const database = require('./../database');





class Game {
    constructor(id, date, team1ID, team2ID, team1Score, team2Score, divisionID, seasonID, submitterID) {
        this.id = id;
        this.date = date;
        this.team1ID = team1ID;
        this.team2ID = team2ID;
        this.team1Score = team1Score;
        this.team2Score = team2Score;
        this.divisionID = divisionID;
        this.seasonID = seasonID;
        this.submitterID = submitterID;
    }
}



async function add(divisionID, seasonID, date, team1ID, team2ID, team1Score, team2Score, userID) {
    const query = `INSERT INTO scores.games(division_id, season_id, game_date, team1_id, team2_id, team1_score, team2_score, submitter_id)
            VALUES($1, $2, $3, $4, $5, $6, $7, $8)
            RETURNING game_id;`;

    const id = (await database.executeQuery(query, [divisionID, seasonID, date, team1ID, team2ID, team1Score, team2Score, userID]))[0][0];
    return new Game(id, date, team1ID, team2ID, team1Score, team2Score);
}

async function remove(id) {
    const query = `DELETE FROM scores.games
            WHERE game_id = $1
            RETURNING * ;`;
    const row = (await database.executeQuery(query, [id]))[0];
    return new Game(id, row[3], row[4], row[5], row[6], row[7]);
}

async function retrieve(teamID, divisionID, seasonID) {
    let table;

    if(teamID && divisionID && seasonID) {
        const query = `SELECT game_id, division_id, season_id, game_date, team1_id, team2_id, team1_score, team2_score
            FROM scores.games
            WHERE (team1_id = $1 OR team2_id = $1) AND division_id = $2 AND season_id = $3
            ORDER BY game_date DESC;`;
        table = await database.executeQuery(query, [teamID,divisionID,seasonID]);
    }
    else {
        const query = `SELECT game_id, division_id, season_id, game_date, team1_id, team2_id, team1_score, team2_score
            FROM scores.games
            ORDER BY game_date DESC;`;
        table = await database.executeQuery(query);
    }
    

    const gamesList = [];
    table.forEach((row) => {
        if(teamID) {
            const opponentIsTeam2 = teamID != row[5];
            const opponentID = opponentIsTeam2 ? row[5] : row[4];
            const teamScore = opponentIsTeam2 ? row[6] : row[7];
            const opponentScore = opponentIsTeam2 ? row[7] : row[6];
    
            gamesList.push(new Game(row[0], row[3].toISOString().slice(0,10), teamID, opponentID, teamScore, opponentScore, row[1], row[2]));    
        }
        else {
            gamesList.push(new Game(row[0], row[3].toISOString().slice(0,10), row[4], row[5], row[6], row[7], row[1], row[2]));    
        }
    });
    return gamesList;
}

async function retrieveByUser(userID) {
    const query = `SELECT game_id, division_id, season_id, game_date, team1_id, team2_id, team1_score, team2_score
            FROM scores.games
            WHERE submitter_id = $1
            ORDER BY game_date DESC;`;
    const table = await database.executeQuery(query, [userID]);

    const gamesList = [];
    table.forEach((row) => {
        gamesList.push(new Game(row[0], row[3].toISOString().slice(0,10), row[4], row[5], row[6], row[7], row[1], row[2]));
    });
    return gamesList;
}

async function edit(gameID, divisionID, seasonID, date, team1ID, team2ID, team1Score, team2Score) {
    const query = `UPDATE scores.games
    SET division_id = $2,
        season_id = $3,
        game_date = $4,
        team1_id = $5,
        team2_id = $6,
        team1_score = $7,
        team2_score = $8
    WHERE game_id = $1;`;
    await database.executeQuery(query, [gameID, divisionID, seasonID, date, team1ID, team2ID, team1Score, team2Score]);
    return new Game(gameID, date, team1ID, team2ID, team1Score, team2Score, divisionID, seasonID);
}

async function getFromID(gameID) {
    const query = `SELECT game_id, division_id, season_id, game_date, team1_id, team2_id, team1_score, team2_score, submitter_id
            FROM scores.games
            WHERE game_id = $1;`;
    const row = (await database.executeQuery(query, [gameID]))[0];
    return new Game(row[0], row[3].toISOString().slice(0,10), row[4], row[5], row[6], row[7], row[1], row[2], row[8]);
}

async function getLatest(userID = undefined) {
    if(userID) {
        const games = await retrieveByUser(userID);
        return games[0];
    } else {
        const games = await retrieve();
        return games[0];
    }
}





exports.add = add;
exports.remove = remove;
exports.retrieve = retrieve;
exports.retrieveByUser = retrieveByUser;
exports.edit = edit;
exports.getFromID = getFromID;
exports.getLatest = getLatest;