError("Reaction.IsValid", "model.reaction.is_valid.user_id.app_error", nil, "user_id="+o.UserId, http.StatusBadRequest)
	}

	if !IsValidId(o.PostId) {
		return NewAppError("Reaction.IsValid", "model.reaction.is_valid.post_id.app_error", nil, "post_id="+o.PostId, http.StatusBadRequest)
	}

	validName := regexp.MustCompile(`^[a-zA-Z0-9\-\+_]+$`)

	if o.EmojiName == "" || len(o.EmojiName) > EmojiNameMaxLength || !validName.MatchString(o.EmojiName) {
		return NewAppError("Reaction.IsValid", "model.reaction.is_valid.emoji_name.app_error", nil, "emoji_name="+o.EmojiName, http.StatusBadRequest)
	}

	if o.CreateAt == 0 {
		return NewAppError("Reaction.IsValid", "model.reaction.is_valid.create_at.app_error", nil, "", http.StatusBadRequest)
	}

	if o.UpdateAt == 0 {
		return NewAppError("Reaction.IsValid", "model.reaction.is_valid.update_at.app_error", nil, "", http.StatusBadRequest)
	}

	return nil
}

func (o *Reaction) PreSave() {
	if o.CreateAt == 0 {
		o.CreateAt = GetMillis()
	}
	o.UpdateAt = GetMillis()
	o.DeleteAt = 0

	if o.RemoteId == nil {
		o.RemoteId = new("")
	}
}

func (o *Reaction) PreUpdate() {
	o.UpdateAt = GetMillis()

	if o.RemoteId == nil {
		o.RemoteId = new("")
	}
}

func (o *Reaction) GetRemoteID() string {
	if o.RemoteId == nil {
		return ""
	}
	return *o.RemoteId
}