import { fireEvent, render, screen, waitFor } from '@testing-library/react';
import { beforeEach, describe, expect, it, vi } from 'vitest';
import { resetStore } from '../test/storeTestUtils';
import { useStore } from '../store/useStore';
import { TemplateRegistry } from './TemplateRegistry';

const apiMock = vi.hoisted(() => ({
  getTemplates: vi.fn(),
  createTemplate: vi.fn(),
  updateTemplate: vi.fn(),
  deleteTemplate: vi.fn(),
}));

vi.mock('../lib/api', () => ({
  getTemplates: apiMock.getTemplates,
  createTemplate: apiMock.createTemplate,
  updateTemplate: apiMock.updateTemplate,
  deleteTemplate: apiMock.deleteTemplate,
}));

describe('TemplateRegistry', () => {
  const makeDataTransfer = () => {
    const store = new Map<string, string>();
    return {
      effectAllowed: '',
      dropEffect: '',
      setData: vi.fn((key: string, value: string) => store.set(key, value)),
      getData: vi.fn((key: string) => store.get(key) || ''),
    };
  };

  beforeEach(() => {
    resetStore();
    vi.clearAllMocks();
  });

  it('loads and displays templates with unpacked classes', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '腹腔镜胆囊切除术',
        description: 'desc',
        classes: [{ id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, category: '器官' }],
        rules: [],
      },
    ]);

    render(<TemplateRegistry />);

    expect(await screen.findAllByText('腹腔镜胆囊切除术')).toHaveLength(2);
    expect(screen.getByText('胆囊')).toBeInTheDocument();
    expect(screen.getAllByText(/maskid: ?1/).length).toBeGreaterThan(0);
    expect(screen.getByText('待分类')).toBeInTheDocument();
    expect(screen.getAllByText(/maskid: ?0/).length).toBeGreaterThan(0);
    expect(screen.queryByText(/Z-Level/)).not.toBeInTheDocument();
  });

  it('creates a template and stores it globally', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([]);
    apiMock.createTemplate.mockResolvedValueOnce({
      id: 't2',
      name: 'New Template',
      description: 'desc',
      classes: [expect.objectContaining({ name: '待分类', maskId: 0, color: '#000000' })],
      rules: [],
    });

    render(<TemplateRegistry />);
    fireEvent.click(screen.getByText('新建方案'));
    fireEvent.change(screen.getAllByRole('textbox')[0], { target: { value: 'New Template' } });
    fireEvent.change(screen.getAllByRole('textbox')[1], { target: { value: 'desc' } });
    fireEvent.click(screen.getByRole('button', { name: '保存' }));

    await waitFor(() => expect(apiMock.createTemplate).toHaveBeenCalledWith(expect.objectContaining({
      name: 'New Template',
      description: 'desc',
      classes: [
        expect.objectContaining({
          id: 'reserved-unclassified',
          name: '待分类',
          color: '#000000',
          zIndex: 0,
          maskId: 0,
        }),
      ],
      rules: [],
      color: '#06b6d4',
      z_index: 0,
    })));
    expect(useStore.getState().templates[0]).toEqual(expect.objectContaining({ id: 't2' }));
  });

  it('imports JSON classes into the edit modal before saving', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([]);

    render(<TemplateRegistry />);
    fireEvent.click(screen.getByText('新建方案'));
    fireEvent.change(screen.getAllByRole('textbox')[0], { target: { value: 'With Classes' } });
    fireEvent.click(screen.getByText('批量导入'));
    expect(screen.queryByText('📋 载入腹腔镜胆囊切除术模板')).not.toBeInTheDocument();
    fireEvent.change(screen.getByPlaceholderText('[[[255,0,0], [0,255,0]], ["分类A", "分类B"]]'), {
      target: { value: '{"colors":[[255,0,0]],"names":["分类A"]}' },
    });
    expect(screen.getByText(/将导入 1 个分类，maskid 从 1 开始分配/)).toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: '导入' }));

    expect(screen.getByText('分类A')).toBeInTheDocument();
  });

  it('imports the array colors/names format into the edit modal', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([]);

    render(<TemplateRegistry />);
    fireEvent.click(screen.getByText('新建方案'));
    fireEvent.click(screen.getByText('批量导入'));
    fireEvent.change(screen.getByPlaceholderText('[[[255,0,0], [0,255,0]], ["分类A", "分类B"]]'), {
      target: { value: '[[[255,0,0], [0,255,0]], ["分类A", "分类B"]]' },
    });

    expect(screen.getByText(/将导入 2 个分类，maskid 从 1 开始分配/)).toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: '导入' }));

    expect(screen.getByText('分类A')).toBeInTheDocument();
    expect(screen.getByText('分类B')).toBeInTheDocument();
  });

  it('imports pasted color/name content with a label prefix and loose object keys', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([]);

    render(<TemplateRegistry />);
    fireEvent.click(screen.getByText('新建方案'));
    fireEvent.click(screen.getByText('批量导入'));
    fireEvent.change(screen.getByPlaceholderText('[[[255,0,0], [0,255,0]], ["分类A", "分类B"]]'), {
      target: {
        value: `批量导入分类：{
          colors: [[255，0，0], [0，255，0],],
          names: ['分类A', '分类B',],
        }`,
      },
    });

    expect(screen.getByText(/将导入 2 个分类，maskid 从 1 开始分配/)).toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: '导入' }));

    expect(screen.getByText('分类A')).toBeInTheDocument();
    expect(screen.getByText('分类B')).toBeInTheDocument();
  });

  it('shows JSON import errors inline instead of blocking alerts', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([]);

    render(<TemplateRegistry />);
    fireEvent.click(screen.getByText('新建方案'));
    fireEvent.click(screen.getByText('批量导入'));
    fireEvent.change(screen.getByPlaceholderText('[[[255,0,0], [0,255,0]], ["分类A", "分类B"]]'), {
      target: { value: '{broken-json' },
    });

    expect(screen.getByText('JSON 解析失败')).toBeInTheDocument();
    expect(screen.getByRole('button', { name: '导入' })).toBeDisabled();
  });

  it('shows template save errors as transient notices', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([]);
    apiMock.createTemplate.mockRejectedValueOnce(new Error('boom'));

    render(<TemplateRegistry />);
    fireEvent.click(screen.getByText('新建方案'));
    fireEvent.change(screen.getAllByRole('textbox')[0], { target: { value: 'Bad Template' } });
    fireEvent.click(screen.getByRole('button', { name: '保存' }));

    expect(await screen.findByRole('status')).toHaveTextContent('保存失败，请查看控制台');
  });

  it('edits an existing template through the backend and store', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '旧模板',
        description: 'old desc',
        classes: [{ id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, category: '器官' }],
        rules: [],
        color: '#06b6d4',
        z_index: 3,
      },
    ]);
    apiMock.updateTemplate.mockResolvedValueOnce({
      id: 't1',
      name: '新模板',
      description: 'new desc',
      classes: [{ id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, category: '器官' }],
      rules: [],
    });

    render(<TemplateRegistry />);
    fireEvent.click(await screen.findByRole('button', { name: '编辑模板 旧模板' }));
    fireEvent.change(screen.getAllByRole('textbox')[0], { target: { value: '新模板' } });
    fireEvent.change(screen.getAllByRole('textbox')[1], { target: { value: 'new desc' } });
    fireEvent.click(screen.getByRole('button', { name: '保存' }));

    await waitFor(() => expect(apiMock.updateTemplate).toHaveBeenCalledWith('t1', expect.objectContaining({
      name: '新模板',
      description: 'new desc',
      classes: [
        expect.objectContaining({ id: 'c1', name: '胆囊' }),
        expect.objectContaining({ name: '待分类', maskId: 0 }),
      ],
      rules: [],
      color: '#06b6d4',
      z_index: 3,
    })));
    expect(useStore.getState().templates[0]).toEqual(expect.objectContaining({
      id: 't1',
      name: '新模板',
    }));
    expect(await screen.findAllByText('新模板')).toHaveLength(2);
  });

  it('does not expose legacy category metadata while editing template classes', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '模板',
        description: 'desc',
        classes: [{ id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, category: '器官' }],
        rules: [],
        color: '#06b6d4',
        z_index: 3,
      },
    ]);

    render(<TemplateRegistry />);
    fireEvent.click(await screen.findByRole('button', { name: '编辑模板 模板' }));
    fireEvent.click(screen.getAllByText('胆囊').at(-1)!);

    expect(screen.getByDisplayValue('胆囊')).toBeInTheDocument();
    expect(screen.queryByDisplayValue('器官')).not.toBeInTheDocument();
    expect(screen.queryByPlaceholderText('类别')).not.toBeInTheDocument();
  });

  it('shows the semantic tree title and opens the edit-template modal from the detail view', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '模板',
        description: 'desc',
        classes: [{ id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, maskId: 1, category: '器官' }],
        rules: [],
        color: '#06b6d4',
        z_index: 3,
      },
    ]);
    apiMock.updateTemplate.mockResolvedValueOnce({
      id: 't1',
      name: '模板',
      description: 'desc',
      classes: [
        { id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, maskId: 1, category: '器官' },
        { id: 'new-class', name: '新类别', color: '#00ff00', zIndex: 20, maskId: 2, category: '未分类' },
      ],
      rules: [],
      color: '#06b6d4',
      z_index: 3,
    });

    render(<TemplateRegistry />);

    expect(await screen.findByText('语义分类树（拖拽调层级）')).toBeInTheDocument();
    expect(screen.queryByText(/Painter's Algorithm Weight/)).not.toBeInTheDocument();
    expect(screen.queryByText('器官')).not.toBeInTheDocument();

    expect(screen.queryByRole('button', { name: /新建分类/ })).not.toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: '编辑模板' }));
    fireEvent.click(screen.getByRole('button', { name: /添加分类/ }));
    expect(screen.getByDisplayValue('新类别')).toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: '保存' }));

    await waitFor(() => expect(apiMock.updateTemplate).toHaveBeenCalledWith('t1', expect.objectContaining({
      classes: [
        expect.objectContaining({ id: 'c1', name: '胆囊', maskId: 1 }),
        expect.objectContaining({ name: '新类别', maskId: 2, category: '未分类' }),
        expect.objectContaining({ name: '待分类', maskId: 0, color: '#000000' }),
      ],
    })));
  });

  it('deletes a class directly from the semantic tree', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '模板',
        description: 'desc',
        classes: [
          { id: 'c2', name: '肝脏', color: '#00ff00', zIndex: 20, maskId: 2, category: '器官' },
          { id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, maskId: 1, category: '器官' },
        ],
        rules: [],
        color: '#06b6d4',
        z_index: 3,
      },
    ]);
    apiMock.updateTemplate.mockResolvedValueOnce({
      id: 't1',
      name: '模板',
      description: 'desc',
      classes: [
        { id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, maskId: 1, category: '器官' },
        { id: 'reserved-unclassified', name: '待分类', color: '#000000', zIndex: 0, maskId: 0, category: '系统保留' },
      ],
      rules: [],
      color: '#06b6d4',
      z_index: 3,
    });

    render(<TemplateRegistry />);
    fireEvent.click(await screen.findByRole('button', { name: '删除分类 肝脏' }));

    await waitFor(() => expect(apiMock.updateTemplate).toHaveBeenCalledWith('t1', expect.objectContaining({
      classes: [
        expect.objectContaining({ id: 'c1', name: '胆囊', zIndex: 10, maskId: 1 }),
        expect.objectContaining({ name: '待分类', zIndex: 0, maskId: 0 }),
      ],
      color: '#06b6d4',
      z_index: 3,
    })));
    await waitFor(() => expect(useStore.getState().templates[0].classes).toEqual([
      expect.objectContaining({ id: 'c1', name: '胆囊' }),
      expect.objectContaining({ name: '待分类', maskId: 0 }),
    ]));
    expect(await screen.findByRole('status')).toHaveTextContent('分类已删除');
  });

  it('copies a template from the active template list into a new editable template', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '头颈部CT分割',
        description: 'desc',
        classes: [
          { id: 'c1', name: '肿瘤', color: '#ff0000', zIndex: 20, maskId: 1, category: '器官' },
          { id: 'c2', name: '气管', color: '#00ff00', zIndex: 10, maskId: 4, category: '器官' },
        ],
        rules: [{ id: 'r1', name: 'rule', sourceKey: 'a', targetKey: 'b', operation: 'copy' }],
        color: '#ef4444',
        z_index: 10,
      },
      {
        id: 't2',
        name: '头颈部CT分割 副本',
        description: 'existing copy',
        classes: [],
        rules: [],
      },
    ]);
    apiMock.createTemplate.mockResolvedValueOnce({
      id: 't3',
      name: '头颈部CT分割 副本 2',
      description: 'desc',
      classes: [
        { id: 'copy-c1', name: '肿瘤', color: '#ff0000', zIndex: 20, maskId: 1, category: '器官' },
        { id: 'copy-c2', name: '气管', color: '#00ff00', zIndex: 10, maskId: 4, category: '器官' },
      ],
      rules: [{ id: 'r1', name: 'rule', sourceKey: 'a', targetKey: 'b', operation: 'copy' }],
      color: '#ef4444',
      z_index: 10,
    });

    render(<TemplateRegistry />);
    fireEvent.click(await screen.findByRole('button', { name: '复制模板 头颈部CT分割' }));

    await waitFor(() => expect(apiMock.createTemplate).toHaveBeenCalledWith(expect.objectContaining({
      name: '头颈部CT分割 副本 2',
      description: 'desc',
      color: '#ef4444',
      z_index: 10,
      rules: [expect.objectContaining({ id: 'r1' })],
      classes: [
        expect.objectContaining({ name: '肿瘤', color: '#ff0000', zIndex: 20, maskId: 1, category: '器官' }),
        expect.objectContaining({ name: '气管', color: '#00ff00', zIndex: 10, maskId: 4, category: '器官' }),
        expect.objectContaining({ name: '待分类', color: '#000000', zIndex: 0, maskId: 0 }),
      ],
    })));
    const payload = apiMock.createTemplate.mock.calls[0][0];
    expect(payload.classes[0].id).toMatch(/^cls-copy-/);
    expect(payload.classes[0].id).not.toBe('c1');
    expect(useStore.getState().templates.some((template) => template.id === 't3')).toBe(true);
    expect(await screen.findByText('已复制模板：头颈部CT分割 副本 2')).toBeInTheDocument();
  });

  it('persists dragged class layer order directly from the template detail view', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '模板',
        description: 'desc',
        classes: [
          { id: 'c2', name: '肝脏', color: '#00ff00', zIndex: 20, maskId: 2, category: '器官' },
          { id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 10, maskId: 1, category: '器官' },
        ],
        rules: [],
        color: '#06b6d4',
        z_index: 3,
      },
    ]);
    apiMock.updateTemplate.mockResolvedValueOnce({
      id: 't1',
      name: '模板',
      description: 'desc',
      classes: [
        { id: 'c1', name: '胆囊', color: '#ff0000', zIndex: 20, maskId: 1, category: '器官' },
        { id: 'c2', name: '肝脏', color: '#00ff00', zIndex: 10, maskId: 2, category: '器官' },
      ],
      rules: [],
      color: '#06b6d4',
      z_index: 3,
    });

    render(<TemplateRegistry />);
    const gallbladderRow = (await screen.findByText('胆囊')).closest('[draggable="true"]') as HTMLElement;
    const liverRow = screen.getByText('肝脏').closest('[draggable="true"]') as HTMLElement;
    const dataTransfer = makeDataTransfer();

    fireEvent.dragStart(gallbladderRow, { dataTransfer });
    fireEvent.dragOver(liverRow, { dataTransfer });
    fireEvent.drop(liverRow, { dataTransfer });

    await waitFor(() => expect(apiMock.updateTemplate).toHaveBeenCalledWith('t1', expect.objectContaining({
      classes: [
        expect.objectContaining({ id: 'c1', zIndex: 20, maskId: 1 }),
        expect.objectContaining({ id: 'c2', zIndex: 10, maskId: 2 }),
        expect.objectContaining({ name: '待分类', zIndex: 0, maskId: 0 }),
      ],
      color: '#06b6d4',
      z_index: 3,
    })));
    await waitFor(() => expect(useStore.getState().templates[0].classes[0]).toEqual(
      expect.objectContaining({ id: 'c1', zIndex: 20 }),
    ));
  });

  it('deletes an existing template after confirmation', async () => {
    apiMock.getTemplates.mockResolvedValueOnce([
      {
        id: 't1',
        name: '待删除模板',
        description: 'desc',
        classes: [],
        rules: [],
      },
    ]);
    apiMock.deleteTemplate.mockResolvedValueOnce(undefined);
    const { container } = render(<TemplateRegistry />);

    await screen.findAllByText('待删除模板');
    fireEvent.click(container.querySelector('button[title="删除模板"]') as HTMLElement);
    fireEvent.click(screen.getByRole('button', { name: '确认删除' }));

    await waitFor(() => expect(apiMock.deleteTemplate).toHaveBeenCalledWith('t1'));
    expect(useStore.getState().templates).toEqual([]);
  });
});