'use client';

import { AssigneeWorkload, StatusDistribution } from '@/lib/types';

interface TeamActivityHeatmapProps {
  workloadByAssignee: AssigneeWorkload[];
  statusDistribution: StatusDistribution[];
  className?: string;
}

export function TeamActivityHeatmap({ workloadByAssignee, statusDistribution, className }: TeamActivityHeatmapProps) {
  // Calculer l'intensité maximale pour la normalisation
  const maxWorkload = Math.max(...workloadByAssignee.map(a => a.totalActive));
  
  // Fonction pour calculer l'intensité de couleur
  const getIntensity = (value: number) => {
    if (maxWorkload === 0) return 0;
    return (value / maxWorkload) * 100;
  };

  // Couleurs pour les différents types de travail
  const getWorkloadColor = (todo: number, inProgress: number, review: number) => {
    const total = todo + inProgress + review;
    if (total === 0) return null; // Géré séparément
    
    // Dominante par type de travail avec couleurs CSS directes (versions plus douces)
    if (review > inProgress && review > todo) {
      return '#a855f7'; // purple-500 - Review dominant (plus doux)
    } else if (inProgress > todo) {
      return '#f59e0b'; // amber-500 - In Progress dominant (plus doux)
    } else {
      return '#3b82f6'; // blue-500 - Todo dominant (plus doux)
    }
  };

  const getOpacity = (total: number) => {
    const intensity = getIntensity(total);
    return Math.max(0.6, Math.min(0.9, intensity / 100)); // Opacité plus élevée et moins de variation
  };

  return (
    <div className={className}>
      <div className="space-y-4">
        {/* Heatmap des assignees */}
        <div>
          <h4 className="text-sm font-medium mb-3">Intensité de travail par membre</h4>
          <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-2">
            {workloadByAssignee.map(assignee => {
              const bgColor = getWorkloadColor(assignee.todoCount, assignee.inProgressCount, assignee.reviewCount);
              const isEmpty = assignee.totalActive === 0;
              
              return (
                <div
                  key={assignee.assignee}
                  className={`relative p-3 rounded-lg border border-[var(--border)] transition-all hover:scale-105 ${
                    isEmpty ? 'bg-[var(--muted)]/30' : ''
                  }`}
                  style={bgColor ? {
                    backgroundColor: bgColor,
                    opacity: getOpacity(assignee.totalActive)
                  } : {
                    opacity: getOpacity(assignee.totalActive)
                  }}
                >
                <div className={isEmpty ? "text-[var(--foreground)] text-xs font-medium mb-1 truncate" : "text-white text-xs font-medium mb-1 truncate"}>
                  {assignee.displayName}
                </div>
                <div className={isEmpty ? "text-[var(--foreground)] text-lg font-bold" : "text-white text-lg font-bold"}>
                  {assignee.totalActive}
                </div>
                <div className={isEmpty ? "text-[var(--muted-foreground)] text-xs" : "text-white/80 text-xs"}>
                  {assignee.todoCount > 0 && `${assignee.todoCount} à faire`}
                  {assignee.inProgressCount > 0 && ` ${assignee.inProgressCount} en cours`}
                  {assignee.reviewCount > 0 && ` ${assignee.reviewCount} review`}
                </div>
              </div>
              );
            })}
          </div>
        </div>

        {/* Légende */}
        <div className="flex items-center gap-4 text-xs">
          <div className="flex items-center gap-2">
            <div className="w-3 h-3 bg-blue-500 rounded"></div>
            <span>À faire dominant</span>
          </div>
          <div className="flex items-center gap-2">
            <div className="w-3 h-3 bg-amber-500 rounded"></div>
            <span>En cours dominant</span>
          </div>
          <div className="flex items-center gap-2">
            <div className="w-3 h-3 bg-purple-500 rounded"></div>
            <span>Review dominant</span>
          </div>
          <div className="text-[var(--muted-foreground)]">
            (Opacité = charge de travail)
          </div>
        </div>

        {/* Matrice de statuts */}
        <div>
          <h4 className="text-sm font-medium mb-3">Répartition globale par statut</h4>
          <div className="grid grid-cols-2 md:grid-cols-4 gap-2">
            {statusDistribution.slice(0, 8).map(status => {
              const intensity = (status.count / Math.max(...statusDistribution.map(s => s.count))) * 100;
              return (
                <div
                  key={status.status}
                  className="p-3 rounded-lg border border-[var(--border)] bg-gradient-to-r from-[var(--primary)]/20 to-[var(--primary)]"
                  style={{
                    backgroundImage: `linear-gradient(to right, var(--primary) ${intensity}%, transparent ${intensity}%)`
                  }}
                >
                  <div className="text-[var(--foreground)] text-xs font-medium mb-1 truncate">
                    {status.status}
                  </div>
                  <div className="text-[var(--foreground)] text-lg font-bold">
                    {status.count}
                  </div>
                  <div className="text-[var(--foreground)]/80 text-xs">
                    {status.percentage}%
                  </div>
                </div>
              );
            })}
          </div>
        </div>

        {/* Métriques rapides */}
        <div className="grid grid-cols-3 gap-4 pt-4 border-t border-[var(--border)]">
          <div className="text-center">
            <div className="text-2xl font-bold text-green-500">
              {workloadByAssignee.filter(a => a.totalActive > 0).length}
            </div>
            <div className="text-xs text-[var(--muted-foreground)]">
              Membres actifs
            </div>
          </div>
          <div className="text-center">
            <div className="text-2xl font-bold text-orange-500">
              {workloadByAssignee.reduce((sum, a) => sum + a.totalActive, 0)}
            </div>
            <div className="text-xs text-[var(--muted-foreground)]">
              Total WIP
            </div>
          </div>
          <div className="text-center">
            <div className="text-2xl font-bold text-blue-500">
              {Math.round(workloadByAssignee.reduce((sum, a) => sum + a.totalActive, 0) / Math.max(1, workloadByAssignee.filter(a => a.totalActive > 0).length) * 10) / 10}
            </div>
            <div className="text-xs text-[var(--muted-foreground)]">
              WIP moyen/membre
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}