import { describe, it, expect, vi } from 'vitest';
import { createGetCommand } from '../../src/commands/get.js';
import type { GetCommandDeps } from '../../src/commands/get.js';

function makeDeps(items: unknown[] = []): GetCommandDeps & { output: string[] } {
  const output: string[] = [];
  return {
    output,
    fetchResource: vi.fn(async () => items),
    log: (...args: string[]) => output.push(args.join(' ')),
  };
}

describe('get command', () => {
  it('lists servers in table format', async () => {
    const deps = makeDeps([
      { id: 'srv-1', name: 'slack', transport: 'STDIO', packageName: '@slack/mcp', dockerImage: null },
      { id: 'srv-2', name: 'github', transport: 'SSE', packageName: null, dockerImage: 'ghcr.io/github-mcp' },
    ]);
    const cmd = createGetCommand(deps);
    await cmd.parseAsync(['node', 'test', 'servers']);

    expect(deps.fetchResource).toHaveBeenCalledWith('servers', undefined);
    expect(deps.output[0]).toContain('NAME');
    expect(deps.output[0]).toContain('TRANSPORT');
    expect(deps.output.join('\n')).toContain('slack');
    expect(deps.output.join('\n')).toContain('github');
  });

  it('resolves resource aliases', async () => {
    const deps = makeDeps([]);
    const cmd = createGetCommand(deps);
    await cmd.parseAsync(['node', 'test', 'srv']);
    expect(deps.fetchResource).toHaveBeenCalledWith('servers', undefined);
  });

  it('passes ID when provided', async () => {
    const deps = makeDeps([{ id: 'srv-1', name: 'slack' }]);
    const cmd = createGetCommand(deps);
    await cmd.parseAsync(['node', 'test', 'servers', 'srv-1']);
    expect(deps.fetchResource).toHaveBeenCalledWith('servers', 'srv-1');
  });

  it('outputs apply-compatible JSON format', async () => {
    const deps = makeDeps([{ id: 'srv-1', name: 'slack', createdAt: '2025-01-01', updatedAt: '2025-01-01', version: 1 }]);
    const cmd = createGetCommand(deps);
    await cmd.parseAsync(['node', 'test', 'servers', '-o', 'json']);

    const parsed = JSON.parse(deps.output[0] ?? '');
    // Wrapped in resource key, internal fields stripped
    expect(parsed).toHaveProperty('servers');
    expect(parsed.servers[0].name).toBe('slack');
    expect(parsed.servers[0]).not.toHaveProperty('id');
    expect(parsed.servers[0]).not.toHaveProperty('createdAt');
    expect(parsed.servers[0]).not.toHaveProperty('updatedAt');
    expect(parsed.servers[0]).not.toHaveProperty('version');
  });

  it('outputs apply-compatible YAML format', async () => {
    const deps = makeDeps([{ id: 'srv-1', name: 'slack', createdAt: '2025-01-01' }]);
    const cmd = createGetCommand(deps);
    await cmd.parseAsync(['node', 'test', 'servers', '-o', 'yaml']);
    const text = deps.output[0];
    expect(text).toContain('servers:');
    expect(text).toContain('name: slack');
    expect(text).not.toContain('id:');
    expect(text).not.toContain('createdAt:');
  });

  it('lists instances with correct columns', async () => {
    const deps = makeDeps([
      { id: 'inst-1', serverId: 'srv-1', server: { name: 'my-grafana' }, status: 'RUNNING', containerId: 'abc123def456', port: 3000 },
    ]);
    const cmd = createGetCommand(deps);
    await cmd.parseAsync(['node', 'test', 'instances']);
    expect(deps.output[0]).toContain('NAME');
    expect(deps.output[0]).toContain('STATUS');
    expect(deps.output.join('\n')).toContain('my-grafana');
    expect(deps.output.join('\n')).toContain('RUNNING');
  });

  it('shows no results message for empty list', async () => {
    const deps = makeDeps([]);
    const cmd = createGetCommand(deps);
    await cmd.parseAsync(['node', 'test', 'servers']);
    expect(deps.output[0]).toContain('No servers found');
  });
});