'use client';
import { create } from 'zustand';
import type { CreateTestCaseInput, TestCase, TestCaseStatus } from '@/lib/test-case';
import { generateCaseNo, normalizeTestCases } from '@/lib/test-case';
import { applyTestCaseTransition, normalizeTestCaseOnCreate } from '@/lib/test-case-workflow';
import { createEntityId, dedupeEntityIds } from '@/lib/entity-id';
import { loadServerData, saveServerData, SERVER_DATA_CACHE_MS } from '@/lib/server-data';
import {
  makeTestCaseCreatedActivity,
  makeTestCaseStatusActivity,
} from '@/lib/work-activity-factory';
import { useWorkActivityStore } from './useWorkActivityStore';

function saveStored(items: TestCase[]) {
  saveServerData('test-cases', items).catch(() => {});
}

let lastTestCasesFetchAt = 0;

async function loadStored(): Promise<TestCase[] | null> {
  try {
    return await loadServerData<TestCase[]>('test-cases');
  } catch {}
  return null;
}

interface TestCaseState {
  testCases: TestCase[];
  loaded: boolean;
  fetchTestCases: (options?: { force?: boolean }) => Promise<void>;
  createTestCase: (data: CreateTestCaseInput) => TestCase;
  createTestCases: (items: CreateTestCaseInput[]) => TestCase[];
  updateTestCase: (id: string, data: Partial<TestCase>) => void;
  deleteTestCase: (id: string) => void;
  changeStatus: (id: string, to: TestCaseStatus, extra?: { failReason?: string; blockReason?: string }) => { ok: boolean; message?: string };
  getByRequirement: (reqId: string) => TestCase[];
  getByVersion: (versionId: string) => TestCase[];
  getByAssignee: (assigneeId: string) => TestCase[];
}

export const useTestCaseStore = create<TestCaseState>((set, get) => ({
  testCases: [],
  loaded: false,

  fetchTestCases: async (options) => {
    if (!options?.force && get().loaded && Date.now() - lastTestCasesFetchAt < SERVER_DATA_CACHE_MS) return;
    const cached = await loadStored();
    if (!options?.force && get().loaded && Date.now() - lastTestCasesFetchAt < SERVER_DATA_CACHE_MS) return;
    lastTestCasesFetchAt = Date.now();
    if (cached) {
      const result = dedupeEntityIds(normalizeTestCases(cached), 'tc');
      if (result.changed) saveStored(result.items);
      set({ testCases: result.items, loaded: true });
    } else {
      set({ loaded: true });
    }
  },

  createTestCase: (data) => {
    const list = get().testCases;
    const now = new Date().toISOString();
    const tc: TestCase = normalizeTestCaseOnCreate({
      ...data,
      id: createEntityId('tc'),
      caseNo: generateCaseNo(list),
      status: 'pending',
      createdAt: now,
      updatedAt: now,
    } as TestCase);
    const updated = [...list, tc];
    set({ testCases: updated, loaded: true });
    saveStored(updated);
    useWorkActivityStore.getState().addActivity(makeTestCaseCreatedActivity(tc, tc.createdBy));
    return tc;
  },

  createTestCases: (items) => {
    if (items.length === 0) return [];
    let list = get().testCases;
    const now = new Date().toISOString();
    const created: TestCase[] = [];
    for (const data of items) {
      const tc: TestCase = normalizeTestCaseOnCreate({
        ...data,
        id: createEntityId('tc'),
        caseNo: generateCaseNo(list),
        status: 'pending',
        createdAt: now,
        updatedAt: now,
      } as TestCase);
      created.push(tc);
      list = [...list, tc];
    }
    set({ testCases: list, loaded: true });
    saveStored(list);
    created.forEach((tc) => {
      useWorkActivityStore.getState().addActivity(makeTestCaseCreatedActivity(tc, tc.createdBy));
    });
    return created;
  },

  updateTestCase: (id, data) => {
    const updated = get().testCases.map((c) =>
      c.id === id ? { ...c, ...data, aiDraft: false, updatedAt: new Date().toISOString() } : c,
    );
    set({ testCases: updated, loaded: true });
    saveStored(updated);
  },

  deleteTestCase: (id) => {
    const updated = get().testCases.filter((c) => c.id !== id);
    set({ testCases: updated, loaded: true });
    saveStored(updated);
  },

  changeStatus: (id, to, extra) => {
    const tc = get().testCases.find((c) => c.id === id);
    if (!tc) return { ok: false, message: '用例不存在' };
    const result = applyTestCaseTransition(tc, to, {
      now: new Date(),
      failReason: extra?.failReason,
      blockReason: extra?.blockReason,
    });
    if (!result.ok || !result.patch) return { ok: false, message: result.message };
    get().updateTestCase(id, result.patch);
    const actorId = tc.assigneeId || tc.executedBy || tc.createdBy;
    const activity = makeTestCaseStatusActivity(tc, tc.status, to, actorId);
    if (activity) useWorkActivityStore.getState().addActivity(activity);
    return { ok: true };
  },

  getByRequirement: (reqId) => {
    return get().testCases.filter((c) => c.requirementId === reqId);
  },

  getByVersion: (versionId) => {
    return get().testCases.filter((c) => c.versionId === versionId);
  },

  getByAssignee: (assigneeId) => {
    return get().testCases.filter((c) => c.assigneeId === assigneeId);
  },
}));