// Copyright (c) 2026 Dominic Masters
//
// This software is released under the MIT License.
// https://opensource.org/licenses/MIT

// One Label per console history slot, refreshed only when
// Console.consumeDirty() says the history actually changed -- reuses
// the normal Label/spritebatch render path instead of the old
// hand-rolled mesh-cache renderer.
//
// These Labels are NOT add()ed as children -- UIElement.add() caps at 8
// children per element, and CONSOLE_HISTORY_MAX (Console.lineCount) is
// 16, over that cap. Instead they're driven directly: render()/update()
// called explicitly below, and their world position is just their own
// x/y (never having a parent means nothing offsets it).
class ConsoleOverlay extends UIElement {
  init() {
    this.lines = [];
    for(let i = 0; i < Console.lineCount; i++) {
      const label = new Label();
      label.x = 4;
      label.y = 4 + i * ConsoleOverlay.LINE_HEIGHT;
      this.lines.push(label);
    }

    this._refresh();
  }

  update() {
    this.updateChildren();
    if(Console.consumeDirty()) this._refresh();
    for(let i = 0; i < this.lines.length; i++) this.lines[i].update();
  }

  // Overridden (rather than left to auto-render) so the console can be
  // hidden entirely without disposing/rebuilding its Labels.
  render() {
    this.renderChildren();
    if(!Console.visible) return;
    for(let i = 0; i < this.lines.length; i++) this.lines[i].render();
  }

  // this.lines was never add()ed, so the normal dispose() cascade can't
  // reach them -- release them explicitly first, or they'd leak their
  // pool slots.
  dispose() {
    for(let i = 0; i < this.lines.length; i++) this.lines[i].dispose();
    super.dispose();
  }

  _refresh() {
    for(let i = 0; i < this.lines.length; i++) {
      this.lines[i].text = Console.getLine(i);
    }
  }
}

ConsoleOverlay.LINE_HEIGHT = 12;

module.exports = ConsoleOverlay;