/*
 * quick-dock.js — optional always-visible, DRAGGABLE mini tool dock for one-tap tool switching.
 *
 * Isolated + additive: it does NOT rework the existing toolbar. Every button proxies to the real
 * control (clicks the actual tool button, or calls window.presentationTools), so all existing logic
 * is reused. Toggled from Settings > Presentation (localStorage 'toolDockMode'); default OFF, so the
 * current toolbar is unchanged unless the user opts in. Position is remembered across sessions.
 */
(function () {
  'use strict';

  var COLORS = [
    { c: '#fefefe', t: 'White' }, { c: '#ff3333', t: 'Red' }, { c: '#0090ff', t: 'Blue' },
    { c: '#00ff00', t: 'Green' }, { c: '#ffff00', t: 'Yellow' }
  ];
  var POS_KEY = 'quickDockPos';
  var STATE_KEY = 'toolDockState'; // 'docked' (top rail) | 'floating'
  var VIS_KEY = 'toolVisibility';
  var DOCK_ZONE = 90;              // px from top; releasing the dock here re-docks it to the top rail
  var dock = null, colorsRow = null, syncTimer = 0;

  // Tools the user can show/hide (Settings). 'menu' is always shown so Settings stays reachable.
  var TOGGLEABLE = ['pen', 'highlight', 'erase', 'laser', 'spotlight', 'undo', 'redo', 'clear'];
  var DOCK_BTNS = [
    { k: 'pen', i: 'fa-pen', t: 'Pen' },
    { k: 'highlight', i: 'fa-highlighter', t: 'Highlighter' },
    { k: 'erase', i: 'fa-eraser', t: 'Eraser' },
    { k: 'laser', i: 'fa-circle-dot', t: 'Laser' },
    { k: 'spotlight', i: 'fa-bullseye', t: 'Spotlight' },
    { k: 'undo', i: 'fa-undo', t: 'Undo' },
    { k: 'redo', i: 'fa-redo', t: 'Redo' },
    { k: 'clear', i: 'fa-trash', t: 'Clear' }
  ];
  // Top-toolbar elements for each toggleable tool (visibility applies here too).
  var TOP_SEL = {
    pen: '#penToolBtn', highlight: '#highlightToolBtn', erase: '.tool-icon[data-tool="erase"]',
    laser: '#laserToolBtn', spotlight: '#spotlightToolBtn',
    undo: '#undoBtn', redo: '#redoBtn', clear: '#resetBtn'
  };

  function byId(id) { return document.getElementById(id); }
  function getState() { try { return localStorage.getItem(STATE_KEY) === 'floating' ? 'floating' : 'docked'; } catch (_) { return 'docked'; } }
  function toolVis() {
    var def = { pen: true, highlight: true, erase: true, laser: true, spotlight: true, undo: true, redo: true, clear: true };
    try {
      var s = JSON.parse(localStorage.getItem(VIS_KEY) || 'null');
      if (s && typeof s === 'object') TOGGLEABLE.forEach(function (k) { if (k in s) def[k] = !!s[k]; });
    } catch (_) {}
    return def;
  }
  // Hide/show tools in the EXISTING top toolbar per the visibility config (applies with dock off too).
  function applyToolVisibilityToTop(cfg) {
    try {
      Object.keys(TOP_SEL).forEach(function (k) {
        var el = document.querySelector(TOP_SEL[k]);
        if (!el) return;
        var target = el.closest('.tool-wrapper') || el;
        target.style.display = (cfg[k] === false) ? 'none' : '';
      });
    } catch (_) {}
  }
  function realClick(sel) { try { var el = typeof sel === 'string' ? document.querySelector(sel) : sel; if (el) el.click(); } catch (_) {} }

  function activeTool() {
    try { if (window.presentationTools) { var m = window.presentationTools.getMode(); if (m) return m; } } catch (_) {}
    return window.currentTool || 'pen';
  }

  function build() {
    if (dock) return;
    var cfg = toolVis();
    dock = document.createElement('div');
    dock.id = 'quickDock';
    dock.className = 'quick-dock';
    var html = '<div class="qd-grip" title="Drag to move"><i class="fas fa-grip-vertical"></i></div>';
    DOCK_BTNS.forEach(function (b) {
      if (cfg[b.k] !== false) html += '<button class="qd-btn" data-qd="' + b.k + '" title="' + b.t + '"><i class="fas ' + b.i + '"></i></button>';
    });
    // Menu is ALWAYS present so Settings / Content Manager stay reachable while the dock is on.
    html += '<button class="qd-btn qd-menu" data-qd="menu" title="Menu (Settings)"><i class="fas fa-bars"></i></button>';
    html += '<div class="qd-colors" id="qdColors"></div>';
    dock.innerHTML = html;
    document.body.appendChild(dock);
    colorsRow = byId('qdColors');
    restorePos();
    wireButtons();
    wireDrag();
  }

  function restorePos() {
    try {
      var p = JSON.parse(localStorage.getItem(POS_KEY) || 'null');
      if (p && typeof p.left === 'number' && typeof p.top === 'number') {
        dock.style.left = Math.max(0, Math.min(window.innerWidth - 60, p.left)) + 'px';
        dock.style.top = Math.max(0, Math.min(window.innerHeight - 80, p.top)) + 'px';
      } else {
        dock.style.left = '12px'; dock.style.top = '34vh';
      }
      dock.style.right = 'auto';
    } catch (_) { dock.style.left = '12px'; dock.style.top = '34vh'; dock.style.right = 'auto'; }
  }
  function savePos() {
    try { var r = dock.getBoundingClientRect(); localStorage.setItem(POS_KEY, JSON.stringify({ left: Math.round(r.left), top: Math.round(r.top) })); } catch (_) {}
  }

  function selectTool(kind) {
    if (kind === 'pen') realClick('#penToolBtn');
    else if (kind === 'highlight') realClick('#highlightToolBtn');
    else if (kind === 'erase') realClick('.tool-icon[data-tool="erase"]');
    else if (kind === 'laser') { if (window.presentationTools) window.presentationTools.laser(); }
    else if (kind === 'spotlight') { if (window.presentationTools) window.presentationTools.spotlight(); }
    else if (kind === 'undo') realClick('#undoBtn');
    else if (kind === 'redo') realClick('#redoBtn');
    else if (kind === 'clear') realClick('#resetBtn');
    else if (kind === 'menu') realClick('#touchMenuBtn');
    sync();
  }

  function showColors(kind) {
    if (!colorsRow) return;
    /*
     * The swatch row is wider than the button column, so the floating dock has to grow. Width cannot be
     * animated from 'auto', so the dock carries an explicit width and this class switches it to the wide
     * one — CSS then eases between them instead of snapping.
     */
    if (!kind) {
      colorsRow.classList.remove('show');
      if (dock) dock.classList.remove('qd-wide');
      // Empty it only after the collapse has finished, so the swatches do not vanish mid-animation.
      setTimeout(function () { if (!colorsRow.classList.contains('show')) colorsRow.innerHTML = ''; }, 200);
      return;
    }
    colorsRow.innerHTML = '';
    COLORS.forEach(function (o) {
      var b = document.createElement('button');
      b.className = 'qd-color';
      b.style.background = o.c;
      b.title = o.t;
      b.setAttribute('data-color', o.c);
      b.addEventListener('click', function (e) { e.stopPropagation(); pickColor(kind, o.c); });
      colorsRow.appendChild(b);
    });
    colorsRow.classList.add('show');
    if (dock) dock.classList.add('qd-wide');
  }
  function pickColor(kind, c) {
    if (kind === 'pen') realClick('#penColorDropdown .pen-color-option[data-color="' + c + '"]');
    else if (kind === 'highlight') realClick('#highlighterColorDropdown .highlighter-color-option[data-color="' + c + '"]');
    else if (kind === 'laser') { if (window.presentationTools) window.presentationTools.setLaserColor(c); }
    showColors(false);
    sync();
  }

  function wireButtons() {
    dock.querySelectorAll('.qd-btn').forEach(function (btn) {
      var kind = btn.getAttribute('data-qd');
      if (kind === 'clear') { wireClearHold(btn); return; } // clear = tap-vs-hold, not a plain click
      btn.addEventListener('click', function (e) {
        e.preventDefault();
        if (kind === 'undo' || kind === 'redo' || kind === 'menu') { selectTool(kind); return; }
        var colorable = (kind === 'pen' || kind === 'highlight' || kind === 'laser');
        var wasActive = (activeTool() === kind);
        if (colorable && wasActive) {
          // Second tap on the already-active colourable tool toggles its swatches (mirrors top toolbar)
          if (colorsRow.classList.contains('show')) showColors(false); else showColors(kind);
          return;
        }
        selectTool(kind);
        showColors(false);
      });
    });
  }

  // Clear button: tap = clear current tab, hold 1.5s = clear all — with a red progress bar +
  // blue-glow-while-holding + red flash, matching the top toolbar's trash button exactly.
  function wireClearHold(btn) {
    var HOLD = 1500, PROGRESS_DELAY = 300;
    var holdTimer = null, progressRAF = null, startT = 0, isHolding = false, processing = false;
    var bar = document.createElement('div');
    bar.className = 'qd-clear-progress';
    btn.appendChild(bar);
    function reset() { btn.classList.remove('qd-holding', 'qd-flash'); bar.style.width = '0%'; }
    function begin(e) {
      e.preventDefault();
      if (holdTimer || processing) return;
      isHolding = false; startT = Date.now();
      btn.classList.add('qd-holding');
      try { btn.setPointerCapture(e.pointerId); } catch (_) {}
      holdTimer = setTimeout(function () { isHolding = true; }, HOLD);
      setTimeout(function () {
        if (!holdTimer) return;
        var step = function () {
          if (!holdTimer) { progressRAF = null; return; }
          var p = Math.min((Date.now() - startT) / HOLD * 100, 100);
          bar.style.width = p + '%';
          if (p >= 100) { progressRAF = null; bar.style.width = '0%'; btn.classList.add('qd-flash'); }
          else progressRAF = requestAnimationFrame(step);
        };
        progressRAF = requestAnimationFrame(step);
      }, PROGRESS_DELAY);
    }
    function end() {
      if (processing) return;
      var wasHolding = isHolding, pct = (Date.now() - startT) / HOLD * 100;
      clearTimeout(holdTimer); holdTimer = null;
      if (progressRAF) { cancelAnimationFrame(progressRAF); progressRAF = null; }
      processing = true;
      try {
        var tabId = window.bibleApp && window.bibleApp.activeTabId;
        if (wasHolding) { if (window.clearAllAnnotationsAcrossApp) window.clearAllAnnotationsAcrossApp(); }
        else if (pct < 20) { if (window.clearAllAnnotations) window.clearAllAnnotations(tabId); }
      } catch (_) {}
      setTimeout(function () { reset(); processing = false; }, wasHolding ? 350 : 0);
    }
    function cancel() {
      clearTimeout(holdTimer); holdTimer = null; isHolding = false;
      if (progressRAF) { cancelAnimationFrame(progressRAF); progressRAF = null; }
      reset();
    }
    btn.addEventListener('pointerdown', begin);
    btn.addEventListener('pointerup', end);
    btn.addEventListener('pointercancel', cancel);
  }

  // Drag the dock by its grip (a large full-width bar across the top). Uses DOCUMENT-level move/up so
  // the drag grabs on the FIRST touch and keeps following even if the finger slides off the grip —
  // no "wake it up first" and no repeated tries.
  function wireDrag() {
    var grip = dock.querySelector('.qd-grip');
    if (!grip) return;
    var dragging = false, sx = 0, sy = 0, ox = 0, oy = 0, lastY = 0;
    function move(e) {
      if (!dragging) return;
      lastY = e.clientY;
      var nx = Math.max(0, Math.min(window.innerWidth - dock.offsetWidth, ox + (e.clientX - sx)));
      var ny = Math.max(0, Math.min(window.innerHeight - dock.offsetHeight, oy + (e.clientY - sy)));
      dock.style.left = nx + 'px'; dock.style.top = ny + 'px'; dock.style.right = 'auto';
      dock.classList.toggle('qd-will-dock', e.clientY < DOCK_ZONE); // hint: release here to dock
    }
    function up() {
      document.removeEventListener('pointermove', move, true);
      document.removeEventListener('pointerup', up, true);
      document.removeEventListener('pointercancel', up, true);
      if (!dragging) return;
      dragging = false;
      dock.classList.remove('dragging', 'qd-will-dock');
      setBright(true);
      if (lastY < DOCK_ZONE) setDockState('docked'); // "thrown" to the top rail → dock
      else savePos();
    }
    grip.addEventListener('pointerdown', function (e) {
      e.preventDefault();
      dragging = true;
      var r = dock.getBoundingClientRect();
      ox = r.left; oy = r.top; sx = e.clientX; sy = e.clientY; lastY = e.clientY;
      dock.classList.add('dragging');
      setBright(true);
      document.addEventListener('pointermove', move, true);
      document.addEventListener('pointerup', up, true);
      document.addEventListener('pointercancel', up, true);
    });
  }

  // Mirror the live colour of the matching top-toolbar icon so the dock looks identical.
  var COLOR_MIRROR = {
    pen: '#penToolBtn', highlight: '#highlightToolBtn', erase: '.tool-icon[data-tool="erase"]',
    laser: '#laserToolBtn', spotlight: '#spotlightToolBtn'
  };
  function activeTabMode() {
    try { var a = window.bibleApp; var t = a && a.tabs && a.tabs.find(function (x) { return x.id === a.activeTabId; }); return t ? t.mode : null; } catch (_) { return null; }
  }
  function sync() {
    if (!dock) return;
    // While floating, hide on tabs where drawing tools don't apply (media + ask + prayer); reappear (same spot) elsewhere.
    var mode = activeTabMode();
    var HIDE_ON = ['announcements', 'graphics', 'maps', 'ask', 'prayer'];
    var show = getState() === 'floating' && HIDE_ON.indexOf(mode) === -1;
    dock.style.display = show ? 'flex' : 'none';
    if (!show) return;
    var a = activeTool();
    dock.querySelectorAll('.qd-btn').forEach(function (b) {
      var k = b.getAttribute('data-qd');
      if (!(k === 'undo' || k === 'redo' || k === 'clear' || k === 'menu')) b.classList.toggle('active', k === a);
      if (COLOR_MIRROR[k]) {
        var top = document.querySelector(COLOR_MIRROR[k]);
        if (top) {
          var c = getComputedStyle(top).color;
          if (c && c !== 'rgba(0, 0, 0, 0)') b.style.color = c;
          // The dock's active ring is drawn in currentColor, so the Notes tab's black ink would ring a
          // dark button in black. Same white-paper treatment as the top rail.
          if (typeof window.isDarkInk === 'function') b.classList.toggle('dark-ink', window.isDarkInk(c));
        }
      }
    });
  }

  function applyState() {
    if (getState() === 'floating') {
      build();
      dock.style.display = 'flex';
      document.body.classList.add('qd-on');   // hides the top-rail handle + rail
      if (!syncTimer) syncTimer = setInterval(sync, 300);
      sync();
    } else {
      if (dock) dock.style.display = 'none';
      document.body.classList.remove('qd-on'); // restores the normal top rail + its hide/reveal handle
      if (syncTimer) { clearInterval(syncTimer); syncTimer = 0; }
    }
  }
  function setDockState(s, at) {
    try { localStorage.setItem(STATE_KEY, s === 'floating' ? 'floating' : 'docked'); } catch (_) {}
    applyState();
    if (s === 'floating' && dock && at) {
      var w = dock.offsetWidth || 60, h = dock.offsetHeight || 300;
      dock.style.left = Math.max(0, Math.min(window.innerWidth - w, at.x - w / 2)) + 'px';
      dock.style.top = Math.max(0, Math.min(window.innerHeight - h, at.y)) + 'px';
      dock.style.right = 'auto';
      savePos();
    }
  }

  function setBright(on) { if (dock) dock.classList.toggle('qd-bright', !!on); }

  // Grab a handle and drag it straight out into a floating dock — ONE continuous motion (undock,
  // then the dock follows the finger until release). Used by BOTH the folded top handle and the grip
  // in the opened rail. A plain tap on the folded handle still opens the rail.
  function wireFloatGrab(el) {
    if (!el || el._qdFloat) return;
    el._qdFloat = true;
    var armed = false, dragging = false, sx = 0, sy = 0;
    function place(e) {
      var w = dock.offsetWidth || 60, h = dock.offsetHeight || 300;
      dock.style.left = Math.max(0, Math.min(window.innerWidth - w, e.clientX - w / 2)) + 'px';
      dock.style.top = Math.max(0, Math.min(window.innerHeight - h, e.clientY - 18)) + 'px';
      dock.style.right = 'auto';
      dock.classList.toggle('qd-will-dock', e.clientY < DOCK_ZONE);
    }
    function move(e) {
      if (!armed) return;
      if (!dragging) {
        if (Math.abs(e.clientX - sx) < 12 && Math.abs(e.clientY - sy) < 12) return;
        dragging = true;
        setDockState('floating');
        if (dock) { dock.classList.add('dragging'); setBright(true); }
      }
      if (dock) place(e);
    }
    function up(e) {
      document.removeEventListener('pointermove', move, true);
      document.removeEventListener('pointerup', up, true);
      document.removeEventListener('pointercancel', up, true);
      armed = false;
      if (dragging) {
        dragging = false;
        if (dock) dock.classList.remove('dragging', 'qd-will-dock');
        if (e && e.clientY < DOCK_ZONE) setDockState('docked'); // dragged back to the top → re-dock
        else savePos();
      }
    }
    el.addEventListener('pointerdown', function (e) {
      armed = true; dragging = false; sx = e.clientX; sy = e.clientY;
      document.addEventListener('pointermove', move, true);
      document.addEventListener('pointerup', up, true);
      document.addEventListener('pointercancel', up, true);
    }, true);
  }
  function wireUndock() {
    wireFloatGrab(byId('toolIndicator')); // folded handle
    wireFloatGrab(byId('railGrip'));      // grip in the opened rail (first, left of pen)
  }

  // Auto-dim: the floating dock is bright only while you're touching it; any other input dims it.
  function wireAutoDim() {
    if (window.__qdAutoDim) return;
    window.__qdAutoDim = true;
    document.addEventListener('pointerdown', function (e) {
      if (getState() !== 'floating' || !dock) return;
      setBright(dock.contains(e.target));
    }, true);
    window.addEventListener('wheel', function () { if (getState() === 'floating') setBright(false); }, { passive: true, capture: true });
  }

  window.quickDock = {
    getState: getState,
    floatDock: function () { setDockState('floating'); },
    dockToRail: function () { setDockState('docked'); },
    isEnabled: function () { return getState() === 'floating'; },
    /*
     * Re-read toolVisibility and apply it now. Settings normally only takes effect on the next
     * load, which is fine when the operator walks back into the app — but the admin console pushes
     * a setting to a TV that is mid-service, and reloading the stage to show it is not acceptable.
     */
    refreshToolVisibility: function () {
      try { applyToolVisibilityToTop(toolVis()); applyState(); return true; } catch (_) { return false; }
    }
  };

  function init() {
    applyToolVisibilityToTop(toolVis()); // applies in both docked + floating states
    wireUndock();
    wireAutoDim();
    applyState();
  }
  if (document.readyState !== 'loading') init();
  else document.addEventListener('DOMContentLoaded', init);
})();