// Copyright (C) 2021 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import {ColumnDef, Sorting} from '../../public/aggregation';
import {AreaSelection} from '../../public/selection';
import {Engine} from '../../trace_processor/engine';
import {AreaSelectionAggregator} from '../../public/selection';
import {LONG, STR} from '../../trace_processor/query_result';
import {Dataset} from '../../trace_processor/dataset';

export const ACTUAL_FRAMES_SLICE_TRACK_KIND = 'ActualFramesSliceTrack';

export class FrameSelectionAggregator implements AreaSelectionAggregator {
  readonly id = 'frame_aggregation';
  readonly schema = {
    ts: LONG,
    dur: LONG,
    jank_type: STR,
  } as const;
  readonly trackKind = ACTUAL_FRAMES_SLICE_TRACK_KIND;

  async createAggregateView(
    engine: Engine,
    area: AreaSelection,
    dataset?: Dataset,
  ) {
    if (!dataset) return false;

    await engine.query(`
      create or replace perfetto table ${this.id} as
      select
        jank_type,
        count(1) as occurrences,
        min(dur) as minDur,
        avg(dur) as meanDur,
        max(dur) as maxDur
      from (${dataset.query()})
      where ts + dur > ${area.start}
        AND ts < ${area.end}
      group by jank_type
    `);
    return true;
  }

  getTabName() {
    return 'Frames';
  }

  async getExtra() {}

  getDefaultSorting(): Sorting {
    return {column: 'occurrences', direction: 'DESC'};
  }

  getColumnDefinitions(): ColumnDef[] {
    return [
      {
        title: 'Jank Type',
        kind: 'STRING',
        columnConstructor: Uint16Array,
        columnId: 'jank_type',
      },
      {
        title: 'Min duration',
        kind: 'NUMBER',
        columnConstructor: Uint16Array,
        columnId: 'minDur',
      },
      {
        title: 'Max duration',
        kind: 'NUMBER',
        columnConstructor: Uint16Array,
        columnId: 'maxDur',
      },
      {
        title: 'Mean duration',
        kind: 'NUMBER',
        columnConstructor: Uint16Array,
        columnId: 'meanDur',
      },
      {
        title: 'Occurrences',
        kind: 'NUMBER',
        columnConstructor: Uint16Array,
        columnId: 'occurrences',
        sum: true,
      },
    ];
  }
}