package models

import (
	"log"
	"main/configs"
)

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

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

func (session *Session) Create() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("INSERT INTO sessions(name) values(?)")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	result, err := stmt.Exec(session.Name)
	if err != nil {
		log.Println(err)
		return err
	}
	id, err := result.LastInsertId()
	if err != nil {
		return err
	}
	session.ID = int(id)
	return nil
}

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

func (session *Session) Update() error {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return err
	}
	defer db.Close()
	stmt, err := db.Prepare("UPDATE sessions SET name = ? WHERE id = ?")
	if err != nil {
		log.Println(err)
		return err
	}
	defer stmt.Close()
	_, err = stmt.Exec(session.Name, session.ID)
	if err != nil {
		log.Println(err)
		return err
	}
	return nil
}

func GetSessions() ([]Session, error) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	defer db.Close()
	rows, err := db.Query("SELECT id, name FROM sessions")
	if err != nil {
		log.Println(err)
		return nil, err
	}
	defer rows.Close()
	sessions := []Session{}
	for rows.Next() {
		var session Session
		if err := rows.Scan(&session.ID, &session.Name); err != nil {
			log.Println(err)
			return nil, err
		}
		sessions = append(sessions, session)
	}
	return sessions, nil
}

func GetSession(id int) (*Session, error) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return nil, err
	}
	defer db.Close()
	row := db.QueryRow("SELECT id, name FROM sessions WHERE id = ?", id)
	var session Session
	if err := row.Scan(&session.ID, &session.Name); err != nil {
		log.Println(err)
		return nil, err
	}
	return &session, nil
}

func QuerySessions(page, pagesize int) (list []interface{}) {
	db, err := configs.GetDB()
	if err != nil {
		log.Println(err)
		return
	}
	defer db.Close()
	rows, err := db.Query("SELECT id, name FROM sessions LIMIT ?, ?", (page-1)*pagesize, pagesize)
	if err != nil {
		log.Println(err)
		return
	}
	defer rows.Close()
	for rows.Next() {
		var session Session
		if err := rows.Scan(&session.ID, &session.Name); err != nil {
			log.Println(err)
			return
		}
		list = append(list, session)
	}
	return
}

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