// Shared template designer utility helpers.

(function () {
  function escapeHtml(value) {
    return String(value === undefined || value === null ? '' : value)
      .replace(/&/g, '&')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#39;');
  }

  function valueOrDefault(value, fallback) {
    return value === undefined || value === null || value === '' ? fallback : value;
  }

  function normalizeLockRatio(value) {
    var raw = String(value || '').trim();
    if (!raw) {
      return '';
    }
    if (!/^\d+\s*:\s*\d+$/.test(raw)) {
      return '';
    }
    return raw.replace(/\s+/g, '');
  }

  function parseLockRatio(value) {
    var normalized = normalizeLockRatio(value);
    if (!normalized) {
      return null;
    }

    var parts = normalized.split(':');
    var width = Number(parts[0]);
    var height = Number(parts[1]);
    if (!Number.isFinite(width) || !Number.isFinite(height) || width <= 0 || height <= 0) {
      return null;
    }

    return {
      label: normalized,
      ratio: width / height
    };
  }

  function getDefaultRegionSize(regionType, lockRatio) {
    if (window.pulseRegionTypes && typeof window.pulseRegionTypes.getDefaultRegionSize === 'function') {
      return window.pulseRegionTypes.getDefaultRegionSize(regionType, lockRatio);
    }

    var ratio = parseLockRatio(lockRatio);
    var locked = false;

    if (ratio) {
      if (ratio.ratio >= 1) {
        var baseWidth = locked ? 420 : 300;
        return {
          width: Math.max(12, Math.round(baseWidth)),
          height: Math.max(12, Math.round(baseWidth / ratio.ratio))
        };
      }

      var baseHeight = locked ? 300 : 240;
      return {
        width: Math.max(12, Math.round(baseHeight * ratio.ratio)),
        height: Math.max(12, Math.round(baseHeight))
      };
    }

    return {
      width: locked ? 420 : 300,
      height: locked ? 240 : 120
    };
  }

  function clamp(value, min, max) {
    return Math.max(min, Math.min(max, value));
  }

  function getRegionName(card) {
    return String(card.querySelector('[name="region_name[]"]').value || '').trim();
  }

  function getAnimationConfig(card) {
    var hiddenAnimationInput = card.querySelector('[name="region_animation_json[]"]');
    var animationConfig = normalizeAnimationConfig(hiddenAnimationInput ? hiddenAnimationInput.value || '{}' : '{}');
    var introPresetInput = card.querySelector('[data-animation-preset="intro"]');
    var outroPresetInput = card.querySelector('[data-animation-preset="outro"]');
    var loopPresetInput = card.querySelector('[data-animation-preset="loop"]');

    if (introPresetInput && introPresetInput.dataset.animationPresetCustom !== '1' && introPresetInput.selectedIndex >= 0) {
      animationConfig.intro.preset = normalizePreviewAnimation(introPresetInput.value);
    }
    if (outroPresetInput && outroPresetInput.dataset.animationPresetCustom !== '1' && outroPresetInput.selectedIndex >= 0) {
      animationConfig.outro.preset = normalizePreviewAnimation(outroPresetInput.value);
    }
    if (loopPresetInput && loopPresetInput.dataset.animationPresetCustom !== '1' && loopPresetInput.selectedIndex >= 0) {
      animationConfig.loop.preset = normalizePreviewAnimation(loopPresetInput.value);
    }

    return animationConfig;
  }

  function getAnimationPresetValues() {
    var presets = window.templateAnimationPresets || {};
    if (Array.isArray(presets.allValues) && presets.allValues.length) {
      return presets.allValues;
    }

    return [
      'none', 'fadeIn', 'fadeInDown', 'fadeInLeft', 'fadeInRight', 'fadeInUp', 'zoomIn', 'zoomInDown',
      'zoomInLeft', 'zoomInRight', 'zoomInUp', 'slideInDown', 'slideInLeft', 'slideInRight', 'slideInUp',
      'fadeOut', 'fadeOutDown', 'fadeOutLeft', 'fadeOutRight', 'fadeOutUp', 'zoomOut', 'zoomOutDown',
      'zoomOutLeft', 'zoomOutRight', 'zoomOutUp', 'slideOutDown', 'slideOutLeft', 'slideOutRight', 'slideOutUp',
      'backInDown', 'backInLeft', 'backInRight', 'backInUp', 'backOutDown', 'backOutLeft', 'backOutRight', 'backOutUp',
      'bounceIn', 'bounceInDown', 'bounceInLeft', 'bounceInRight', 'bounceInUp', 'bounceOut', 'bounceOutDown', 'bounceOutLeft', 'bounceOutRight', 'bounceOutUp',
      'flip', 'flipInX', 'flipInY', 'flipOutX', 'flipOutY', 'lightSpeedInLeft', 'lightSpeedInRight', 'lightSpeedOutLeft', 'lightSpeedOutRight',
      'rotateIn', 'rotateInDownLeft', 'rotateInDownRight', 'rotateInUpLeft', 'rotateInUpRight', 'rotateOut', 'rotateOutDownLeft', 'rotateOutDownRight', 'rotateOutUpLeft', 'rotateOutUpRight',
      'hinge', 'jackInTheBox', 'rollIn', 'rollOut', 'flash', 'pulse', 'rubberBand', 'shakeX', 'shakeY', 'headShake', 'swing', 'tada', 'wobble', 'jello', 'heartBeat', 'bounce'
    ];
  }

  function getAnimationPresetMap() {
    var lookup = {};
    getAnimationPresetValues().forEach(function (value) {
      lookup[value] = true;
    });
    return lookup;
  }

  function syncAnimationPresetCustomState(selectInput, resetButton, preset) {
    if (!selectInput) {
      return;
    }

    var normalizedPreset = normalizePreviewAnimation(preset);
    var hasMatchingOption = Array.prototype.some.call(selectInput.options || [], function (option) {
      return option && option.value === normalizedPreset;
    });

    if (hasMatchingOption) {
      delete selectInput.dataset.animationPresetCustom;
      selectInput.hidden = false;
      if (resetButton) {
        resetButton.hidden = true;
      }
    } else {
      selectInput.dataset.animationPresetCustom = '1';
      selectInput.hidden = true;
      if (resetButton) {
        resetButton.hidden = false;
        resetButton.textContent = 'Reset to basic';
      }
    }
  }

  function writeAnimationConfig(card, animationConfig) {
    var normalized = normalizeAnimationConfig(animationConfig);
    var hiddenAnimationInput = card.querySelector('[name="region_animation_json[]"]');
    var introPresetInput = card.querySelector('[data-animation-preset="intro"]');
    var outroPresetInput = card.querySelector('[data-animation-preset="outro"]');
    var loopPresetInput = card.querySelector('[data-animation-preset="loop"]');
    var introResetButton = card.querySelector('[data-animation-reset-button="intro"]');
    var outroResetButton = card.querySelector('[data-animation-reset-button="outro"]');
    var loopResetButton = card.querySelector('[data-animation-reset-button="loop"]');

    if (hiddenAnimationInput) {
      hiddenAnimationInput.value = JSON.stringify(normalized, null, 2);
    }
    if (introPresetInput) {
      introPresetInput.value = normalized.intro.preset;
      syncAnimationPresetCustomState(introPresetInput, introResetButton, normalized.intro.preset);
    }
    if (outroPresetInput) {
      outroPresetInput.value = normalized.outro.preset;
      syncAnimationPresetCustomState(outroPresetInput, outroResetButton, normalized.outro.preset);
    }
    if (loopPresetInput) {
      loopPresetInput.value = normalized.loop.preset;
      syncAnimationPresetCustomState(loopPresetInput, loopResetButton, normalized.loop.preset);
    }

    return normalized;
  }

  function normalizePreviewAnimation(value) {
    if (window.templateAnimationPresets && typeof window.templateAnimationPresets.normalize === 'function') {
      return window.templateAnimationPresets.normalize(value);
    }

    var allowed = getAnimationPresetMap();

    var raw = String(value || '').trim().toLowerCase();
    return allowed[raw] ? raw : 'none';
  }

  function normalizeAnimationStep(value, fallbackPreset) {
    if (value && typeof value === 'object' && !Array.isArray(value)) {
      var normalized = {};
      Object.keys(value).forEach(function (key) {
        normalized[key] = value[key];
      });
      normalized.preset = normalizePreviewAnimation(value.preset !== undefined ? value.preset : fallbackPreset || 'none');
      normalized.duration_ms = Number.isFinite(Number(value.duration_ms)) && Number(value.duration_ms) > 0 ? Math.round(Number(value.duration_ms)) : null;
      normalized.delay_ms = Number.isFinite(Number(value.delay_ms)) && Number(value.delay_ms) >= 0 ? Math.round(Number(value.delay_ms)) : null;
      normalized.iterations = Number.isFinite(Number(value.iterations)) && Number(value.iterations) > 0 ? Math.round(Number(value.iterations)) : null;
      normalized.easing = String(value.easing || '').trim();
      normalized.fill_mode = String(value.fill_mode || '').trim();
      return normalized;
    }

    return {
      preset: normalizePreviewAnimation(typeof value === 'string' ? value : fallbackPreset || 'none'),
      duration_ms: null,
      delay_ms: null,
      iterations: null,
      easing: '',
      fill_mode: ''
    };
  }

  function normalizeAnimationConfig(value) {
    var raw = value;
    if (typeof raw === 'string') {
      var text = String(raw || '').trim();
      if (!text) {
        raw = null;
      } else {
        try {
          raw = JSON.parse(text);
        } catch (_error) {
          raw = null;
        }
      }
    }

    if (!raw || typeof raw !== 'object' || Array.isArray(raw)) {
      raw = {};
    }

    return {
      intro: normalizeAnimationStep(raw.intro, 'none'),
      outro: normalizeAnimationStep(raw.outro !== undefined ? raw.outro : raw.out, 'none'),
      loop: normalizeAnimationStep(raw.loop, 'none')
    };
  }

  function formatAnimationConfig(value) {
    return JSON.stringify(normalizeAnimationConfig(value), null, 2);
  }

  function syncRegionIdentity(card, value) {
    var next = String(value || '').trim();
    card.querySelector('[name="region_name[]"]').value = next;
    card.querySelector('[name="region_key[]"]').value = next;
    card.querySelector('[name="region_label[]"]').value = next;
  }

  function readCard(card) {
    var name = getRegionName(card);
    return {
      region_key: name,
      label: name,
      region_type: card.querySelector('[name="region_type[]"]').value,
      lock_ratio: normalizeLockRatio(card.querySelector('[name="region_lock_ratio[]"]').value),
      animation_json: getAnimationConfig(card),
      x: Number(card.querySelector('[name="region_x[]"]').value || 0),
      y: Number(card.querySelector('[name="region_y[]"]').value || 0),
      width: Number(card.querySelector('[name="region_width[]"]').value || 0),
      height: Number(card.querySelector('[name="region_height[]"]').value || 0),
      z_index: Number(card.querySelector('[name="region_z[]"]').value || 0)
    };
  }

  function writeCard(card, values) {
    if (values.region_name !== undefined) {
      syncRegionIdentity(card, values.region_name);
    } else if (values.region_key !== undefined) {
      syncRegionIdentity(card, values.region_key);
    } else if (values.label !== undefined) {
      syncRegionIdentity(card, values.label);
    }
    if (values.region_type !== undefined) { card.querySelector('[name="region_type[]"]').value = values.region_type; }
    if (values.lock_ratio !== undefined) { card.querySelector('[name="region_lock_ratio[]"]').value = normalizeLockRatio(values.lock_ratio); }
    if (values.animation_json !== undefined) { writeAnimationConfig(card, values.animation_json); }
    if (values.x !== undefined) { card.querySelector('[name="region_x[]"]').value = Math.round(values.x); }
    if (values.y !== undefined) { card.querySelector('[name="region_y[]"]').value = Math.round(values.y); }
    if (values.width !== undefined) { card.querySelector('[name="region_width[]"]').value = Math.round(values.width); }
    if (values.height !== undefined) { card.querySelector('[name="region_height[]"]').value = Math.round(values.height); }
    if (values.z_index !== undefined) { card.querySelector('[name="region_z[]"]').value = Math.round(values.z_index); }
  }

  function clampRegion(region, size, minSize) {
    var bounds = size || { width: 1920, height: 1080 };
    var minimum = minSize || 12;
    var x = clamp(region.x, 0, bounds.width - minimum);
    var y = clamp(region.y, 0, bounds.height - minimum);
    var width = Math.max(minimum, region.width);
    var height = Math.max(minimum, region.height);
    if (x + width > bounds.width) {
      width = bounds.width - x;
    }
    if (y + height > bounds.height) {
      height = bounds.height - y;
    }
    return { x: Math.round(x), y: Math.round(y), width: Math.round(Math.max(minimum, width)), height: Math.round(Math.max(minimum, height)) };
  }

  function getOverlayRect(overlay) {
    return overlay.getBoundingClientRect();
  }

  function toCanvasPoint(event, overlay, size) {
    var rect = getOverlayRect(overlay);
    var canvasSize = size || { width: 1920, height: 1080 };
    var x = clamp(event.clientX - rect.left, 0, rect.width);
    var y = clamp(event.clientY - rect.top, 0, rect.height);
    return {
      x: Math.round((x / Math.max(rect.width, 1)) * canvasSize.width),
      y: Math.round((y / Math.max(rect.height, 1)) * canvasSize.height)
    };
  }

  function canvasRectToPixels(region, overlay, size) {
    var rect = getOverlayRect(overlay);
    var canvasSize = size || { width: 1920, height: 1080 };
    return {
      left: (region.x / canvasSize.width) * rect.width,
      top: (region.y / canvasSize.height) * rect.height,
      width: (region.width / canvasSize.width) * rect.width,
      height: (region.height / canvasSize.height) * rect.height
    };
  }

  window.templateDesignerUtils = {
    escapeHtml: escapeHtml,
    valueOrDefault: valueOrDefault,
    clamp: clamp,
    getRegionName: getRegionName,
    syncRegionIdentity: syncRegionIdentity,
    readCard: readCard,
    writeCard: writeCard,
    normalizeAnimationConfig: normalizeAnimationConfig,
    formatAnimationConfig: formatAnimationConfig,
    getAnimationConfig: getAnimationConfig,
    writeAnimationConfig: writeAnimationConfig,
    clampRegion: clampRegion,
    getOverlayRect: getOverlayRect,
    toCanvasPoint: toCanvasPoint,
    canvasRectToPixels: canvasRectToPixels,
    normalizeLockRatio: normalizeLockRatio,
    parseLockRatio: parseLockRatio,
    getDefaultRegionSize: getDefaultRegionSize
  };
}());