import { describe, expect, it, vi, beforeEach } from 'vitest';
import { act, render, screen, waitFor } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import React from 'react';

import { PermissionPanel } from '../../src/components/MailView';
import * as api from '../../src/api/client';
import { useMailStore } from '../../src/stores/mailStore';
import { useSessionStore } from '../../src/stores/sessionStore';
import type { Mail } from '../../src/types';

/**
 * 权限决策面板。
 *
 * 这是全站唯一一处「人的一次点击直接放行 Agent 的危险操作」，
 * 因此断言集中在两件事：
 *   - 点下去到底把什么发给了服务端（选项原文，不是归一化后的 allow/deny）
 *   - 已决策的请求不能再点第二次
 */

function permMail(over: Partial<Mail> = {}): Mail {
  return {
    mail_id: 'm-1',
    session_id: 's-1',
    parent_mail_id: null,
    from_name: 'dsh',
    from_workspace: '/home/program/agentmail',
    to_name: 'admin',
    to_workspace: '',
    cc_list: [],
    subject: '请求批准：删除 build/',
    body: '将执行 rm -rf build/',
    mail_type: 'permission_request',
    permission_options: undefined,
    permission_result: '',
    status: 'unread',
    created_at: '2026-09-03T00:00:00Z',
    hop_limit: 5,
    ...over
  } as Mail;
}

describe('PermissionPanel 决策', () => {
  beforeEach(() => {
    vi.restoreAllMocks();
    // fetchInbox / selectSession 会打网络，替换成空实现
    useMailStore.setState({ fetchInbox: vi.fn(async () => {}) } as any);
    useSessionStore.setState({ selectSession: vi.fn(async () => {}) } as any);
  });

  it('没有 permission_options 时给默认的同意/拒绝两个选项', () => {
    render(React.createElement(PermissionPanel, { mail: permMail() }));

    expect(screen.getByRole('button', { name: /同意/ })).toBeInTheDocument();
    expect(screen.getByRole('button', { name: /拒绝/ })).toBeInTheDocument();
  });

  it('有 permission_options 时用它，且顺序保持', () => {
    render(
      React.createElement(PermissionPanel, {
        mail: permMail({ permission_options: ['只这一次', '总是允许', '拒绝'] })
      })
    );

    const btns = screen.getAllByRole('button').map(b => b.textContent?.trim());
    // 顺序是 Agent 给的语义顺序，重排会让「拒绝」跑到人的手指默认位置上
    expect(btns).toEqual(['只这一次', '总是允许', '拒绝']);
  });

  it('点选项时把【选项原文】发给服务端', async () => {
    const spy = vi.spyOn(api, 'decidePermission').mockResolvedValue({ status: 'decided' } as any);
    render(
      React.createElement(PermissionPanel, {
        mail: permMail({ permission_options: ['只这一次', '拒绝'] })
      })
    );

    await userEvent.click(screen.getByRole('button', { name: /只这一次/ }));

    // 关键：不能归一化成 allow/deny —— 「只这一次」与「总是允许」的区别
    // 只有 Agent 侧的权限机制懂，服务端与前端都不该替它翻译
    await waitFor(() =>
      expect(spy).toHaveBeenCalledWith('m-1', '只这一次', undefined)
    );
  });

  it('填了备注时一起发出去', async () => {
    const spy = vi.spyOn(api, 'decidePermission').mockResolvedValue({ status: 'decided' } as any);
    render(React.createElement(PermissionPanel, { mail: permMail() }));

    await userEvent.type(screen.getByPlaceholderText('备注（可选）'), '只删 build，别动 dist');
    await userEvent.click(screen.getByRole('button', { name: /同意/ }));

    await waitFor(() =>
      expect(spy).toHaveBeenCalledWith('m-1', '同意', '只删 build，别动 dist')
    );
  });

  it('备注为空时传 undefined 而不是空字符串', async () => {
    const spy = vi.spyOn(api, 'decidePermission').mockResolvedValue({ status: 'decided' } as any);
    render(React.createElement(PermissionPanel, { mail: permMail() }));

    await userEvent.click(screen.getByRole('button', { name: /同意/ }));

    // 空串会在决策邮件里留一行空的「备注：」
    await waitFor(() => expect(spy).toHaveBeenCalledWith('m-1', '同意', undefined));
  });

  it('决策后变成「已处理」，不再显示按钮', async () => {
    vi.spyOn(api, 'decidePermission').mockResolvedValue({ status: 'decided' } as any);
    render(React.createElement(PermissionPanel, { mail: permMail() }));

    await userEvent.click(screen.getByRole('button', { name: /同意/ }));

    await waitFor(() => expect(screen.getByText('已处理：')).toBeInTheDocument());
    // 还能点第二次的话人会以为第一次没生效，而服务端那边早已决策
    expect(screen.queryByRole('button')).toBeNull();
  });

  it('已经有 permission_result 的邮件直接显示结论', () => {
    render(
      React.createElement(PermissionPanel, {
        mail: permMail({ permission_result: '拒绝' })
      })
    );

    expect(screen.getByText('拒绝')).toBeInTheDocument();
    expect(screen.queryByRole('button')).toBeNull();
  });

  it('提交中禁用所有按钮，避免重复决策', async () => {
    let release: (v: any) => void = () => {};
    vi.spyOn(api, 'decidePermission').mockReturnValue(
      new Promise(res => {
        release = res;
      }) as any
    );
    render(React.createElement(PermissionPanel, { mail: permMail() }));

    await userEvent.click(screen.getByRole('button', { name: /同意/ }));

    // 一次危险操作被批准两次，Agent 那边可能真的执行两遍
    await waitFor(() => {
      for (const b of screen.getAllByRole('button')) {
        expect(b).toBeDisabled();
      }
    });

    // 收尾：让悬挂的 Promise 落定并等状态更新走完，
    // 否则组件在测试结束后才 setState，React 会报 act 警告
    await act(async () => {
      release({ status: 'decided' });
    });
    await waitFor(() => expect(screen.getByText('已处理：')).toBeInTheDocument());
  });

  it('提交失败时恢复可点，不假装已决策', async () => {
    vi.spyOn(api, 'decidePermission').mockRejectedValue(new Error('500'));
    vi.spyOn(console, 'error').mockImplementation(() => {});
    render(React.createElement(PermissionPanel, { mail: permMail() }));

    await userEvent.click(screen.getByRole('button', { name: /同意/ }));

    // 失败后显示「已处理」是最糟的结果：人以为批过了，Agent 还在等
    await waitFor(() => expect(screen.getByRole('button', { name: /同意/ })).toBeEnabled());
    expect(screen.queryByText('已处理：')).toBeNull();
  });

  it('决策成功后刷新收件箱并选中该会话', async () => {
    vi.spyOn(api, 'decidePermission').mockResolvedValue({ status: 'decided' } as any);
    const fetchInbox = vi.fn(async () => {});
    const selectSession = vi.fn(async () => {});
    useMailStore.setState({ fetchInbox } as any);
    useSessionStore.setState({ selectSession } as any);

    render(React.createElement(PermissionPanel, { mail: permMail() }));
    await userEvent.click(screen.getByRole('button', { name: /同意/ }));

    // 不刷新的话列表里那封还是「未读的权限请求」，人会以为没生效
    await waitFor(() => {
      expect(fetchInbox).toHaveBeenCalledWith('all');
      expect(selectSession).toHaveBeenCalledWith('s-1');
    });
  });

  it('同意类选项用绿色，其余用红色', () => {
    render(
      React.createElement(PermissionPanel, {
        mail: permMail({ permission_options: ['允许', 'approve', '拒绝', '算了'] })
      })
    );

    const cls = (name: string) =>
      screen.getByRole('button', { name: new RegExp(name) }).className;

    // 颜色是唯一的视觉提示：点错一次就放行了一个危险操作
    expect(cls('允许')).toContain('bg-green-600');
    expect(cls('approve')).toContain('bg-green-600');
    expect(cls('拒绝')).toContain('text-red-700');
    // 不在同意词表里的一律按「否」处理 —— 宁可让人多看一眼
    expect(cls('算了')).toContain('text-red-700');
  });
});