'use client';

import { useMemo } from 'react';
import { useShallow } from 'zustand/react/shallow';
import { useCombatStore, usePrestigeStore } from '@/lib/game/stores';
import { FLOOR_ELEM_CYCLE } from '@/lib/game/constants';
import { getGuardianForFloor, getAllGuardianFloors } from '@/lib/game/data/guardian-encounters';
import { Card, CardContent } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { ScrollArea } from '@/components/ui/scroll-area';
import { SectionHeader } from '@/components/ui/section-header';
import { DebugName } from '@/components/game/debug/debug-context';
import {
  getCounterElement, getElementColor, fmtArmor, fmtShield, fmtBarrier, fmtRegen,
  PreparationTips, GuardianRoster, FloorProgressBar,
} from './SpireSummaryTab.helpers';

// ─── Top Stats Row ───────────────────────────────────────────────────────────

function TopStatsRow({ maxFloorReached, totalFloorsCleared, defeatedCount, insight }: {
  maxFloorReached: number; totalFloorsCleared: number; defeatedCount: number; insight: number;
}) {
  return (
    <Card className="bg-gray-900/60 border-gray-700">
      <CardContent className="py-4">
        <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
          <StatCell value={maxFloorReached} label="Max Floor Reached" color="text-amber-400" />
          <StatCell value={totalFloorsCleared} label="Floors Cleared" color="text-gray-200" />
          <StatCell value={defeatedCount} label="Guardians Defeated" color="text-emerald-400" />
          <StatCell value={insight} label="Insight Earned" color="text-purple-400" isFmt />
        </div>
      </CardContent>
    </Card>
  );
}

function StatCell({ value, label, color, isFmt }: { value: number; label: string; color: string; isFmt?: boolean }) {
  return (
    <div className="text-center">
      <div className={`text-2xl font-bold ${color}`}>{isFmt ? value : value}</div>
      <div className="text-xs text-gray-400 mt-0.5">{label}</div>
    </div>
  );
}

// ─── Next Guardian Card ──────────────────────────────────────────────────────

function NextGuardianCard({ nextGuardian, nextGuardianData }: { nextGuardian: number; nextGuardianData: ReturnType<typeof getGuardianForFloor> }) {
  if (!nextGuardianData) return null;
  const counterElement = getCounterElement(nextGuardianData.element[0]);
  const nextFloorElement = FLOOR_ELEM_CYCLE[(nextGuardian - 1) % FLOOR_ELEM_CYCLE.length];

  return (
    <Card className="bg-gray-900/60 border-amber-800/40">
      <SectionHeader title={`🛡️ Next Guardian — Floor ${nextGuardian}`} className="text-amber-400" />
      <CardContent className="pt-0 space-y-3">
        <div className="flex items-center gap-3">
          <div
            className="w-10 h-10 rounded-full flex items-center justify-center text-lg font-bold"
            style={{
              backgroundColor: `${nextGuardianData.color}20`,
              border: `2px solid ${nextGuardianData.color}`,
              color: nextGuardianData.color,
            }}
          >
            {nextGuardian}
          </div>
          <div>
            <div className="font-semibold text-gray-100">{nextGuardianData.name}</div>
            <div className="flex items-center gap-2 mt-0.5 flex-wrap">
              <Badge variant="outline" className="text-xs" style={{ borderColor: getElementColor(nextGuardianData.element[0]), color: getElementColor(nextGuardianData.element[0]) }}>
                {nextGuardianData.element.join(' + ')}
              </Badge>
              <span className="text-xs text-gray-500">Health: {nextGuardianData.hp}</span>
              {fmtArmor(nextGuardianData.armor)}
              {fmtShield(nextGuardianData.shield)}
              {fmtBarrier(nextGuardianData.barrier)}
              {fmtRegen(nextGuardianData.healthRegen, nextGuardianData.healthRegenIsPercent)}
            </div>
          </div>
        </div>
        <PreparationTips counterElement={counterElement} nextFloorElement={nextFloorElement} hasHighArmor={!!(nextGuardianData.armor && nextGuardianData.armor > 0.15)} />
      </CardContent>
    </Card>
  );
}

// ─── Main Component ───────────────────────────────────────────────────────────

export function SpireSummaryTab() {
  const { maxFloorReached, clearedFloors, enterSpireMode } = useCombatStore(useShallow((s) => ({
    maxFloorReached: s.maxFloorReached,
    clearedFloors: s.clearedFloors,
    enterSpireMode: s.enterSpireMode,
  })));
  const { insight } = usePrestigeStore(useShallow((s) => ({ insight: s.insight })));

  const defeatedGuardians = useMemo(() => getAllGuardianFloors().filter((floor) => clearedFloors[floor]), [clearedFloors]);
  const nextGuardian = useMemo(() => getAllGuardianFloors().find((floor) => !clearedFloors[floor]) || null, [clearedFloors]);
  const nextGuardianData = nextGuardian ? getGuardianForFloor(nextGuardian) : null;
  const totalFloorsCleared = useMemo(() => Object.values(clearedFloors).filter(Boolean).length, [clearedFloors]);

  return (
    <DebugName name="SpireSummaryTab">
      <div className="space-y-4">
        <TopStatsRow maxFloorReached={maxFloorReached} totalFloorsCleared={totalFloorsCleared} defeatedCount={defeatedGuardians.length} insight={insight} />
        {nextGuardianData && nextGuardian && <NextGuardianCard nextGuardian={nextGuardian} nextGuardianData={nextGuardianData} />}
        <GuardianRoster clearedFloors={clearedFloors} />
        <Card className="bg-gray-900/60 border-gray-700">
          <SectionHeader title="🗺️ Floor Progress" />
          <CardContent className="pt-0">
            <ScrollArea className="h-[300px] pr-2">
              <FloorProgressBar maxFloor={maxFloorReached} clearedFloors={clearedFloors} />
            </ScrollArea>
          </CardContent>
        </Card>
      </div>
    </DebugName>
  );
}

SpireSummaryTab.displayName = 'SpireSummaryTab';