import { describe, expect, it } from 'vitest';
import { clearFlag, flagsToMetadata, hasFlag, setFlag, shouldCountInBudget, shouldCountInStats, toggleFlag, TransactionFlag } from '../src/domain/transactionFlags';
import { DEFAULT_FILTER, mergeFilter, passesKeywordFilter } from '../src/domain/keywordFilter';
import { generateRemark, normalizeAdjacentDuplicates } from '../src/domain/remarkTemplate';
import { FunctionSandboxExecutor, RuleEngine, type EnhancedRule } from '../src/domain/ruleEngine';
import type { ImportedEvent } from '../src/domain/types';

const evt = (over: Partial<ImportedEvent> = {}): ImportedEvent => ({
  id: 'e1', occurredAt: '2026-02-01T10:00:00', amount: '100', currency: 'CNY', direction: 'expense',
  channel: 'Alipay', counterparty: '', memo: '', raw: {},
  ...over,
});

describe('transactionFlags', () => {
  it('setFlag / hasFlag', () => {
    let f = TransactionFlag.NONE;
    f = setFlag(f, TransactionFlag.EXCLUDE_FROM_STATS);
    expect(hasFlag(f, TransactionFlag.EXCLUDE_FROM_STATS)).toBe(true);
    expect(hasFlag(f, TransactionFlag.EXCLUDE_FROM_BUDGET)).toBe(false);
  });

  it('clearFlag', () => {
    let f = setFlag(TransactionFlag.NONE, TransactionFlag.TRANSFER);
    f = clearFlag(f, TransactionFlag.TRANSFER);
    expect(hasFlag(f, TransactionFlag.TRANSFER)).toBe(false);
  });

  it('toggleFlag', () => {
    let f = TransactionFlag.NONE;
    f = toggleFlag(f, TransactionFlag.RECURRING);
    expect(hasFlag(f, TransactionFlag.RECURRING)).toBe(true);
    f = toggleFlag(f, TransactionFlag.RECURRING);
    expect(hasFlag(f, TransactionFlag.RECURRING)).toBe(false);
  });

  it('shouldCountInStats / shouldCountInBudget', () => {
    const f = setFlag(TransactionFlag.NONE, TransactionFlag.EXCLUDE_FROM_STATS);
    expect(shouldCountInStats(f)).toBe(false);
    expect(shouldCountInBudget(f)).toBe(true);  // 未设置 budget 标志
  });

  it('flagsToMetadata', () => {
    const f = setFlag(setFlag(TransactionFlag.NONE, TransactionFlag.EXCLUDE_FROM_STATS), TransactionFlag.TRANSFER);
    const meta = flagsToMetadata(f);
    expect(meta['bm-exclude-stats']).toBe('true');
    expect(meta['bm-transfer']).toBe('true');
    expect(meta['bm-recurring']).toBeUndefined();
  });
});

describe('keywordFilter', () => {
  it('账单内容通过', () => {
    expect(passesKeywordFilter('微信支付 24.50元 消费')).toBe(true);
  });

  it('广告被拒', () => {
    expect(passesKeywordFilter('限时优惠广告')).toBe(false);
  });

  it('空文本被拒', () => {
    expect(passesKeywordFilter('')).toBe(false);
  });

  it('mergeFilter 用户优先', () => {
    const merged = mergeFilter({ whitelist: ['自定义'] });
    expect(merged.whitelist).toEqual(['自定义']);
    expect(merged.blacklist).toEqual(DEFAULT_FILTER.blacklist);
  });
});

describe('remarkTemplate', () => {
  it('占位符替换', () => {
    const event = evt({ counterparty: '咖啡店', amount: '24.50' });
    const remark = generateRemark('【商户名称】-【金额】', event);
    expect(remark).toBe('咖啡店-24.50');
  });

  it('相邻重复归一化', () => {
    expect(normalizeAdjacentDuplicates('买菜买菜')).toBe('买菜');
    expect(normalizeAdjacentDuplicates('京东自营京东自营旗舰店')).toBe('京东自营旗舰店');
  });

  it('日期/时间占位符', () => {
    const event = evt({ occurredAt: '2026-07-13T14:30:00' });
    expect(generateRemark('【日期】 【时间】', event)).toBe('2026-07-13 14:30');
  });
});

describe('ruleEngine', () => {
  it('静态条件匹配（无 JS）', () => {
    const engine = new RuleEngine();
    const rules: EnhancedRule[] = [{
      id: 'r1', name: '咖啡', priority: 10, enabled: true, isSystem: false,
      counterpartyContains: '咖啡', channelAccount: 'Assets:Alipay', categoryAccount: 'Expenses:Food', hits: 0,
    }];
    const result = engine.matchEvent(evt({ counterparty: '星巴克咖啡' }), rules);
    expect(result?.rule.id).toBe('r1');
    expect(result?.rule.hits).toBe(1);
  });

  it('JS 规则执行（命中）', () => {
    const engine = new RuleEngine(new FunctionSandboxExecutor());
    const rules: EnhancedRule[] = [{
      id: 'r1', name: 'JS规则', priority: 10, enabled: true, isSystem: false,
      jsCode: 'print(JSON.stringify({money: data.money, shopName: data.shopName}))',
      channelAccount: 'Assets:Alipay', categoryAccount: 'Expenses:Food', hits: 0,
    }];
    const result = engine.matchEvent(evt({ amount: '50', counterparty: '测试' }), rules);
    expect(result?.result.matched).toBe(true);
    expect(result?.result.extracted?.shopName).toBe('测试');
  });

  it('JS 规则不命中（金额 0）', () => {
    const engine = new RuleEngine(new FunctionSandboxExecutor());
    const rules: EnhancedRule[] = [{
      id: 'r1', name: 'JS规则', priority: 10, enabled: true, isSystem: false,
      jsCode: 'print(JSON.stringify({money: 0}))',
      channelAccount: 'Assets:Alipay', categoryAccount: 'Expenses:Food', hits: 0,
    }];
    const result = engine.matchEvent(evt({ amount: '50' }), rules);
    expect(result).toBeNull();
  });

  it('用户规则优先于系统规则', () => {
    const engine = new RuleEngine();
    const rules: EnhancedRule[] = [
      { id: 'sys', name: '系统', priority: 100, enabled: true, isSystem: true, channelAccount: 'A1', categoryAccount: 'C1', hits: 0 },
      { id: 'usr', name: '用户', priority: 1, enabled: true, isSystem: false, channelAccount: 'A2', categoryAccount: 'C2', hits: 0 },
    ];
    const result = engine.matchEvent(evt(), rules);
    expect(result?.rule.id).toBe('usr');  // 用户优先，即使 priority 低
  });
});