{% extends "base.html" %}
{% block title %}Layout Editor — BashyOverlay{% endblock %}
{% block content %}
<hgroup>
    <h1>Layout Editor</h1>
    <p>Drag handles to reposition. Resize chat from the bottom-right corner. Changes to styles preview live.</p>
</hgroup>

{% if saved %}
<div class="notice-success">Styles saved. Refresh your OBS browser source to apply.</div>
{% endif %}

<div class="editor-wrap" id="editor-wrap">
    <iframe id="preview-frame"
            src="/overlay/preview"
            scrolling="no"
            style="position:absolute;top:0;left:0;width:100%;height:100%;border:none;pointer-events:none;">
    </iframe>

    <div class="drag-handle handle-chat"
         id="handle-chat"
         data-target="chat"
         data-left="{{ layout.chat_left }}"
         data-top="{{ layout.chat_top }}"
         data-width="{{ layout.chat_width }}"
         data-height="{{ layout.chat_height }}"
         style="left:{{ layout.chat_left }}%;top:{{ layout.chat_top }}%;width:{{ layout.chat_width }}%;height:{{ layout.chat_height }}%">
        <div class="handle-label">Chat</div>
        <div class="resize-corner"></div>
    </div>

    <div class="drag-handle handle-alert"
         id="handle-alert"
         data-target="alert"
         data-left="{{ layout.alert_left }}"
         data-top="{{ layout.alert_top }}"
         style="left:{{ layout.alert_left }}%;top:{{ layout.alert_top }}%;transform:translate(-50%,-50%)">
        <div class="handle-label">Alert</div>
    </div>
</div>

<div class="canvas-footer">
    <small class="muted">Positions save on drag end. Refresh OBS browser source after repositioning.</small>
    <button type="button" id="preview-alert-btn" class="outline small-btn">▶ Preview alert</button>
</div>

<form method="post" action="/layout" class="style-form">
    <div class="props-grid">
        <fieldset>
            <legend><strong>Chat</strong></legend>
            <div class="props-row">
                <label>
                    Font size (px)
                    <input type="number" name="chat_font_size" value="{{ layout.chat_font_size }}" min="8" max="48">
                </label>
                <label>
                    BG opacity
                    <input type="range" name="chat_bg_opacity" value="{{ layout.chat_bg_opacity }}"
                           min="0" max="1" step="0.05"
                           oninput="this.nextElementSibling.textContent = (+this.value).toFixed(2)">
                    <span>{{ layout.chat_bg_opacity }}</span>
                </label>
                <label>
                    Text color
                    <input type="color" name="chat_text_color" value="{{ layout.chat_text_color }}">
                </label>
                <label>
                    Max messages
                    <input type="number" name="chat_max_messages" value="{{ layout.chat_max_messages }}" min="1" max="50">
                </label>
            </div>
        </fieldset>

        <fieldset>
            <legend><strong>Alert</strong></legend>
            <div class="props-row">
                <label>
                    Font size (px)
                    <input type="number" name="alert_font_size" value="{{ layout.alert_font_size }}" min="8" max="72">
                </label>
                <label>
                    BG opacity
                    <input type="range" name="alert_bg_opacity" value="{{ layout.alert_bg_opacity }}"
                           min="0" max="1" step="0.05"
                           oninput="this.nextElementSibling.textContent = (+this.value).toFixed(2)">
                    <span>{{ layout.alert_bg_opacity }}</span>
                </label>
                <label>
                    Text color
                    <input type="color" name="alert_text_color" value="{{ layout.alert_text_color }}">
                </label>
                <label>
                    Duration (sec)
                    <input type="number" name="alert_duration" value="{{ layout.alert_duration }}" min="1" max="30">
                </label>
            </div>
        </fieldset>
    </div>
    <button type="submit">Save styles</button>
</form>

<script src="https://cdn.jsdelivr.net/npm/interactjs@1.10.27/dist/interact.min.js"></script>
<script>
const wrap   = document.getElementById('editor-wrap');
const iframe = document.getElementById('preview-frame');

function iframeDoc() { return iframe.contentDocument || iframe.contentWindow?.document; }

function iframeVar(cssVar, value) {
    const doc = iframeDoc();
    if (doc) doc.documentElement.style.setProperty(cssVar, value);
}

// ── Live style preview ────────────────────────────────────────────────────
function bind(name, cssVar, transform = v => v) {
    const el = document.querySelector(`[name="${name}"]`);
    if (!el) return;
    el.addEventListener('input', () => iframeVar(cssVar, transform(el.value)));
}

bind('chat_font_size',   '--chat-font-size',  v => v + 'px');
bind('chat_bg_opacity',  '--chat-bg-opacity');
bind('chat_text_color',  '--chat-text-color');
bind('alert_font_size',  '--alert-font-size', v => v + 'px');
bind('alert_bg_opacity', '--alert-bg-opacity');
bind('alert_text_color', '--alert-text-color');

// ── Preview alert button ──────────────────────────────────────────────────
document.getElementById('preview-alert-btn').addEventListener('click', () => {
    iframe.contentWindow?.postMessage({ type: 'preview-alert' }, '*');
});

// ── Drag ──────────────────────────────────────────────────────────────────
interact('.drag-handle').draggable({
    listeners: {
        move(event) {
            const el  = event.target;
            const ww  = wrap.offsetWidth;
            const wh  = wrap.offsetHeight;
            let left  = parseFloat(el.dataset.left || 0);
            let top   = parseFloat(el.dataset.top  || 0);
            left = Math.max(0, Math.min(95, left + event.dx / ww * 100));
            top  = Math.max(0, Math.min(95, top  + event.dy / wh * 100));
            el.style.left    = left + '%';
            el.style.top     = top  + '%';
            el.dataset.left  = left;
            el.dataset.top   = top;
            const t = el.dataset.target;
            iframeVar(`--${t}-left`, left + '%');
            iframeVar(`--${t}-top`,  top  + '%');
        },
        end(event) {
            const el = event.target;
            savePos(el.dataset.target,
                    parseFloat(el.dataset.left),
                    parseFloat(el.dataset.top),
                    parseFloat(el.dataset.width  || 0),
                    parseFloat(el.dataset.height || 0));
        }
    }
});

// ── Resize (chat only) ────────────────────────────────────────────────────
interact('#handle-chat').resizable({
    edges: { right: true, bottom: true },
    modifiers: [interact.modifiers.restrictSize({ min: { width: 30, height: 30 } })],
    listeners: {
        move(event) {
            const el = event.target;
            const ww = wrap.offsetWidth;
            const wh = wrap.offsetHeight;
            const w  = Math.max(5,  Math.min(100, event.rect.width  / ww * 100));
            const h  = Math.max(5,  Math.min(100, event.rect.height / wh * 100));
            el.style.width    = w + '%';
            el.style.height   = h + '%';
            el.dataset.width  = w;
            el.dataset.height = h;
            iframeVar('--chat-width',  w + '%');
            iframeVar('--chat-height', h + '%');
        },
        end(event) {
            const el = event.target;
            savePos('chat',
                    parseFloat(el.dataset.left),
                    parseFloat(el.dataset.top),
                    parseFloat(el.dataset.width),
                    parseFloat(el.dataset.height));
        }
    }
});

async function savePos(target, left, top, width, height) {
    await fetch('/layout/positions', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ widget: target, left, top, width, height })
    });
}
</script>
{% endblock %}