package model

import (
	"time"

	"gorm.io/gorm"
)

const CommentLengthLimit = 2000

type Comment struct {
	// db fields
	ID        uint `json:"id" gorm:"primarykey"`
	CreatedAt time.Time
	UpdatedAt time.Time
	DeletedAt gorm.DeletedAt `gorm:"index"`

	// db foreign key to reference parent post
	PostID uint

	Post     *Post  `json:"post"`
	Author   string `json:"author"`
	Contents string `json:"contents"`

	// db key to reference parent comment
	ReplyToID *uint

	ReplyTo *Comment   `json:"reply_to,omitempty"`
	Replies []*Comment `json:"replies" gorm:"many2many:comment_replies"`
}

type Post struct {
	// db fields
	ID        uint `json:"id" gorm:"primarykey"`
	CreatedAt time.Time
	UpdatedAt time.Time
	DeletedAt gorm.DeletedAt `gorm:"index"`

	Title         string     `json:"title"`
	Author        string     `json:"author"`
	Contents      string     `json:"contents"`
	Comments      []*Comment `json:"comments" gorm:"foreignKey:PostID"`
	AllowComments bool       `json:"allowComments"`
}

func PostFromInput(input *PostInput) *Post {
	return &Post{
		Author:        input.Author,
		Title:         input.Title,
		Contents:      input.Contents,
		AllowComments: input.AllowComments,
	}
}

func CommentFromInput(input *CommentInput) *Comment {
	return &Comment{
		Author:   input.Author,
		Contents: input.Contents,
		Replies:  make([]*Comment, 0),
	}
}