// Copyright (C) 2024 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 {
  expandProcessName,
  FullTraceMetricData,
  JankType,
  MetricHandler,
} from './metricUtils';
import {Trace} from '../../../public/trace';
import {addDebugSliceTrack} from '../../../public/debug_tracks';

class FullTraceJankMetricHandler implements MetricHandler {
  /**
   * Matches metric key & return parsed data if successful.
   *
   * @param {string} metricKey The metric key to match.
   * @returns {FullTraceMetricData | undefined} Parsed data or undefined if no match.
   */
  public match(metricKey: string): FullTraceMetricData | undefined {
    const matcher =
      /perfetto_ft_(?<process>.*)-missed_(?<jankType>frames|sf_frames|app_frames)/;
    const match = matcher.exec(metricKey);
    if (!match?.groups) {
      return undefined;
    }
    const metricData: FullTraceMetricData = {
      process: expandProcessName(match.groups.process),
      jankType: match.groups.jankType as JankType,
    };
    return metricData;
  }

  /**
   * Adds the debug track for full trace jank metrics
   *
   * @param {FullTraceMetricData} metricData Parsed metric data for the full trace jank
   * @param {Trace} ctx PluginContextTrace for trace related properties and methods
   * @returns {void} Adds one track for Jank slice
   */
  public async addMetricTrack(metricData: FullTraceMetricData, ctx: Trace) {
    const INCLUDE_PREQUERY = `
    INCLUDE PERFETTO MODULE android.frames.jank_type;
    INCLUDE PERFETTO MODULE slices.slices;
    `;
    const config = this.fullTraceJankConfig(metricData);
    await ctx.engine.query(INCLUDE_PREQUERY);
    addDebugSliceTrack({trace: ctx, ...config});
  }

  private fullTraceJankConfig(metricData: FullTraceMetricData) {
    let jankTypeFilter;
    let jankTypeDisplayName;
    if (metricData.jankType?.includes('app')) {
      jankTypeFilter = ' android_is_app_jank_type(display_value)';
      jankTypeDisplayName = 'app';
    } else if (metricData.jankType?.includes('sf')) {
      jankTypeFilter = ' android_is_sf_jank_type(display_value)';
      jankTypeDisplayName = 'sf';
    } else {
      jankTypeFilter = " display_value != 'None'";
      jankTypeDisplayName = 'all';
    }
    const processName = metricData.process;

    // TODO: b/324245198 - Refactor when jank_type added to android_frame_stats
    const fullTraceJankQuery = `
      WITH filtered_args AS (
        SELECT DISTINCT arg_set_id
        FROM args
        WHERE key = 'Jank type'
        ${jankTypeFilter ? 'AND ' + jankTypeFilter : ''}
      )
      SELECT
        name,
        ts as ts,
        dur as dur,
        track_id as track_id,
        id as slice_id,
        thread_dur as thread_dur,
        category,
        thread_name,
        tid as tid,
        process_name,
        pid as pid
      FROM _slice_with_thread_and_process_info
      JOIN filtered_args ON filtered_args.arg_set_id = _slice_with_thread_and_process_info.arg_set_id
      WHERE process_name = '${processName}'`;
    const fullTraceJankColumns = [
      'name',
      'ts',
      'dur',
      'track_id',
      'slice_id',
      'thread_dur',
      'category',
      'thread_name',
      'tid',
      'process_name',
      'pid',
    ];

    const trackName = jankTypeDisplayName + ' missed frames in ' + processName;

    return {
      data: {
        sqlSource: fullTraceJankQuery,
        columns: fullTraceJankColumns,
      },
      columns: {ts: 'ts', dur: 'dur', name: 'name'},
      argColumns: fullTraceJankColumns,
      tableName: trackName,
    };
  }
}

export const pinFullTraceJankInstance = new FullTraceJankMetricHandler();