// 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 {Trace} from '../../public/trace';
import {PerfettoPlugin} from '../../public/plugin';
import {addDebugCounterTrack} from '../../public/lib/tracks/debug_tracks';

export default class implements PerfettoPlugin {
  static readonly id = 'com.google.PixelMemory';

  async onTraceLoad(ctx: Trace): Promise<void> {
    ctx.commands.registerCommand({
      id: 'dev.perfetto.PixelMemory#ShowTotalMemory',
      name: 'Add tracks: show a process total memory',
      callback: async (pid) => {
        if (pid === undefined) {
          pid = prompt('Enter a process pid', '');
          if (pid === null) return;
        }
        const RSS_ALL = `
          INCLUDE PERFETTO MODULE android.gpu.memory;
          INCLUDE PERFETTO MODULE linux.memory.process;

          DROP TABLE IF EXISTS process_mem_rss_anon_file_shmem_swap_gpu;

          CREATE VIRTUAL TABLE process_mem_rss_anon_file_shmem_swap_gpu
          USING
            SPAN_OUTER_JOIN(
              android_gpu_memory_per_process PARTITIONED upid,
              memory_rss_and_swap_per_process PARTITIONED upid
            );
        `;
        await ctx.engine.query(RSS_ALL);
        await addDebugCounterTrack({
          trace: ctx,
          data: {
            sqlSource: `
                SELECT
                  ts,
                  COALESCE(rss_and_swap, 0) + COALESCE(gpu_memory, 0) AS value
                FROM process_mem_rss_anon_file_shmem_swap_gpu
                WHERE pid = ${pid}
            `,
            columns: ['ts', 'value'],
          },
          title: pid + '_rss_anon_file_swap_shmem_gpu',
        });
      },
    });
  }
}