// SparkedJs (Beta 2) :: "Game/Input Handler.js"

// SparkedJs (Beta 2) :: "Game/Input Handler.js"

function haveCommonEntry(arr1, arr2) {

    let tolerance = 8;

    if ( arr1.length < tolerance && arr2.length < tolerance ) {
        return arr1.some(item => arr2.includes(item));
    } else {
        const set1 = new Set(arr1); return arr2.some(v => set1.has(v));
        return set1;
    }
}

function handleInput(e) {

    let previous = player;

    let keys = {};

    let key = e.key;

    if (key.length === 1) {
        key = key.toUpperCase();
    }

    if ( haveCommonEntry( [key], ["ArrowUp","ArrowDown","ArrowLeft","ArrowRight"] ) ) {

        if ( keys[key] === undefined ){
            keys[key] = 0;
        }
        keys[key]++;

        e.preventDefault();
    }

    if ( haveCommonEntry( [key], ["W","Escape","Q","I"] ) ) {

        if ( keys[key] === undefined ){
            keys[key] = 0;
        }
        keys[key]++;

        e.preventDefault();
    }

    if ( haveCommonEntry( [key], ["ArrowUp"] ) ) player.y--;
    if ( haveCommonEntry( [key], ["ArrowDown"] ) ) player.y++;
    if ( haveCommonEntry( [key], ["ArrowLeft"] ) ) player.x--;
    if ( haveCommonEntry( [key], ["ArrowRight"] ) ) player.x++;

    if ( player.y < 0 ) player.y = 0;

    if ( player.x < 0 ) player.x = 0;

    if ( player.y >= Maps[player.map].raw.length ) player.y = Maps[player.map].raw.length - 1;

    if ( player.x >= Maps[player.map].raw[player.y].length ) player.x = Maps[player.map].raw[player.y].length - 1;

    if ( collisionDebug ) console.log(
        `Collision: `
        + `${typeof Maps[player.map].raw[player.y][player.x]}:`
        + ` ${Maps[player.map].raw[player.y][player.x]}`
        + ` @ (${player.x}, ${player.y}) in "${Maps[player.map].about.title}"`
    );

    if ( `${Maps[player.map].raw[player.y][player.x]}` !== 0 ) {

        if ( collisionDebug ) console.log(
            `Collision Detect @ ( ${player.x}, ${player.y} )`
        );

        if ( collisionDebug ) console.log(
            `Collision Reset @ ( ${previous.x}, ${previous.y} )`
        );

        player.x = previous.x;
        player.y = previous.y;

    }

    if ( haveCommonEntry( [key], ["W"] ) ) {

        player.map++;
        player.map %= Maps.length;
    }

    if ( haveCommonEntry( [key], ["ArrowUp","ArrowDown","ArrowLeft","ArrowRight","W"] ) ) {

        let log = ``;

        log += `Player:` ;
        log += ` "${Sprites[player.sprite].about.title}"`;
        log += ` Map:`;
        log += ` "${Maps[player.map].about.title}"`;
        log += ` ${player.map + 1}/${Maps.length}`;
        log += ` "${Maps[player.map].raw[player.y][player.x]}"`;
        log += ` @`;
        log += ` (`;
        log += ` ${player.x}, ${player.y}`;
        log += ` )`;
        log += ` in`
        log += ` ${Maps[player.map].xspan}`
        log += ` x`
        log += ` ${Maps[player.map].yspan}`;

        if ( collisionDebug ) console.log(log);
    }

    if ( haveCommonEntry( [key], ["Q","Escape"] ) ) {

        document.removeEventListener(`keyup`, handleInput);
        clearInterval(intervalId);
        window.location = `http://${window.location.hostname}/`;
    }

    if ( haveCommonEntry( [key], ["I"] ) ) inventory = (inventory === 2 ? 3 : 2);

    return keys;

}