console.log('WTF');
let currentCode = '_';
const paletteEl = document.getElementById('palette');
Object.entries(palette).forEach(([code, color])=>{
    const btn = document.createElement('button');
    Object.assign(btn.style, {
        background: color || 'linear-gradient(45deg,black,white)',
        display: 'inline-block',
        width: '40px',
        height: '40px',
        border: '1px solid black'
    });
    if (code === currentCode) btn.className = 'active';
    paletteEl.appendChild(btn);
    btn.addEventListener('click', (e)=>{
        currentCode = code;
        e.preventDefault();
        document.querySelector('#palette button.active')?.classList.remove('active');
        btn.classList.add('active');
    });
});
function renderAllLevels() {
    allLevels.forEach((level, levelIndex)=>{
        addLevelEditorToList(level, levelIndex);
    });
}
function addLevelEditorToList(level, levelIndex) {
    const { name, bricks, size, svg, color } = level;
    let div = document.createElement('div');
    div.innerHTML = ` 
            <button data-level="${levelIndex}" data-rename="yep">${name}</button>
            <div>
            <button data-level="${levelIndex}" data-delete="yep">Delete</button>
            <button data-offset-level-size="-1" data-level="${levelIndex}">-</button>
            <button data-offset-level-size="1" data-level="${levelIndex}">+</button>
            <button data-offset-x="-1"  data-offset-y="0" data-level="${levelIndex}">L</button>
            <button data-offset-x="1"  data-offset-y="0" data-level="${levelIndex}">R</button>
            <button data-offset-x="0"  data-offset-y="-1" data-level="${levelIndex}">U</button>
            <button data-offset-x="0"  data-offset-y="1" data-level="${levelIndex}">D</button>
            <input type="color" value="${level.color || ''}" data-level="${levelIndex}" />
            <input type="number" value="${level.svg || hashCode(level.name) % backgrounds.length}" data-level="${levelIndex}" data-num-val="svg" />
            
            <button data-level="${levelIndex}" data-set-bg-svg="true" >${svg ? 'replace' : 'set'}</button> 
 
           
            </div>
            
            <div class="level-bricks-preview" id="bricks-of-${levelIndex}" > 
            </div>
       `;
    document.getElementById('levels').appendChild(div);
    renderLevelBricks(levelIndex);
    updateLevelBackground(levelIndex);
}
function updateLevelBackground(levelIndex) {
    const div = document.getElementById("bricks-of-" + levelIndex);
    const level = allLevels[levelIndex];
    const { svg, color } = level;
    if (color) Object.assign(div.style, {
        backgroundImage: 'none',
        backgroundColor: color
    });
    else {
        const index = svg || hashCode(level.name) % backgrounds.length;
        const svgSource = backgrounds[index];
        console.log(index);
        div.setAttribute('data-svg', svgSource);
        Object.assign(div.style, {
            backgroundImage: `url("data:image/svg+xml;UTF8,${encodeURIComponent(svgSource)}")`,
            backgroundColor: 'transparent'
        });
    }
}
function renderLevelBricks(levelIndex) {
    const { size, bricks } = allLevels[levelIndex];
    const buttons = [];
    for(let x = 0; x < size; x++)for(let y = 0; y < size; y++){
        const index = y * size + x;
        buttons.push(`<button style="background: ${palette[bricks[index]] || 'transparent'}; left:${x * 40}px;top:${y * 40}px;width:40px;height: 40px; position: absolute" data-set-color-of="${index}" data-level="${levelIndex}"></button>`);
    }
    const div = document.getElementById("bricks-of-" + levelIndex);
    div.innerHTML = buttons.join('');
    Object.assign(div.style, {
        width: size * 40 + 'px',
        height: size * 40 + 'px'
    });
}
document.getElementById('levels').addEventListener('change', (e)=>{
    const levelIndexStr = e.target.getAttribute('data-level');
    if (levelIndexStr) {
        const levelIndex = parseInt(levelIndexStr);
        const level = allLevels[levelIndex];
        if (e.target.getAttribute('type') === 'color') {
            level.color = e.target.value;
            level.svg = '';
            updateLevelBackground(levelIndex);
        } else if (e.target.getAttribute('type') === 'checkbox' && e.target.hasAttribute('data-field')) {
            const field = e.target.getAttribute('data-field');
            if (field === 'focus') allLevels.forEach((l)=>l.focus = false);
            level[field] = !!e.target.checked;
        }
        save();
    }
});
document.getElementById('levels').addEventListener('click', (e)=>{
    const resize = e.target.getAttribute('data-offset-level-size');
    const moveX = e.target.getAttribute('data-offset-x');
    const moveY = e.target.getAttribute('data-offset-y');
    const levelIndexStr = e.target.getAttribute('data-level');
    if (!levelIndexStr) return;
    if (e.target.tagName !== 'BUTTON') return;
    const levelIndex = parseInt(levelIndexStr);
    const level = allLevels[levelIndex];
    const { bricks, size } = level;
    if (resize) {
        const newSize = size + parseInt(resize);
        const newBricks = new Array(newSize * newSize).fill('_');
        for(let x = 0; x < Math.min(size, newSize); x++)for(let y = 0; y < Math.min(size, newSize); y++)newBricks[y * newSize + x] = bricks.split('')[y * size + x] || '_';
        level.size = newSize;
        level.bricks = newBricks.map((b)=>b || '_').join('');
    } else if (moveX && moveY) {
        const dx = parseInt(moveX), dy = parseInt(moveY);
        const newBricks = new Array(size * size).fill('_');
        for(let x = 0; x < size; x++)for(let y = 0; y < size; y++)newBricks[(y + dy) * size + (x + dx)] = bricks.split('')[y * size + x] || '_';
        level.bricks = newBricks.map((b)=>b || '_').join('');
    } else if (e.target.getAttribute('data-rename')) {
        const newName = prompt('Name ? ', level.name);
        if (newName) {
            level.name = newName;
            e.target.textContent = newName;
        }
    } else if (e.target.getAttribute('data-delete')) {
        if (confirm('Delete level')) {
            allLevels = allLevels.filter((l, i)=>i !== levelIndex);
            save().then(()=>window.location.reload());
        }
    } else if (e.target.getAttribute('data-set-bg-svg')) {
        const newBg = prompt('New svg code', level.svg || '');
        if (newBg) {
            level.svg = newBg;
            level.color = '';
        }
        updateLevelBackground(levelIndex);
    }
    renderLevelBricks(levelIndex);
    save();
}, true);
let applying = '';
function colorPixel(e) {
    if (applying === '') return;
    console.log('colorPixel', applying);
    const index = e.target.getAttribute('data-set-color-of');
    const level = e.target.getAttribute('data-level');
    if (index && level) {
        const levelIndex = parseInt(level);
        e.target.style.background = palette[applying] || 'transparent';
        setBrick(levelIndex, parseInt(index), applying);
    }
}
function setBrick(levelIndex, index, chr) {
    const bricks = allLevels[levelIndex].bricks;
    allLevels[levelIndex].bricks = bricks.substring(0, index) + chr + bricks.substring(index + 1);
}
document.getElementById('levels').addEventListener('mousedown', (e)=>{
    const index = parseInt(e.target.getAttribute('data-set-color-of'));
    const level = e.target.getAttribute('data-level');
    if (typeof index !== "undefined" && level) {
        const before = allLevels[parseInt(level)].bricks[index] || '';
        applying = before === currentCode ? '_' : currentCode;
        console.log({
            before,
            applying,
            currentCode
        });
        colorPixel(e);
    }
});
document.getElementById('levels').addEventListener('mouseenter', (e)=>{
    if (applying !== '') colorPixel(e);
}, true);
document.addEventListener('mouseup', (e)=>{
    applying = '';
    save();
});
document.getElementById('new-level').addEventListener('click', (e)=>{
    const name = prompt("Name ? ");
    if (!name) return;
    allLevels.push({
        name,
        size: 8,
        bricks: '',
        svg: ''
    });
    const levelIndex = allLevels.length - 1;
    addLevelEditorToList(allLevels[levelIndex], levelIndex);
    save();
}, true);
renderAllLevels();
function save() {
    return fetch('/', {
        method: 'POST',
        headers: {
            'Content-Type': 'text/plain'
        },
        body: JSON.stringify(allLevels, null, 2)
    });
}
function hashCode(string) {
    var hash = 0;
    for(var i = 0; i < string.length; i++){
        var code = string.charCodeAt(i);
        hash = (hash << 5) - hash + code;
        hash = hash & hash; // Convert to 32bit integer
    }
    return Math.abs(hash);
}

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