import { useRef } from 'react';
import { Flame } from 'lucide-react';
import { cn } from '@/lib/utils';
import { AmpOperate, AmpPower, AmpPowerLevel, AmpFanMode, FlexAmpOperate } from '../../wailsjs/go/main/App';

// AmpCard renders the amplifier card exactly like the one in the FlexRadio panel,
// so Station Control (and anywhere else that needs it) shows the SAME card instead
// of a stripped-down variant. It handles all three amp families:
//   • SPE Expert / ACOM — driven by OpsLog's own serial/TCP link (amp.spe/amp.acom)
//   • PowerGenius XL     — OPERATE + meters come from the Flex (which reports the
//                          amp), fan mode from the direct GSCP link (amp.pgxl)
// Controls use the multi-amp API (AmpOperate/AmpPower/… by amp id) so several amps
// can each get their own card.

const METER_SEGMENTS = 26;

function MeterBar({ label, value, unit, lo, hi, accent = '#16a34a', display, segColor, compact }: {
  label: string; value: number; unit?: string; lo: number; hi: number; accent?: string; display?: string;
  segColor?: (frac: number) => string; compact?: boolean;
}) {
  const span = hi - lo;
  const pct = span > 0 ? Math.max(0, Math.min(100, ((value - lo) / span) * 100)) : 0;
  const lit = Math.round((pct / 100) * METER_SEGMENTS);
  return (
    <div className={cn('rounded-lg border border-border/70 bg-gradient-to-b from-card to-muted/40 shadow-sm min-w-0',
      compact ? 'px-2 py-1' : 'px-2.5 py-2')}>
      <div className={cn('flex items-baseline justify-between gap-1', compact ? 'mb-1' : 'mb-1.5')}>
        <span className="text-[10px] font-bold uppercase tracking-wider text-muted-foreground truncate">{label}</span>
        <span className={cn('font-mono font-bold tabular-nums whitespace-nowrap text-foreground/90', compact ? 'text-xs' : 'text-sm')}>
          {display !== undefined ? display : (
            <>{Math.abs(value) >= 100 ? value.toFixed(0) : value.toFixed(1)}<span className="text-muted-foreground text-[10px] ml-0.5">{unit}</span></>
          )}
        </span>
      </div>
      <div className={cn('flex gap-[2px] items-stretch rounded-[3px] bg-black/10 p-[2px]', compact ? 'h-2' : 'h-3')}>
        {Array.from({ length: METER_SEGMENTS }).map((_, i) => {
          const on = i < lit;
          const frac = i / METER_SEGMENTS;
          const col = segColor ? segColor(frac) : (frac > 0.82 ? '#dc2626' : accent);
          return (
            <div key={i} className="flex-1 rounded-[2px] transition-colors duration-100"
              style={on
                ? { background: `linear-gradient(to bottom, ${col}, ${col}cc)`, boxShadow: `0 0 4px ${col}88` }
                : { background: '#cfc6ad', opacity: 0.35 }} />
          );
        })}
      </div>
    </div>
  );
}

function Card({ icon: Icon, title, accent, children }: { icon: any; title: string; accent?: string; children: React.ReactNode }) {
  return (
    <div className="rounded-xl border border-border bg-card shadow-sm overflow-hidden">
      <div className="flex items-center gap-2 px-3 py-2 border-b border-border/60 bg-muted/30">
        <Icon className="size-4" style={{ color: accent ?? 'var(--primary)' }} />
        <span className="text-xs font-bold uppercase tracking-wider text-foreground/80">{title}</span>
      </div>
      <div className="p-3 space-y-3">{children}</div>
    </div>
  );
}

// speMaxW / powerLevelLabel — same helpers the Flex panel uses.
function speMaxW(model?: string): number {
  const m = (model || '').toUpperCase();
  if (m.includes('20K') || m.includes('2K')) return 2000;
  if (m.includes('15K')) return 1500;
  return 1300;
}
function powerLevelLabel(pl?: string): string {
  switch ((pl || '').trim().toUpperCase()) {
    case 'L': return 'Low';
    case 'M': return 'Mid';
    case 'H': return 'High';
    default: return pl || '';
  }
}

type Amp = { id: string; name: string; type?: string; spe?: any; acom?: any; pgxl?: any };

export function AmpCard({ amp, flex, t }: { amp: Amp; flex: any; t: (k: string, v?: any) => string }) {
  // Peak-hold so the jittery VITA-49 meters read steadily (own ref per card).
  const peak = useRef<Record<string, { v: number; t: number }>>({});
  const peakHold = (key: string, val: number) => {
    const now = Date.now();
    const p = peak.current[key];
    if (!p || val >= p.v || now - p.t > 2000) { peak.current[key] = { v: val, t: now }; return val; }
    return p.v;
  };

  const isSPE = !!amp.spe;
  const isACOM = !!amp.acom;

  if (isSPE) {
    const spe = amp.spe;
    return (
      <Card icon={Flame} title={`${t('flxp.amplifier')} · ${amp.name || `SPE${spe.model ? ' ' + spe.model : ''}`}`} accent="#ea580c">
        <div className="flex items-center gap-3 flex-wrap">
          <button type="button" disabled={!spe.connected}
            onClick={() => AmpOperate(amp.id, !spe.operate).catch(() => {})}
            className={cn('px-4 py-2 rounded-lg text-sm font-extrabold tracking-wide border-2 transition-all disabled:opacity-30',
              spe.operate ? 'bg-warning text-warning-foreground border-warning shadow-[0_0_14px] shadow-warning/50' : 'bg-card text-warning border-warning hover:bg-warning-muted')}>
            {spe.operate ? 'OPERATE' : 'STANDBY'}
          </button>
          <div className="inline-flex rounded-lg overflow-hidden border-2 border-success/70">
            <button type="button" disabled={!spe.connected}
              onClick={() => AmpPower(amp.id, true).catch(() => {})}
              className="px-3 py-2 text-sm font-bold bg-card text-success hover:bg-success/15 disabled:opacity-30">ON</button>
            <button type="button" disabled={!spe.connected}
              onClick={() => AmpPower(amp.id, false).catch(() => {})}
              className="px-3 py-2 text-sm font-bold bg-card text-danger border-l-2 border-success/70 hover:bg-danger/15 disabled:opacity-30">OFF</button>
          </div>
          <div className="inline-flex rounded-lg overflow-hidden border border-border">
            {(['L', 'M', 'H'] as const).map((lvl, i) => {
              const active = (spe.power_level || '').trim().toUpperCase() === lvl;
              return (
                <button key={lvl} type="button" disabled={!spe.connected}
                  onClick={() => AmpPowerLevel(amp.id, lvl).catch(() => {})}
                  className={cn('px-3 py-2 text-sm font-bold disabled:opacity-30', i > 0 && 'border-l border-border',
                    active ? 'bg-primary text-primary-foreground' : 'bg-card text-muted-foreground hover:bg-muted')}>
                  {powerLevelLabel(lvl)}
                </button>
              );
            })}
          </div>
          <span className={cn('inline-flex items-center gap-1.5 text-sm', spe.connected ? 'text-muted-foreground' : 'text-danger')}>
            <span className={cn('size-2 rounded-full', spe.connected ? 'bg-success' : 'bg-danger')} />
            {spe.connected ? (spe.tx ? 'TX' : 'RX') : t('flxp.speOffline')}
          </span>
          {spe.connected && (
            <span className="text-sm font-mono text-muted-foreground tabular-nums">
              {spe.band ? `${spe.band} · ` : ''}{spe.output_w}W · SWR {Number(spe.swr_ant ?? 0).toFixed(1)} · {spe.temp_c}°C · {powerLevelLabel(spe.power_level)}
            </span>
          )}
          <div className="flex-1" />
          {(spe.warnings || spe.alarms) && (
            <span className="px-2 py-1 rounded bg-danger-muted text-danger-muted-foreground text-xs font-bold">⚠ {spe.warnings} {spe.alarms}</span>
          )}
        </div>
        {spe.connected && (
          <MeterBar label={t('flxp.outputPower')} value={Number(spe.output_w) || 0} unit="W"
            lo={0} hi={speMaxW(spe.model)}
            display={`${Number(spe.output_w) || 0} W`}
            segColor={(f) => (f > 0.9 ? '#dc2626' : f > 0.75 ? '#f59e0b' : '#ea580c')} />
        )}
      </Card>
    );
  }

  if (isACOM) {
    const acom = amp.acom;
    return (
      <Card icon={Flame} title={`${t('flxp.amplifier')} · ${amp.name || `ACOM${acom.model ? ' ' + acom.model : ''}`}`} accent="#ea580c">
        <div className="flex items-center gap-3 flex-wrap">
          <button type="button" disabled={!acom.connected}
            onClick={() => AmpOperate(amp.id, !acom.operate).catch(() => {})}
            className={cn('px-4 py-2 rounded-lg text-sm font-extrabold tracking-wide border-2 transition-all disabled:opacity-30',
              acom.operate ? 'bg-warning text-warning-foreground border-warning shadow-[0_0_14px] shadow-warning/50' : 'bg-card text-warning border-warning hover:bg-warning-muted')}>
            {acom.operate ? 'OPERATE' : 'STANDBY'}
          </button>
          <div className="inline-flex rounded-lg overflow-hidden border-2 border-success/70">
            <button type="button" disabled={!(acom.port_open && acom.transport === 'serial')}
              onClick={() => AmpPower(amp.id, true).catch(() => {})}
              title={acom.transport === 'serial' ? 'Power on (DTR/RTS pulse — needs the power-on pins wired)' : 'Power-on needs the serial DTR/RTS lines — not available over a network bridge'}
              className="px-3 py-2 text-sm font-bold bg-card text-success hover:bg-success/15 disabled:opacity-30">ON</button>
            <button type="button" disabled={!acom.connected}
              onClick={() => AmpPower(amp.id, false).catch(() => {})}
              className="px-3 py-2 text-sm font-bold bg-card text-danger border-l-2 border-success/70 hover:bg-danger/15 disabled:opacity-30">OFF</button>
          </div>
          <span className={cn('inline-flex items-center gap-1.5 text-sm', acom.connected ? 'text-muted-foreground' : 'text-danger')}>
            <span className={cn('size-2 rounded-full', acom.connected ? 'bg-success' : 'bg-danger')} />
            {acom.connected ? acom.state : t('flxp.acomOffline')}
          </span>
          {acom.connected && (
            <span className="text-sm font-mono text-muted-foreground tabular-nums">
              {acom.band ? `${acom.band} · ` : ''}{acom.fwd_w}W · SWR {Number(acom.swr ?? 0).toFixed(1)} · {acom.temp_c}°C · Fan {acom.fan}
            </span>
          )}
          <div className="flex-1" />
          {acom.err_text && (
            <span className="px-2 py-1 rounded bg-danger-muted text-danger-muted-foreground text-xs font-bold">⚠ {acom.err_text}</span>
          )}
        </div>
        {acom.connected && (
          <MeterBar label={t('flxp.outputPower')} value={Number(acom.fwd_w) || 0} unit="W"
            lo={0} hi={Number(acom.max_w) || 800}
            display={`${Number(acom.fwd_w) || 0} W`}
            segColor={(f) => (f > 0.9 ? '#dc2626' : f > 0.75 ? '#f59e0b' : '#ea580c')} />
        )}
      </Card>
    );
  }

  // PowerGenius XL — OPERATE + meters ride on the Flex; fan mode on the GSCP link.
  const pg = amp.pgxl || {};
  const viaFlex = !!flex?.amp_available;
  const operate = viaFlex ? !!flex?.amp_operate : !!pg.operate;
  const connected = !!pg.connected || viaFlex;
  const fault = flex?.amp_fault;
  return (
    <Card icon={Flame} title={`${t('flxp.amplifier')}${flex?.amp_model ? ' · ' + flex.amp_model : (pg.model ? ' · ' + pg.model : '')} · ${amp.name}`} accent="#ea580c">
      <div className="flex items-center gap-3 flex-wrap">
        <button type="button" disabled={!connected}
          onClick={() => (viaFlex ? FlexAmpOperate(!operate) : AmpOperate(amp.id, !operate)).catch(() => {})}
          className={cn('px-4 py-2 rounded-lg text-sm font-extrabold tracking-wide border-2 transition-all disabled:opacity-30',
            operate ? 'bg-warning text-warning-foreground border-warning shadow-[0_0_14px] shadow-warning/50' : 'bg-card text-warning border-warning hover:bg-warning-muted')}>
          {operate ? 'OPERATE' : 'STANDBY'}
        </button>
        <span className="text-xs text-muted-foreground">
          {operate ? t('flxp.ampInLine') : t('flxp.ampBypassed')}
        </span>
        {(pg.host || pg.connected) && (
          <label className="flex items-center gap-1.5 text-xs" title={pg.connected ? t('flxp.pgConnected') : (pg.last_error || t('flxp.pgOffline'))}>
            <span className={cn('size-1.5 rounded-full', pg.connected ? 'bg-success shadow-[0_0_6px_rgba(16,185,129,0.8)]' : 'bg-danger')} />
            <span className="text-muted-foreground">{t('flxp.fan')}</span>
            <select
              disabled={!pg.connected}
              value={(pg.fan_mode || 'CONTEST').toUpperCase()}
              onChange={(e) => AmpFanMode(amp.id, e.target.value).catch(() => {})}
              className="h-8 rounded-md border border-warning-border bg-card px-2 text-xs font-semibold text-warning outline-none focus:border-warning disabled:opacity-40"
            >
              <option value="STANDARD">{t('flxp.fanStandard')}</option>
              <option value="CONTEST">{t('flxp.fanContest')}</option>
              <option value="BROADCAST">{t('flxp.fanBroadcast')}</option>
            </select>
          </label>
        )}
        <div className="flex-1" />
        {fault && fault !== 'NONE' && (
          <span className="px-2 py-1 rounded bg-danger-muted text-danger-muted-foreground text-xs font-bold">{t('flxp.fault')}: {fault}</span>
        )}
      </div>
      {/* Amplifier meters (FWD / ID / TEMP …) from the FlexRadio UDP stream. */}
      {viaFlex && (() => {
        const meters = (flex?.meters as any[]) || [];
        const dbmToW = (d: number) => Math.pow(10, (d - 30) / 10);
        const amps = meters.filter((m) => (m.src || '').toUpperCase().includes('AMP')
          && !/^(RL|DRV)$/i.test((m.name || '').trim()));
        if (amps.length === 0) return null;
        return (
          <div className="grid grid-cols-2 sm:grid-cols-3 gap-2 mt-2 pt-2 border-t border-border/50">
            {amps.map((m) => {
              if (/fwd|pwr/i.test(m.name || '') && /dbm/i.test(m.unit || '')) {
                return <MeterBar key={m.id} compact label={m.name || `AMP ${m.id}`} value={peakHold(`amp${m.id}`, dbmToW(m.value))} unit="W" lo={0} hi={2000} accent="#dc2626" />;
              }
              const acc = /temp|degc|degf/i.test(`${m.unit}${m.name}`) ? '#ea580c' : /volt/i.test(m.unit || '') ? '#2563eb' : '#16a34a';
              let lo = m.lo, hi = m.hi;
              if (/amp/i.test(m.unit || '') || /^ID$|current/i.test(m.name || '')) {
                lo = 0;
                hi = m.hi >= 25 ? m.hi : 25;
              }
              return <MeterBar key={m.id} compact label={m.name || `AMP ${m.id}`} value={peakHold(`amp${m.id}`, m.value)} unit={m.unit} lo={lo} hi={hi} accent={acc} />;
            })}
          </div>
        );
      })()}
    </Card>
  );
}