import * as fs from 'fs';
import * as os from 'os';
import * as path from 'path';
import { afterEach, beforeEach, describe, expect, it } from 'bun:test';
import {
  ensureProviderSettings,
  getEffectiveEnvVars,
} from '../../../src/cliproxy/config/env-builder';

interface EnvSettings {
  ANTHROPIC_BASE_URL: string;
  ANTHROPIC_AUTH_TOKEN: string;
  ANTHROPIC_MODEL: string;
  ANTHROPIC_DEFAULT_OPUS_MODEL: string;
  ANTHROPIC_DEFAULT_SONNET_MODEL: string;
  ANTHROPIC_DEFAULT_HAIKU_MODEL: string;
}

function writeSettings(
  settingsPath: string,
  env: EnvSettings,
  extras?: Record<string, unknown>
): void {
  fs.writeFileSync(settingsPath, JSON.stringify({ env, ...(extras || {}) }, null, 2));
}

describe('getEffectiveEnvVars local provider URL normalization', () => {
  let tempHome: string;
  let settingsPath: string;
  let originalCcsHome: string | undefined;

  beforeEach(() => {
    originalCcsHome = process.env.CCS_HOME;
    tempHome = fs.mkdtempSync(path.join(os.tmpdir(), 'ccs-env-url-'));
    settingsPath = path.join(tempHome, 'codex.settings.json');
  });

  afterEach(() => {
    process.env.CCS_HOME = originalCcsHome;
    fs.rmSync(tempHome, { recursive: true, force: true });
  });

  it('rewrites local root URL to provider endpoint', () => {
    writeSettings(settingsPath, {
      ANTHROPIC_BASE_URL: 'http://127.0.0.1:8317',
      ANTHROPIC_AUTH_TOKEN: 'ccs-internal-managed',
      ANTHROPIC_MODEL: 'gpt-5.3-codex-xhigh',
      ANTHROPIC_DEFAULT_OPUS_MODEL: 'gpt-5.3-codex-xhigh',
      ANTHROPIC_DEFAULT_SONNET_MODEL: 'gpt-5.3-codex-high',
      ANTHROPIC_DEFAULT_HAIKU_MODEL: 'gpt-5-mini-medium',
    });

    const env = getEffectiveEnvVars('codex', 8317, settingsPath);
    expect(env.ANTHROPIC_BASE_URL).toBe('http://127.0.0.1:8317/api/provider/codex');
    expect(env.ANTHROPIC_MODEL).toBe('gpt-5.3-codex');
    expect(env.ANTHROPIC_DEFAULT_OPUS_MODEL).toBe('gpt-5.3-codex');
    expect(env.ANTHROPIC_DEFAULT_SONNET_MODEL).toBe('gpt-5.3-codex');
    expect(env.ANTHROPIC_DEFAULT_HAIKU_MODEL).toBe('gpt-5-mini');

    const persisted = JSON.parse(fs.readFileSync(settingsPath, 'utf-8')) as {
      env: Record<string, string>;
    };
    expect(persisted.env.ANTHROPIC_MODEL).toBe('gpt-5.3-codex');
    expect(persisted.env.ANTHROPIC_DEFAULT_OPUS_MODEL).toBe('gpt-5.3-codex');
    expect(persisted.env.ANTHROPIC_DEFAULT_SONNET_MODEL).toBe('gpt-5.3-codex');
    expect(persisted.env.ANTHROPIC_DEFAULT_HAIKU_MODEL).toBe('gpt-5-mini');
  });

  it('rewrites wrong local provider path to the requested provider', () => {
    writeSettings(settingsPath, {
      ANTHROPIC_BASE_URL: 'http://localhost:8317/api/provider/my-codex-variant?debug=1',
      ANTHROPIC_AUTH_TOKEN: 'ccs-internal-managed',
      ANTHROPIC_MODEL: 'gpt-5.3-codex-xhigh',
      ANTHROPIC_DEFAULT_OPUS_MODEL: 'gpt-5.3-codex-xhigh',
      ANTHROPIC_DEFAULT_SONNET_MODEL: 'gpt-5.3-codex-high',
      ANTHROPIC_DEFAULT_HAIKU_MODEL: 'gpt-5-mini-medium',
    });

    const env = getEffectiveEnvVars('codex', 8317, settingsPath);
    expect(env.ANTHROPIC_BASE_URL).toBe('http://localhost:8317/api/provider/codex');
  });

  it('does not rewrite localhost URLs targeting non-cliproxy ports', () => {
    writeSettings(settingsPath, {
      ANTHROPIC_BASE_URL: 'http://127.0.0.1:11434',
      ANTHROPIC_AUTH_TOKEN: 'ccs-internal-managed',
      ANTHROPIC_MODEL: 'gpt-5.3-codex-xhigh',
      ANTHROPIC_DEFAULT_OPUS_MODEL: 'gpt-5.3-codex-xhigh',
      ANTHROPIC_DEFAULT_SONNET_MODEL: 'gpt-5.3-codex-high',
      ANTHROPIC_DEFAULT_HAIKU_MODEL: 'gpt-5-mini-medium',
    });

    const env = getEffectiveEnvVars('codex', 8317, settingsPath);
    expect(env.ANTHROPIC_BASE_URL).toBe('http://127.0.0.1:11434');
  });

  it('normalizes dotted Claude major.minor IDs for agy provider settings', () => {
    writeSettings(settingsPath, {
      ANTHROPIC_BASE_URL: 'http://127.0.0.1:8317/api/provider/agy',
      ANTHROPIC_AUTH_TOKEN: 'ccs-internal-managed',
      ANTHROPIC_MODEL: 'claude-sonnet-4.6-thinking',
      ANTHROPIC_DEFAULT_OPUS_MODEL: 'claude-opus-4.6-thinking',
      ANTHROPIC_DEFAULT_SONNET_MODEL: 'claude-sonnet-4.6-thinking',
      ANTHROPIC_DEFAULT_HAIKU_MODEL: 'claude-haiku-4.5',
    });

    const env = getEffectiveEnvVars('agy', 8317, settingsPath);
    expect(env.ANTHROPIC_MODEL).toBe('claude-sonnet-4-6-thinking');
    expect(env.ANTHROPIC_DEFAULT_OPUS_MODEL).toBe('claude-opus-4-6-thinking');
    expect(env.ANTHROPIC_DEFAULT_SONNET_MODEL).toBe('claude-sonnet-4-6-thinking');
    expect(env.ANTHROPIC_DEFAULT_HAIKU_MODEL).toBe('claude-haiku-4-5');
  });

  it('migrates codex preset model mappings to canonical IDs', () => {
    writeSettings(
      settingsPath,
      {
        ANTHROPIC_BASE_URL: 'http://127.0.0.1:8317/api/provider/codex',
        ANTHROPIC_AUTH_TOKEN: 'ccs-internal-managed',
        ANTHROPIC_MODEL: 'gpt-5.3-codex-xhigh',
        ANTHROPIC_DEFAULT_OPUS_MODEL: 'gpt-5.3-codex-xhigh',
        ANTHROPIC_DEFAULT_SONNET_MODEL: 'gpt-5.3-codex-high',
        ANTHROPIC_DEFAULT_HAIKU_MODEL: 'gpt-5-mini-medium',
      },
      {
        presets: [
          {
            name: 'legacy-codex',
            default: 'gpt-5.3-codex-xhigh',
            opus: 'gpt-5.3-codex-xhigh',
            sonnet: 'gpt-5.3-codex-high',
            haiku: 'gpt-5-mini-medium',
          },
        ],
      }
    );

    getEffectiveEnvVars('codex', 8317, settingsPath);

    const persisted = JSON.parse(fs.readFileSync(settingsPath, 'utf-8')) as {
      presets: Array<Record<string, string>>;
    };
    expect(persisted.presets[0]?.default).toBe('gpt-5.3-codex');
    expect(persisted.presets[0]?.opus).toBe('gpt-5.3-codex');
    expect(persisted.presets[0]?.sonnet).toBe('gpt-5.3-codex');
    expect(persisted.presets[0]?.haiku).toBe('gpt-5-mini');
  });

  it('repairs existing provider settings files that are missing env keys', () => {
    process.env.CCS_HOME = tempHome;
    const agySettingsPath = path.join(tempHome, '.ccs', 'agy.settings.json');
    fs.mkdirSync(path.dirname(agySettingsPath), { recursive: true });
    fs.writeFileSync(
      agySettingsPath,
      JSON.stringify(
        {
          hooks: {
            PreToolUse: [{ matcher: 'WebSearch', hooks: [] }],
          },
        },
        null,
        2
      )
    );

    ensureProviderSettings('agy');

    const repaired = JSON.parse(fs.readFileSync(agySettingsPath, 'utf-8')) as {
      env?: Record<string, string>;
      hooks?: Record<string, unknown>;
    };
    expect(repaired.hooks?.PreToolUse).toBeDefined();
    expect(repaired.env?.ANTHROPIC_BASE_URL).toBe('http://127.0.0.1:8317/api/provider/agy');
    expect(repaired.env?.ANTHROPIC_MODEL).toBeDefined();
    expect(repaired.env?.ANTHROPIC_DEFAULT_OPUS_MODEL).toBeDefined();
    expect(repaired.env?.ANTHROPIC_DEFAULT_SONNET_MODEL).toBeDefined();
    expect(repaired.env?.ANTHROPIC_DEFAULT_HAIKU_MODEL).toBeDefined();
  });

  it('recovers malformed provider settings files by writing defaults and backup copy', () => {
    process.env.CCS_HOME = tempHome;
    const agySettingsPath = path.join(tempHome, '.ccs', 'agy.settings.json');
    fs.mkdirSync(path.dirname(agySettingsPath), { recursive: true });
    fs.writeFileSync(agySettingsPath, '{"env": {"ANTHROPIC_MODEL": "claude-sonnet-4-6-thinking",}');

    ensureProviderSettings('agy');

    const repaired = JSON.parse(fs.readFileSync(agySettingsPath, 'utf-8')) as {
      env?: Record<string, string>;
    };
    expect(repaired.env?.ANTHROPIC_MODEL).toBeDefined();

    const backups = fs
      .readdirSync(path.dirname(agySettingsPath))
      .filter((file) => file.startsWith('agy.settings.json.corrupt-'));
    expect(backups.length).toBe(1);
  });
});