'use client'

import { useState, useEffect } from 'react'
import { useParams } from 'next/navigation'
import { useLocale } from 'next-intl'
import { useAccount, useSignMessage } from 'wagmi'
import type { TrumpPost, BotPerformance, Candle } from '@/types'
import { useDashboardStore } from '@/store/dashboard'
import { usePriceSocket } from '@/lib/useRealtimeData'
import { getPerformance, getPrices, getUserPublic } from '@/lib/api'
import { getCachedViewEnvelope, getOrCreateViewEnvelope } from '@/lib/signedRequest'
import ChartPanel from '@/components/dashboard/ChartPanel'
import PostRow, { SignalPill, SourceIcon, fmtPct, timeAgo, TimeAgo, LocalDateTime } from '@/components/dashboard/PostCards'
import SignalMonitor from '@/components/dashboard/SignalMonitor'
import OpenPositions from '@/components/positions/OpenPositions'

interface Props {
  initialPosts: TrumpPost[]
}

// ── Inline post detail panel shown in the right rail ──────────────────────────
function PostDetail({ post, onClose }: { post: TrumpPost; onClose: () => void }) {
  const impact = post.price_impact

  function fmtImpactPct(v: number | null | undefined) {
    if (v == null || isNaN(v)) return '—'
    const s = Math.abs(v).toFixed(2) + '%'
    return v >= 0 ? '+' + s : '-' + s
  }

  return (
    <div className="card" style={{ padding: 20 }}>
      {/* header */}
      <div className="row between" style={{ marginBottom: 14 }}>
        <span className="tiny">Signal detail</span>
        <button
          className="icon-btn"
          onClick={onClose}
          style={{ width: 26, height: 26, borderRadius: '50%' }}
          title="Close"
        >
          <svg width="10" height="10" viewBox="0 0 24 24">
            <path d="M18 6L6 18M6 6l12 12" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round"/>
          </svg>
        </button>
      </div>

      {/* source + time */}
      <div className="row gap-s" style={{ marginBottom: 12 }}>
        <SourceIcon source={post.source} />
        <div>
          <div style={{ fontSize: 13, fontWeight: 500, fontFamily: 'var(--mono)' }}>@realDonaldTrump</div>
          <div style={{ fontSize: 11, color: 'var(--ink-3)' }}><TimeAgo iso={post.published_at} suffix=" ago" /> · <LocalDateTime iso={post.published_at} /></div>
        </div>
      </div>

      {/* post text */}
      <p style={{ fontSize: 14, lineHeight: 1.55, margin: '0 0 16px', color: 'var(--ink)' }}>{post.text}</p>

      {/* signal + sentiment */}
      <div className="row gap-s" style={{ marginBottom: 16 }}>
        <SignalPill signal={post.signal} />
        <span className={`chip ${post.sentiment === 'bullish' ? 'up' : post.sentiment === 'bearish' ? 'down' : 'neutral'}`}>
          {post.sentiment}
        </span>
      </div>

      {/* AI confidence */}
      <div className="ai-metric-head">
        <span>AI confidence</span>
        <strong>{post.ai_confidence}%</strong>
      </div>
      <div className="confidence-bar" style={{ marginBottom: 16 }}>
        <div style={{ width: post.ai_confidence + '%' }} />
      </div>

      {/* AI reasoning */}
      {post.ai_reasoning && (
        <>
          <div className="ai-reasoning-label">AI reasoning</div>
          <div className="ai-reasoning-card scroll" style={{ marginBottom: 16 }}>
            {post.ai_reasoning}
          </div>
        </>
      )}

      {/* Price impact grid */}
      {impact && (
        <>
          <div className="tiny" style={{ marginBottom: 10 }}>Price impact · {impact.asset}</div>
          <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr 1fr', gap: 8 }}>
            {([['m5', '5m'], ['m15', '15m'], ['m1h', '1h']] as const).map(([key, label]) => {
              const v = impact[key]
              const correct = impact[`correct_${key}` as 'correct_m5' | 'correct_m15' | 'correct_m1h']
              return (
                <div key={key} style={{
                  padding: 10,
                  background: 'var(--bg-sunk)',
                  borderRadius: 'var(--r-sm)',
                  border: '1px solid var(--line)',
                  textAlign: 'center',
                }}>
                  <div style={{ fontSize: 10, color: 'var(--ink-3)', marginBottom: 4 }}>{label}</div>
                  <div className={`delta ${(v ?? 0) >= 0 ? 'up' : 'down'}`} style={{ fontSize: 14, fontWeight: 600 }}>
                    {fmtImpactPct(v)}
                  </div>
                  {correct != null && (
                    <div style={{ fontSize: 10, marginTop: 4, color: correct ? 'var(--up)' : 'var(--down)' }}>
                      {correct ? '✓' : '✗'}
                    </div>
                  )}
                </div>
              )
            })}
          </div>
        </>
      )}
    </div>
  )
}

// ── Empty state for when nothing is selected ──────────────────────────────────
function SelectHint() {
  return (
    <div className="card" style={{ padding: 24, textAlign: 'center', color: 'var(--ink-3)' }}>
      <svg width="32" height="32" viewBox="0 0 24 24" fill="none" style={{ margin: '0 auto 12px', display: 'block', opacity: 0.4 }}>
        <circle cx="12" cy="12" r="3" stroke="currentColor" strokeWidth="2"/>
        <path d="M12 2v3M12 19v3M2 12h3M19 12h3" stroke="currentColor" strokeWidth="2" strokeLinecap="round"/>
      </svg>
      <p style={{ fontSize: 13, margin: 0, lineHeight: 1.5 }}>
        Click any marker on the chart or a post below to see details
      </p>
    </div>
  )
}

// ── Main dashboard ─────────────────────────────────────────────────────────────
export default function DashboardClient({ initialPosts }: Props) {
  const intlLocale = useLocale()
  const isZh = false  // i18n shelved — Chinese branches kept as dead code for future revival; see messages/zh.json
  const { asset, setAsset, timeframe, setTimeframe: _setTimeframe, setLivePrice, setSubscribed, setBotReadiness, setHlApiKeySet, isSubscribed, hlApiKeySet, botReadiness, livePrices } = useDashboardStore()
  function setTimeframe(tf: string) { _setTimeframe(tf as '5m' | '15m' | '1H' | '4H' | '1D' | '1W') }
  const { address, isConnected } = useAccount()
  const { signMessageAsync } = useSignMessage()
  const params = useParams()
  const locale = (typeof params?.locale === 'string' ? params.locale : 'en')
  const [posts, setPosts] = useState<TrumpPost[]>(initialPosts)
  const [performance, setPerformance] = useState<BotPerformance | undefined>(undefined)
  const [candles, setCandles] = useState<Candle[]>([])
  const [chartErr, setChartErr] = useState('')
  const [chartReload, setChartReload] = useState(0)
  const [selectedPostId, setSelectedPostId] = useState<number | null>(null)
  // For 1D: show all posts from selected day
  const [selectedDayPosts, setSelectedDayPosts] = useState<TrumpPost[] | null>(null)

  useEffect(() => {
    if (!isConnected || !address) {
      setSubscribed(false)
      setHlApiKeySet(false)
      setBotReadiness('unknown')
      setPerformance(undefined)
      return
    }
    // Clear account-scoped bot state immediately when the connected wallet
    // changes so a previous wallet's status never leaks into the next one.
    setSubscribed(false)
    setHlApiKeySet(false)
    setBotReadiness('unknown')
    getUserPublic(address.toLowerCase())
      .then((user) => {
        setSubscribed(user.active)
        setHlApiKeySet(user.hl_api_key_set)
        setBotReadiness(user.hl_api_key_set ? 'saved' : 'unknown')
      })
      .catch(() => {})
  }, [address, isConnected, setSubscribed, setHlApiKeySet, setBotReadiness])

  useEffect(() => {
    if (!isConnected || !address) {
      setPerformance(undefined)
      return
    }
    let cancelled = false
    ;(async () => {
      try {
        const env = getCachedViewEnvelope('view_performance', address)
          ?? await getOrCreateViewEnvelope({ action: 'view_performance', wallet: address, signMessageAsync })
        const data = await getPerformance(address, env)
        if (!cancelled) setPerformance(data)
      } catch {
        if (!cancelled) setPerformance(undefined)
      }
    })()
    return () => { cancelled = true }
  }, [address, isConnected, signMessageAsync])

  usePriceSocket({
    onPrice: (a, price) => setLivePrice(a, price),
    onNewPost: (post) => setPosts((prev) => [post as TrumpPost, ...prev].slice(0, 500)),
  })

  useEffect(() => {
    setCandles([])
    setChartErr('')
    getPrices(asset, timeframe)
      .then(c => { setCandles(c); setChartErr('') })
      .catch(e => setChartErr(e instanceof Error ? e.message : (isZh ? '价格数据加载失败' : 'Failed to load price data')))
  }, [asset, timeframe, chartReload, isZh])

  const selectedPost = posts.find(p => p.id === selectedPostId) ?? null

  // Pinned BTC bottom-reversal alert: the rarest, highest-conviction signal.
  // Surface the most recent btc_bottom_reversal post fired in the last 21
  // days right at the top of the overview so it's never missed.
  const btcReversalAlert = (() => {
    const cutoff = Date.now() - 21 * 24 * 3600 * 1000
    const hits = posts
      .filter(p => (p.source || '') === 'btc_bottom_reversal'
        && new Date(p.published_at).getTime() >= cutoff)
      .sort((a, b) => new Date(b.published_at).getTime() - new Date(a.published_at).getTime())
    return hits[0] ?? null
  })()

  // Show actionable signals first (buy/short), then most recent hold/neutral.
  // Cap at 8 total so the list doesn't get too long.
  const actionable = posts.filter(p => p.signal === 'buy' || p.signal === 'short').slice(0, 4)
  const recentOthers = posts.filter(p => p.signal !== 'buy' && p.signal !== 'short').slice(0, 4)
  const recentPosts = [...actionable, ...recentOthers].slice(0, 8)

  const lastCandle = candles[candles.length - 1]
  // Live price beats the most recent candle close — the candle is only
  // refreshed when the user changes asset/timeframe, so without WS the number
  // is frozen at page load.
  const livePrice = livePrices[asset]
  const displayPrice = livePrice ?? lastCandle?.close ?? null

  // 24-hour change. Picking by candle index is wrong (200×4H = 33 days).
  // Find the candle whose `time` is closest to (now − 24h) and use its open.
  const now = lastCandle ? lastCandle.time : Math.floor(Date.now() / 1000)
  const target24h = now - 24 * 3600
  let baseline24h: typeof lastCandle | undefined
  if (candles.length) {
    baseline24h = candles[0]
    for (const c of candles) {
      if (c.time <= target24h) baseline24h = c
      else break
    }
  }
  const priceChange =
    displayPrice != null && baseline24h
      ? ((displayPrice - baseline24h.open) / baseline24h.open) * 100
      : 0

  const totalPosts = posts.length
  const todayKey = new Date().toISOString().slice(0, 10)
  const signalsToday = posts.filter(p => p.published_at?.slice(0, 10) === todayKey).length
  const actionablePosts = posts.filter(p => p.signal === 'buy' || p.signal === 'short').length
  const winRate = performance?.win_rate ?? 0
  const netPnl = performance?.net_pnl_usd ?? 0
  const hasPriceData = candles.length > 0
  const hasPerformanceData = Boolean(performance)

  return (
    <div className="page wide">
      <div className="page-head">
        <div>
          <h1 className="page-title">{isZh ? '信号总览' : 'Signal monitor'}</h1>
          <p className="page-sub">
            {`${actionablePosts} actionable signals · Auto-trader ${botReadiness === 'ready' ? 'ready' : hlApiKeySet ? 'saved' : isSubscribed ? 'subscribed' : 'standby'} · ${hasPriceData ? 'Live market context' : 'Waiting for market data'}`}
          </p>
        </div>
        <div className="row gap-s">
          <span className="chip"><span className="live-dot" />Live feed</span>
          <span className="chip">{`${totalPosts} posts tracked`}</span>
        </div>
      </div>

      {/* Pinned BTC bottom-reversal alert — the rarest / highest-conviction
          signal. Always sits ABOVE everything so it's never missed. */}
      {btcReversalAlert && (
        <a
          href={`/${locale}/btc`}
          style={{
            display: 'block', textDecoration: 'none',
            border: '1px solid color-mix(in oklab, var(--up) 45%, var(--line))',
            background: 'var(--up-soft, rgba(22,163,74,0.10))',
            borderRadius: 12, padding: '14px 18px', marginBottom: 16,
          }}
        >
          <div style={{ display: 'flex', alignItems: 'center', gap: 10, flexWrap: 'wrap' }}>
            <span style={{ fontSize: 12, fontWeight: 800, letterSpacing: '.04em',
                           color: 'var(--up)', textTransform: 'uppercase' }}>
              ⚡ BTC bottom-reversal signal
            </span>
            <span style={{ fontSize: 11, fontWeight: 700, padding: '2px 8px',
                           borderRadius: 999, background: 'var(--up)', color: '#fff' }}>
              conf {Math.round(btcReversalAlert.ai_confidence)}
            </span>
            <span style={{ fontSize: 11, color: 'var(--ink-3)' }}>
              {timeAgo(btcReversalAlert.published_at)}
            </span>
            <span style={{ marginLeft: 'auto', fontSize: 12, fontWeight: 700,
                           color: 'var(--up)' }}>
              Open BTC signal →
            </span>
          </div>
          <div style={{ fontSize: 13, color: 'var(--ink-2)', marginTop: 6,
                        lineHeight: 1.45, overflow: 'hidden', display: '-webkit-box',
                        WebkitLineClamp: 2, WebkitBoxOrient: 'vertical' }}>
            {btcReversalAlert.text}
          </div>
        </a>
      )}

      {/* Open positions — what's on the book right now. Renders only when
          a subscribed wallet is connected, so guests see the normal feed. */}
      <OpenPositions />

      {/* KPI Row */}
      <div className="kpi-row">
        <div className="kpi">
          <div className="label"><span className="asset-dot btc" style={{ width: 10, height: 10 }} /> BTC</div>
          <div className="value">{displayPrice != null ? '$' + Math.round(displayPrice).toLocaleString() : '—'}</div>
          <div className="foot">
            <span className={`delta ${priceChange >= 0 ? 'up' : 'down'}`}>{hasPriceData ? fmtPct(priceChange) : 'Feed pending'}</span>
            <span>24h</span>
          </div>
        </div>
        <div className="kpi">
          <div className="label">Signals today</div>
          <div className="value">{signalsToday}</div>
          <div className="foot"><span>{`${actionablePosts} actionable total`}</span></div>
        </div>
        <div className="kpi accent">
          <div className="label">30d Net P&L</div>
          <div className="value">{netPnl >= 0 ? '+$' : '-$'}{Math.abs(netPnl).toLocaleString('en-US', { maximumFractionDigits: 0 })}</div>
          <div className="foot"><span>{hasPerformanceData ? 'Bot performance' : 'Performance pending'}</span></div>
        </div>
        <div className="kpi">
          <div className="label">Win rate</div>
          <div className="value">{performance ? (winRate * 100).toFixed(1) + '%' : '—'}</div>
          <div className="foot"><span>{hasPerformanceData ? `${performance?.total_trades ?? 0} trades` : 'Connect wallet to load your trade history'}</span></div>
        </div>
      </div>

      <div className="dash-grid">
        {/* Left: Chart + signal stream */}
        <div className="stack gap-l">
          <div className="card" style={{ padding: 24 }}>
            <div className="row between" style={{ marginBottom: 18, alignItems: 'flex-start' }}>
              <div>
                <div className="tiny">Price · {asset}</div>
                <div className="row gap-m" style={{ marginTop: 6 }}>
                  <div className="hero-value mono" style={{ fontSize: 32 }}>
                    {displayPrice != null ? '$' + Math.round(displayPrice).toLocaleString() : '—'}
                  </div>
                  <span className={`chip ${priceChange >= 0 ? 'up' : 'down'}`}>{hasPriceData ? fmtPct(priceChange) : 'Feed pending'} · 24h</span>
                </div>
              </div>
              <div className="stack gap-s" style={{ alignItems: 'flex-end' }}>
                <div className="asset-switch">
                  <button className={asset === 'BTC' ? 'on' : ''} onClick={() => setAsset('BTC')}>
                    <span className="asset-dot btc" /> BTC
                  </button>
                  <button className={asset === 'ETH' ? 'on' : ''} onClick={() => setAsset('ETH')}>
                    <span className="asset-dot eth" /> ETH
                  </button>
                </div>
                <div className="tf-bar">
                  {(['5m', '15m', '1H', '4H', '1D'] as const).map(t => (
                    <button key={t} className={timeframe === t ? 'on' : ''} onClick={() => setTimeframe(t)}>{t}</button>
                  ))}
                </div>
              </div>
            </div>

            {chartErr && (
              <div style={{ padding: '8px 12px', margin: '0 0 8px', fontSize: 12,
                            color: 'var(--down)', background: 'var(--down-soft, rgba(220,38,38,.08))',
                            borderRadius: 8 }}>
                ⚠️ {asset} {timeframe} chart failed to load — {chartErr}{' '}
                <button className="btn ghost" style={{ fontSize: 11, padding: '3px 10px', marginLeft: 6 }}
                  onClick={() => setChartReload(n => n + 1)}>Retry</button>
              </div>
            )}
            <div className="chart-wrap">
              <ChartPanel
                posts={posts}
                candles={candles}
                externalSelectedId={selectedPostId}
                onSelectPost={(id) => {
                  setSelectedDayPosts(null)
                  setSelectedPostId(id)
                }}
                onSelectDayPosts={(dayPosts) => {
                  setSelectedDayPosts(dayPosts)
                  setSelectedPostId(null)
                }}
              />
            </div>

            <div className="chart-footnote">
              <div className="item"><span className="legend-dot" style={{ background: '#26a69a' }} /> Buy signal</div>
              <div className="item"><span className="legend-dot" style={{ background: '#ef5350' }} /> Short signal</div>
              <div className="item"><span className="legend-dot" style={{ background: '#aaaaaa' }} /> Hold / filtered</div>
              <div style={{ marginLeft: 'auto' }}>Click marker to see details →</div>
            </div>
          </div>

          {/* Recent signals list */}
          <div>
            <div className="section-title">
              <h2>Recent signals</h2>
              <span className="hint">
                {actionable.length > 0 ? `${actionable.length} actionable · ` : ''}
                {`${totalPosts} tracked`}
              </span>
            </div>
            <div className="post-stream">
              {recentPosts.map(p => (
                <PostRow key={p.id} post={p} />
              ))}
            </div>
          </div>
        </div>

        {/* Right rail */}
        <div className="rail">
          {/* Day-view: all posts from clicked day */}
          {selectedDayPosts ? (
            <div className="card" style={{ padding: 20 }}>
              <div className="row between" style={{ marginBottom: 14 }}>
                <div>
                  <div className="tiny">{selectedDayPosts.length} posts · this candle</div>
                  <div style={{ fontSize: 15, fontWeight: 600, marginTop: 2 }}>
                    <LocalDateTime iso={selectedDayPosts[0].published_at} opts={{ month:'short', day:'numeric', hour:'2-digit', minute:'2-digit' }} />
                  </div>
                </div>
                <button className="icon-btn" onClick={() => { setSelectedDayPosts(null); setSelectedPostId(null) }}
                  style={{ width:26, height:26, borderRadius:'50%' }}>
                  <svg width="10" height="10" viewBox="0 0 24 24">
                    <path d="M18 6L6 18M6 6l12 12" stroke="currentColor" strokeWidth="2.5" strokeLinecap="round"/>
                  </svg>
                </button>
              </div>
              <div style={{ display:'flex', flexDirection:'column', gap:10 }}>
                {selectedDayPosts.map(p => {
                  const expanded = selectedPostId === p.id
                  const impact = p.price_impact
                  function fmtImpactPct(v: number | null | undefined) {
                    if (v == null || isNaN(v)) return '—'
                    const s = Math.abs(v).toFixed(2) + '%'
                    return v >= 0 ? '+' + s : '-' + s
                  }
                  return (
                    <div key={p.id}
                      style={{ border:`1px solid ${expanded?'var(--amber)':'var(--line)'}`,
                        borderRadius:'var(--r-sm)', overflow:'hidden', transition:'border-color 0.15s' }}>
                      {/* collapsed row — always visible */}
                      <div onClick={() => setSelectedPostId(expanded ? null : p.id)}
                        style={{ padding:12, cursor:'pointer',
                          background: expanded ? 'var(--bg-sunk)' : 'transparent' }}>
                        <div className="row between" style={{ marginBottom:6 }}>
                          <div className="row gap-s">
                            <SignalPill signal={p.signal} />
                            <span className={`chip ${p.sentiment === 'bullish' ? 'up' : p.sentiment === 'bearish' ? 'down' : 'neutral'}`}
                              style={{ fontSize:10 }}>{p.sentiment}</span>
                          </div>
                          <span style={{ fontSize:11, color:'var(--ink-3)' }}><TimeAgo iso={p.published_at} /></span>
                        </div>
                        <p style={{ fontSize:12, lineHeight:1.5, margin:'0 0 8px', color:'var(--ink-2)',
                          ...(expanded ? {} : {
                            display:'-webkit-box', WebkitLineClamp: 3,
                            WebkitBoxOrient:'vertical', overflow:'hidden'
                          }) }}>
                          {p.text}
                        </p>
                        <div style={{ display:'flex', gap:6, alignItems:'center' }}>
                          <div style={{ flex:1, height:3, background:'var(--line)', borderRadius:2, overflow:'hidden' }}>
                            <div style={{ width:p.ai_confidence+'%', height:'100%', background:'var(--amber)', borderRadius:2 }} />
                          </div>
                          <span style={{ fontSize:10, color:'var(--ink-3)', whiteSpace:'nowrap' }}>{p.ai_confidence}% conf</span>
                        </div>
                      </div>

                      {/* expanded detail */}
                      {expanded && (
                        <div style={{ padding:'0 12px 12px', borderTop:'1px solid var(--line)' }}>
                          {p.ai_reasoning && (
                            <>
                              <div className="ai-reasoning-label" style={{ margin:'10px 0 8px' }}>AI reasoning</div>
                              <div className="ai-reasoning-card" style={{ padding: '14px 15px', fontSize: 14, lineHeight: 1.7 }}>
                                {p.ai_reasoning}
                              </div>
                            </>
                          )}
                          {impact && (
                            <>
                              <div className="tiny" style={{ margin:'10px 0 6px' }}>Price impact · {impact.asset}</div>
                              <div style={{ display:'grid', gridTemplateColumns:'1fr 1fr 1fr', gap:6 }}>
                                {(['m5','m15','m1h'] as const).map((key) => {
                                  const label = key === 'm5' ? '5m' : key === 'm15' ? '15m' : '1h'
                                  const v = impact[key]
                                  const correct = impact[`correct_${key}` as 'correct_m5'|'correct_m15'|'correct_m1h']
                                  return (
                                    <div key={key} style={{ padding:8, background:'var(--bg-sunk)',
                                      borderRadius:'var(--r-sm)', border:'1px solid var(--line)', textAlign:'center' }}>
                                      <div style={{ fontSize:10, color:'var(--ink-3)', marginBottom:3 }}>{label}</div>
                                      <div className={`delta ${(v??0)>=0?'up':'down'}`} style={{ fontSize:13, fontWeight:600 }}>
                                        {fmtImpactPct(v)}
                                      </div>
                                      {correct != null && (
                                        <div style={{ fontSize:10, marginTop:3, color: correct ? 'var(--up)' : 'var(--down)' }}>
                                          {correct ? '✓' : '✗'}
                                        </div>
                                      )}
                                    </div>
                                  )
                                })}
                              </div>
                            </>
                          )}
                        </div>
                      )}
                    </div>
                  )
                })}
              </div>
            </div>
          ) : selectedPost ? (
            <PostDetail post={selectedPost} onClose={() => setSelectedPostId(null)} />
          ) : (
            <SelectHint />
          )}

          {/* Breakout signal monitor */}
          <SignalMonitor />
        </div>
      </div>
    </div>
  )
}