import {
  afterEach,
  AsyncTestCompleter,
  beforeEach,
  ddescribe,
  describe,
  expect,
  iit,
  inject,
  it,
  xit,
} from 'angular2/test_lib';

import { ListWrapper } from 'angular2/src/facade/collection';
import { PromiseWrapper } from 'angular2/src/facade/async';
import { Json, isBlank, isPresent } from 'angular2/src/facade/lang';

import {
  WebDriverExtension, IOsDriverExtension,
  WebDriverAdapter, Injector, bind
} from 'benchpress/common';

import { TraceEventFactory } from '../trace_event_factory';

export function main() {
  describe('ios driver extension', () => {
    var log;
    var extension;

    var normEvents = new TraceEventFactory('timeline', 'pid0');

    function createExtension(perfRecords = null) {
      if (isBlank(perfRecords)) {
        perfRecords = [];
      }
      log = [];
      extension = new Injector([
        IOsDriverExtension.BINDINGS,
        bind(WebDriverAdapter).toValue(new MockDriverAdapter(log, perfRecords))
      ]).get(IOsDriverExtension);
      return extension;
    }

    it('should force gc via window.gc()', inject([AsyncTestCompleter], (async) => {
      createExtension().gc().then( (_) => {
        expect(log).toEqual([['executeScript', 'window.gc()']]);
        async.done();
      });
    }));

    it('should mark the timeline via console.time()', inject([AsyncTestCompleter], (async) => {
      createExtension().timeBegin('someName').then( (_) => {
        expect(log).toEqual([['executeScript', `console.time('someName');`]]);
        async.done();
      });
    }));

    it('should mark the timeline via console.timeEnd()', inject([AsyncTestCompleter], (async) => {
      createExtension().timeEnd('someName').then( (_) => {
        expect(log).toEqual([['executeScript', `console.timeEnd('someName');`]]);
        async.done();
      });
    }));

    it('should mark the timeline via console.time() and console.timeEnd()', inject([AsyncTestCompleter], (async) => {
      createExtension().timeEnd('name1', 'name2').then( (_) => {
        expect(log).toEqual([['executeScript', `console.timeEnd('name1');console.time('name2');`]]);
        async.done();
      });
    }));

    describe('readPerfLog', () => {

      it('should execute a dummy script before reading them', inject([AsyncTestCompleter], (async) => {
        // TODO(tbosch): This seems to be a bug in ChromeDriver:
        // Sometimes it does not report the newest events of the performance log
        // to the WebDriver client unless a script is executed...
        createExtension([]).readPerfLog().then( (_) => {
          expect(log).toEqual([ [ 'executeScript', '1+1' ], [ 'logs', 'performance' ] ]);
          async.done();
        });
      }));

      it('should report FunctionCall records as "script"', inject([AsyncTestCompleter], (async) => {
        createExtension([
          durationRecord('FunctionCall', 1, 5)
        ]).readPerfLog().then( (events) => {
          expect(events).toEqual([
            normEvents.start('script', 1),
            normEvents.end('script', 5)
          ]);
          async.done();
        });
      }));

      it('should ignore FunctionCalls from webdriver', inject([AsyncTestCompleter], (async) => {
        createExtension([
          internalScriptRecord(1, 5)
        ]).readPerfLog().then( (events) => {
          expect(events).toEqual([]);
          async.done();
        });
      }));

      it('should report begin time', inject([AsyncTestCompleter], (async) => {
        createExtension([
          timeBeginRecord('someName', 12)
        ]).readPerfLog().then( (events) => {
          expect(events).toEqual([
            normEvents.markStart('someName', 12)
          ]);
          async.done();
        });
      }));

      it('should report end timestamps', inject([AsyncTestCompleter], (async) => {
        createExtension([
          timeEndRecord('someName', 12)
        ]).readPerfLog().then( (events) => {
          expect(events).toEqual([
            normEvents.markEnd('someName', 12)
          ]);
          async.done();
        });
      }));

      it('should report gc', inject([AsyncTestCompleter], (async) => {
        createExtension([
          gcRecord(1, 3, 21)
        ]).readPerfLog().then( (events) => {
          expect(events).toEqual([
            normEvents.start('gc', 1, {'usedHeapSize': 0}),
            normEvents.end('gc', 3, {'usedHeapSize': -21}),
          ]);
          async.done();
        });
      }));

      ['RecalculateStyles', 'Layout', 'UpdateLayerTree', 'Paint', 'Rasterize', 'CompositeLayers'].forEach( (recordType) => {
        it(`should report ${recordType}`, inject([AsyncTestCompleter], (async) => {
          createExtension([
            durationRecord(recordType, 0, 1)
          ]).readPerfLog().then( (events) => {
            expect(events).toEqual([
              normEvents.start('render', 0),
              normEvents.end('render', 1),
            ]);
            async.done();
          });
        }));
      });


      it('should walk children', inject([AsyncTestCompleter], (async) => {
        createExtension([
          durationRecord('FunctionCall', 1, 5, [
            timeBeginRecord('someName', 2)
          ])
        ]).readPerfLog().then( (events) => {
          expect(events).toEqual([
            normEvents.start('script', 1),
            normEvents.markStart('someName', 2),
            normEvents.end('script', 5)
          ]);
          async.done();
        });
      }));

      it('should match safari browsers', () => {
        expect(createExtension().supports({
          'browserName': 'safari'
        })).toBe(true);

        expect(createExtension().supports({
          'browserName': 'Safari'
        })).toBe(true);
      });

    });

  });
}

function timeBeginRecord(name, time) {
  return {
    'type': 'Time',
    'startTime': time,
    'data': {
      'message': name
    }
  };
}

function timeEndRecord(name, time) {
  return {
    'type': 'TimeEnd',
    'startTime': time,
    'data': {
      'message': name
    }
  };
}

function durationRecord(type, startTime, endTime, children = null) {
  if (isBlank(children)) {
    children = [];
  }
  return {
    'type': type,
    'startTime': startTime,
    'endTime': endTime,
    'children': children
  };
}

function internalScriptRecord(startTime, endTime) {
  return {
    'type': 'FunctionCall',
    'startTime': startTime,
    'endTime': endTime,
    'data': {
      'scriptName': 'InjectedScript'
    }
  };
}

function gcRecord(startTime, endTime, gcAmount) {
  return {
    'type': 'GCEvent',
    'startTime': startTime,
    'endTime': endTime,
    'data': {
      'usedHeapSizeDelta': gcAmount
    }
  };
}

class MockDriverAdapter extends WebDriverAdapter {
  _log:List;
  _perfRecords:List;
  constructor(log, perfRecords) {
    super();
    this._log = log;
    this._perfRecords = perfRecords;
  }

  executeScript(script) {
    ListWrapper.push(this._log, ['executeScript', script]);
    return PromiseWrapper.resolve(null);
  }

  logs(type) {
    ListWrapper.push(this._log, ['logs', type]);
    if (type === 'performance') {
      return PromiseWrapper.resolve(this._perfRecords.map(function(record) {
        return {
          'message': Json.stringify({
            'message': {
              'method': 'Timeline.eventRecorded',
              'params': {
                'record': record
              }
            }
          })
        };
      }));
    } else {
      return null;
    }
  }

}