import { useState } from 'react';
import { Swords, TrendingUp, Shield, Users, Brain, ShoppingCart } from 'lucide-react';
import { useGameStore } from '@/store';
import { ConfirmModal } from '@/components/common/ConfirmModal';
import { Tooltip } from '@/components/common/Tooltip';
import { formatMoney, formatNumber } from '@ai-tycoon/shared';
import type { Era } from '@ai-tycoon/shared';

const ARCHETYPE_LABELS: Record<string, string> = {
  'safety-first': 'Safety-First Lab',
  'move-fast': 'Move-Fast Startup',
  'big-tech': 'Big Tech Giant',
  'open-source': 'Open Source Maximalist',
  'stealth-startup': 'Stealth Startup',
};

const ARCHETYPE_COLORS: Record<string, string> = {
  'safety-first': 'text-green-400',
  'move-fast': 'text-red-400',
  'big-tech': 'text-blue-400',
  'open-source': 'text-orange-400',
  'stealth-startup': 'text-purple-400',
};

export function CompetitorsPage() {
  const rivals = useGameStore((s) => s.competitors.rivals);
  const industryBenchmark = useGameStore((s) => s.competitors.industryBenchmark);
  const playerBest = useGameStore((s) => s.models.bestDeployedModelScore);
  const era = useGameStore((s) => s.meta.currentEra);
  const money = useGameStore((s) => s.economy.money);
  const acquireCompetitor = useGameStore((s) => s.acquireCompetitor);
  const canAcquire = (era: Era) => era === 'bigtech' || era === 'agi';
  const [acquireConfirm, setAcquireConfirm] = useState<{ id: string; name: string; cost: number } | null>(null);

  return (
    <div className="space-y-6">
      <div className="flex items-center justify-between">
        <h2 className="text-2xl font-bold">Competitors</h2>
        <div className="text-sm text-surface-400">
          Industry Benchmark: <span className="text-surface-100 font-mono">{industryBenchmark.toFixed(1)}</span>
        </div>
      </div>

      <div className="bg-surface-900 border border-surface-700 rounded-xl p-4">
        <h3 className="text-sm font-medium text-surface-400 mb-3">Your Position</h3>
        <div className="flex items-center gap-6">
          <div>
            <div className="text-xs text-surface-500">Best Model</div>
            <div className="text-lg font-mono font-bold">{playerBest.toFixed(1)}/100</div>
          </div>
          <div className="flex-1">
            <div className="h-3 bg-surface-800 rounded-full overflow-hidden relative">
              <div
                className="absolute h-full bg-accent rounded-full transition-all"
                style={{ width: `${playerBest}%` }}
              />
              {rivals.filter(r => r.status === 'active').map(rival => (
                <div
                  key={rival.id}
                  className="absolute top-0 h-full w-0.5 bg-danger"
                  style={{ left: `${rival.estimatedCapability}%` }}
                />
              ))}
            </div>
            <div className="flex items-center gap-4 mt-1.5 text-[10px]">
              <span className="flex items-center gap-1"><span className="w-2 h-2 rounded-full bg-accent inline-block" />You: {playerBest.toFixed(1)}</span>
              {rivals.filter(r => r.status === 'active').map(rival => (
                <span key={rival.id} className="flex items-center gap-1"><span className="w-2 h-0.5 bg-danger inline-block" />{rival.name}: {rival.estimatedCapability.toFixed(1)}</span>
              ))}
            </div>
          </div>
        </div>
      </div>

      <div className="space-y-4">
        {rivals.map(rival => (
          <div
            key={rival.id}
            className={`bg-surface-900 border rounded-xl p-4 ${
              rival.status === 'active' ? 'border-surface-700' : 'border-surface-800 opacity-50'
            }`}
          >
            <div className="flex items-center justify-between mb-3">
              <div>
                <h3 className="font-semibold text-lg">{rival.name}</h3>
                <span className={`text-xs ${ARCHETYPE_COLORS[rival.archetype]}`}>
                  {ARCHETYPE_LABELS[rival.archetype]}
                </span>
              </div>
              <div className="flex items-center gap-2">
                {canAcquire(era) && rival.status === 'active' && (() => {
                  const cost = rival.estimatedRevenue * 500 + rival.estimatedCapability * 100_000;
                  return (
                    <div className="text-right">
                      <button
                        onClick={() => setAcquireConfirm({ id: rival.id, name: rival.name, cost })}
                        disabled={money < cost}
                        className="flex items-center gap-1 bg-blue-600/20 hover:bg-blue-600/30 text-blue-400 border border-blue-600/30 rounded px-3 py-1.5 text-xs disabled:opacity-40 disabled:cursor-not-allowed"
                      >
                        <ShoppingCart size={12} />
                        Acquire ({formatMoney(cost)})
                      </button>
                      {money < cost && (
                        <div className="text-[10px] text-warning mt-0.5">Need {formatMoney(cost - money)} more</div>
                      )}
                    </div>
                  );
                })()}
                <span className={`text-xs px-2 py-1 rounded-full ${
                  rival.status === 'active' ? 'bg-success/20 text-success' :
                  rival.status === 'acquired' ? 'bg-blue-500/20 text-blue-400' :
                  'bg-surface-700 text-surface-400'
                }`}>
                  {rival.status}
                </span>
              </div>
            </div>

            <div className="grid grid-cols-4 gap-4">
              <Stat icon={Brain} label="Capability" value={rival.estimatedCapability.toFixed(1)} sub={rival.latestModelName} />
              <Stat icon={TrendingUp} label="Est. Revenue" value={formatMoney(rival.estimatedRevenue)} sub="/tick" />
              <Stat icon={Users} label="Est. Users" value={formatNumber(rival.estimatedUsers)} />
              <Stat icon={Shield} label="Reputation" value={`${rival.reputation}/100`} />
            </div>

            <div className="mt-3 grid grid-cols-6 gap-1">
              {Object.entries(rival.personality).map(([key, val]) => (
                <div key={key} className="text-center">
                  <div className="h-1 bg-surface-800 rounded-full overflow-hidden mb-1">
                    <div className="h-full bg-accent rounded-full" style={{ width: `${(val as number) * 100}%` }} />
                  </div>
                  <div className="text-[10px] text-surface-500 capitalize">{key.replace(/([A-Z])/g, ' $1').trim()}</div>
                </div>
              ))}
            </div>
          </div>
        ))}
      </div>

      {rivals.length === 0 && (
        <div className="bg-surface-900 border border-surface-700 rounded-xl p-8 text-center text-surface-500">
          <Swords size={48} className="mx-auto mb-4 opacity-50" />
          <p>No competitors detected yet.</p>
        </div>
      )}

      {acquireConfirm && (
        <ConfirmModal
          title="Acquire Competitor"
          message={`Acquire "${acquireConfirm.name}" for ${formatMoney(acquireConfirm.cost)}? This will absorb their users and technology. This cannot be undone.`}
          confirmLabel={`Acquire (${formatMoney(acquireConfirm.cost)})`}
          danger
          onConfirm={() => { acquireCompetitor(acquireConfirm.id); setAcquireConfirm(null); }}
          onCancel={() => setAcquireConfirm(null)}
        />
      )}
    </div>
  );
}

function Stat({ icon: Icon, label, value, sub }: {
  icon: typeof Brain;
  label: string;
  value: string;
  sub?: string;
}) {
  return (
    <div className="bg-surface-800 rounded-lg p-2">
      <div className="flex items-center gap-1 mb-1">
        <Icon size={12} className="text-surface-400" />
        <span className="text-xs text-surface-400">{label}</span>
      </div>
      <div className="text-sm font-mono font-semibold">{value}</div>
      {sub && <div className="text-[10px] text-surface-500">{sub}</div>}
    </div>
  );
}