/**
 * 컴포넌트 기본값 및 복원 유틸리티
 * 
 * screen_layouts_v2 테이블의 config_overrides를 기본값과 병합하여
 * 전체 componentConfig를 복원합니다.
 */

// 컴포넌트별 기본값 맵
export const componentDefaults: Record<string, any> = {
  "button-primary": {
    type: "button-primary",
    text: "저장",
    actionType: "button",
    variant: "primary",
    webType: "button",
  },
  "v2-button-primary": {
    type: "v2-button-primary",
    text: "저장",
    actionType: "button",
    variant: "primary",
    webType: "button",
  },
  "text-input": {
    type: "text-input",
    webType: "text",
    format: "none",
    multiline: false,
    placeholder: "텍스트를 입력하세요",
  },
  "number-input": {
    type: "number-input",
    webType: "number",
    placeholder: "숫자를 입력하세요",
  },
  "date-input": {
    type: "date-input",
    webType: "date",
    format: "YYYY-MM-DD",
    showTime: false,
    placeholder: "날짜를 선택하세요",
  },
  "select-basic": {
    type: "select-basic",
    webType: "code",
    placeholder: "선택하세요",
    options: [],
  },
  "file-upload": {
    type: "file-upload",
    webType: "file",
    placeholder: "입력하세요",
  },
  "table-list": {
    type: "table-list",
    webType: "table",
    displayMode: "table",
    showHeader: true,
    showFooter: true,
    autoLoad: true,
    autoWidth: true,
    stickyHeader: false,
    height: "auto",
    columns: [],
    pagination: {
      enabled: true,
      pageSize: 20,
      showSizeSelector: true,
      showPageInfo: true,
      pageSizeOptions: [10, 20, 50, 100],
    },
    checkbox: {
      enabled: true,
      multiple: true,
      position: "left",
      selectAll: true,
    },
    horizontalScroll: {
      enabled: false,
    },
    filter: {
      enabled: false,
      filters: [],
    },
    actions: {
      showActions: false,
      actions: [],
      bulkActions: false,
      bulkActionList: [],
    },
    tableStyle: {
      theme: "default",
      headerStyle: "default",
      rowHeight: "normal",
      alternateRows: false,
      hoverEffect: true,
      borderStyle: "light",
    },
  },
  "v2-table-list": {
    type: "v2-table-list",
    webType: "table",
    displayMode: "table",
    showHeader: true,
    showFooter: true,
    autoLoad: true,
    autoWidth: true,
    stickyHeader: false,
    height: "auto",
    columns: [],
    pagination: {
      enabled: true,
      pageSize: 20,
      showSizeSelector: true,
      showPageInfo: true,
      pageSizeOptions: [10, 20, 50, 100],
    },
    checkbox: {
      enabled: true,
      multiple: true,
      position: "left",
      selectAll: true,
    },
    horizontalScroll: { enabled: false },
    filter: { enabled: false, filters: [] },
    actions: { showActions: false, actions: [], bulkActions: false, bulkActionList: [] },
    tableStyle: { theme: "default", headerStyle: "default", rowHeight: "normal", alternateRows: false, hoverEffect: true, borderStyle: "light" },
  },
  "table-search-widget": { type: "table-search-widget", webType: "custom" },
  "split-panel-layout": { type: "split-panel-layout", webType: "text", autoLoad: true, resizable: true, splitRatio: 30 },
  "v2-split-panel-layout": { type: "v2-split-panel-layout", webType: "custom" },
  "tabs-widget": { type: "tabs-widget", webType: "text", tabs: [] },
  "v2-tabs-widget": { type: "v2-tabs-widget", webType: "custom", tabs: [] },
  "flow-widget": { type: "flow-widget", webType: "text", displayMode: "horizontal", allowDataMove: false, showStepCount: true },
  "entity-search-input": { type: "entity-search-input", webType: "entity" },
  "autocomplete-search-input": { type: "autocomplete-search-input", webType: "entity" },
  "unified-list": { type: "unified-list", webType: "table" },
  "modal-repeater-table": { type: "modal-repeater-table", webType: "table", columns: [], multiSelect: true },
  "category-manager": { type: "category-manager", webType: "custom" },
  "numbering-rule": { type: "numbering-rule", webType: "text" },
  "conditional-container": { type: "conditional-container", webType: "custom" },
  "selected-items-detail-input": { type: "selected-items-detail-input", webType: "custom" },
  "text-display": { type: "text-display", webType: "text" },
  "image-widget": { type: "image-widget", webType: "image" },
  "textarea-basic": { type: "textarea-basic", webType: "textarea", placeholder: "내용을 입력하세요" },
  "checkbox-basic": { type: "checkbox-basic", webType: "checkbox" },
  "radio-basic": { type: "radio-basic", webType: "radio" },
  "divider-line": { type: "divider-line", webType: "custom" },
  "section-paper": { type: "section-paper", webType: "custom" },
  "section-card": { type: "section-card", webType: "custom" },
  "card-display": { type: "card-display", webType: "custom" },
  "pivot-grid": { type: "pivot-grid", webType: "table" },
  "rack-structure": { type: "rack-structure", webType: "custom" },
  "v2-rack-structure": { type: "v2-rack-structure", webType: "custom" },
  "location-swap-selector": { type: "location-swap-selector", webType: "custom" },
  "screen-split-panel": { type: "screen-split-panel", webType: "custom" },
  "universal-form-modal": { type: "universal-form-modal", webType: "custom" },
  "repeater-field-group": { type: "repeater-field-group", webType: "custom" },
  "repeat-screen-modal": { type: "repeat-screen-modal", webType: "custom" },
  "related-data-buttons": { type: "related-data-buttons", webType: "custom" },
  "split-panel-layout2": { type: "split-panel-layout2", webType: "custom" },
  "unified-input": { type: "unified-input", webType: "text" },
  "unified-select": { type: "unified-select", webType: "select" },
  "unified-date": { type: "unified-date", webType: "date" },
  "unified-repeater": { type: "unified-repeater", webType: "custom" },
  "v2-repeat-container": { type: "v2-repeat-container", webType: "custom" },
};

/**
 * 컴포넌트 기본값 조회
 */
export function getComponentDefaults(componentType: string): any {
  return componentDefaults[componentType] || {};
}

/**
 * 설정 복원: 기본값 + overrides 병합
 * 
 * @param componentType 컴포넌트 타입
 * @param overrides 저장된 차이값 (config_overrides)
 * @returns 복원된 전체 설정
 */
export function reconstructConfig(componentType: string, overrides: any): any {
  const defaults = getComponentDefaults(componentType);
  
  if (!overrides || Object.keys(overrides).length === 0) {
    return { ...defaults };
  }
  
  // _originalKeys가 있으면 해당 키만 복원
  const originalKeys = overrides._originalKeys;
  
  if (originalKeys && Array.isArray(originalKeys)) {
    const result: any = {};
    for (const key of originalKeys) {
      if (key === "_originalKeys") continue;
      if (Object.prototype.hasOwnProperty.call(overrides, key)) {
        result[key] = overrides[key];
      } else if (Object.prototype.hasOwnProperty.call(defaults, key)) {
        result[key] = defaults[key];
      }
    }
    return result;
  }
  
  // _originalKeys가 없으면 단순 병합
  return { ...defaults, ...overrides };
}

/**
 * 깊은 비교 함수
 */
export function isDeepEqual(a: any, b: any): boolean {
  if (a === b) return true;
  if (a == null || b == null) return a === b;
  if (typeof a !== typeof b) return false;
  if (typeof a !== "object") return a === b;
  
  if (Array.isArray(a) !== Array.isArray(b)) return false;
  if (Array.isArray(a)) {
    if (a.length !== b.length) return false;
    for (let i = 0; i < a.length; i++) {
      if (!isDeepEqual(a[i], b[i])) return false;
    }
    return true;
  }
  
  const keysA = Object.keys(a);
  const keysB = Object.keys(b);
  
  if (keysA.length !== keysB.length) return false;
  
  for (const key of keysA) {
    if (!keysB.includes(key)) return false;
    if (!isDeepEqual(a[key], b[key])) return false;
  }
  
  return true;
}

/**
 * 차이값 추출: 현재 설정에서 기본값과 다른 것만 추출
 */
export function extractConfigDiff(componentType: string, currentConfig: any): any {
  const defaults = getComponentDefaults(componentType);
  
  if (!currentConfig) return {};
  
  const diff: any = {
    _originalKeys: Object.keys(currentConfig),
  };
  
  for (const key of Object.keys(currentConfig)) {
    const defaultVal = defaults[key];
    const currentVal = currentConfig[key];
    
    if (!isDeepEqual(defaultVal, currentVal)) {
      diff[key] = currentVal;
    }
  }
  
  return diff;
}