"use client";

import * as React from "react";
import {
  Avatar,
  AvatarFallback,
  AvatarImage,
} from "@/components/ui/avatar/radix";
import { Badge } from "@/components/ui/badge/radix";
import { Button } from "@/components/ui/button/radix";
import {
  Kanban,
  KanbanBoard,
  KanbanColumn,
  KanbanColumnContent,
  KanbanColumnHandle,
  KanbanItem,
  KanbanItemHandle,
  KanbanOverlay,
} from "@/components/ui/kanban";
import { GripVertical } from "lucide-react";

interface Task {
  id: string;
  title: string;
  priority: "low" | "medium" | "high";
  description?: string;
  assignee?: string;
  assigneeAvatar?: string;
  dueDate?: string;
}

const COLUMN_TITLES: Record<string, string> = {
  backlog: "Backlog",
  inProgress: "In Progress",
  review: "Review",
  done: "Done",
};

interface TaskCardProps extends Omit<
  React.ComponentProps<typeof KanbanItem>,
  "value" | "children"
> {
  task: Task;
  asHandle?: boolean;
}

function TaskCard({ task, asHandle, ...props }: TaskCardProps) {
  const cardContent = (
    <div className="rounded-md border bg-card p-3 shadow-xs">
      <div className="flex flex-col gap-2.5">
        <div className="flex items-center justify-between gap-2">
          <span className="line-clamp-1 font-medium text-sm">{task.title}</span>
          <Badge
            variant={
              task.priority === "high"
                ? "destructive"
                : task.priority === "medium"
                  ? "primary"
                  : "warning"
            }
            appearance="outline"
            className="pointer-events-none h-5 rounded-sm px-1.5 text-[11px] capitalize shrink-0"
          >
            {task.priority}
          </Badge>
        </div>
        <div className="flex items-center justify-between text-muted-foreground text-xs">
          {task.assignee && (
            <div className="flex items-center gap-1">
              <Avatar className="size-4">
                <AvatarImage src={task.assigneeAvatar || ""} alt="sd" />
                <AvatarFallback>{task.assignee.charAt(0)}</AvatarFallback>
              </Avatar>
              <span className="line-clamp-1">{task.assignee}</span>
            </div>
          )}
          {task.dueDate && (
            <time className="text-[10px] tabular-nums whitespace-nowrap">
              {task.dueDate}
            </time>
          )}
        </div>
      </div>
    </div>
  );

  return (
    <KanbanItem value={task.id} {...props}>
      {asHandle ? (
        <KanbanItemHandle>{cardContent}</KanbanItemHandle>
      ) : (
        cardContent
      )}
    </KanbanItem>
  );
}

interface TaskColumnProps extends Omit<
  React.ComponentProps<typeof KanbanColumn>,
  "children"
> {
  tasks: Task[];
  isOverlay?: boolean;
}

function TaskColumn({ value, tasks, isOverlay, ...props }: TaskColumnProps) {
  return (
    <KanbanColumn
      value={value}
      {...props}
      className="rounded-md border bg-card p-2.5 shadow-xs"
    >
      <div className="flex items-center justify-between mb-2.5">
        <div className="flex items-center gap-2.5">
          <span className="font-semibold text-sm">{COLUMN_TITLES[value]}</span>
          <Badge variant="secondary">{tasks.length}</Badge>
        </div>
        <KanbanColumnHandle asChild>
          <Button variant="outline" size="icon-sm">
            <GripVertical />
          </Button>
        </KanbanColumnHandle>
      </div>
      <KanbanColumnContent
        value={value}
        className="flex flex-col gap-2.5 p-0.5"
      >
        {tasks.map((task) => (
          <TaskCard key={task.id} task={task} asHandle={!isOverlay} />
        ))}
      </KanbanColumnContent>
    </KanbanColumn>
  );
}

export default function Component() {
  const [columns, setColumns] = React.useState<Record<string, Task[]>>({
    backlog: [
      {
        id: "1",
        title: "Add authentication",
        priority: "high",
        assignee: "John Doe",
        assigneeAvatar: "https://randomuser.me/api/portraits/men/1.jpg",
        dueDate: "Jan 10, 2025",
      },
      {
        id: "2",
        title: "Create API endpoints",
        priority: "medium",
        assignee: "Jane Smith",
        assigneeAvatar: "https://randomuser.me/api/portraits/women/2.jpg",
        dueDate: "Jan 15, 2025",
      },
      {
        id: "3",
        title: "Write documentation",
        priority: "low",
        assignee: "Bob Johnson",
        assigneeAvatar: "https://randomuser.me/api/portraits/men/3.jpg",
        dueDate: "Jan 20, 2025",
      },
    ],
    inProgress: [
      {
        id: "4",
        title: "Design system updates",
        priority: "high",
        assignee: "Alice Brown",
        assigneeAvatar: "https://randomuser.me/api/portraits/women/4.jpg",
        dueDate: "Aug 25, 2025",
      },
      {
        id: "5",
        title: "Implement dark mode",
        priority: "medium",
        assignee: "Charlie Wilson",
        assigneeAvatar: "https://randomuser.me/api/portraits/men/5.jpg",
        dueDate: "Aug 25, 2025",
      },
    ],
    done: [
      {
        id: "7",
        title: "Setup project",
        priority: "high",
        assignee: "Eve Davis",
        assigneeAvatar: "https://randomuser.me/api/portraits/women/6.jpg",
        dueDate: "Sep 25, 2025",
      },
      {
        id: "8",
        title: "Initial commit",
        priority: "low",
        assignee: "Frank White",
        assigneeAvatar: "https://randomuser.me/api/portraits/men/7.jpg",
        dueDate: "Sep 20, 2025",
      },
    ],
  });

  return (
    <Kanban
      value={columns}
      onValueChange={setColumns}
      getItemValue={(item) => item.id}
    >
      <KanbanBoard className="grid auto-rows-fr grid-cols-3">
        {Object.entries(columns).map(([columnValue, tasks]) => (
          <TaskColumn key={columnValue} value={columnValue} tasks={tasks} />
        ))}
      </KanbanBoard>
      <KanbanOverlay>
        {({ value, variant }) => {
          if (variant === "column") {
            const tasks = columns[value] ?? [];
            return <TaskColumn value={String(value)} tasks={tasks} isOverlay />;
          }

          const task = Object.values(columns)
            .flat()
            .find((task) => task.id === value);

          if (!task) return null;

          return <TaskCard task={task} />;
        }}
      </KanbanOverlay>
    </Kanban>
  );
}
Kanban Pattern

Default

Overlay

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