import XMarkIcon from '@heroicons/react/20/solid/XMarkIcon';
import { logger } from '@strudel.cycles/core';
import { useEvent, cx } from '@strudel.cycles/react';
// import { cx } from '@strudel.cycles/react';
import { nanoid } from 'nanoid';
import React, { useCallback, useLayoutEffect, useRef, useState } from 'react';
import { loadedSamples } from './Repl';
import { Reference } from './Reference';
import { themes } from './themes.mjs';
import useStore from '../useStore.mjs';

export function Footer({ context }) {
  // const [activeFooter, setActiveFooter] = useState('console');
  // const { activeFooter, setActiveFooter, isZen } = useContext?.(ReplContext);
  const { activeFooter, setActiveFooter, isZen } = context;
  const footerContent = useRef();
  const [log, setLog] = useState([]);

  useLayoutEffect(() => {
    if (footerContent.current && activeFooter === 'console') {
      // scroll log box to bottom when log changes
      footerContent.current.scrollTop = footerContent.current?.scrollHeight;
    }
  }, [log, activeFooter]);
  useLayoutEffect(() => {
    if (!footerContent.current) {
    } else if (activeFooter === 'console') {
      footerContent.current.scrollTop = footerContent.current?.scrollHeight;
    } else {
      footerContent.current.scrollTop = 0;
    }
  }, [activeFooter]);

  useLogger(
    useCallback((e) => {
      const { message, type, data } = e.detail;
      setLog((l) => {
        const lastLog = l.length ? l[l.length - 1] : undefined;
        const id = nanoid(12);
        // if (type === 'loaded-sample' && lastLog.type === 'load-sample' && lastLog.url === data.url) {
        if (type === 'loaded-sample') {
          // const loadIndex = l.length - 1;
          const loadIndex = l.findIndex(({ data: { url }, type }) => type === 'load-sample' && url === data.url);
          l[loadIndex] = { message, type, id, data };
        } else if (lastLog && lastLog.message === message) {
          l = l.slice(0, -1).concat([{ message, type, count: (lastLog.count ?? 1) + 1, id, data }]);
        } else {
          l = l.concat([{ message, type, id, data }]);
        }
        return l.slice(-20);
      });
    }, []),
  );

  const FooterTab = ({ children, name, label }) => (
    <>
      <div
        onClick={() => setActiveFooter(name)}
        className={cx(
          'h-8 px-2 text-foreground cursor-pointer hover:opacity-50 flex items-center space-x-1 border-b',
          activeFooter === name ? 'border-foreground' : 'border-transparent',
        )}
      >
        {label || name}
      </div>
      {activeFooter === name && <>{children}</>}
    </>
  );
  if (isZen) {
    return null;
  }
  return (
    <footer className="bg-lineHighlight z-[20]">
      <div className="flex justify-between px-2">
        <div className={cx('flex select-none max-w-full overflow-auto', activeFooter && 'pb-2')}>
          <FooterTab name="intro" label="welcome" />
          <FooterTab name="samples" />
          <FooterTab name="console" />
          <FooterTab name="reference" />
          <FooterTab name="settings" />
        </div>
        {activeFooter !== '' && (
          <button onClick={() => setActiveFooter('')} className="text-foreground" aria-label="Close Panel">
            <XMarkIcon className="w-5 h-5" />
          </button>
        )}
      </div>
      {activeFooter !== '' && (
        <div
          className="text-white font-mono text-sm h-[360px] flex-none overflow-auto max-w-full relative"
          ref={footerContent}
        >
          {activeFooter === 'intro' && <WelcomeTab />}
          {activeFooter === 'console' && <ConsoleTab log={log} />}
          {activeFooter === 'samples' && <SamplesTab />}
          {activeFooter === 'reference' && <Reference />}
          {activeFooter === 'settings' && <SettingsTab />}
        </div>
      )}
    </footer>
  );
}

function useLogger(onTrigger) {
  useEvent(logger.key, onTrigger);
}

function linkify(inputText) {
  var replacedText, replacePattern1, replacePattern2, replacePattern3;

  //URLs starting with http://, https://, or ftp://
  replacePattern1 = /(\b(https?|ftp):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/gim;
  replacedText = inputText.replace(replacePattern1, '<a class="underline" href="$1" target="_blank">$1</a>');

  //URLs starting with "www." (without // before it, or it'd re-link the ones done above).
  replacePattern2 = /(^|[^\/])(www\.[\S]+(\b|$))/gim;
  replacedText = replacedText.replace(
    replacePattern2,
    '$1<a class="underline" href="http://$2" target="_blank">$2</a>',
  );

  //Change email addresses to mailto:: links.
  replacePattern3 = /(([a-zA-Z0-9\-\_\.])+@[a-zA-Z\_]+?(\.[a-zA-Z]{2,6})+)/gim;
  replacedText = replacedText.replace(replacePattern3, '<a class="underline" href="mailto:$1">$1</a>');

  return replacedText;
}

function WelcomeTab() {
  return (
    <div className="prose dark:prose-invert max-w-[600px] pt-2 font-sans pb-8 px-4">
      <h3>
        <span className={cx('animate-spin inline-block select-none')}>🌀</span> welcome
      </h3>
      <p>
        You have found <span className="underline">strudel</span>, a new live coding platform to write dynamic music
        pieces in the browser! It is free and open-source and made for beginners and experts alike. To get started:
        <br />
        <br />
        <span className="underline">1. hit play</span> - <span className="underline">2. change something</span> -{' '}
        <span className="underline">3. hit update</span>
        <br />
        If you don't like what you hear, try <span className="underline">shuffle</span>!
      </p>
      <p>
        To learn more about what this all means, check out the{' '}
        <a href="./learn/getting-started" target="_blank">
          interactive tutorial
        </a>
        . Also feel free to join the{' '}
        <a href="https://discord.com/invite/HGEdXmRkzT" target="_blank">
          tidalcycles discord channel
        </a>{' '}
        to ask any questions, give feedback or just say hello.
      </p>
      <h3>about</h3>
      <p>
        strudel is a JavaScript version of{' '}
        <a href="tidalcycles.org/" target="_blank">
          tidalcycles
        </a>
        , which is a popular live coding language for music, written in Haskell. You can find the source code at{' '}
        <a href="https://github.com/tidalcycles/strudel" target="_blank">
          github
        </a>
        . Please consider to{' '}
        <a href="https://opencollective.com/tidalcycles" target="_blank">
          support this project
        </a>{' '}
        to ensure ongoing development 💖
      </p>
    </div>
  );
}

function ConsoleTab({ log }) {
  return (
    <div id="console-tab" className="break-all px-4 dark:text-white text-stone-900">
      <pre>{`███████╗████████╗██████╗ ██╗   ██╗██████╗ ███████╗██╗     
██╔════╝╚══██╔══╝██╔══██╗██║   ██║██╔══██╗██╔════╝██║     
███████╗   ██║   ██████╔╝██║   ██║██║  ██║█████╗  ██║     
╚════██║   ██║   ██╔══██╗██║   ██║██║  ██║██╔══╝  ██║     
███████║   ██║   ██║  ██║╚██████╔╝██████╔╝███████╗███████╗
╚══════╝   ╚═╝   ╚═╝  ╚═╝ ╚═════╝ ╚═════╝ ╚══════╝╚══════╝`}</pre>
      {log.map((l, i) => {
        const message = linkify(l.message);
        return (
          <div key={l.id} className={cx(l.type === 'error' && 'text-red-500', l.type === 'highlight' && 'underline')}>
            <span dangerouslySetInnerHTML={{ __html: message }} />
            {l.count ? ` (${l.count})` : ''}
          </div>
        );
      })}
    </div>
  );
}

function SamplesTab() {
  return (
    <div id="samples-tab" className="break-normal w-full px-4 dark:text-white text-stone-900">
      <span>{loadedSamples.length} banks loaded:</span>
      {loadedSamples.map(([name, samples]) => (
        <span key={name} className="cursor-pointer hover:opacity-50" onClick={() => {}}>
          {' '}
          {name}(
          {Array.isArray(samples) ? samples.length : typeof samples === 'object' ? Object.values(samples).length : 1}){' '}
        </span>
      ))}
    </div>
  );
}

function ButtonGroup({ value, onChange, items }) {
  return (
    <div className="flex grow border border-foreground rounded-md">
      {Object.entries(items).map(([key, label], i, arr) => (
        <button
          key={key}
          onClick={() => onChange(key)}
          className={cx(
            'p-2 grow',
            i === 0 && 'rounded-l-md',
            i === arr.length - 1 && 'rounded-r-md',
            value === key ? 'bg-background' : 'bg-lineHighlight',
          )}
        >
          {label}
        </button>
      ))}
    </div>
  );
}

function SelectInput({ value, options, onChange }) {
  return (
    <select
      className="p-2 bg-background rounded-md text-foreground"
      value={value}
      onChange={(e) => onChange(e.target.value)}
    >
      {Object.entries(options).map(([k, label]) => (
        <option key={k} className="bg-background" value={k}>
          {label}
        </option>
      ))}
    </select>
  );
}

function NumberSlider({ value, onChange, step = 1, ...rest }) {
  return (
    <div className="flex space-x-2 gap-1">
      <input
        className="p-2 grow"
        type="range"
        value={value}
        step={step}
        onChange={(e) => onChange(Number(e.target.value))}
        {...rest}
      />
      <input
        type="number"
        value={value}
        step={step}
        className="w-16 bg-background rounded-md"
        onChange={(e) => onChange(Number(e.target.value))}
      />
    </div>
  );
}

function FormItem({ label, children }) {
  return (
    <div className="grid gap-2">
      <label>{label}</label>
      {children}
    </div>
  );
}

const themeOptions = Object.fromEntries(Object.keys(themes).map((k) => [k, k]));
const fontFamilyOptions = {
  monospace: 'monospace',
  BigBlueTerminal: 'BigBlueTerminal',
  x3270: 'x3270',
  PressStart: 'PressStart2P',
};

function SettingsTab() {
  const { state, update, reset } = useStore();
  const { theme, keybindings, fontSize, fontFamily } = state;
  return (
    <div className="text-foreground p-4 space-y-4">
      <FormItem label="Theme">
        <SelectInput
          options={themeOptions}
          value={theme}
          onChange={(theme) => update((current) => ({ ...current, theme }))}
        />
      </FormItem>
      <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
        <FormItem label="Font Family">
          <SelectInput
            options={fontFamilyOptions}
            value={fontFamily}
            onChange={(fontFamily) => update((current) => ({ ...current, fontFamily }))}
          />
        </FormItem>
        <FormItem label="Font Size">
          <NumberSlider
            value={fontSize}
            onChange={(fontSize) => update((current) => ({ ...current, fontSize }))}
            min={10}
            max={40}
            step={2}
          />
        </FormItem>
      </div>
      <FormItem label="Keybindings">
        <ButtonGroup
          value={keybindings}
          onChange={(keybindings) => update((current) => ({ ...current, keybindings }))}
          items={{ codemirror: 'Codemirror', vim: 'Vim', emacs: 'Emacs' }}
        ></ButtonGroup>
      </FormItem>
      <FormItem label="Reset Settings">
        <button
          className="bg-background p-2 max-w-[300px] rounded-md hover:opacity-50"
          onClick={() => {
            if (confirm('Sure?')) {
              reset();
            }
          }}
        >
          restore default settings
        </button>
      </FormItem>
    </div>
  );
}