package database

import (
	"database/sql"
	"fmt"
	"time"

	"github.com/russross/blackfriday/v2"
)

type Post struct {
	ID               int
	Title            string `db:"post_title"`
	Content          string
	Date             string
	MarkdownContent  string         `db:"markdown_content"`
	GemtextContent   sql.NullString `db:"gemtext_content"`
	TitleSlug        string         `db:"title_slug"`
	Year, Month, Day int
}

func (p *Post) GemtextPage() string {
	return fmt.Sprintf("# %s\n\n", p.Title) + p.GemtextContent.String + "\n\n" + p.Date

}

func (p *Post) HTMLPage() string {
	extensions := blackfriday.CommonExtensions | blackfriday.HardLineBreak
	result := fmt.Sprintf("<h1>%s</h1>\n%s", p.Title, blackfriday.Run([]byte(p.MarkdownContent), blackfriday.WithExtensions(extensions)))
	result += fmt.Sprintf("%s", p.Date)
	return result
}

func GetPost(id int) (*Post, error) {
	db := GetDB()
	post := &Post{}
	err := db.Get(post, "SELECT id, post_title, date, markdown_content, gemtext_content, title_slug, year, month, day FROM posts WHERE id = ? and gemtext_content is not null", id)
	if err != nil {
		return nil, err
	}
	return post, nil
}

func UpdatePost(p *Post) error {
	db := GetDB()
	_, err := db.Exec("UPDATE posts SET post_title = ?, markdown_content = ?, gemtext_content = ?, title_slug = ?, year = ?, month = ?, day = ? WHERE id = ?", p.Title, p.MarkdownContent, p.GemtextContent, p.TitleSlug, p.Year, p.Month, p.Day, p.ID)
	if err != nil {
		return err
	}
	return nil
}

func CreateNewPost() (*Post, error) {
	db := GetDB()
	day := time.Now().Day()
	month := time.Now().Month()
	year := time.Now().Year()

	result, err := db.Exec("INSERT INTO posts (post_title, markdown_content, gemtext_content, title_slug, year, month, day) VALUES (?, ?, ?, ?, ?, ?, ?)", "Novi Clanak", "", "", "new-post", year, month, day)
	if err != nil {
		return nil, err
	}
	postID, err := result.LastInsertId()
	if err != nil {
		return nil, err
	}
	post, err := GetPost(int(postID))
	if err != nil {
		return nil, err
	}
	return post, nil
}