const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');

function loadRuntimeStateApi() {
  const source = fs.readFileSync('background/runtime-state.js', 'utf8');
  const globalScope = {};
  return new Function('self', `${source}; return self.MultiPageBackgroundRuntimeState;`)(globalScope);
}

test('background imports runtime-state module and wires state view helpers', () => {
  const source = fs.readFileSync('background.js', 'utf8');
  assert.match(source, /background\/runtime-state\.js/);
  assert.match(source, /createRuntimeStateHelpers/);
  assert.match(source, /buildStateViewWithRuntimeState/);
  assert.match(source, /buildStatePatchWithRuntimeState/);
  assert.match(source, /runtimeState:/);
});

test('runtime-state module exposes a factory', () => {
  const api = loadRuntimeStateApi();
  assert.equal(typeof api?.createRuntimeStateHelpers, 'function');
});

test('runtime-state view preserves canonical flow metadata from node state', () => {
  const api = loadRuntimeStateApi();
  const helpers = api.createRuntimeStateHelpers({
    DEFAULT_ACTIVE_FLOW_ID: 'openai',
    defaultNodeStatuses: {
      'open-chatgpt': 'pending',
      'submit-signup-email': 'pending',
      'oauth-login': 'pending',
    },
  });

  const view = helpers.buildStateView({
    currentNodeId: 'submit-signup-email',
    nodeStatuses: {
      'open-chatgpt': 'completed',
      'submit-signup-email': 'running',
    },
    oauthUrl: 'https://auth.example.com/start',
    plusCheckoutTabId: 88,
    currentPhoneActivation: {
      activationId: 'active-1',
      phoneNumber: '+447700900123',
    },
    tabRegistry: {
      'signup-page': { tabId: 12 },
    },
    sourceLastUrls: {
      'signup-page': 'https://auth.example.com/start',
    },
    flowStartTime: 12345,
  });

  assert.equal(view.activeFlowId, 'openai');
  assert.equal(view.currentNodeId, 'submit-signup-email');
  assert.equal(Object.prototype.hasOwnProperty.call(view, 'legacyStepCompat'), false);
  assert.equal(Object.prototype.hasOwnProperty.call(view, 'currentStep'), false);
  assert.equal(Object.prototype.hasOwnProperty.call(view, 'stepStatuses'), false);
  assert.deepStrictEqual(view.nodeStatuses, {
    'open-chatgpt': 'completed',
    'submit-signup-email': 'running',
    'oauth-login': 'pending',
  });
  assert.equal(view.runtimeState.flowState.openai.auth.oauthUrl, 'https://auth.example.com/start');
  assert.equal(view.runtimeState.flowState.openai.plus.plusCheckoutTabId, 88);
  assert.deepStrictEqual(view.runtimeState.flowState.openai.phoneVerification.currentPhoneActivation, {
    activationId: 'active-1',
    phoneNumber: '+447700900123',
  });
  assert.deepStrictEqual(view.sharedState, {
    tabRegistry: {
      'signup-page': { tabId: 12 },
    },
    sourceLastUrls: {
      'signup-page': 'https://auth.example.com/start',
    },
    flowStartTime: 12345,
  });
});

test('runtime-state patch accepts nested flow and node updates without legacy step state', () => {
  const api = loadRuntimeStateApi();
  const helpers = api.createRuntimeStateHelpers({
    DEFAULT_ACTIVE_FLOW_ID: 'openai',
    defaultNodeStatuses: {
      'open-chatgpt': 'pending',
      'submit-signup-email': 'pending',
      'oauth-login': 'pending',
    },
  });

  const patch = helpers.buildSessionStatePatch({
    currentNodeId: 'open-chatgpt',
    nodeStatuses: {
      'open-chatgpt': 'running',
      'submit-signup-email': 'pending',
      'oauth-login': 'pending',
    },
    oauthUrl: 'https://old.example.com/start',
  }, {
    runtimeState: {
      activeRunId: 'run-001',
      currentNodeId: 'oauth-login',
      nodeStatuses: {
        'open-chatgpt': 'completed',
        'oauth-login': 'running',
      },
      flowState: {
        openai: {
          auth: {
            oauthUrl: 'https://new.example.com/start',
          },
          plus: {
            plusCheckoutTabId: 99,
          },
        },
      },
    },
  });

  assert.equal(patch.activeFlowId, 'openai');
  assert.equal(patch.activeRunId, 'run-001');
  assert.equal(patch.currentNodeId, 'oauth-login');
  assert.equal(Object.prototype.hasOwnProperty.call(patch, 'oauthUrl'), false);
  assert.equal(Object.prototype.hasOwnProperty.call(patch, 'plusCheckoutTabId'), false);
  assert.equal(Object.prototype.hasOwnProperty.call(patch, 'currentStep'), false);
  assert.equal(Object.prototype.hasOwnProperty.call(patch, 'stepStatuses'), false);
  assert.deepStrictEqual(patch.nodeStatuses, {
    'open-chatgpt': 'completed',
    'submit-signup-email': 'pending',
    'oauth-login': 'running',
  });
  assert.equal(patch.runtimeState.flowState.openai.auth.oauthUrl, 'https://new.example.com/start');
  assert.equal(patch.runtimeState.flowState.openai.plus.plusCheckoutTabId, 99);

  const view = helpers.buildStateView(patch);
  assert.equal(view.oauthUrl, 'https://new.example.com/start');
  assert.equal(view.plusCheckoutTabId, 99);
});

test('runtime-state patch prefers explicit activeFlowId over stale legacy flowId', () => {
  const api = loadRuntimeStateApi();
  const helpers = api.createRuntimeStateHelpers({
    DEFAULT_ACTIVE_FLOW_ID: 'openai',
    defaultNodeStatuses: {
      'open-chatgpt': 'pending',
      'kiro-open-register-page': 'pending',
    },
  });

  const patch = helpers.buildSessionStatePatch({
    flowId: 'openai',
    activeFlowId: 'openai',
    nodeStatuses: {
      'open-chatgpt': 'completed',
    },
  }, {
    activeFlowId: 'kiro',
    nodeStatuses: {
      'kiro-open-register-page': 'running',
    },
  });

  assert.equal(patch.activeFlowId, 'kiro');
  assert.equal(patch.flowId, 'kiro');
  assert.deepStrictEqual(patch.nodeStatuses, {
    'open-chatgpt': 'pending',
    'kiro-open-register-page': 'running',
  });
});