package main

import (
	"context"
	"log"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"
)

func init() {
	log.Println("db.go loading..")
	var err error

	app.db, err = pgx.Connect(context.Background(), config.GetString("db.connstring"))
	if err != nil {
		log.Fatal(err)
	}
	log.Println("db.go done.")
}

type Playlist struct {
	Id    uuid.UUID
	Url   string
	Title string
}

func (app App) GetPlaylists() (playlists []Playlist, err error) {
	rows, err := app.db.Query(context.Background(), "SELECT id, url, title FROM playlists")
	if err != nil {
		return nil, err
	}

	playlists, err = pgx.CollectRows(rows, pgx.RowToStructByName[Playlist])
	return
}

func (app App) GetPlaylist(id uuid.UUID) (*Playlist, error) {
	rows, err := app.db.Query(context.Background(), "SELECT id, url, title FROM playlists where id=$1 limit 1", id)
	if err != nil {
		return nil, err
	}

	//var out Playlist
	out, err := pgx.CollectOneRow(rows, pgx.RowToAddrOfStructByName[Playlist])
	if err != nil {
		return new(Playlist), err
	}

	return out, nil
}

func (app App) AddPlaylist(title string, uri string) (uuid.UUID, error) {
	id := uuid.New()
	_, err := app.db.Exec(context.Background(), "INSERT INTO playlists VALUES ($1, $2, $3)", id, title, uri)
	if err != nil {
		return *new(uuid.UUID), err
	}
	return id, nil
}