import React, { useState } from 'react';
import { HelpIcon, TickCircleIcon, WarningSignIcon, InfoSignIcon, Checkbox } from 'evergreen-ui';
import i18n from 'i18next';
import { Trans } from 'react-i18next';
import withReactContent from 'sweetalert2-react-content';
import SyntaxHighlighter from 'react-syntax-highlighter';
import { tomorrow as style } from 'react-syntax-highlighter/dist/esm/styles/hljs';
import JSON5 from 'json5';

import { parseDuration, formatDuration } from '../util/duration';
import Swal, { swalToastOptions, toast } from '../swal';
import { parseYouTube } from '../edlFormats';
import CopyClipboardButton from '../components/CopyClipboardButton';
import { isWindows } from '../util';

const { dialog } = window.require('@electron/remote');
const { shell } = window.require('electron');

const ReactSwal = withReactContent(Swal);

export async function promptTimeOffset({ initialValue, title, text }) {
  const { value } = await Swal.fire({
    title,
    text,
    input: 'text',
    inputValue: initialValue || '',
    showCancelButton: true,
    inputPlaceholder: '00:00:00.000',
  });

  if (value === undefined) {
    return undefined;
  }

  const duration = parseDuration(value);
  // Invalid, try again
  if (duration === undefined) return promptTimeOffset({ initialValue: value, title, text });

  return duration;
}

// https://github.com/mifi/lossless-cut/issues/1495
export const showOpenDialog = async ({
  filters = isWindows ? [{ name: i18n.t('All Files'), extensions: ['*'] }] : undefined,
  ...props
}) => dialog.showOpenDialog({ ...props, filters });

export async function askForYouTubeInput() {
  const example = i18n.t('YouTube video description\n00:00 Intro\n00:01 Chapter 2\n00:00:02.123 Chapter 3');
  const { value } = await Swal.fire({
    title: i18n.t('Import text chapters / YouTube'),
    input: 'textarea',
    inputPlaceholder: example,
    text: i18n.t('Paste or type a YouTube chapters description or textual chapter description'),
    showCancelButton: true,
    inputValidator: (v) => {
      if (v) {
        const edl = parseYouTube(v);
        if (edl.length > 0) return undefined;
      }
      return i18n.t('Please input a valid format.');
    },
  });

  return parseYouTube(value);
}

export async function askForInputDir(defaultPath) {
  const { filePaths } = await showOpenDialog({
    properties: ['openDirectory', 'createDirectory'],
    defaultPath,
    title: i18n.t('Please confirm folder'),
    message: i18n.t('Press confirm to grant LosslessCut access to write the project file (due to App Sandbox restrictions).'),
    buttonLabel: i18n.t('Confirm'),
  });
  return (filePaths && filePaths.length === 1) ? filePaths[0] : undefined;
}

export async function askForOutDir(defaultPath) {
  const { filePaths } = await showOpenDialog({
    properties: ['openDirectory', 'createDirectory'],
    defaultPath,
    title: i18n.t('Where do you want to save output files?'),
    message: i18n.t('Where do you want to save output files? Make sure there is enough free space in this folder'),
    buttonLabel: i18n.t('Select output folder'),
  });
  return (filePaths && filePaths.length === 1) ? filePaths[0] : undefined;
}

export async function askForFfPath(defaultPath) {
  const { filePaths } = await showOpenDialog({
    properties: ['openDirectory'],
    defaultPath,
    title: i18n.t('Select custom FFmpeg directory'),
  });
  return (filePaths && filePaths.length === 1) ? filePaths[0] : undefined;
}

export async function askForFileOpenAction(inputOptions) {
  const { value } = await Swal.fire({
    text: i18n.t('You opened a new file. What do you want to do?'),
    icon: 'question',
    input: 'radio',
    inputValue: 'open',
    showCancelButton: true,
    customClass: { input: 'swal2-losslesscut-radio' },
    inputOptions,
    inputValidator: (v) => !v && i18n.t('You need to choose something!'),
  });

  return value;
}

export async function showDiskFull() {
  await Swal.fire({
    icon: 'error',
    text: i18n.t('You ran out of space'),
  });
}

export async function showRefuseToOverwrite() {
  await Swal.fire({
    icon: 'warning',
    text: i18n.t('Output file already exists, refusing to overwrite. You can turn on overwriting in settings.'),
  });
}

export async function askForImportChapters() {
  const { value } = await Swal.fire({
    icon: 'question',
    text: i18n.t('This file has embedded chapters. Do you want to import the chapters as cut-segments?'),
    showCancelButton: true,
    cancelButtonText: i18n.t('Ignore chapters'),
    confirmButtonText: i18n.t('Import chapters'),
  });

  return value;
}

const maxSegments = 300;

async function askForNumSegments() {
  const { value } = await Swal.fire({
    input: 'number',
    inputAttributes: {
      min: 0,
      max: maxSegments,
    },
    showCancelButton: true,
    inputValue: '2',
    text: i18n.t('Divide timeline into a number of equal length segments'),
    inputValidator: (v) => {
      const parsed = parseInt(v, 10);
      if (!Number.isNaN(parsed) && parsed >= 2 && parsed <= maxSegments) return undefined;
      return i18n.t('Please input a valid number of segments');
    },
  });

  if (value == null) return undefined;

  return parseInt(value, 10);
}

export async function createNumSegments(fileDuration) {
  const numSegments = await askForNumSegments();
  if (numSegments == null) return undefined;
  const edl = [];
  const segDuration = fileDuration / numSegments;
  for (let i = 0; i < numSegments; i += 1) {
    edl.push({ start: i * segDuration, end: i === numSegments - 1 ? undefined : (i + 1) * segDuration });
  }
  return edl;
}

const exampleDuration = '00:00:05.123';

async function askForSegmentDuration(fileDuration) {
  const { value } = await Swal.fire({
    input: 'text',
    showCancelButton: true,
    inputValue: '00:00:00.000',
    text: i18n.t('Divide timeline into a number of segments with the specified length'),
    inputValidator: (v) => {
      const duration = parseDuration(v);
      if (duration != null) {
        const numSegments = Math.ceil(fileDuration / duration);
        if (duration > 0 && duration < fileDuration && numSegments <= maxSegments) return undefined;
      }
      return i18n.t('Please input a valid duration. Example: {{example}}', { example: exampleDuration });
    },
  });

  if (value == null) return undefined;

  return parseDuration(value);
}

// https://github.com/mifi/lossless-cut/issues/1153
async function askForSegmentsRandomDurationRange() {
  function parse(str) {
    const match = str.replace(/\s/g, '').match(/^duration([\d.]+)to([\d.]+),gap([-\d.]+)to([-\d.]+)$/i);
    if (!match) return undefined;
    const values = match.slice(1);
    const parsed = values.map((val) => parseFloat(val));

    const durationMin = parsed[0];
    const durationMax = parsed[1];
    const gapMin = parsed[2];
    const gapMax = parsed[3];

    if (!(parsed.every((val) => !Number.isNaN(val)) && durationMin <= durationMax && gapMin <= gapMax && durationMin > 0)) return undefined;
    return { durationMin, durationMax, gapMin, gapMax };
  }

  const { value } = await Swal.fire({
    input: 'text',
    showCancelButton: true,
    inputValue: 'Duration 3 to 5, Gap 0 to 2',
    text: i18n.t('Divide timeline into segments with randomized durations and gaps between segments, in a range specified in seconds with the correct format.'),
    inputValidator: (v) => {
      const parsed = parse(v);
      if (!parsed) return i18n.t('Invalid input');
      return undefined;
    },
  });

  if (value == null) return undefined;

  return parse(value);
}

async function askForSegmentsStartOrEnd(text) {
  const { value } = await Swal.fire({
    input: 'radio',
    showCancelButton: true,
    inputOptions: {
      start: i18n.t('Start'),
      end: i18n.t('End'),
      both: i18n.t('Both'),
    },
    inputValue: 'both',
    text,
  });
  if (!value) return undefined;

  return value === 'both' ? ['start', 'end'] : [value];
}

export async function askForShiftSegments() {
  function parseValue(value) {
    let parseableValue = value;
    let sign = 1;
    if (parseableValue[0] === '-') {
      parseableValue = parseableValue.substring(1);
      sign = -1;
    }
    const duration = parseDuration(parseableValue);
    if (duration != null && duration > 0) {
      return duration * sign;
    }
    return undefined;
  }

  const { value } = await Swal.fire({
    input: 'text',
    showCancelButton: true,
    inputValue: '00:00:00.000',
    text: i18n.t('Shift all segments on the timeline by this amount. Negative values will be shifted back, while positive value will be shifted forward in time.'),
    inputValidator: (v) => {
      const parsed = parseValue(v);
      if (parsed == null) return i18n.t('Please input a valid duration. Example: {{example}}', { example: exampleDuration });
      return undefined;
    },
  });

  if (value == null) return undefined;
  const parsed = parseValue(value);

  const startOrEnd = await askForSegmentsStartOrEnd(i18n.t('Do you want to shift the start or end timestamp by {{time}}?', { time: formatDuration({ seconds: parsed, shorten: true }) }));
  if (startOrEnd == null) return undefined;

  return {
    shiftAmount: parsed,
    shiftKeys: startOrEnd,
  };
}


export async function askForAlignSegments() {
  const startOrEnd = await askForSegmentsStartOrEnd(i18n.t('Do you want to align the segment start or end timestamps to keyframes?'));
  if (startOrEnd == null) return undefined;

  const { value: mode } = await Swal.fire({
    input: 'radio',
    showCancelButton: true,
    inputOptions: {
      nearest: i18n.t('Nearest keyframe'),
      before: i18n.t('Previous keyframe'),
      after: i18n.t('Next keyframe'),
    },
    inputValue: 'before',
    text: i18n.t('Do you want to align segment times to the nearest, previous or next keyframe?'),
  });

  if (mode == null) return undefined;

  return {
    mode,
    startOrEnd,
  };
}

export async function askForMetadataKey() {
  const { value } = await Swal.fire({
    title: i18n.t('Add metadata'),
    text: i18n.t('Enter metadata key'),
    input: 'text',
    showCancelButton: true,
    inputPlaceholder: 'metadata_key',
    inputValidator: (v) => v.includes('=') && i18n.t('Invalid character(s) found in key'),
  });
  return value;
}

export async function confirmExtractAllStreamsDialog() {
  const { value } = await Swal.fire({
    text: i18n.t('Please confirm that you want to extract all tracks as separate files'),
    showCancelButton: true,
    confirmButtonText: i18n.t('Extract all tracks'),
  });
  return !!value;
}

const CleanupChoices = ({ cleanupChoicesInitial, onChange: onChangeProp }) => {
  const [choices, setChoices] = useState(cleanupChoicesInitial);

  const getVal = (key) => !!choices[key];

  const onChange = (key, val) => setChoices((oldChoices) => {
    const newChoices = { ...oldChoices, [key]: val };
    if ((newChoices.trashSourceFile || newChoices.trashTmpFiles) && !newChoices.closeFile) {
      newChoices.closeFile = true;
    }
    onChangeProp(newChoices);
    return newChoices;
  });

  const trashTmpFiles = getVal('trashTmpFiles');
  const trashSourceFile = getVal('trashSourceFile');
  const trashProjectFile = getVal('trashProjectFile');
  const deleteIfTrashFails = getVal('deleteIfTrashFails');
  const closeFile = getVal('closeFile');
  const askForCleanup = getVal('askForCleanup');
  const cleanupAfterExport = getVal('cleanupAfterExport');

  return (
    <div style={{ textAlign: 'left' }}>
      <p>{i18n.t('What do you want to do after exporting a file or when pressing the "delete source file" button?')}</p>

      <Checkbox label={i18n.t('Close currently opened file')} checked={closeFile} disabled={trashSourceFile || trashTmpFiles} onChange={(e) => onChange('closeFile', e.target.checked)} />

      <div style={{ marginTop: 25 }}>
        <Checkbox label={i18n.t('Trash auto-generated files')} checked={trashTmpFiles} onChange={(e) => onChange('trashTmpFiles', e.target.checked)} />
        <Checkbox label={i18n.t('Trash original source file')} checked={trashSourceFile} onChange={(e) => onChange('trashSourceFile', e.target.checked)} />
        <Checkbox label={i18n.t('Trash project LLC file')} checked={trashProjectFile} onChange={(e) => onChange('trashProjectFile', e.target.checked)} />
        <Checkbox label={i18n.t('Permanently delete the files if trash fails?')} disabled={!(trashTmpFiles || trashProjectFile || trashSourceFile)} checked={deleteIfTrashFails} onChange={(e) => onChange('deleteIfTrashFails', e.target.checked)} />
      </div>

      <div style={{ marginTop: 25 }}>
        <Checkbox label={i18n.t('Show this dialog every time?')} checked={askForCleanup} onChange={(e) => onChange('askForCleanup', e.target.checked)} />
        <Checkbox label={i18n.t('Do all of this automatically after exporting a file?')} checked={cleanupAfterExport} onChange={(e) => onChange('cleanupAfterExport', e.target.checked)} />
      </div>
    </div>
  );
};

export async function showCleanupFilesDialog(cleanupChoicesIn) {
  let cleanupChoices = cleanupChoicesIn;

  const { value } = await ReactSwal.fire({
    title: i18n.t('Cleanup files?'),
    html: <CleanupChoices cleanupChoicesInitial={cleanupChoices} onChange={(newChoices) => { cleanupChoices = newChoices; }} />,
    confirmButtonText: i18n.t('Confirm'),
    confirmButtonColor: '#d33',
    showCancelButton: true,
    cancelButtonText: i18n.t('Cancel'),
  });

  if (value) return cleanupChoices;
  return undefined;
}

export async function createFixedDurationSegments(fileDuration) {
  const segmentDuration = await askForSegmentDuration(fileDuration);
  if (segmentDuration == null) return undefined;
  const edl = [];
  for (let start = 0; start < fileDuration; start += segmentDuration) {
    const end = start + segmentDuration;
    edl.push({ start, end: end >= fileDuration ? undefined : end });
  }
  return edl;
}

export async function createRandomSegments(fileDuration) {
  const response = await askForSegmentsRandomDurationRange();
  if (response == null) return undefined;

  const { durationMin, durationMax, gapMin, gapMax } = response;

  const randomInRange = (min, max) => min + Math.random() * (max - min);

  const edl = [];
  for (let start = randomInRange(gapMin, gapMax); start < fileDuration && edl.length < maxSegments; start += randomInRange(gapMin, gapMax)) {
    const end = Math.min(fileDuration, start + randomInRange(durationMin, durationMax));
    edl.push({ start, end });
    start = end;
  }
  return edl;
}

const MovSuggestion = ({ fileFormat }) => fileFormat === 'mp4' && <li><Trans>Change output <b>Format</b> from <b>MP4</b> to <b>MOV</b></Trans></li>;
const OutputFormatSuggestion = () => <li><Trans>Select a different output <b>Format</b> (<b>matroska</b> and <b>mp4</b> support most codecs)</Trans></li>;
const WorkingDirectorySuggestion = () => <li><Trans>Set a different <b>Working directory</b></Trans></li>;
const DifferentFileSuggestion = () => <li><Trans>Try with a <b>Different file</b></Trans></li>;
const HelpSuggestion = () => <li><Trans>See <b>Help</b></Trans> menu</li>;
const ErrorReportSuggestion = () => <li><Trans>If nothing helps, you can send an <b>Error report</b></Trans></li>;

export async function showExportFailedDialog({ fileFormat, safeOutputFileName }) {
  const html = (
    <div style={{ textAlign: 'left' }}>
      <Trans>Try one of the following before exporting again:</Trans>
      <ol>
        {!safeOutputFileName && <li><Trans>Output file names are not sanitized. Try to enable sanitazion or check your segment labels for invalid characters.</Trans></li>}
        <MovSuggestion fileFormat={fileFormat} />
        <OutputFormatSuggestion />
        <li><Trans>Disable unnecessary <b>Tracks</b></Trans></li>
        <li><Trans>Try both <b>Normal cut</b> and <b>Keyframe cut</b></Trans></li>
        <WorkingDirectorySuggestion />
        <DifferentFileSuggestion />
        <HelpSuggestion />
        <ErrorReportSuggestion />
      </ol>
    </div>
  );

  const { value } = await ReactSwal.fire({ title: i18n.t('Unable to export this file'), html, timer: null, showConfirmButton: true, showCancelButton: true, cancelButtonText: i18n.t('OK'), confirmButtonText: i18n.t('Report'), reverseButtons: true, focusCancel: true });
  return value;
}

export async function showConcatFailedDialog({ fileFormat }) {
  const html = (
    <div style={{ textAlign: 'left' }}>
      <Trans>Try each of the following before merging again:</Trans>
      <ol>
        <MovSuggestion fileFormat={fileFormat} />
        <OutputFormatSuggestion />
        <li><Trans>Disable <b>merge options</b></Trans></li>
        <WorkingDirectorySuggestion />
        <DifferentFileSuggestion />
        <HelpSuggestion />
        <ErrorReportSuggestion />
      </ol>
    </div>
  );

  const { value } = await ReactSwal.fire({ title: i18n.t('Unable to merge files'), html, timer: null, showConfirmButton: true, showCancelButton: true, cancelButtonText: i18n.t('OK'), confirmButtonText: i18n.t('Report'), reverseButtons: true, focusCancel: true });
  return value;
}

export function openYouTubeChaptersDialog(text) {
  ReactSwal.fire({
    showCloseButton: true,
    title: i18n.t('YouTube Chapters'),
    html: (
      <div style={{ textAlign: 'left', overflow: 'auto', maxHeight: 300, overflowY: 'auto' }}>

        <p>{i18n.t('Copy to YouTube description/comment:')} <CopyClipboardButton text={text} /></p>

        <div style={{ fontWeight: 600, fontSize: 12, whiteSpace: 'pre-wrap' }} contentEditable suppressContentEditableWarning>
          {text}
        </div>
      </div>
    ),
  });
}

export async function labelSegmentDialog({ currentName, maxLength }) {
  const { value } = await Swal.fire({
    showCancelButton: true,
    title: i18n.t('Label current segment'),
    inputValue: currentName,
    input: 'text',
    inputValidator: (v) => (v.length > maxLength ? `${i18n.t('Max length')} ${maxLength}` : undefined),
  });
  return value;
}

export async function selectSegmentsByLabelDialog(currentName) {
  const { value } = await Swal.fire({
    showCancelButton: true,
    title: i18n.t('Select segments by label'),
    inputValue: currentName,
    input: 'text',
  });
  return value;
}

export async function selectSegmentsByTagDialog() {
  const { value: value1 } = await Swal.fire({
    showCancelButton: true,
    title: i18n.t('Select segments by tag'),
    text: i18n.t('Enter tag name (in the next dialog you\'ll enter tag value)'),
    input: 'text',
  });
  if (!value1) return undefined;

  const { value: value2 } = await Swal.fire({
    showCancelButton: true,
    title: i18n.t('Select segments by tag'),
    text: i18n.t('Enter tag value'),
    input: 'text',
  });
  if (!value2) return undefined;

  return { tagName: value1, tagValue: value2 };
}

export async function showEditableJsonDialog({ text, title, inputLabel, inputValue, inputValidator }) {
  const { value } = await Swal.fire({
    input: 'textarea',
    inputLabel,
    text,
    title,
    inputPlaceholder: JSON5.stringify({ exampleTag: 'Example value' }, null, 2),
    inputValue,
    showCancelButton: true,
    inputValidator,
  });
  return value;
}

export function showJson5Dialog({ title, json }) {
  const html = (
    <SyntaxHighlighter language="javascript" style={style} customStyle={{ textAlign: 'left', maxHeight: 300, overflowY: 'auto', fontSize: 14 }}>
      {JSON5.stringify(json, null, 2)}
    </SyntaxHighlighter>
  );

  ReactSwal.fire({
    showCloseButton: true,
    title,
    html,
  });
}

export async function openDirToast({ filePath, text, html, ...props }) {
  const swal = text ? toast : ReactSwal;

  const { value } = await swal.fire({
    ...swalToastOptions,
    showConfirmButton: true,
    confirmButtonText: i18n.t('Show'),
    showCancelButton: true,
    cancelButtonText: i18n.t('Close'),
    text,
    html,
    ...props,
  });
  if (value) shell.showItemInFolder(filePath);
}

const UnorderedList = ({ children }) => <ul style={{ paddingLeft: '1em' }}>{children}</ul>;
const ListItem = ({ icon: Icon, iconColor, children }) => <li style={{ listStyle: 'none' }}>{Icon && <Icon color={iconColor} size={14} marginRight=".3em" />} {children}</li>;

const Notices = ({ notices }) => notices.map((msg) => <ListItem key={msg} icon={InfoSignIcon} iconColor="info">{msg}</ListItem>);
const Warnings = ({ warnings }) => warnings.map((msg) => <ListItem key={msg} icon={WarningSignIcon} iconColor="warning">{msg}</ListItem>);
const OutputIncorrectSeeHelpMenu = () => <ListItem icon={HelpIcon}>{i18n.t('If output does not look right, see the Help menu.')}</ListItem>;

export async function openExportFinishedToast({ filePath, warnings, notices }) {
  const hasWarnings = warnings.length > 0;
  const html = (
    <UnorderedList>
      <ListItem icon={TickCircleIcon} iconColor={hasWarnings ? 'warning' : 'success'} fontWeight="bold">{hasWarnings ? i18n.t('Export finished with warning(s)', { count: warnings.length }) : i18n.t('Export is done!')}</ListItem>
      <ListItem icon={InfoSignIcon}>{i18n.t('Please test the output file in your desired player/editor before you delete the source file.')}</ListItem>
      <OutputIncorrectSeeHelpMenu />
      <Notices notices={notices} />
      <Warnings warnings={warnings} />
    </UnorderedList>
  );

  await openDirToast({ filePath, html, width: 800, position: 'center', timer: hasWarnings ? undefined : 30000 });
}

export async function openConcatFinishedToast({ filePath, warnings, notices }) {
  const hasWarnings = warnings.length > 0;
  const html = (
    <UnorderedList>
      <ListItem icon={TickCircleIcon} iconColor={hasWarnings ? 'warning' : 'success'} fontWeight="bold">{hasWarnings ? i18n.t('Files merged with warning(s)', { count: warnings.length }) : i18n.t('Files merged!')}</ListItem>
      <ListItem icon={InfoSignIcon}>{i18n.t('Please test the output files in your desired player/editor before you delete the source files.')}</ListItem>
      <OutputIncorrectSeeHelpMenu />
      <Notices notices={notices} />
      <Warnings warnings={warnings} />
    </UnorderedList>
  );

  await openDirToast({ filePath, html, width: 800, position: 'center', timer: 30000 });
}

export async function askForPlaybackRate({ detectedFps, outputPlaybackRate }) {
  const fps = detectedFps || 1;
  const currentFps = fps * outputPlaybackRate;

  function parseValue(v) {
    const newFps = parseFloat(v);
    if (!Number.isNaN(newFps)) {
      return newFps / fps;
    }
    return undefined;
  }

  const { value } = await Swal.fire({
    title: i18n.t('Change FPS'),
    input: 'text',
    inputValue: currentFps.toFixed(5),
    text: i18n.t('This option lets you losslessly change the speed at which media players will play back the exported file. For example if you double the FPS, the playback speed will double (and duration will halve), however all the frames will be intact and played back (but faster). Be careful not to set it too high, as the player might not be able to keep up (playback CPU usage will increase proportionally to the speed!)'),
    showCancelButton: true,
    inputValidator: (v) => {
      const parsed = parseValue(v);
      if (parsed != null) return undefined;
      return i18n.t('Please enter a valid number.');
    },
  });

  if (!value) return undefined;

  return parseValue(value);
}
