// Portions of this file are Copyright 2021 Google LLC, and licensed under GPL2+. See COPYING.

import React, { CSSProperties, useContext, useRef, useState } from 'react';
import Editor, { loader, Monaco } from '@monaco-editor/react';
import openscadEditorOptions from '../language/openscad-editor-options';
import * as monaco from 'monaco-editor/esm/vs/editor/editor.api';
import { InputTextarea } from 'primereact/inputtextarea';
import { Button } from 'primereact/button';
import { MenuItem } from 'primereact/menuitem';
import { Menu } from 'primereact/menu';
import { buildUrlForStateParams } from '../state/fragment-state';
import { blankProjectState, defaultSourcePath } from '../state/initial-state';
import { ModelContext, FSContext } from './contexts';
import FilePicker, {  } from './FilePicker';

// const isMonacoSupported = false;
const isMonacoSupported = (() => {
  const ua = window.navigator.userAgent;
  const iosWk = ua.match(/iPad|iPhone/i) && ua.match(/WebKit/i);
  return !iosWk;
})();

let monacoInstance: Monaco | null = null;
if (isMonacoSupported) {
  loader.init().then(mi => monacoInstance = mi);
}

export default function EditorPanel({className, style}: {className?: string, style?: CSSProperties}) {

  const model = useContext(ModelContext);
  if (!model) throw new Error('No model');

  const menu = useRef<Menu>(null);

  const state = model.state;

  const [editor, setEditor] = useState(null as monaco.editor.IStandaloneCodeEditor | null)

  if (editor) {
    const checkerRun = state.lastCheckerRun;
    const editorModel = editor.getModel();
    if (editorModel) {
      if (checkerRun && monacoInstance) {
        monacoInstance.editor.setModelMarkers(editorModel, 'openscad', checkerRun.markers);
      }
    }
  }

  const onMount = (editor: monaco.editor.IStandaloneCodeEditor) => {
    editor.addAction({
      id: "openscad-render",
      label: "Render OpenSCAD",
      keybindings: [
        monaco.KeyMod.CtrlCmd | monaco.KeyCode.Enter,
        monaco.KeyCode.F6,
      ],
      run: () => model.render({isPreview: false, now: true})
    });
    editor.addAction({
      id: "openscad-preview",
      label: "Preview OpenSCAD",
      keybindings: [monaco.KeyCode.F5],
      run: () => model.render({isPreview: true, now: true})
    });
    setEditor(editor)
  }

  return (
    <div className={`editor-panel ${className ?? ''}`} style={{
      // maxWidth: '5 0vw',
      display: 'flex',
      flexDirection: 'column',
      // position: 'relative',
      // width: '100%', height: '100%',
      ...(style ?? {})
    }}>
      <div className='flex flex-row gap-2' style={{
        margin: '5px',
      }}>
          
        <Menu model={[
          {
            label: "New project",
            icon: 'pi pi-plus-circle',
            url: buildUrlForStateParams(blankProjectState),
            target: '_blank',
          },
          {
            // TODO: share text, title and rendering image
            // https://developer.mozilla.org/en-US/docs/Web/API/Navigator/share
            label: 'Share project',
            icon: 'pi pi-share-alt',
            disabled: true,
          },
          {
            separator: true
          },  
          {
            // TODO: popup to ask for file name
            label: "New file",
            icon: 'pi pi-plus',
            disabled: true,
          },
          {
            label: "Copy to new file",
            icon: 'pi pi-clone',
            disabled: true,
          },
          {
            label: "Upload file(s)",
            icon: 'pi pi-upload',
            disabled: true,
          },
          {
            label: 'Download sources',
            icon: 'pi pi-download',
            disabled: true,
          },
          {
            separator: true
          },
          // https://vscode-docs.readthedocs.io/en/stable/customization/keybindings/
          // {
          //   label: 'Undo',
          //   icon: 'pi pi-undo',
          //   // disabled: true,
          //   command: () => editor?.trigger(state.params.sourcePath, 'editor.action.undoAction', null),
          // },
          // {
          //   label: 'Redo',
          //   icon: 'pi pi-reply',
          //   // disabled: true,
          //   command: () => editor?.trigger(state.params.sourcePath, 'editor.action.redoAction', null),
          // },
          {
            separator: true
          },
          // {
          //   label: 'Copy',
          //   icon: 'pi pi-copy',
          //   // disabled: true,
          //   command: () => editor?.trigger(state.params.sourcePath, 'editor.action.clipboardCopyAction', null),
          // },
          // {
            //   label: 'Cut',
            //   icon: 'pi pi-eraser',
            //   // disabled: true,
            //   command: () => editor?.trigger(state.params.sourcePath, 'editor.action.clipboardCutAction', null),
            // },
            // {
              //   label: 'Paste',
              //   icon: 'pi pi-images',
              //   // disabled: true,
              //   command: () => editor?.trigger(state.params.sourcePath, 'editor.action.clipboardPasteAction', null),
              // },
              {
                label: 'Select All',
                icon: 'pi pi-info-circle',
                // disabled: true,
                command: () => editor?.trigger(state.params.sourcePath, 'editor.action.selectAll', null),
              },
              {
                separator: true
              },
              {
                label: 'Find',
                icon: 'pi pi-search',
                // disabled: true,
                command: () => editor?.trigger(state.params.sourcePath, 'actions.find', null),
              },
        ] as MenuItem[]} popup ref={menu} />
        <Button title="Editor menu" rounded text icon="pi pi-ellipsis-h" onClick={(e) => menu.current && menu.current.toggle(e)} />
        
        <FilePicker 
            style={{
              flex: 1,
            }}/>

        {state.params.sourcePath !== defaultSourcePath && 
          <Button icon="pi pi-chevron-left" 
          text
          onClick={() => model.openFile(defaultSourcePath)} 
          title={`Go back to ${defaultSourcePath}`}/>}

      </div>

      
      <div style={{
        position: 'relative',
        flex: 1
      }}>
        {isMonacoSupported && (
          <Editor
            className="openscad-editor absolute-fill"
            defaultLanguage="openscad"
            path={state.params.sourcePath}
            value={state.params.source}
            onChange={s => model.source = s ?? ''}
            onMount={onMount} // TODO: This looks a bit silly, does it trigger a re-render??
            options={{
              ...openscadEditorOptions,
              fontSize: 16,
              lineNumbers: state.view.lineNumbers ? 'on' : 'off',
              // readOnly: !isFileWritable(state.params.sourcePath)
            }}
          />
        )}
        {!isMonacoSupported && (
          <InputTextarea 
            style={{
              backgroundColor: 'transparent',
            }}
            className="openscad-editor absolute-fill"
            value={state.params.source}
            onChange={s => model.source = s.target.value ?? ''}  
          />
        )}
      </div>

      <div style={{
        display: state.view.logs ? undefined : 'none',
        overflowY: 'scroll',
        height: 'calc(min(200px, 30vh))',
      }}>
        <pre><code id="logs" style={{
        }}>{state.lastCheckerRun?.logText ?? 'No log yet!'}</code></pre>
      </div>
    
    </div>
  )
}