// Copyright (C) 2023 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 m from 'mithril';

import {EngineProxy} from '../../common/engine';
import {Button} from '../../frontend/widgets/button';
import {Select} from '../../frontend/widgets/select';
import {TextInput} from '../../frontend/widgets/text_input';
import {Tree, TreeNode} from '../../frontend/widgets/tree';
import {addDebugTrack, SliceColumns} from './slice_track';

export const ARG_PREFIX = 'arg_';

export function uuidToViewName(uuid: string): string {
  return `view_${uuid.split('-').join('_')}`;
}

interface AddDebugTrackMenuAttrs {
  sqlViewName: string;
  columns: string[];
  engine: EngineProxy;
}

export class AddDebugTrackMenu implements
    m.ClassComponent<AddDebugTrackMenuAttrs> {
  name: string = '';
  sliceColumns: SliceColumns;

  constructor(vnode: m.Vnode<AddDebugTrackMenuAttrs>) {
    const chooseDefaultOption = (name: string) => {
      for (const column of vnode.attrs.columns) {
        if (column === name) return column;
      }
      for (const column of vnode.attrs.columns) {
        if (column.endsWith(`_${name}`)) return column;
      }
      return vnode.attrs.columns[0];
    };

    this.sliceColumns = {
      ts: chooseDefaultOption('ts'),
      dur: chooseDefaultOption('dur'),
      name: chooseDefaultOption('name'),
    };
  }

  view(vnode: m.Vnode<AddDebugTrackMenuAttrs>) {
    const renderSelect = (name: 'ts'|'dur'|'name') => {
      const options = [];
      for (const column of vnode.attrs.columns) {
        options.push(
            m('option',
              {
                selected: this.sliceColumns[name] === column ? true : undefined,
              },
              column));
      }
      return m(TreeNode, {
        left: name,
        right: m(
            Select,
            {
              oninput: (e: Event) => {
                if (!e.target) return;
                this.sliceColumns[name] = (e.target as HTMLSelectElement).value;
              },
            },
            options),
      });
    };
    return [
      m(
          Tree,
          m(TreeNode, {
            left: 'Name',
            right: m(TextInput, {
              onkeydown: (e: KeyboardEvent) => {
                // Allow Esc to close popup.
                if (e.key === 'Escape') return;
                e.stopPropagation();
              },
              oninput: (e: KeyboardEvent) => {
                if (!e.target) return;
                this.name = (e.target as HTMLInputElement).value;
              },
            }),
          }),
          renderSelect('ts'),
          renderSelect('dur'),
          renderSelect('name'),
          ),
      m(Button, {
        label: 'Show',
        onclick: () => {
          addDebugTrack(
              vnode.attrs.engine,
              vnode.attrs.sqlViewName,
              this.name,
              this.sliceColumns,
              vnode.attrs.columns);
        },
      }),
    ];
  }
}