"use client";

import { ArrowLeft, Calendar, DollarSign, TrendingUp, FileText, Building2 } from 'lucide-react';
import { useRouter } from 'next/navigation';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Avatar, AvatarFallback } from '@/components/ui/avatar';
import { Button } from '@/components/ui/button';
import { Separator } from '@/components/ui/separator';
import { ProjectStatusBadge } from '@/components/ui/project-status-badge';
import { Project } from '@/types/project';

interface ProjectDetailProps {
  project: Project;
}

// Función para generar iniciales
function getInitials(name: string): string {
  return name
    .split(' ')
    .map(word => word[0])
    .join('')
    .toUpperCase()
    .slice(0, 2);
}

/**
 * Componente de detalle completo de un proyecto
 * Muestra toda la información disponible del proyecto
 */
export default function ProjectDetail({ project }: ProjectDetailProps) {
  const router = useRouter();
  const initials = getInitials(project.name);

  return (
    <div className="min-h-screen bg-background">
      {/* Header */}
      <div className="bg-card border-b">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-6">
          <Button
            variant="ghost"
            onClick={() => router.back()}
            className="mb-4"
          >
            <ArrowLeft className="w-4 h-4 mr-2" />
            Volver
          </Button>

          <div className="flex items-start gap-6">
            <Avatar className="w-20 h-20">
              <AvatarFallback className="bg-gradient-to-br from-blue-500 to-purple-600 text-white font-semibold text-2xl">
                {initials}
              </AvatarFallback>
            </Avatar>

            <div className="flex-1">
              <div className="flex items-start justify-between">
                <div>
                  <h1 className="text-3xl font-bold mb-2">{project.name}</h1>
                  <p className="text-muted-foreground mb-3">{project.ref}</p>
                  <ProjectStatusBadge status={project.status} className="text-base px-4 py-1" />
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>

      {/* Content */}
      <main className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
        <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
          {/* Main Content */}
          <div className="lg:col-span-2 space-y-6">
            {/* Descripción */}
            {project.description && (
              <Card>
                <CardHeader>
                  <CardTitle className="flex items-center gap-2">
                    <FileText className="w-5 h-5" />
                    Descripción
                  </CardTitle>
                </CardHeader>
                <CardContent>
                  <p className="text-muted-foreground whitespace-pre-wrap">{project.description}</p>
                </CardContent>
              </Card>
            )}

            {/* Progreso */}
            <Card>
              <CardHeader>
                <CardTitle className="flex items-center gap-2">
                  <TrendingUp className="w-5 h-5" />
                  Progreso del Proyecto
                </CardTitle>
              </CardHeader>
              <CardContent>
                <div className="space-y-4">
                  <div className="flex items-center justify-between">
                    <span className="text-sm font-medium text-muted-foreground">Avance Total</span>
                    <span className="text-2xl font-bold">{project.progress}%</span>
                  </div>
                  <div className="w-full bg-muted rounded-full h-4">
                    <div
                      className="bg-gradient-to-r from-blue-500 to-purple-600 h-4 rounded-full transition-all duration-500"
                      style={{ width: `${project.progress}%` }}
                    />
                  </div>
                  <div className="grid grid-cols-2 gap-4 pt-4">
                    <div className="text-center p-4 bg-muted/50 rounded-lg">
                      <p className="text-sm text-muted-foreground mb-1">Estado</p>
                      <p className="text-lg font-semibold">
                        {project.status === '0' ? 'Borrador' : project.status === '1' ? 'En Progreso' : 'Finalizado'}
                      </p>
                    </div>
                    <div className="text-center p-4 bg-muted/50 rounded-lg">
                      <p className="text-sm text-muted-foreground mb-1">Completado</p>
                      <p className="text-lg font-semibold">
                        {project.progress === 100 ? 'Sí' : 'No'}
                      </p>
                    </div>
                  </div>
                </div>
              </CardContent>
            </Card>

            {/* Presupuesto */}
            <Card>
              <CardHeader>
                <CardTitle className="flex items-center gap-2">
                  <DollarSign className="w-5 h-5" />
                  Información Financiera
                </CardTitle>
              </CardHeader>
              <CardContent>
                <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                  <div className="space-y-2">
                    <p className="text-sm text-muted-foreground">Presupuesto Total</p>
                    <p className="text-3xl font-bold">
                      €{project.budget.toLocaleString('es-ES', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
                    </p>
                  </div>
                  <div className="space-y-2">
                    <p className="text-sm text-muted-foreground">Estimado Gastado</p>
                    <p className="text-3xl font-bold text-blue-600 dark:text-blue-400">
                      €{project.spent.toLocaleString('es-ES', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
                    </p>
                  </div>
                </div>
                <Separator className="my-4" />
                <div className="flex items-center justify-between p-4 bg-muted/50 rounded-lg">
                  <span className="text-sm font-medium text-muted-foreground">Restante</span>
                  <span className="text-xl font-bold text-green-600 dark:text-green-400">
                    €{(project.budget - project.spent).toLocaleString('es-ES', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
                  </span>
                </div>
              </CardContent>
            </Card>
          </div>

          {/* Sidebar */}
          <div className="space-y-6">
            {/* Información General */}
            <Card>
              <CardHeader>
                <CardTitle className="text-lg">Información General</CardTitle>
              </CardHeader>
              <CardContent className="space-y-4">
                {/* Cliente */}
                {project.client !== 'Sin cliente' && (
                  <div className="flex items-start gap-3">
                    <Building2 className="w-5 h-5 text-muted-foreground mt-0.5" />
                    <div>
                      <p className="text-sm text-muted-foreground">Cliente</p>
                      <p className="font-medium">{project.client}</p>
                    </div>
                  </div>
                )}

                <Separator />

                {/* Fecha de Inicio */}
                <div className="flex items-start gap-3">
                  <Calendar className="w-5 h-5 text-muted-foreground mt-0.5" />
                  <div>
                    <p className="text-sm text-muted-foreground">Fecha de Inicio</p>
                    <p className="font-medium">
                      {new Date(project.startDate).toLocaleDateString('es-ES', { 
                        day: 'numeric', 
                        month: 'long', 
                        year: 'numeric' 
                      })}
                    </p>
                  </div>
                </div>

                <Separator />

                {/* Fecha de Fin */}
                <div className="flex items-start gap-3">
                  <Calendar className="w-5 h-5 text-muted-foreground mt-0.5" />
                  <div>
                    <p className="text-sm text-muted-foreground">Fecha de Fin</p>
                    <p className="font-medium">
                      {new Date(project.endDate).toLocaleDateString('es-ES', { 
                        day: 'numeric', 
                        month: 'long', 
                        year: 'numeric' 
                      })}
                    </p>
                  </div>
                </div>

                <Separator />

                {/* Duración */}
                <div className="flex items-start gap-3">
                  <Calendar className="w-5 h-5 text-muted-foreground mt-0.5" />
                  <div>
                    <p className="text-sm text-muted-foreground">Duración</p>
                    <p className="font-medium">
                      {Math.ceil((new Date(project.endDate).getTime() - new Date(project.startDate).getTime()) / (1000 * 60 * 60 * 24))} días
                    </p>
                  </div>
                </div>
              </CardContent>
            </Card>

            {/* Metadatos */}
            <Card>
              <CardHeader>
                <CardTitle className="text-lg">Metadatos</CardTitle>
              </CardHeader>
              <CardContent className="space-y-3 text-sm">
                <div>
                  <p className="text-muted-foreground">ID del Proyecto</p>
                  <p className="font-mono">{project.id}</p>
                </div>
                <Separator />
                <div>
                  <p className="text-muted-foreground">Referencia</p>
                  <p className="font-mono">{project.ref}</p>
                </div>
                <Separator />
                <div>
                  <p className="text-muted-foreground">Creado</p>
                  <p>
                    {new Date(project.createdAt).toLocaleDateString('es-ES', { 
                      day: 'numeric', 
                      month: 'short', 
                      year: 'numeric' 
                    })}
                  </p>
                </div>
                <Separator />
                <div>
                  <p className="text-muted-foreground">Última Actualización</p>
                  <p>
                    {new Date(project.updatedAt).toLocaleDateString('es-ES', { 
                      day: 'numeric', 
                      month: 'short', 
                      year: 'numeric' 
                    })}
                  </p>
                </div>
              </CardContent>
            </Card>
          </div>
        </div>
      </main>
    </div>
  );
}