import { test } from 'node:test';
import assert from 'node:assert/strict';
import {
  assertLocalConnectionTarget,
  assertLocalStartupContext,
  resolveLocalStartup,
  type LocalStartupContext,
} from '../../YouleNexus/assets/framework/config/local-startup.ts';
import { PROFILES } from '../../YouleNexus/assets/framework/config/profiles.ts';
import type { ResolveRuntimeConfigOptions, RuntimeConfig } from '../../YouleNexus/assets/framework/config/runtime-config.ts';
import type { ConfigFetcher } from '../../YouleNexus/assets/framework/config/remote-config.ts';
import { BUILD_IDENTITY } from '../../YouleNexus/assets/framework/config/sources/defaults.ts';

function options(search = '?profile=local'): ResolveRuntimeConfigOptions & {
  fetcher: ConfigFetcher & { calls: number };
} {
  const fetcher = {
    calls: 0,
    async fetch(): Promise<never> {
      this.calls += 1;
      throw new Error('forbidden fetch');
    },
  };
  return { mode: 'debug', hostKind: 'h5', win: {}, search, fetcher };
}

test('local debug resolves the authoritative direct config without fetching', async () => {
  const input = options();
  const context = await resolveLocalStartup(input);

  assert.equal(context.hostKind, 'h5');
  assert.equal(context.profile, 'local');
  assert.equal(context.config.identity.gameid, BUILD_IDENTITY.gameid);
  assert.deepEqual(context.config.servers, PROFILES.local!.servers);
  assert.equal(input.fetcher.calls, 0);
  assert.equal(Object.isFrozen(context), true);
});

test('rejects non-local startup modes and hosts before fetching', async () => {
  const cases: Array<[Partial<ResolveRuntimeConfigOptions>, RegExp]> = [
    [{ mode: 'release' }, /mode.*debug/i],
    [{ hostKind: 'native-settings' }, /hostKind.*h5/i],
    [{ hostKind: 'uAgent_3' }, /hostKind.*h5/i],
  ];
  for (const [override, expected] of cases) {
    const base = options();
    const input = { ...base, ...override };
    await assert.rejects(resolveLocalStartup(input), expected);
    assert.equal(base.fetcher.calls, 0);
  }
});

test('requires exactly one local profile and only an optional single debug mode', async () => {
  const cases: Array<[string, RegExp]> = [
    ['', /profile/i],
    ['?profile=prod', /profile/i],
    ['?profile=staging', /profile/i],
    ['?profile=local&profile=local', /profile/i],
    ['?profile=local&mode=release', /mode.*debug/i],
    ['?profile=local&mode=debug&mode=debug', /mode/i],
  ];
  for (const [search, expected] of cases) {
    const input = options(search);
    await assert.rejects(resolveLocalStartup(input), expected);
    assert.equal(input.fetcher.calls, 0);
  }
  await resolveLocalStartup(options('?profile=local&mode=debug'));
});

test('rejects gameconfig and ambiguous identity controls before fetching', async () => {
  const cases: Array<[string, RegExp]> = [
    ['?profile=local&gameconfig=remote-host', /gameconfig/i],
    ['?profile=local&agentid=A&agentid=B', /agentid/i],
    ['?profile=local&version=1&version=2', /version/i],
    ['?profile=local&gameid=other', /gameid/i],
  ];
  for (const [search, expected] of cases) {
    const input = options(search);
    await assert.rejects(resolveLocalStartup(input), expected);
    assert.equal(input.fetcher.calls, 0);
  }
});

test('permits query identity overrides except gameid and validates numeric version', async () => {
  const context = await resolveLocalStartup(options(
    '?profile=local&agentid=A&channelid=C&marketid=9&version=12',
  ));
  assert.deepEqual(context.config.identity, {
    ...BUILD_IDENTITY,
    agentid: 'A',
    channelid: 'C',
    marketid: '9',
    version: 12,
  });

  const invalid = options('?profile=local&version=not-a-number');
  await assert.rejects(resolveLocalStartup(invalid), /identity.*version.*finite/i);
  assert.equal(invalid.fetcher.calls, 0);
});

function validContext(): LocalStartupContext {
  return {
    hostKind: 'h5',
    profile: 'local',
    config: {
      mode: 'debug',
      isDebugger: true,
      identity: BUILD_IDENTITY,
      servers: PROFILES.local!.servers!,
      source: 'direct',
      gameserver: null,
      rawConfig: null,
    },
  };
}

test('context validator rejects forged config fields and malformed identity', () => {
  const base = validContext();
  const configCases: Array<[keyof RuntimeConfig, unknown]> = [
    ['mode', 'release'],
    ['isDebugger', false],
    ['source', 'remote'],
    ['gameserver', 'https://example.com/config.txt'],
    ['rawConfig', {}],
    ['servers', ['ws://127.0.0.1:9999']],
    ['servers', ['https://127.0.0.1:3088']],
    ['servers', ['ws://user:pass@127.0.0.1:3088']],
  ];
  for (const [field, value] of configCases) {
    assert.throws(
      () => assertLocalStartupContext({ ...base, config: { ...base.config, [field]: value } } as LocalStartupContext),
      new RegExp(field, 'i'),
    );
  }
  assert.throws(
    () => assertLocalStartupContext({
      ...base,
      config: { ...base.config, identity: { ...BUILD_IDENTITY, version: Number.NaN } },
    }),
    /identity.*version.*finite/i,
  );
});

test('context validator names identity when a forged context omits the identity object', () => {
  const base = validContext();
  for (const identity of [null, undefined]) {
    assert.throws(
      () => assertLocalStartupContext({
        ...base,
        config: { ...base.config, identity },
      } as unknown as LocalStartupContext),
      (error: unknown) => {
        assert.ok(error instanceof Error);
        assert.match(error.message, /identity/i);
        assert.ok((error as Error & { cause?: unknown }).cause instanceof Error);
        return true;
      },
    );
  }
});

test('connection target must be a valid URL from the authoritative local profile', () => {
  const context = validContext();
  assert.doesNotThrow(() => assertLocalConnectionTarget(context, 'ws://127.0.0.1:3088'));
  for (const [url, expected] of [
    ['ws://127.0.0.1:9999', /url|target|servers/i],
    ['ws://example.com:3088', /url|target|servers|hostname/i],
    ['not-a-url', /url/i],
  ] as const) {
    assert.throws(() => assertLocalConnectionTarget(context, url), expected);
  }
});