'use client';

import { useEffect, useState } from 'react';
import { useAuth } from '@/contexts/AuthContext';
import { Skeleton, SkeletonList } from '@/components/vyndr';

/**
 * /desk (Session 63 / A1-S4c) — the founder's daily copy-paste arsenal.
 * Auth: gated route + backend email allowlist (DESK_OWNERS). Everything on
 * this page is assembled from the pipeline by the VOICE v1.1 template
 * engine; per-tweet copy buttons + character counts; the DATA BRIEF block
 * pastes into claude.ai for freeform writing. Nothing auto-posts.
 */

interface Variant { label: string; text: string; tweets: string[] }
interface DeskPack {
  generated_at: string | null;
  formats: {
    morning_wire?: Variant[];
    signals?: Variant[][];
    streak_watch?: Variant[];
    settle?: Variant[];
    receipts?: Variant[][];
    archetype_watch?: Variant[];
    line_dispatches?: Variant[][];
  };
  data_brief?: unknown;
  error?: string;
}

function CopyBtn({ text, label = 'COPY' }: { text: string; label?: string }) {
  const [done, setDone] = useState(false);
  return (
    <button
      onClick={() => {
        void navigator.clipboard.writeText(text).then(() => {
          setDone(true);
          setTimeout(() => setDone(false), 1200);
        });
      }}
      className="mono"
      style={{ cursor: 'pointer', background: done ? 'var(--g-a)' : 'transparent', color: done ? '#06060B' : 'var(--text-1)', border: '1px solid var(--border-hi)', borderRadius: 6, padding: '4px 10px', fontSize: 10, fontWeight: 700, letterSpacing: '0.06em' }}
    >
      {done ? 'COPIED' : label}
    </button>
  );
}

function VariantBlock({ v }: { v: Variant }) {
  return (
    <div style={{ marginBottom: 12 }}>
      <div style={{ display: 'flex', alignItems: 'center', gap: 8, marginBottom: 6 }}>
        <span className="lbl">{v.label.toUpperCase()}</span>
        <CopyBtn text={v.text} label="COPY ALL" />
      </div>
      {v.tweets.map((t, i) => (
        <div key={i} style={{ display: 'flex', gap: 10, alignItems: 'flex-start', padding: '8px 10px', background: 'var(--bg-2)', border: '1px solid var(--border)', borderRadius: 8, marginBottom: 6 }}>
          <pre className="mono" style={{ margin: 0, flex: 1, whiteSpace: 'pre-wrap', fontSize: 12.5, lineHeight: 1.55, color: 'var(--text-0)' }}>{t}</pre>
          <div style={{ display: 'flex', flexDirection: 'column', gap: 4, alignItems: 'flex-end', flexShrink: 0 }}>
            <CopyBtn text={t} />
            <span className="mono" style={{ fontSize: 9.5, color: t.length > 280 ? 'var(--miss)' : 'var(--text-2)' }}>{t.length}/280</span>
          </div>
        </div>
      ))}
    </div>
  );
}

function FormatCard({ title, variants }: { title: string; variants?: Variant[] }) {
  if (!variants || variants.length === 0) return null;
  return (
    <section style={{ background: 'var(--bg-1)', border: '1px solid var(--border)', borderRadius: 10, padding: 16, marginBottom: 16 }}>
      <div className="mono" style={{ fontSize: 11, fontWeight: 800, letterSpacing: '0.14em', color: 'var(--g-a)', marginBottom: 12 }}>{title}</div>
      {variants.map((v, i) => <VariantBlock key={i} v={v} />)}
    </section>
  );
}

export default function DeskPage() {
  const { session } = useAuth();
  const [pack, setPack] = useState<DeskPack | null>(null);
  const [status, setStatus] = useState<'loading' | 'denied' | 'ready' | 'error'>('loading');

  useEffect(() => {
    const token = session?.access_token;
    if (!token) return;
    let active = true;
    fetch('/api/desk/pack', { headers: { Authorization: `Bearer ${token}` } })
      .then(async (r) => {
        if (!active) return;
        if (r.status === 403 || r.status === 401) { setStatus('denied'); return; }
        const data = (await r.json()) as DeskPack;
        setPack(data);
        setStatus(data && data.formats ? 'ready' : 'error');
      })
      .catch(() => { if (active) setStatus('error'); });
    return () => { active = false; };
  }, [session]);

  if (status === 'denied') {
    return (
      <section style={{ maxWidth: 640, margin: '0 auto', padding: '48px 16px' }}>
        <p className="mono" style={{ color: 'var(--text-1)', fontSize: 13 }}>The desk is the publisher&rsquo;s surface. DESK_OWNERS grants access.</p>
      </section>
    );
  }
  if (status === 'loading') {
    // DS1 (§4) — the pack is assembling; layout-matched skeleton, not a text
    // wall. Mirrors the header + stack of FormatCards below.
    return (
      <section style={{ maxWidth: 860, margin: '0 auto', padding: '28px 16px 120px' }} aria-busy="true">
        <Skeleton height={14} width={90} radius={4} style={{ marginBottom: 12 }} />
        <Skeleton height={30} width={260} radius={8} style={{ marginBottom: 24 }} />
        <SkeletonList count={4} height={120} />
      </section>
    );
  }
  if (status !== 'ready' || !pack) {
    return (
      <section style={{ maxWidth: 640, margin: '0 auto', padding: '48px 16px' }}>
        <p className="mono" style={{ color: 'var(--text-2)', fontSize: 13 }}>Pack unavailable. Check back after the first pipeline run.</p>
      </section>
    );
  }

  const f = pack.formats;
  return (
    <section style={{ maxWidth: 860, margin: '0 auto', padding: '28px 16px 120px' }}>
      <header style={{ marginBottom: 20 }}>
        <div className="mono" style={{ fontSize: 11, color: 'var(--g-a)', letterSpacing: '0.12em', marginBottom: 8 }}>THE DESK</div>
        <h1 className="mono" style={{ margin: 0, fontSize: 26, fontWeight: 800 }}>Today&rsquo;s arsenal</h1>
        {pack.generated_at && (
          <p className="mono" style={{ fontSize: 11, color: 'var(--text-2)', marginTop: 6 }}>
            Assembled {new Date(pack.generated_at).toLocaleString('en-US', { timeZone: 'America/New_York' })} ET · nothing auto-posts
          </p>
        )}
      </header>

      <FormatCard title="THE MORNING WIRE" variants={f.morning_wire} />
      {(f.signals || []).map((v, i) => <FormatCard key={`sig-${i}`} title={`SIGNAL ${i + 1}`} variants={v} />)}
      <FormatCard title="STREAK WATCH" variants={f.streak_watch} />
      <FormatCard title="ARCHETYPE WATCH" variants={f.archetype_watch} />
      {(f.line_dispatches || []).map((v, i) => <FormatCard key={`ld-${i}`} title={`LINE DISPATCH ${i + 1}`} variants={v} />)}
      <FormatCard title="THE SETTLE" variants={f.settle} />
      {(f.receipts || []).map((v, i) => <FormatCard key={`rc-${i}`} title={`RECEIPT ${i + 1}`} variants={v} />)}

      {/* DATA BRIEF — paste into claude.ai for freeform Read Room threads. */}
      {pack.data_brief != null && (
        <section style={{ background: 'var(--bg-1)', border: '1px solid var(--border-hi)', borderRadius: 10, padding: 16 }}>
          <div style={{ display: 'flex', alignItems: 'center', gap: 10, marginBottom: 10 }}>
            <span className="mono" style={{ fontSize: 11, fontWeight: 800, letterSpacing: '0.14em', color: 'var(--amber)' }}>DATA BRIEF</span>
            <CopyBtn text={JSON.stringify(pack.data_brief, null, 2)} label="COPY BRIEF" />
            <span className="mono" style={{ fontSize: 10, color: 'var(--text-2)' }}>paste into claude.ai for Read Room + freeform</span>
          </div>
          <pre className="mono" style={{ margin: 0, maxHeight: 320, overflow: 'auto', fontSize: 11, lineHeight: 1.5, color: 'var(--text-1)', whiteSpace: 'pre-wrap' }}>{JSON.stringify(pack.data_brief, null, 2)}</pre>
        </section>
      )}
    </section>
  );
}