package models

import (
	"log"
	"main/configs"
)

type Tag struct {
	ID        int    `json:"id"`
	Name      string `json:"name"`
	CreatedAt string `json:"created_at"`
	UpdatedAt string `json:"updated_at"`
}

func (tag *Tag) Create(name string) error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("INSERT INTO tags(name, created_at, updated_at) values(?, ?, ?)")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	result, err := stmt.Exec(name, tag.CreatedAt, tag.UpdatedAt)
	if err != nil {
		log.Println(err)
		return err
	}
	id, err := result.LastInsertId()
	if err != nil {
		return err
	}
	tag.ID = int(id)
	return nil
}

func (tag *Tag) Delete() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("DELETE FROM tags WHERE id = ?")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	_, err = stmt.Exec(tag.ID)
	if err != nil {
		log.Println(err)
		return err
	}
	return nil
}

func (tag *Tag) Update(name string) error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("UPDATE tags SET name = ?, updated_at = ? WHERE id = ?")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	_, err = stmt.Exec(name, tag.UpdatedAt, tag.ID)
	if err != nil {
		log.Println(err)
		return err
	}
	return nil
}

func (tag *Tag) Get() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	err = db.QueryRow("SELECT * FROM tags WHERE id = ?", tag.ID).Scan(&tag.ID, &tag.Name, &tag.CreatedAt, &tag.UpdatedAt)
	if err != nil {
		log.Println(err)
		return err
	}
	return nil
}

func GetTags() ([]Tag, error) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	defer db.Close()
	rows, err := db.Query("SELECT * FROM tags")
	if err != nil {
		log.Println(err)
		return nil, err
	}
	defer rows.Close()
	var tags []Tag
	for rows.Next() {
		var tag Tag
		err := rows.Scan(&tag.ID, &tag.Name, &tag.CreatedAt, &tag.UpdatedAt)
		if err != nil {
			log.Println(err)
			return nil, err
		}
		tags = append(tags, tag)
	}
	return tags, nil
}

func GetTag(id int) (*Tag, error) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	defer db.Close()
	row := db.QueryRow("SELECT * FROM tags WHERE id = ?", id)
	var tag Tag
	err = row.Scan(&tag.ID, &tag.Name, &tag.CreatedAt, &tag.UpdatedAt)
	if err != nil {
		log.Println(err)
		return nil, err
	}
	return &tag, nil
}

func GetTagByName(name string) (*Tag, error) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	defer db.Close()
	row := db.QueryRow("SELECT * FROM tags WHERE name = ?", name)
	var tag Tag
	err = row.Scan(&tag.ID, &tag.Name, &tag.CreatedAt, &tag.UpdatedAt)
	if err != nil {
		log.Println(err)
		return nil, err
	}
	return &tag, nil
}

func QueryTags(page, pagesize int) (list []interface{}) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return nil
	}
	defer db.Close()
	rows, err := db.Query("SELECT * FROM tags LIMIT ?, ?", page, pagesize)
	if err != nil {
		log.Println(err)
		return nil
	}
	defer rows.Close()
	for rows.Next() {
		var tag Tag
		err := rows.Scan(&tag.ID, &tag.Name, &tag.CreatedAt, &tag.UpdatedAt)
		if err != nil {
			log.Println(err)
			return nil
		}
		list = append(list, tag)
	}
	return list
}

func CountTags() (count int) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return 0
	}
	defer db.Close()
	row := db.QueryRow("SELECT COUNT(*) FROM tags")
	err = row.Scan(&count)
	if err != nil {
		log.Println(err)
		return 0
	}
	return count
}