/**
 * RecentProjects Component
 *
 * Displays recent projects in a responsive grid with a "View all" link.
 * Shows 3 projects on mobile, 6 on desktop.
 *
 * @see Issue #53
 */

'use client';

import { ArrowRight, Bot, CircleDot, Clock } from 'lucide-react';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Skeleton } from '@/components/ui/skeleton';
import { Link } from '@/lib/i18n/routing';
import { cn } from '@/lib/utils';
import { ProjectStatusBadge } from '@/components/projects/StatusBadge';
import { ProgressBar } from '@/components/projects/ProgressBar';
import type { DashboardProject } from '@/lib/api/hooks/useDashboard';

export interface RecentProjectsProps {
  /** Projects to display */
  projects?: DashboardProject[];
  /** Whether data is loading */
  isLoading?: boolean;
  /** Additional CSS classes */
  className?: string;
}

function ProjectCardSkeleton() {
  return (
    <Card className="animate-pulse">
      <CardHeader className="pb-3">
        <div className="flex items-center justify-between">
          <Skeleton className="h-5 w-20" />
          <Skeleton className="h-5 w-16" />
        </div>
        <Skeleton className="mt-2 h-6 w-3/4" />
      </CardHeader>
      <CardContent className="space-y-3">
        <Skeleton className="h-4 w-full" />
        <Skeleton className="h-2 w-full" />
        <div className="flex justify-between">
          <Skeleton className="h-4 w-20" />
          <Skeleton className="h-4 w-16" />
        </div>
      </CardContent>
    </Card>
  );
}

interface ProjectCardProps {
  project: DashboardProject;
}

function ProjectCard({ project }: ProjectCardProps) {
  return (
    <Link href={`/projects/${project.id}`} className="block">
      <Card className="h-full cursor-pointer transition-all hover:border-primary hover:shadow-md">
        <CardHeader className="pb-3">
          <div className="flex items-center justify-between">
            <ProjectStatusBadge status={project.status} />
            {project.currentSprint && (
              <Badge variant="outline" className="text-xs">
                {project.currentSprint}
              </Badge>
            )}
          </div>
          <CardTitle className="mt-2 line-clamp-1 text-lg">{project.name}</CardTitle>
        </CardHeader>
        <CardContent className="space-y-3">
          {project.description && (
            <p className="line-clamp-2 text-sm text-muted-foreground">{project.description}</p>
          )}

          <ProgressBar value={project.progress} size="sm" showLabel />

          <div className="flex items-center justify-between text-xs text-muted-foreground">
            <div className="flex items-center gap-3">
              <span className="flex items-center gap-1">
                <Bot className="h-3 w-3" />
                {project.activeAgents} agents
              </span>
              <span className="flex items-center gap-1">
                <CircleDot className="h-3 w-3" />
                {project.openIssues} issues
              </span>
            </div>
            <span className="flex items-center gap-1">
              <Clock className="h-3 w-3" />
              {project.lastActivity}
            </span>
          </div>
        </CardContent>
      </Card>
    </Link>
  );
}

export function RecentProjects({ projects, isLoading = false, className }: RecentProjectsProps) {
  // Show first 3 on mobile (hidden beyond), 6 on desktop
  const displayProjects = projects?.slice(0, 6) ?? [];

  return (
    <div className={className}>
      <div className="mb-4 flex items-center justify-between">
        <h2 className="text-xl font-semibold">Recent Projects</h2>
        <Button variant="ghost" size="sm" asChild>
          <Link href="/projects" className="gap-1">
            View all
            <ArrowRight className="h-4 w-4" />
          </Link>
        </Button>
      </div>

      {isLoading ? (
        <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
          {[1, 2, 3, 4, 5, 6].map((i) => (
            <div key={i} className={cn(i > 3 && 'hidden lg:block')}>
              <ProjectCardSkeleton />
            </div>
          ))}
        </div>
      ) : displayProjects.length === 0 ? (
        <Card className="py-8 text-center">
          <CardContent>
            <p className="text-muted-foreground">No projects yet</p>
            <Button asChild className="mt-4">
              <Link href="/projects/new">Create your first project</Link>
            </Button>
          </CardContent>
        </Card>
      ) : (
        <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
          {displayProjects.map((project, index) => (
            <div key={project.id} className={cn(index >= 3 && 'hidden lg:block')}>
              <ProjectCard project={project} />
            </div>
          ))}
        </div>
      )}
    </div>
  );
}
