import { afterEach, describe, expect, it } from 'vitest';
import { getDefaultQueryOption, resetConfig, setConfig } from '../src/config.js';
import {
  applyFilters,
  buildFilters,
  createFieldState,
  groupRows,
  resolveQueryOption,
} from '../src/composables/useFilters.js';

// 每个用例后恢复全局配置，避免 setConfig 污染其它用例
afterEach(() => {
  resetConfig();
});

const schema = [
  {
    row: 6,
    field: 'name',
    'field-name': '名称',
    'query-option': [{ value: 'EQ', label: '=' }],
  },
  {
    row: 6,
    logic: 'OR',
    field: 'status',
    'query-option': [{ value: 'NE', label: '≠' }],
  },
];

describe('createFieldState', () => {
  it('initializes default query from first option', () => {
    const state = createFieldState(schema);
    expect(state.name.query).toBe('EQ');
    expect(state.status.logic).toBe('OR');
  });
});

describe('buildFilters', () => {
  it('emits logic from second item onward', () => {
    const state = createFieldState(schema);
    state.name.value = 'alice';
    state.status.value = 'active';
    const filters = buildFilters(schema, state);
    expect(filters[0].logic).toBeUndefined();
    expect(filters[1].logic).toBe('OR');
  });

  it('marks empty values', () => {
    const state = createFieldState(schema);
    const filters = buildFilters(schema, state);
    expect(filters[0].empty).toBe(true);
    expect(filters[0].value).toBeNull();
  });
});

describe('applyFilters', () => {
  it('loads filters back into state', () => {
    const loaded = applyFilters(schema, [
      { field: 'name', value: 'bob', query: 'EQ' },
    ]);
    expect(loaded.name.value).toBe('bob');
  });
});

describe('groupRows', () => {
  it('wraps when row spans exceed 12', () => {
    const groups = groupRows([
      { row: 2, field: 'a' },
      { row: 9, field: 'b' },
      { row: 4, field: 'c' },
    ]);
    expect(groups).toHaveLength(2);
    expect(groups[0]).toHaveLength(2);
    expect(groups[1]).toHaveLength(1);
  });
});

describe('resolveQueryOption（默认 query-option 解析）', () => {
  it('无 query-option 且无 query-component 时返回默认操作符列表', () => {
    const opts = resolveQueryOption({ field: 'name' });
    expect(opts).toHaveLength(12);
    expect(opts[0]).toEqual({ value: 'EQ', label: '=' });
    expect(opts.map((o) => o.value)).toEqual([
      'EQ', 'NE', 'GT', 'GTE', 'LT', 'LTE',
      'LIKE', 'IN', 'NOT_IN', 'BETWEEN', 'IS_NULL', 'IS_NOT_NULL',
    ]);
  });

  it('有 query-option 的字段仍用 schema 自己的（不被默认覆盖）', () => {
    const fieldDef = { field: 'name', 'query-option': [{ value: 'NE', label: '≠' }] };
    expect(resolveQueryOption(fieldDef)).toEqual([{ value: 'NE', label: '≠' }]);
  });

  it('有 query-component 但无 query-option 时返回空数组（组件自己管理）', () => {
    const fieldDef = { field: 'name', 'query-component': 'CustomQuery' };
    expect(resolveQueryOption(fieldDef)).toEqual([]);
  });

  it('getDefaultQueryOption() 返回深拷贝：修改返回值不影响后续调用', () => {
    const first = getDefaultQueryOption();
    first.push({ value: 'X', label: 'x' });
    first[0].label = '被改坏了';
    first.splice(1, 1);

    const second = getDefaultQueryOption();
    expect(second).toHaveLength(12);
    expect(second[0]).toEqual({ value: 'EQ', label: '=' });
    expect(second[1]).toEqual({ value: 'NE', label: '≠' });
  });

  it('setConfig({ queryOption }) 后 getDefaultQueryOption() 返回新列表', () => {
    setConfig({
      queryOption: [
        { value: 'EQ', label: '=' },
        { value: 'GT', label: '>' },
      ],
    });
    expect(getDefaultQueryOption()).toEqual([
      { value: 'EQ', label: '=' },
      { value: 'GT', label: '>' },
    ]);
  });

  it('resetConfig() 恢复默认操作符列表', () => {
    setConfig({ queryOption: [{ value: 'ONLY_EQ', label: '=' }] });
    resetConfig();
    expect(getDefaultQueryOption()).toHaveLength(12);
    expect(getDefaultQueryOption()[0]).toEqual({ value: 'EQ', label: '=' });
  });
});

describe('默认 query fallback（无 query-option 时取默认列表第一项）', () => {
  it('createFieldState：无 query-option 且无 query-component 默认取默认列表第一项（EQ）', () => {
    const state = createFieldState([{ field: 'name' }]);
    expect(state.name.query).toBe('EQ');
  });

  it('buildFilters：无 query-option 且无 query-component 默认取默认列表第一项（EQ）', () => {
    const state = createFieldState([{ field: 'name' }]);
    const filters = buildFilters([{ field: 'name' }], state);
    expect(filters[0].query).toBe('EQ');
  });

  it('setConfig 自定义 queryOption 后，默认 query 取新列表第一项', () => {
    setConfig({ queryOption: [{ value: 'GT', label: '>' }] });
    const state = createFieldState([{ field: 'age' }]);
    expect(state.age.query).toBe('GT');
    expect(buildFilters([{ field: 'age' }], state)[0].query).toBe('GT');
  });

  it('有 query-component 但无 query-option 时，默认 query 仍为 EQ', () => {
    const state = createFieldState([{ field: 'custom', 'query-component': 'CustomQuery' }]);
    expect(state.custom.query).toBe('EQ');
  });

  it('显式 default-query 优先级最高，覆盖默认列表第一项', () => {
    const state = createFieldState([{ field: 'name', 'default-query': 'LIKE' }]);
    expect(state.name.query).toBe('LIKE');
  });
});