// 首次启动引导（11F）：欢迎 → 权限 → 登录 → 试一试。
// 规格见 doc/frontend-design.html 4.3；完成 / 关窗后置 onboarding_done。
import { useEffect, useState } from 'react';
import { createRoot } from 'react-dom/client';
import '@dudu/design/styles.css';
import { Button } from '@dudu/design/components/core/Button';
import { Badge } from '@dudu/design/components/core/Badge';
import { HotkeyCombo } from '@dudu/design/components/core/Kbd';
import { Icon } from '@dudu/design/components/core/Icon';
import { invoke } from '../shared/tauri';
import { setThemePref } from '../shared/theme';
import { usePoll } from '../shared/usePoll';

const isMac = navigator.platform.toUpperCase().includes('MAC');
const STEPS = ['welcome', 'perms', 'login', 'try'];

function Dots({ step }) {
  return (
    <div style={{ display: 'flex', gap: 7, justifyContent: 'center' }}>
      {STEPS.map((s, i) => (
        <span key={s} style={{
          width: i === step ? 18 : 6, height: 6, borderRadius: 'var(--radius-full)',
          background: i === step ? 'var(--accent)' : 'var(--border-2)',
          transition: 'all var(--dur-base) var(--ease-out)',
        }} />
      ))}
    </div>
  );
}

function Title({ children }) {
  return <div style={{ fontSize: 'var(--text-2xl)', fontWeight: 'var(--weight-semibold)', color: 'var(--text-1)', textAlign: 'center' }}>{children}</div>;
}

function Desc({ children }) {
  return <div style={{ fontSize: 'var(--text-sm)', color: 'var(--text-2)', textAlign: 'center', lineHeight: 1.7 }}>{children}</div>;
}

// 权限检测卡片：状态徽标 + 去开启按钮
function PermCard({ icon, title, desc, granted, onGrant }) {
  return (
    <div style={{
      display: 'flex', alignItems: 'center', gap: 12, padding: '14px 16px',
      borderRadius: 'var(--radius-md)', border: '1px solid var(--border-1)', background: 'var(--surface-card)',
    }}>
      <span style={{
        width: 36, height: 36, flex: 'none', borderRadius: 'var(--radius-sm)',
        background: 'var(--accent-soft)', color: 'var(--accent-text)',
        display: 'flex', alignItems: 'center', justifyContent: 'center',
      }}>{icon}</span>
      <span style={{ flex: 1, minWidth: 0 }}>
        <span style={{ display: 'block', fontSize: 'var(--text-base)', fontWeight: 'var(--weight-medium)', color: 'var(--text-1)' }}>{title}</span>
        <span style={{ display: 'block', fontSize: 'var(--text-xs)', color: 'var(--text-3)', marginTop: 2 }}>{desc}</span>
      </span>
      {granted ? <Badge tone="green">已开启</Badge> : <Button variant="secondary" size="sm" onClick={onGrant}>去开启</Button>}
    </div>
  );
}

const MicIcon = <Icon name="mic" size={18} />;

const KeyIcon = <Icon name="key" size={18} />;

function OnboardingApp() {
  const [step, setStep] = useState(0);
  const [micOk, setMicOk] = useState(false);
  const [axOk, setAxOk] = useState(!isMac);
  const [me, setMe] = useState(null);

  useEffect(() => {
    invoke('get_settings').then((s) => s && setThemePref(s.theme));
  }, []);

  // 权限步：辅助功能状态轮询（用户去系统设置开启后自动变绿）
  usePoll(async (alive) => {
    const ok = await invoke('check_accessibility');
    if (alive()) setAxOk(!!ok);
  }, 1000, [step], STEPS[step] === 'perms' && isMac);

  // 登录步：轮询账号，扫码成功后自动亮起
  usePoll(async (alive) => {
    const m = await invoke('fetch_me');
    if (alive() && m) setMe(m);
  }, 1500, [step], STEPS[step] === 'login');

  const next = () => setStep((s) => Math.min(s + 1, STEPS.length - 1));
  const prev = () => setStep((s) => Math.max(s - 1, 0));
  const finish = () => invoke('finish_onboarding');

  let body = null;
  let primary = null;
  const name = STEPS[step];

  if (name === 'welcome') {
    body = (
      <>
        <span style={{
          width: 64, height: 64, borderRadius: 18, background: 'var(--accent)', color: 'var(--text-on-accent)',
          display: 'flex', alignItems: 'center', justifyContent: 'center', margin: '0 auto',
        }}>
          <Icon name="mic" size={30} />
        </span>
        <Title>dudu 语音输入</Title>
        <Desc>按住快捷键说话，松开文字就出现在光标处<br />全程比打字快三倍</Desc>
      </>
    );
    primary = <Button variant="primary" block onClick={next}>继续</Button>;
  } else if (name === 'perms') {
    body = (
      <>
        <Title>先开两个权限</Title>
        <Desc>{isMac ? '麦克风用来听你说话，辅助功能让文字上屏' : '麦克风用来听你说话'}</Desc>
        <div style={{ display: 'flex', flexDirection: 'column', gap: 10, marginTop: 4 }}>
          <PermCard icon={MicIcon} title="麦克风" desc="录入你的声音"
            granted={micOk}
            onGrant={() => invoke('request_microphone').then((ok) => setMicOk(!!ok))} />
          {isMac && (
            <PermCard icon={KeyIcon} title="辅助功能" desc="把识别结果输入到任意应用"
              granted={axOk}
              onGrant={() => invoke('open_accessibility_settings')} />
          )}
        </div>
      </>
    );
    primary = <Button variant="primary" block onClick={next}>{micOk && axOk ? '下一步' : '稍后开启，先继续'}</Button>;
  } else if (name === 'login') {
    body = (
      <>
        <Title>登录同步时长</Title>
        <Desc>微信扫码登录，购买的时长跟着账号走<br />也可以先试用，每天免费 3 分钟</Desc>
        <div style={{ display: 'flex', justifyContent: 'center', marginTop: 4 }}>
          {me ? (
            <span style={{ display: 'inline-flex', alignItems: 'center', gap: 8, fontSize: 'var(--text-sm)', color: 'var(--text-1)' }}>
              {me.nickname_masked} <Badge tone="green">已登录</Badge>
            </span>
          ) : (
            <Button variant="secondary" onClick={() => invoke('open_login')}>微信扫码登录</Button>
          )}
        </div>
      </>
    );
    primary = <Button variant="primary" block onClick={next}>{me ? '下一步' : '先试用，跳过'}</Button>;
  } else {
    body = (
      <>
        <Title>试一试</Title>
        <Desc>点一下下面的输入框，按住快捷键说句话，松开看看</Desc>
        <div style={{ display: 'flex', justifyContent: 'center' }}>
          <HotkeyCombo keys={['⌘', '⇧', 'Space']} />
        </div>
        <textarea
          autoFocus
          placeholder="文字会出现在这里"
          style={{
            width: '100%', height: 88, resize: 'none', boxSizing: 'border-box',
            padding: '10px 12px', borderRadius: 'var(--radius-md)',
            border: '1px solid var(--border-1)', background: 'var(--surface-card)',
            color: 'var(--text-1)', fontSize: 'var(--text-base)', fontFamily: 'var(--font-sans)',
            lineHeight: 1.6, outline: 'none',
          }} />
      </>
    );
    primary = <Button variant="primary" block onClick={finish}>开始使用</Button>;
  }

  return (
    <div style={{
      fontFamily: 'var(--font-sans)', background: 'var(--bg-app)', minHeight: '100vh',
      boxSizing: 'border-box', padding: '34px 44px 24px',
      display: 'flex', flexDirection: 'column', gap: 14,
    }}>
      <div style={{ flex: 1, display: 'flex', flexDirection: 'column', justifyContent: 'center', gap: 14 }}>
        {body}
      </div>
      <Dots step={step} />
      <div style={{ display: 'flex', gap: 10, alignItems: 'center' }}>
        {step > 0 && <Button variant="ghost" onClick={prev}>上一步</Button>}
        <span style={{ flex: 1 }}>{primary}</span>
      </div>
    </div>
  );
}

createRoot(document.getElementById('root')).render(<OnboardingApp />);
