'use client';

import { Progress } from '@/components/ui/progress';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { Zap, Flame, Sparkles } from 'lucide-react';
import type { ComboState } from '@/lib/game/types';
import { ELEMENTS } from '@/lib/game/constants';

interface ComboMeterProps {
  combo: ComboState;
  isClimbing: boolean;
}

export function ComboMeter({ combo, isClimbing }: ComboMeterProps) {
  const comboPercent = Math.min(100, combo.count);
  const multiplierPercent = Math.min(100, ((combo.multiplier - 1) / 2) * 100); // Max 300% = 200% bonus
  
  // Combo tier names
  const getComboTier = (count: number): { name: string; color: string } => {
    if (count >= 100) return { name: 'LEGENDARY', color: 'text-amber-400' };
    if (count >= 75) return { name: 'Master', color: 'text-purple-400' };
    if (count >= 50) return { name: 'Expert', color: 'text-blue-400' };
    if (count >= 25) return { name: 'Adept', color: 'text-green-400' };
    if (count >= 10) return { name: 'Novice', color: 'text-cyan-400' };
    return { name: 'Building...', color: 'text-gray-400' };
  };
  
  const tier = getComboTier(combo.count);
  const hasElementChain = combo.elementChain.length === 3 && new Set(combo.elementChain).size === 3;
  
  if (!isClimbing && combo.count === 0) {
    return null;
  }
  
  return (
    <Card className="bg-gray-900/80 border-gray-700">
      <CardHeader className="pb-2">
        <CardTitle className="text-amber-400 game-panel-title text-xs flex items-center gap-2">
          <Zap className="w-4 h-4" />
          Combo Meter
          {combo.count >= 10 && (
            <Badge className={`ml-auto ${tier.color} bg-gray-800`}>
              {tier.name}
            </Badge>
          )}
        </CardTitle>
      </CardHeader>
      <CardContent className="space-y-3">
        {/* Combo Count */}
        <div className="space-y-1">
          <div className="flex justify-between items-center text-sm">
            <span className="text-gray-400">Hits</span>
            <span className={`font-bold ${tier.color}`}>
              {combo.count}
              {combo.maxCombo > combo.count && (
                <span className="text-gray-500 text-xs ml-2">max: {combo.maxCombo}</span>
              )}
            </span>
          </div>
          <Progress 
            value={comboPercent} 
            className="h-2 bg-gray-800"
          />
        </div>
        
        {/* Multiplier */}
        <div className="space-y-1">
          <div className="flex justify-between items-center text-sm">
            <span className="text-gray-400">Multiplier</span>
            <span className="font-bold text-amber-400">
              {combo.multiplier.toFixed(2)}x
            </span>
          </div>
          <div className="h-2 bg-gray-800 rounded-full overflow-hidden">
            <div
              className="h-full rounded-full transition-all duration-300"
              style={{
                width: `${multiplierPercent}%`,
                background: `linear-gradient(90deg, #F59E0B, #EF4444)`,
              }}
            />
          </div>
        </div>
        
        {/* Element Chain */}
        {combo.elementChain.length > 0 && (
          <div className="space-y-1">
            <div className="flex justify-between items-center text-sm">
              <span className="text-gray-400">Element Chain</span>
              {hasElementChain && (
                <span className="text-green-400 text-xs">+25% bonus!</span>
              )}
            </div>
            <div className="flex gap-1">
              {combo.elementChain.map((elem, i) => {
                const elemDef = ELEMENTS[elem];
                return (
                  <div
                    key={i}
                    className="w-8 h-8 rounded border flex items-center justify-center text-xs"
                    style={{
                      borderColor: elemDef?.color || '#60A5FA',
                      backgroundColor: `${elemDef?.color}20`,
                      color: elemDef?.color || '#60A5FA',
                    }}
                  >
                    {elemDef?.sym || '?'}
                  </div>
                );
              })}
              {/* Empty slots */}
              {Array.from({ length: 3 - combo.elementChain.length }).map((_, i) => (
                <div
                  key={`empty-${i}`}
                  className="w-8 h-8 rounded border border-gray-700 bg-gray-800/50 flex items-center justify-center text-gray-600"
                >
                  ?
                </div>
              ))}
            </div>
          </div>
        )}
        
        {/* Decay Warning */}
        {isClimbing && combo.count > 0 && combo.decayTimer <= 3 && (
          <div className="text-xs text-red-400 flex items-center gap-1">
            <Flame className="w-3 h-3" />
            Combo decaying soon!
          </div>
        )}
        
        {/* Not climbing warning */}
        {!isClimbing && combo.count > 0 && (
          <div className="text-xs text-amber-400 flex items-center gap-1">
            <Sparkles className="w-3 h-3" />
            Resume climbing to maintain combo
          </div>
        )}
      </CardContent>
    </Card>
  );
}