import { useState, useCallback } from 'react';
import { motion } from 'motion/react';
import {
  VideoFilled,
  ShareFilled,
} from '@/shared/icons/FilledIcons';
import { Button } from '@/shared/ui/button';
import { Input } from '@/shared/ui/input';
import { Textarea } from '@/shared/ui/textarea';
import { MOCK_CONTENT, INITIAL_CHANNELS } from '../data/distributionMocks';

// ─── 컴포넌트 ───

export default function DistributionPage() {
  const [channels, setChannels] = useState(INITIAL_CHANNELS);
  const [title, setTitle] = useState(MOCK_CONTENT.title);
  const [description, setDescription] = useState(MOCK_CONTENT.description);
  const [tags] = useState(MOCK_CONTENT.tags);
  const [scheduleMode, setScheduleMode] = useState<'now' | 'scheduled'>('now');
  const [scheduleDate, setScheduleDate] = useState('');
  const [scheduleHour, setScheduleHour] = useState(9);
  const [scheduleMinute, setScheduleMinute] = useState(0);
  const [schedulePeriod, setSchedulePeriod] = useState<'AM' | 'PM'>('AM');
  const [isPublishing, setIsPublishing] = useState(false);

  const selectedChannels = channels.filter(c => c.connected && c.selected);
  const allPublished = selectedChannels.length > 0 && selectedChannels.every(c => c.status === 'published');

  const toggleChannel = useCallback((id: string) => {
    setChannels(prev => prev.map(c =>
      c.id === id && c.connected ? { ...c, selected: !c.selected } : c
    ));
  }, []);

  const handlePublish = useCallback(() => {
    setIsPublishing(true);

    // 순차 발행 시뮬레이션
    const selected = channels.filter(c => c.connected && c.selected);
    selected.forEach((ch, i) => {
      setTimeout(() => {
        setChannels(prev => prev.map(c =>
          c.id === ch.id ? { ...c, status: 'publishing' } : c
        ));
      }, i * 1500);

      setTimeout(() => {
        setChannels(prev => prev.map(c =>
          c.id === ch.id ? { ...c, status: 'published' } : c
        ));
        if (i === selected.length - 1) setIsPublishing(false);
      }, (i + 1) * 1500 + 500);
    });
  }, [channels]);

  return (
    <div className="pt-20 min-h-screen">
      {/* Header */}
      <div className="bg-brand-navy py-14 px-6 relative overflow-hidden">
        <div className="absolute top-0 right-0 w-[500px] h-[500px] rounded-full bg-brand-purple-vivid/10 blur-[120px]" />
        <div className="max-w-5xl mx-auto relative">
          <p className="text-xs font-semibold text-purple-300 tracking-widest uppercase mb-3">Content Distribution</p>
          <h1 className="font-serif text-3xl md:text-4xl font-bold text-white mb-3">
            콘텐츠 배포
          </h1>
          <p className="text-purple-200/70 max-w-xl">
            제작된 콘텐츠를 연결된 채널에 동시 배포합니다.
          </p>
        </div>
      </div>

      <div className="max-w-5xl mx-auto px-6 py-10">
        <div className="grid grid-cols-1 lg:grid-cols-3 gap-8">

          {/* Left: Content Preview + Meta */}
          <div className="lg:col-span-1">
            <h3 className="font-serif font-bold text-xl text-brand-navy mb-4">콘텐츠</h3>

            {/* Video Preview */}
            <div className="w-full aspect-[9/16] max-w-[220px] mx-auto rounded-2xl bg-gradient-to-br from-brand-tint-purple via-white to-brand-earth-bg border border-slate-200 flex flex-col items-center justify-center mb-6">
              <VideoFilled size={32} className="text-brand-purple-soft mb-3" />
              <p className="text-xs text-slate-500">{MOCK_CONTENT.aspectRatio}</p>
              <p className="text-xs text-slate-400 mt-1">{MOCK_CONTENT.duration}</p>
            </div>

            {/* Title */}
            <div className="mb-4">
              <label className="text-xs font-medium text-slate-600 mb-1 block">제목</label>
              <Input
                value={title}
                onChange={e => setTitle(e.target.value)}
                className="w-full px-4 py-3 h-auto rounded-xl border-slate-200 text-sm text-slate-700 focus-visible:border-brand-purple-vivid focus-visible:ring-brand-purple-vivid/20"
              />
            </div>

            {/* Description */}
            <div className="mb-4">
              <label className="text-xs font-medium text-slate-600 mb-1 block">설명</label>
              <Textarea
                value={description}
                onChange={e => setDescription(e.target.value)}
                rows={4}
                className="w-full px-4 py-3 rounded-xl border-slate-200 text-sm text-slate-700 resize-y focus-visible:border-brand-purple-vivid focus-visible:ring-brand-purple-vivid/20"
              />
            </div>

            {/* Tags */}
            <div>
              <label className="text-xs font-medium text-slate-600 mb-2 block">태그</label>
              <div className="flex flex-wrap gap-2">
                {tags.map(tag => (
                  <span
                    key={tag}
                    className="px-3 py-1 rounded-full bg-brand-tint-purple text-brand-purple-muted text-xs font-medium border border-brand-tint-lavender"
                  >
                    #{tag}
                  </span>
                ))}
              </div>
            </div>
          </div>

          {/* Right: Channel Selection + Schedule + Publish */}
          <div className="lg:col-span-2">
            {/* Channel Selection */}
            <h3 className="font-serif font-bold text-xl text-brand-navy mb-4">배포 채널 선택</h3>

            <div className="space-y-3 mb-8">
              {channels.map(ch => {
                const Icon = ch.icon;
                return (
                  <motion.div
                    key={ch.id}
                    layout
                    className={`flex items-center gap-4 p-4 rounded-2xl border-2 transition-all ${
                      !ch.connected
                        ? 'border-slate-100 bg-slate-50/50 opacity-50'
                        : ch.selected
                          ? 'border-brand-purple-vivid bg-brand-tint-purple/20 shadow-[3px_4px_12px_rgba(108,92,231,0.08)]'
                          : 'border-slate-100 bg-white shadow-[3px_4px_12px_rgba(0,0,0,0.04)] hover:border-brand-tint-lavender'
                    }`}
                  >
                    {/* Checkbox */}
                    <Button
                      variant="ghost"
                      size="icon-sm"
                      onClick={() => toggleChannel(ch.id)}
                      disabled={!ch.connected}
                      className={`w-5 h-5 rounded border-2 flex items-center justify-center shrink-0 p-0 transition-all hover:bg-transparent ${
                        ch.selected && ch.connected
                          ? 'border-brand-purple-vivid bg-brand-purple-vivid hover:bg-brand-purple-vivid'
                          : 'border-slate-300 bg-white'
                      } disabled:cursor-not-allowed`}
                    >
                      {ch.selected && ch.connected && (
                        <svg width="10" height="10" viewBox="0 0 14 14" fill="none">
                          <path d="M2 7L5.5 10.5L12 3.5" stroke="white" strokeWidth="2.5" strokeLinecap="round" strokeLinejoin="round" />
                        </svg>
                      )}
                    </Button>

                    {/* Icon */}
                    <div
                      className="w-10 h-10 rounded-xl flex items-center justify-center shrink-0"
                      style={{ backgroundColor: ch.bgColor }}
                    >
                      <Icon size={20} style={{ color: ch.brandColor }} />
                    </div>

                    {/* Info */}
                    <div className="flex-1 min-w-0">
                      <div className="flex items-center gap-2">
                        <span className="text-sm font-semibold text-brand-navy">{ch.name}</span>
                        {!ch.connected && (
                          <span className="px-2 py-1 rounded-full bg-brand-earth-bg text-brand-earth text-xs font-semibold border border-brand-earth-soft">
                            미연결
                          </span>
                        )}
                      </div>
                      <p className="text-xs text-slate-400">{ch.format}</p>
                    </div>

                    {/* Status */}
                    <div className="shrink-0">
                      {ch.status === 'publishing' && (
                        <div className="w-5 h-5 border-2 border-brand-purple-vivid border-t-transparent rounded-full animate-spin" />
                      )}
                      {ch.status === 'published' && (
                        <div className="w-6 h-6 rounded-full bg-brand-purple-vivid flex items-center justify-center">
                          <svg width="12" height="12" viewBox="0 0 14 14" fill="none">
                            <path d="M2 7L5.5 10.5L12 3.5" stroke="white" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" />
                          </svg>
                        </div>
                      )}
                      {ch.status === 'failed' && (
                        <div className="w-6 h-6 rounded-full bg-brand-rose-bg flex items-center justify-center border border-brand-rose-soft">
                          <span className="text-brand-rose text-xs font-bold">!</span>
                        </div>
                      )}
                    </div>
                  </motion.div>
                );
              })}
            </div>

            {/* Schedule */}
            <h3 className="font-serif font-bold text-xl text-brand-navy mb-4">배포 시간</h3>
            <div className="flex gap-2 mb-4">
              {([
                { key: 'now' as const, label: '즉시 배포' },
                { key: 'scheduled' as const, label: '예약 배포' },
              ]).map(opt => (
                <Button
                  key={opt.key}
                  variant="ghost"
                  onClick={() => setScheduleMode(opt.key)}
                  className={`px-5 py-3 h-auto rounded-full text-sm font-medium transition-all ${
                    scheduleMode === opt.key
                      ? 'bg-gradient-to-r from-brand-purple to-brand-purple-deep text-white shadow-md hover:from-brand-purple hover:to-brand-purple-deep hover:text-white'
                      : 'bg-white border border-slate-200 text-slate-600 hover:bg-slate-50'
                  }`}
                >
                  {opt.label}
                </Button>
              ))}
            </div>

            {scheduleMode === 'scheduled' && (
              <div className="mb-6 space-y-4">
                {/* Date */}
                <div>
                  <label className="text-xs font-medium text-slate-600 mb-2 block">날짜</label>
                  <Input
                    type="date"
                    value={scheduleDate}
                    onChange={e => setScheduleDate(e.target.value)}
                    className="w-full px-4 py-3 h-auto rounded-xl border-slate-200 text-sm text-slate-700 focus-visible:border-brand-purple-vivid appearance-none"
                  />
                </div>

                {/* Custom Time Picker */}
                <div>
                  <label className="text-xs font-medium text-slate-600 mb-2 block">시간</label>
                  <div className="flex items-center gap-3">
                    {/* Hour */}
                    <div className="flex items-center gap-1">
                      <Button
                        variant="outline"
                        size="icon-sm"
                        onClick={() => setScheduleHour(h => h <= 1 ? 12 : h - 1)}
                        className="w-8 h-8 rounded-lg bg-slate-50 border-slate-200 text-slate-500 hover:bg-slate-100"
                      >
                        <svg width="12" height="12" viewBox="0 0 12 12" fill="none"><path d="M2 6h8M6 2l-4 4 4 4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" /></svg>
                      </Button>
                      <div className="w-12 h-10 rounded-xl bg-brand-tint-purple border border-brand-tint-lavender flex items-center justify-center text-lg font-semibold text-brand-navy">
                        {String(scheduleHour).padStart(2, '0')}
                      </div>
                      <Button
                        variant="outline"
                        size="icon-sm"
                        onClick={() => setScheduleHour(h => h >= 12 ? 1 : h + 1)}
                        className="w-8 h-8 rounded-lg bg-slate-50 border-slate-200 text-slate-500 hover:bg-slate-100"
                      >
                        <svg width="12" height="12" viewBox="0 0 12 12" fill="none"><path d="M10 6H2M6 10l4-4-4-4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" /></svg>
                      </Button>
                    </div>

                    <span className="text-xl font-bold text-slate-300">:</span>

                    {/* Minute */}
                    <div className="flex items-center gap-1">
                      <Button
                        variant="outline"
                        size="icon-sm"
                        onClick={() => setScheduleMinute(m => m <= 0 ? 55 : m - 5)}
                        className="w-8 h-8 rounded-lg bg-slate-50 border-slate-200 text-slate-500 hover:bg-slate-100"
                      >
                        <svg width="12" height="12" viewBox="0 0 12 12" fill="none"><path d="M2 6h8M6 2l-4 4 4 4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" /></svg>
                      </Button>
                      <div className="w-12 h-10 rounded-xl bg-brand-tint-purple border border-brand-tint-lavender flex items-center justify-center text-lg font-semibold text-brand-navy">
                        {String(scheduleMinute).padStart(2, '0')}
                      </div>
                      <Button
                        variant="outline"
                        size="icon-sm"
                        onClick={() => setScheduleMinute(m => m >= 55 ? 0 : m + 5)}
                        className="w-8 h-8 rounded-lg bg-slate-50 border-slate-200 text-slate-500 hover:bg-slate-100"
                      >
                        <svg width="12" height="12" viewBox="0 0 12 12" fill="none"><path d="M10 6H2M6 10l4-4-4-4" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" /></svg>
                      </Button>
                    </div>

                    {/* AM/PM */}
                    <div className="flex rounded-xl overflow-hidden border border-slate-200">
                      {(['AM', 'PM'] as const).map(p => (
                        <Button
                          key={p}
                          variant="ghost"
                          onClick={() => setSchedulePeriod(p)}
                          className={`px-4 py-2 h-auto rounded-none text-sm font-medium transition-all ${
                            schedulePeriod === p
                              ? 'bg-gradient-to-r from-brand-purple to-brand-purple-deep text-white hover:from-brand-purple hover:to-brand-purple-deep hover:text-white'
                              : 'bg-white text-slate-500 hover:bg-slate-50'
                          }`}
                        >
                          {p}
                        </Button>
                      ))}
                    </div>
                  </div>
                </div>
              </div>
            )}

            {/* Publish Button */}
            {!allPublished ? (
              <Button
                onClick={handlePublish}
                disabled={selectedChannels.length === 0 || isPublishing}
                className="w-full h-auto flex items-center justify-center gap-2 py-4 rounded-full bg-gradient-to-r from-brand-purple to-brand-purple-deep text-white text-sm font-medium shadow-md hover:shadow-lg transition-all disabled:opacity-40 disabled:cursor-not-allowed"
              >
                {isPublishing ? (
                  <>
                    <div className="w-4 h-4 border-2 border-white border-t-transparent rounded-full animate-spin" />
                    배포 중... ({selectedChannels.filter(c => c.status === 'published').length}/{selectedChannels.length})
                  </>
                ) : (
                  <>
                    <ShareFilled size={18} className="text-white" />
                    {selectedChannels.length}개 채널에 {scheduleMode === 'now' ? '즉시 배포' : '예약 배포'}
                  </>
                )}
              </Button>
            ) : (
              <motion.div
                initial={{ opacity: 0, y: 10 }}
                animate={{ opacity: 1, y: 0 }}
                className="w-full py-6 rounded-2xl bg-brand-tint-purple border border-brand-tint-lavender text-center"
              >
                <div className="w-12 h-12 rounded-full bg-brand-purple-vivid flex items-center justify-center mx-auto mb-3">
                  <svg width="20" height="20" viewBox="0 0 14 14" fill="none">
                    <path d="M2 7L5.5 10.5L12 3.5" stroke="white" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" />
                  </svg>
                </div>
                <p className="text-lg font-semibold text-brand-navy mb-1">배포 완료</p>
                <p className="text-sm text-brand-purple-muted">
                  {selectedChannels.length}개 채널에 성공적으로 배포되었습니다
                </p>
              </motion.div>
            )}
          </div>
        </div>
      </div>
    </div>
  );
}
