import { 
  FileText, 
  Building2, 
  Calendar, 
  Clock, 
  Hash,
} from "lucide-react";

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

interface ProjectInfoProps {
  project: Project;
}

// Formatear moneda
function formatCurrency(amount: number): string {
  return new Intl.NumberFormat("es-ES", {
    style: "currency",
    currency: "EUR",
    minimumFractionDigits: 2,
  }).format(amount);
}

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

// Calcular duración en días
function getDuration(startDate: string, endDate: string): number {
  const start = new Date(startDate);
  const end = new Date(endDate);
  const diff = end.getTime() - start.getTime();
  return Math.ceil(diff / (1000 * 60 * 60 * 24));
}

export function ProjectInfo({ project }: ProjectInfoProps) {
  const duration = getDuration(project.startDate, project.endDate);
  const budgetUsed = project.budget > 0 ? (project.spent / project.budget) * 100 : 0;
  const budgetRemaining = project.budget - project.spent;

  return (
    <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
      {/* Columna principal - 2/3 */}
      <div className="lg:col-span-2 space-y-6">
        {/* Descripción */}
        <Card>
          <CardHeader className="pb-3">
            <CardTitle className="flex items-center gap-2 text-base">
              <FileText className="h-4 w-4 text-muted-foreground" />
              Descripción
            </CardTitle>
          </CardHeader>
          <CardContent>
            {project.description ? (
              <p className="text-sm text-muted-foreground whitespace-pre-wrap leading-relaxed">
                {project.description}
              </p>
            ) : (
              <p className="text-sm text-muted-foreground italic">
                Sin descripción disponible
              </p>
            )}
          </CardContent>
        </Card>

        {/* Información financiera */}
        <Card>
          <CardHeader className="pb-3">
            <CardTitle className="text-base">Información Financiera</CardTitle>
          </CardHeader>
          <CardContent className="space-y-6">
            {/* Barra de progreso del presupuesto */}
            <div>
              <div className="flex items-center justify-between mb-2">
                <span className="text-sm font-medium">Uso del presupuesto</span>
                <span className={`text-sm font-medium ${budgetUsed > 90 ? "text-red-500" : ""}`}>
                  {budgetUsed.toFixed(1)}%
                </span>
              </div>
              <Progress 
                value={Math.min(budgetUsed, 100)} 
                className={`h-2 ${budgetUsed > 100 ? "[&>div]:bg-red-500" : ""}`}
              />
            </div>

            {/* Desglose */}
            <div className="grid grid-cols-3 gap-4">
              <div className="text-center p-4 rounded-lg bg-muted/50">
                <p className="text-sm text-muted-foreground mb-1">Presupuesto</p>
                <p className="text-xl font-bold">{formatCurrency(project.budget)}</p>
              </div>
              <div className="text-center p-4 rounded-lg bg-muted/50">
                <p className="text-sm text-muted-foreground mb-1">Gastado</p>
                <p className="text-xl font-bold text-blue-600 dark:text-blue-400">
                  {formatCurrency(project.spent)}
                </p>
              </div>
              <div className="text-center p-4 rounded-lg bg-muted/50">
                <p className="text-sm text-muted-foreground mb-1">Restante</p>
                <p className={`text-xl font-bold ${budgetRemaining < 0 ? "text-red-500" : "text-green-600 dark:text-green-400"}`}>
                  {formatCurrency(budgetRemaining)}
                </p>
              </div>
            </div>
          </CardContent>
        </Card>

        {/* Timeline */}
        <Card>
          <CardHeader className="pb-3">
            <CardTitle className="flex items-center gap-2 text-base">
              <Calendar className="h-4 w-4 text-muted-foreground" />
              Timeline del Proyecto
            </CardTitle>
          </CardHeader>
          <CardContent>
            <div className="relative">
              {/* Línea de progreso */}
              <div className="absolute top-4 left-0 right-0 h-1 bg-muted rounded-full">
                <div 
                  className="h-full bg-gradient-to-r from-blue-500 to-purple-600 rounded-full transition-all"
                  style={{ width: `${project.progress}%` }}
                />
              </div>
              
              {/* Puntos */}
              <div className="relative flex justify-between pt-8">
                <div className="text-center">
                  <div className="w-3 h-3 rounded-full bg-blue-500 mx-auto -mt-5 relative z-10" />
                  <p className="text-xs text-muted-foreground mt-2">Inicio</p>
                  <p className="text-sm font-medium">{formatDate(project.startDate)}</p>
                </div>
                <div className="text-center">
                  <div className={`w-3 h-3 rounded-full mx-auto -mt-5 relative z-10 ${project.progress >= 100 ? "bg-green-500" : "bg-gray-300 dark:bg-gray-600"}`} />
                  <p className="text-xs text-muted-foreground mt-2">Fin previsto</p>
                  <p className="text-sm font-medium">{formatDate(project.endDate)}</p>
                </div>
              </div>
            </div>
            
            <div className="mt-6 flex items-center justify-center gap-6 text-sm">
              <div className="flex items-center gap-2">
                <Clock className="h-4 w-4 text-muted-foreground" />
                <span className="text-muted-foreground">Duración:</span>
                <span className="font-medium">{duration} días</span>
              </div>
              <div className="flex items-center gap-2">
                <span className="text-muted-foreground">Progreso:</span>
                <span className="font-medium">{project.progress}%</span>
              </div>
            </div>
          </CardContent>
        </Card>
      </div>

      {/* Sidebar - 1/3 */}
      <div className="space-y-6">
        {/* Detalles generales */}
        <Card>
          <CardHeader className="pb-3">
            <CardTitle className="text-base">Detalles</CardTitle>
          </CardHeader>
          <CardContent className="space-y-4">
            {/* Cliente */}
            {project.client !== "Sin cliente" && (
              <>
                <div className="flex items-start gap-3">
                  <Building2 className="h-4 w-4 text-muted-foreground mt-0.5" />
                  <div>
                    <p className="text-xs text-muted-foreground">Cliente</p>
                    <p className="text-sm font-medium">{project.client}</p>
                  </div>
                </div>
                <Separator />
              </>
            )}

            {/* Referencia */}
            <div className="flex items-start gap-3">
              <Hash className="h-4 w-4 text-muted-foreground mt-0.5" />
              <div>
                <p className="text-xs text-muted-foreground">Referencia</p>
                <p className="text-sm font-medium font-mono">{project.ref}</p>
              </div>
            </div>

            <Separator />

            {/* ID */}
            <div className="flex items-start gap-3">
              <Hash className="h-4 w-4 text-muted-foreground mt-0.5" />
              <div>
                <p className="text-xs text-muted-foreground">ID del proyecto</p>
                <p className="text-sm font-medium font-mono">{project.id}</p>
              </div>
            </div>
          </CardContent>
        </Card>

        {/* Fechas */}
        <Card>
          <CardHeader className="pb-3">
            <CardTitle className="text-base">Fechas</CardTitle>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex items-start gap-3">
              <Calendar className="h-4 w-4 text-muted-foreground mt-0.5" />
              <div>
                <p className="text-xs text-muted-foreground">Fecha de inicio</p>
                <p className="text-sm font-medium">{formatDate(project.startDate)}</p>
              </div>
            </div>

            <Separator />

            <div className="flex items-start gap-3">
              <Calendar className="h-4 w-4 text-muted-foreground mt-0.5" />
              <div>
                <p className="text-xs text-muted-foreground">Fecha de fin</p>
                <p className="text-sm font-medium">{formatDate(project.endDate)}</p>
              </div>
            </div>

            <Separator />

            <div className="flex items-start gap-3">
              <Clock className="h-4 w-4 text-muted-foreground mt-0.5" />
              <div>
                <p className="text-xs text-muted-foreground">Creado</p>
                <p className="text-sm font-medium">{formatDate(project.createdAt)}</p>
              </div>
            </div>

            <Separator />

            <div className="flex items-start gap-3">
              <Clock className="h-4 w-4 text-muted-foreground mt-0.5" />
              <div>
                <p className="text-xs text-muted-foreground">Última actualización</p>
                <p className="text-sm font-medium">{formatDate(project.updatedAt)}</p>
              </div>
            </div>
          </CardContent>
        </Card>
      </div>
    </div>
  );
}