package main

import (
	"arimelody.me/arimelody.me/api/v1/music"

	"fmt"
	"os"
	"time"

	"github.com/jmoiron/sqlx"
	_ "github.com/lib/pq"
)

func PushArtist(db *sqlx.DB, artist music.Artist) {
    fmt.Printf("pushing artist [%s] to database...", artist.Name)

    db.MustExec("INSERT INTO artists (id, name, website) VALUES ($1, $2, $3) ON CONFLICT (id) DO UPDATE SET name=$2, website=$3", 
        &artist.Id,
        &artist.Name,
        &artist.Website,
    )

    fmt.Printf("done!\n")
}

func PullAllArtists(db *sqlx.DB) ([]*music.Artist, error) {
    artists := []*music.Artist{}

    rows, err := db.Query("SELECT id, name, website FROM artists")
    if err != nil {
        return nil, err
    }

    for rows.Next() {
        var artist = music.Artist{}
        err = rows.Scan(&artist.Id, &artist.Name, &artist.Website)
        if err != nil {
            return nil, err
        }
        artists = append(artists, &artist)
    }

    return artists, nil
}

func PullArtist(db *sqlx.DB, artistID string) (music.Artist, error) {
    artist := music.Artist{}

    err := db.Get(&artist, "SELECT id, name, website FROM artists WHERE id=$1", artistID)
    if err != nil {
        return music.Artist{}, err
    }

    return artist, nil
}

func PushRelease(db *sqlx.DB, release music.MusicRelease) {
        fmt.Printf("pushing release [%s] to database...", release.Id)

        tx := db.MustBegin()
        tx.MustExec("INSERT INTO musicreleases (id, title, type, release_date, artwork, buyname, buylink) VALUES ($1, $2, $3, $4, $5, $6, $7) "+
        "ON CONFLICT (id) DO UPDATE SET title=$2, type=$3, release_date=$4, artwork=$5, buyname=$6, buylink=$7",
        &release.Id, &release.Title, &release.Type, release.ReleaseDate.Format("2-Jan-2006"), &release.Artwork, &release.Buyname, &release.Buylink)

        for _, link := range release.Links {
                tx.MustExec("INSERT INTO musiclinks (release, name, url) VALUES ($1, $2, $3) ON CONFLICT (release, name) DO UPDATE SET url=$3",
                &release.Id, &link.Name, &link.Url)
        }
        for _, credit := range release.Credits {
                tx.MustExec("INSERT INTO musiccredits (release, artist, role, is_primary) VALUES ($1, $2, $3, $4) ON CONFLICT DO NOTHING",
                &release.Id, &credit.Artist.Id, &credit.Role, &credit.Primary)
        }
        for _, track := range release.Tracks {
                tx.MustExec("INSERT INTO musictracks (release, number, title, description, lyrics, preview_url) VALUES ($1, $2, $3, $4, $5, $6) "+
                "ON CONFLICT (release, number) DO UPDATE SET title=$3, description=$4, lyrics=$5, preview_url=$6",
                &release.Id, &track.Number, &track.Title, &track.Description, &track.Lyrics, &track.PreviewUrl)
        }

        tx.Commit()

        fmt.Printf("done!\n")
}

func PullAllReleases(db *sqlx.DB) ([]*music.MusicRelease, error) {
    releases := []*music.MusicRelease{}

    rows, err := db.Query("SELECT id, title, type, release_date, artwork, buyname, buylink FROM musicreleases")
    if err != nil {
        return nil, err
    }

    for rows.Next() {
        var release = music.MusicRelease{}
        release.Credits = []music.MusicCredit{}
        release.Links = []music.MusicLink{}
        release.Tracks = []music.MusicTrack{}

        err = rows.Scan(
            &release.Id,
            &release.Title,
            &release.Type,
            &release.ReleaseDate,
            &release.Artwork,
            &release.Buyname,
            &release.Buylink)
        if err != nil {
            continue
        }

        // pull musiccredits for artist data
        credit_rows, err := db.Query("SELECT artist, role, is_primary FROM musiccredits WHERE release=$1", release.Id)
        if err != nil {
            fmt.Printf("error pulling credits for %s: %v\n", release.Id, err)
            continue
        }
        for credit_rows.Next() {
            var artistID string
            var credit = music.MusicCredit{}
            err = credit_rows.Scan(
                &artistID,
                &credit.Role,
                &credit.Primary)
            if err != nil {
                fmt.Printf("error pulling credit for %s: %v\n", release.Id, err)
                continue
            }
            artist, err := music.GetArtist(artistID)
            if err != nil {
                fmt.Printf("error pulling credit for %s: %v\n", release.Id, err)
                continue
            }
            credit.Artist = artist
            release.Credits = append(release.Credits, credit)
        }

        // pull musiclinks for link data
        link_rows, err := db.Query("SELECT name, url FROM musiclinks WHERE release=$1", release.Id);
        if err != nil {
            fmt.Printf("error pulling links for %s: %v\n", release.Id, err)
            continue
        }
        for link_rows.Next() {
            var link = music.MusicLink{}
            err = link_rows.Scan(
                &link.Name,
                &link.Url)
            if err != nil {
                fmt.Printf("error pulling link for %s: %v\n", release.Id, err)
                continue
            }
            release.Links = append(release.Links, link)
        }

        // pull musictracks for track data
        track_rows, err := db.Query("SELECT number, title, description, lyrics, preview_url FROM musictracks WHERE release=$1", release.Id);
        if err != nil {
            fmt.Printf("error pulling tracks for %s: %v\n", release.Id, err)
            continue
        }
        for track_rows.Next() {
            var track = music.MusicTrack{}
            err = track_rows.Scan(
                &track.Number,
                &track.Title,
                &track.Description,
                &track.Lyrics,
                &track.PreviewUrl)
            if err != nil {
                fmt.Printf("error pulling track for %s: %v\n", release.Id, err)
                continue
            }
            release.Tracks = append(release.Tracks, track)
        }

        releases = append(releases, &release)
    }

    return releases, nil
}

func PullRelease(db *sqlx.DB, releaseID string) (music.MusicRelease, error) {
    release := music.MusicRelease{}

    err := db.Get(&release, "SELECT id, title, type, release_date, artwork, buyname, buylink FROM musicreleases WHERE id=$1", releaseID)
    if err != nil {
        return music.MusicRelease{}, err
    }

    return release, nil
}

func InitDatabase() *sqlx.DB {
        db, err := sqlx.Connect("postgres", "user=arimelody dbname=arimelody password=fuckingpassword sslmode=disable")
        if err != nil {
                fmt.Fprintf(os.Stderr, "unable to create database connection pool: %v\n", err)
                os.Exit(1)
        }

        db.SetConnMaxLifetime(time.Minute * 3)
        db.SetMaxOpenConns(10)
        db.SetMaxIdleConns(10)

        return db
}