/**
 * DeepSeek Harness (`dsh`) run mode.
 *
 * The interesting assertions here are the ones that differ from every sibling
 * CLI, because dsh is shaped differently in two ways:
 *
 *  1. the agent is a PROFILE, not the binary, so the spawn line carries
 *     `--profile <name>` and a profile name has to be treated as a path segment;
 *  2. the permission switch is an ENV VAR (`DSH_PERMISSION_MODE`), not a flag,
 *     so the thing to pin is that nothing permission-shaped ever reaches the
 *     command line.
 */
import { describe, expect, it, vi, beforeEach, afterEach } from 'vitest';
import { CreateSessionSchema, QuickStartSchema, HookEventSchema } from '../src/web/schemas.js';
import { buildSpawnCommand } from '../src/tmux-manager.js';
import { defaultDockerCommandForMode } from '../src/docker-hosts.js';
import { defaultRemoteCommandForMode } from '../src/remote-hosts.js';
import { isExternalCliMode, isAltScreenStripMode } from '../src/session.js';
import { hooksAvailableForMode } from '../src/web/session-wait-registry.js';
import { _clampExternalCliBypassForOwner } from '../src/web/routes/session-routes.js';
import { DEEPSEEK_STATE_TO_HOOK_EVENT } from '../src/deepseek-status-shim.js';

vi.mock('../src/utils/deepseek-cli-resolver.js', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../src/utils/deepseek-cli-resolver.js')>();
  return { ...actual, resolveDefaultDeepSeekProfile: vi.fn(() => 'dsh-tui') };
});

describe('DeepSeek mode schemas', () => {
  it('accepts DeepSeek session creation config', () => {
    const parsed = CreateSessionSchema.parse({
      workingDir: '/tmp',
      mode: 'deepseek',
      deepSeekConfig: { profile: 'dsh-tui', permissionMode: 'danger-full-access' },
    });

    expect(parsed.mode).toBe('deepseek');
    expect(parsed.deepSeekConfig).toEqual({ profile: 'dsh-tui', permissionMode: 'danger-full-access' });
  });

  it('accepts DeepSeek quick-start config', () => {
    const parsed = QuickStartSchema.parse({
      caseName: 'dsh-case',
      mode: 'deepseek',
      deepSeekConfig: { resumeSessionId: 'sess_01H9', statusReporting: false },
    });

    expect(parsed.mode).toBe('deepseek');
    expect(parsed.deepSeekConfig?.resumeSessionId).toBe('sess_01H9');
    expect(parsed.deepSeekConfig?.statusReporting).toBe(false);
  });

  it('rejects a profile name that is not a single path segment', () => {
    // A profile is BOTH interpolated into a `bash -c "…"` line and joined into a
    // filesystem path under $DSH_HOME/profiles, so separators and traversal have
    // to die at the schema boundary.
    for (const profile of ['../../etc/passwd', 'a/b', './x', '-rf', 'has space', 'semi;colon']) {
      expect(() =>
        CreateSessionSchema.parse({ workingDir: '/tmp', mode: 'deepseek', deepSeekConfig: { profile } })
      ).toThrow();
    }
  });

  it('rejects an unknown permission preset', () => {
    // The three presets are the harness's own; anything else would be exported
    // verbatim as DSH_PERMISSION_MODE and silently fall back to its default.
    expect(() =>
      CreateSessionSchema.parse({
        workingDir: '/tmp',
        mode: 'deepseek',
        deepSeekConfig: { permissionMode: 'yolo' },
      })
    ).toThrow();
  });

  it('rejects unsafe resumeSessionId values', () => {
    expect(() =>
      CreateSessionSchema.parse({
        workingDir: '/tmp',
        mode: 'deepseek',
        deepSeekConfig: { resumeSessionId: '../../etc/passwd' },
      })
    ).toThrow();
  });

  it('allows DSH_* and DEEPSEEK_* env overrides but not a foreign provider key', () => {
    const ok = CreateSessionSchema.parse({
      workingDir: '/tmp',
      mode: 'deepseek',
      envOverrides: { DSH_HOME: '/tmp/dsh', DEEPSEEK_API_KEY: 'sk-test' },
    });
    expect(ok.envOverrides).toEqual({ DSH_HOME: '/tmp/dsh', DEEPSEEK_API_KEY: 'sk-test' });

    // A dsh settings.yaml can name ANY env var as a provider credential
    // (apiKeyEnv), which is pi's 34-provider-key problem in a new shape. The
    // allowlist is global, so admitting them would widen every mode at once.
    expect(() =>
      CreateSessionSchema.parse({
        workingDir: '/tmp',
        mode: 'deepseek',
        envOverrides: { QWEN5090_API_KEY: 'sk-test' },
      })
    ).toThrow();
  });
});

describe('DeepSeek spawn command', () => {
  it('boots the requested profile', () => {
    const cmd = buildSpawnCommand({
      mode: 'deepseek',
      sessionId: 's1',
      deepSeekConfig: { profile: 'dsh-tui' },
    });
    expect(cmd).toBe('dsh --profile dsh-tui');
  });

  it('falls back to the resolved default profile when none was requested', () => {
    const cmd = buildSpawnCommand({ mode: 'deepseek', sessionId: 's1' });
    expect(cmd).toBe('dsh --profile dsh-tui');
  });

  it('never puts anything permission-shaped on the command line', () => {
    // The harness has NO permission flag: the switch is the DSH_PERMISSION_MODE
    // env export, applied via `tmux setenv`. If this ever starts failing, someone
    // has invented a flag that does not exist.
    const cmd = buildSpawnCommand({
      mode: 'deepseek',
      sessionId: 's1',
      deepSeekConfig: { profile: 'dsh-tui', permissionMode: 'danger-full-access' },
    });
    expect(cmd).toBe('dsh --profile dsh-tui');
    expect(cmd).not.toMatch(/danger|approve|permission|yolo|dangerously/i);
  });

  it('prefers an explicit resume id over the most-recent form', () => {
    const cmd = buildSpawnCommand({
      mode: 'deepseek',
      sessionId: 's1',
      deepSeekConfig: { profile: 'p', resumeSession: true, resumeSessionId: 'sess_42' },
    });
    expect(cmd).toBe('dsh --profile p --resume sess_42');
  });

  it('resumes the most recent session when only the flag is set', () => {
    const cmd = buildSpawnCommand({
      mode: 'deepseek',
      sessionId: 's1',
      deepSeekConfig: { profile: 'p', resumeSession: true },
    });
    expect(cmd).toBe('dsh --profile p --resume');
  });

  it('drops an unsafe profile rather than interpolating it', () => {
    // Defense in depth behind the schema: builders must not trust their callers,
    // because this string is interpolated into a `bash -c "…"` argument.
    const cmd = buildSpawnCommand({
      mode: 'deepseek',
      sessionId: 's1',
      deepSeekConfig: { profile: 'evil; rm -rf /' },
    });
    expect(cmd).not.toContain('rm -rf');
    expect(cmd).toBe('dsh --profile dsh-tui');
  });
});

describe('DeepSeek mode wiring', () => {
  it('is an external CLI mode', () => {
    expect(isExternalCliMode('deepseek')).toBe(true);
  });

  it('is NOT an alt-screen strip mode', () => {
    // The strip is for Ink-style repaint TUIs (claude/codex/gemini). A dsh
    // terminal profile is a third-party fullscreen TUI, i.e. the opencode case.
    expect(isAltScreenStripMode('deepseek')).toBe(false);
  });

  it('has default remote and docker commands', () => {
    expect(defaultRemoteCommandForMode('deepseek')).toContain('dsh');
    expect(defaultDockerCommandForMode('deepseek')).toBe('exec dsh');
  });
});

describe('DeepSeek status bridge', () => {
  it('is the only non-claude mode allowed to deliver hook signals', () => {
    // Earned, not granted: the harness terminal front door REPORTS its state to
    // a supervisor, so `stop` and `blocked` for a dsh session are definitive
    // rather than inferred. Every other external CLI must keep failing this.
    expect(hooksAvailableForMode('deepseek')).toBe(true);
    expect(hooksAvailableForMode('claude')).toBe(true);
    for (const mode of ['shell', 'opencode', 'codex', 'gemini', 'antigravity', 'pi', 'grok'] as const) {
      expect(hooksAvailableForMode(mode)).toBe(false);
    }
  });

  it('maps the harness lifecycle states onto real hook events', () => {
    expect(DEEPSEEK_STATE_TO_HOOK_EVENT.idle).toBe('stop');
    expect(DEEPSEEK_STATE_TO_HOOK_EVENT.blocked).toBe('permission_prompt');
    expect(DEEPSEEK_STATE_TO_HOOK_EVENT.working).toBe('agent_working');
    // Every mapped event must be one the hook endpoint actually accepts, or the
    // bridge would post reports the schema silently rejects.
    for (const event of Object.values(DEEPSEEK_STATE_TO_HOOK_EVENT)) {
      expect(() => HookEventSchema.parse({ event, sessionId: 's1' })).not.toThrow();
    }
  });
});

describe('DeepSeek multi-user clamp', () => {
  const ORIGINAL = process.env.CODEMAN_MULTIUSER;
  beforeEach(() => {
    process.env.CODEMAN_MULTIUSER = '1';
  });
  afterEach(() => {
    if (ORIGINAL === undefined) delete process.env.CODEMAN_MULTIUSER;
    else process.env.CODEMAN_MULTIUSER = ORIGINAL;
  });

  it('clamps a sent danger-full-access down to workspace-write, not read-only', () => {
    // The clamp removes PRIVILEGE; it must not also break the session's ability
    // to edit its own workspace, which read-only would.
    return _clampExternalCliBypassForOwner('nobody', undefined, undefined, undefined, undefined, undefined, {
      permissionMode: 'danger-full-access',
    }).then((out) => {
      expect(out.deepSeekConfig?.permissionMode).toBe('workspace-write');
    });
  });

  it('leaves an ABSENT config absent (the only-if-sent branch)', async () => {
    // Omitting DSH_PERMISSION_MODE leaves the harness on its own workspace-write
    // preset, which still asks — so there is nothing to materialize, unlike pi.
    const out = await _clampExternalCliBypassForOwner(
      'nobody',
      undefined,
      undefined,
      undefined,
      undefined,
      undefined,
      undefined
    );
    expect(out.deepSeekConfig).toBeUndefined();
  });
});