import { 
  TrendingUp, 
  DollarSign, 
  Calendar, 
  Clock,
  CheckCircle2,
  ListTodo,
  AlertTriangle
} from "lucide-react";

import { Card, CardContent } from "@/components/ui/card";
import { Progress } from "@/components/ui/progress";
import { Project } from "@/types/project";

interface ProjectStatsProps {
  project: Project;
  taskStats: {
    total: number;
    completed: number;
    inProgress: number;
    highPriority: number;
    overdue: number;
    completionRate: number;
    totalPlannedHours: number;
    totalWorkedHours: number;
  };
}

// Formatear moneda
function formatCurrency(amount: number): string {
  return new Intl.NumberFormat("es-ES", {
    style: "currency",
    currency: "EUR",
    minimumFractionDigits: 0,
    maximumFractionDigits: 0,
  }).format(amount);
}

// Formatear fecha
function formatDate(dateString: string): string {
  return new Date(dateString).toLocaleDateString("es-ES", {
    day: "numeric",
    month: "short",
  });
}

// Calcular días restantes
function getDaysRemaining(endDate: string): number {
  const end = new Date(endDate);
  const today = new Date();
  const diff = end.getTime() - today.getTime();
  return Math.ceil(diff / (1000 * 60 * 60 * 24));
}

export function ProjectStats({ project, taskStats }: ProjectStatsProps) {
  const daysRemaining = getDaysRemaining(project.endDate);
  const isOverdue = daysRemaining < 0;
  const budgetUsedPercent = project.budget > 0 ? (project.spent / project.budget) * 100 : 0;

  return (
    <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
      {/* Progreso */}
      <Card>
        <CardContent className="p-4">
          <div className="flex items-center gap-3">
            <div className="p-2 rounded-lg bg-blue-100 dark:bg-blue-900/30">
              <TrendingUp className="h-5 w-5 text-blue-600 dark:text-blue-400" />
            </div>
            <div className="flex-1 min-w-0">
              <p className="text-sm text-muted-foreground">Progreso</p>
              <p className="text-2xl font-bold">{project.progress}%</p>
            </div>
          </div>
          <Progress value={project.progress} className="mt-3 h-1.5" />
        </CardContent>
      </Card>

      {/* Presupuesto */}
      <Card>
        <CardContent className="p-4">
          <div className="flex items-center gap-3">
            <div className="p-2 rounded-lg bg-green-100 dark:bg-green-900/30">
              <DollarSign className="h-5 w-5 text-green-600 dark:text-green-400" />
            </div>
            <div className="flex-1 min-w-0">
              <p className="text-sm text-muted-foreground">Presupuesto</p>
              <p className="text-2xl font-bold">{formatCurrency(project.budget)}</p>
            </div>
          </div>
          <div className="mt-3 flex items-center justify-between text-xs">
            <span className="text-muted-foreground">
              Usado: {formatCurrency(project.spent)}
            </span>
            <span className={budgetUsedPercent > 90 ? "text-red-500" : "text-muted-foreground"}>
              {budgetUsedPercent.toFixed(0)}%
            </span>
          </div>
        </CardContent>
      </Card>

      {/* Fecha límite */}
      <Card>
        <CardContent className="p-4">
          <div className="flex items-center gap-3">
            <div className={`p-2 rounded-lg ${isOverdue ? "bg-red-100 dark:bg-red-900/30" : "bg-purple-100 dark:bg-purple-900/30"}`}>
              <Calendar className={`h-5 w-5 ${isOverdue ? "text-red-600 dark:text-red-400" : "text-purple-600 dark:text-purple-400"}`} />
            </div>
            <div className="flex-1 min-w-0">
              <p className="text-sm text-muted-foreground">Fecha límite</p>
              <p className="text-2xl font-bold">{formatDate(project.endDate)}</p>
            </div>
          </div>
          <p className={`mt-3 text-xs ${isOverdue ? "text-red-500" : "text-muted-foreground"}`}>
            {isOverdue 
              ? `${Math.abs(daysRemaining)} días de retraso` 
              : `${daysRemaining} días restantes`
            }
          </p>
        </CardContent>
      </Card>

      {/* Tareas */}
      <Card>
        <CardContent className="p-4">
          <div className="flex items-center gap-3">
            <div className="p-2 rounded-lg bg-orange-100 dark:bg-orange-900/30">
              <ListTodo className="h-5 w-5 text-orange-600 dark:text-orange-400" />
            </div>
            <div className="flex-1 min-w-0">
              <p className="text-sm text-muted-foreground">Tareas</p>
              <p className="text-2xl font-bold">{taskStats.completed}/{taskStats.total}</p>
            </div>
          </div>
          <div className="mt-3 flex items-center gap-3 text-xs">
            {taskStats.highPriority > 0 && (
              <span className="flex items-center gap-1 text-red-500">
                <AlertTriangle className="h-3 w-3" />
                {taskStats.highPriority} alta prioridad
              </span>
            )}
            {taskStats.overdue > 0 && (
              <span className="flex items-center gap-1 text-yellow-600 dark:text-yellow-500">
                <Clock className="h-3 w-3" />
                {taskStats.overdue} vencidas
              </span>
            )}
            {taskStats.highPriority === 0 && taskStats.overdue === 0 && (
              <span className="flex items-center gap-1 text-green-600 dark:text-green-500">
                <CheckCircle2 className="h-3 w-3" />
                Todo en orden
              </span>
            )}
          </div>
        </CardContent>
      </Card>
    </div>
  );
}