import { useEffect, useState } from 'react';

import type { PlatformTheme } from '../../../packages/shared/src/contracts/runtime';
import type { AuthCaptchaChallenge, AuthUser } from '../../services/authService';
import { CaptchaChallengeField } from './CaptchaChallengeField';

type BindPhoneScreenProps = {
  user: AuthUser;
  platformTheme: PlatformTheme;
  sendingCode: boolean;
  binding: boolean;
  error: string;
  captchaChallenge: AuthCaptchaChallenge | null;
  onSendCode: (
    phone: string,
    captcha?: {
      challengeId?: string;
      answer?: string;
    },
  ) => Promise<{
    cooldownSeconds: number;
    expiresInSeconds: number;
  }>;
  onSubmit: (phone: string, code: string) => Promise<void>;
  onLogout: () => Promise<void>;
};

export function BindPhoneScreen({
  user,
  platformTheme,
  sendingCode,
  binding,
  error,
  captchaChallenge,
  onSendCode,
  onSubmit,
  onLogout,
}: BindPhoneScreenProps) {
  const [phone, setPhone] = useState('');
  const [code, setCode] = useState('');
  const [captchaAnswer, setCaptchaAnswer] = useState('');
  const [cooldownSeconds, setCooldownSeconds] = useState(0);
  const [hint, setHint] = useState('');

  useEffect(() => {
    if (cooldownSeconds <= 0) {
      return;
    }

    const timeoutId = window.setTimeout(() => {
      setCooldownSeconds((current) => Math.max(0, current - 1));
    }, 1000);

    return () => {
      window.clearTimeout(timeoutId);
    };
  }, [cooldownSeconds]);

  return (
    <div className={`platform-theme platform-theme--${platformTheme} min-h-screen bg-[var(--platform-body-fill)] px-4 py-6 text-[var(--platform-text-strong)] sm:py-8`}>
      <div className="mx-auto flex min-h-[calc(100vh-3rem)] w-full max-w-5xl items-center justify-center sm:min-h-[calc(100vh-4rem)]">
        <div className="platform-auth-card grid w-full max-w-4xl overflow-hidden rounded-[28px] md:grid-cols-[1.05fr_0.95fr]">
          <div className="border-b border-[var(--platform-subpanel-border)] bg-[linear-gradient(135deg,rgba(255,79,139,0.18),rgba(255,155,120,0.14))] px-6 py-8 md:border-b-0 md:border-r md:px-10 md:py-12">
            <div className="selection-hero-brand selection-hero-brand--left">
              <div className="selection-hero-brand__title">百梦</div>
              <div className="selection-hero-brand__subtitle">视觉叙事 RPG</div>
            </div>
            <p className="mt-8 text-[11px] font-semibold tracking-[0.32em] text-[var(--platform-cool-text)]">
              账号激活
            </p>
            <h1 className="mt-3 text-3xl font-semibold tracking-tight text-[var(--platform-text-strong)] md:text-4xl">
              绑定手机号
            </h1>
            <p className="mt-4 max-w-md text-sm leading-7 text-[var(--platform-text-base)]">
              微信身份已建立，还差最后一步。绑定手机号后，你的账号才会正式激活，并同步到后端存档体系。
            </p>
            <div className="platform-subpanel mt-8 rounded-2xl px-4 py-4 text-sm text-[var(--platform-text-base)]">
              当前登录身份：{user.displayName}
            </div>
          </div>

          <form
            className="flex flex-col justify-center gap-5 px-6 py-8 md:px-10 md:py-12"
            onSubmit={(event) => {
              event.preventDefault();
              void onSubmit(phone, code);
            }}
          >
            <label className="grid gap-2 text-sm text-[var(--platform-text-base)]">
              <span>手机号</span>
              <input
                className="platform-input"
                autoComplete="tel"
                inputMode="numeric"
                value={phone}
                onChange={(event) => setPhone(event.target.value)}
                placeholder="13800000000"
              />
            </label>

            <label className="grid gap-2 text-sm text-[var(--platform-text-base)]">
              <span>验证码</span>
              <div className="flex gap-3">
                <input
                  className="platform-input min-w-0 flex-1"
                  inputMode="numeric"
                  value={code}
                  onChange={(event) => setCode(event.target.value)}
                  placeholder="输入验证码"
                />
                <button
                  type="button"
                  disabled={sendingCode || cooldownSeconds > 0 || !phone.trim()}
                  className="platform-button platform-button--secondary h-12 shrink-0 px-4 text-sm disabled:cursor-not-allowed disabled:opacity-55"
                  onClick={() => {
                    void (async () => {
                      try {
                        const result = await onSendCode(phone, {
                          challengeId: captchaChallenge?.challengeId,
                          answer: captchaAnswer,
                        });
                        setCooldownSeconds(result.cooldownSeconds);
                        setHint(
                          `验证码已发送，有效期约 ${Math.max(1, Math.round(result.expiresInSeconds / 60))} 分钟。`,
                        );
                        setCaptchaAnswer('');
                      } catch {
                        setHint('');
                      }
                    })();
                  }}
                >
                  {sendingCode
                    ? '发送中...'
                    : cooldownSeconds > 0
                      ? `${cooldownSeconds}s`
                      : '获取验证码'}
                </button>
              </div>
            </label>

            {hint ? (
              <div className="platform-banner platform-banner--success text-sm">
                {hint}
              </div>
            ) : null}

            <CaptchaChallengeField
              challenge={captchaChallenge}
              answer={captchaAnswer}
              onAnswerChange={setCaptchaAnswer}
            />

            {error ? (
              <div className="platform-banner platform-banner--danger text-sm">
                {error}
              </div>
            ) : null}

            <button
              type="submit"
              disabled={binding || !phone.trim() || !code.trim()}
              className="platform-button platform-button--primary h-12 px-4 text-base disabled:cursor-not-allowed disabled:opacity-60"
            >
              {binding ? '正在绑定...' : '绑定手机号并进入游戏'}
            </button>

            <button
              type="button"
              className="platform-button platform-button--ghost h-11 px-4 text-sm"
              onClick={() => {
                void onLogout();
              }}
            >
              返回其他登录方式
            </button>
          </form>
        </div>
      </div>
    </div>
  );
}