import Link from "next/link";
import { Inbox, ArrowRight } from "lucide-react";

import { Card, CardContent, CardHeader, CardTitle } from "@/shared/components/ui/card";
import { Avatar, AvatarFallback, AvatarImage } from "@/shared/components/ui/avatar";
import { Badge } from "@/shared/components/ui/badge";
import { Button } from "@/shared/components/ui/button";
import { EmptyState } from "@/shared/components/ui/empty-state";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/shared/components/ui/table";
import { formatDate } from "@/shared/lib/utils";
import type { HomeworkSubmissionListItem } from "@/modules/homework/types";

export function RecentSubmissions({ 
  submissions,
  title = "Recent Submissions",
  emptyTitle = "No New Submissions",
  emptyDescription = "All caught up! There are no new submissions to review."
}: { 
  submissions: HomeworkSubmissionListItem[],
  title?: string,
  emptyTitle?: string,
  emptyDescription?: string
}) {
  const hasSubmissions = submissions.length > 0;

  return (
    <Card className="h-full flex flex-col">
      <CardHeader className="flex flex-row items-center justify-between pb-2">
        <CardTitle className="flex items-center gap-2 text-lg">
          <Inbox className="h-5 w-5 text-primary" />
          {title}
        </CardTitle>
        <Button variant="ghost" size="sm" className="text-muted-foreground hover:text-primary" asChild>
          <Link href="/teacher/homework/submissions" className="flex items-center gap-1">
            View All <ArrowRight className="h-3 w-3" />
          </Link>
        </Button>
      </CardHeader>
      <CardContent className="flex-1">
        {!hasSubmissions ? (
           <EmptyState
             icon={Inbox}
             title={emptyTitle}
             description={emptyDescription}
             action={{ label: "View submissions", href: "/teacher/homework/submissions" }}
             className="border-none h-full min-h-[200px]"
           />
        ) : (
          <div className="rounded-md border">
            <Table>
              <TableHeader>
                <TableRow className="bg-muted/50">
                  <TableHead className="w-[200px]">Student</TableHead>
                  <TableHead>Assignment</TableHead>
                  <TableHead className="w-[140px]">Submitted</TableHead>
                  <TableHead className="w-[100px] text-right">Action</TableHead>
                </TableRow>
              </TableHeader>
              <TableBody>
                {submissions.map((item) => (
                  <TableRow key={item.id} className="hover:bg-muted/50">
                    <TableCell>
                      <div className="flex items-center gap-3">
                        <Avatar className="h-8 w-8 border">
                          <AvatarImage src={undefined} alt={item.studentName} />
                          <AvatarFallback className="bg-primary/10 text-primary text-xs">
                            {item.studentName.charAt(0)}
                          </AvatarFallback>
                        </Avatar>
                        <span className="font-medium text-sm">{item.studentName}</span>
                      </div>
                    </TableCell>
                    <TableCell>
                      <Link 
                        href={`/teacher/homework/submissions/${item.id}`}
                        className="font-medium hover:text-primary hover:underline transition-colors block truncate max-w-[240px]"
                        title={item.assignmentTitle}
                      >
                        {item.assignmentTitle}
                      </Link>
                    </TableCell>
                    <TableCell>
                      <div className="flex flex-col gap-1">
                        <span className="text-xs text-muted-foreground">
                          {item.submittedAt ? formatDate(item.submittedAt) : "-"}
                        </span>
                        {item.isLate && (
                          <Badge variant="destructive" className="w-fit text-[10px] h-4 px-1.5 font-normal">
                            Late
                          </Badge>
                        )}
                      </div>
                    </TableCell>
                    <TableCell className="text-right">
                      <Button size="sm" variant="secondary" className="h-8 px-3" asChild>
                        <Link href={`/teacher/homework/submissions/${item.id}`}>
                          Grade
                        </Link>
                      </Button>
                    </TableCell>
                  </TableRow>
                ))}
              </TableBody>
            </Table>
          </div>
        )}
      </CardContent>
    </Card>
  );
}