"use client";

import type { Task } from "@mosaic/shared";
import { TaskPriority } from "@mosaic/shared";
import { useSortable } from "@dnd-kit/sortable";
import { CSS } from "@dnd-kit/utilities";
import { Calendar, Flag } from "lucide-react";
import { format } from "date-fns";

interface TaskCardProps {
  task: Task;
}

const priorityConfig = {
  [TaskPriority.HIGH]: {
    label: "High",
    className: "bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400",
  },
  [TaskPriority.MEDIUM]: {
    label: "Medium",
    className: "bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-400",
  },
  [TaskPriority.LOW]: {
    label: "Low",
    className: "bg-gray-100 text-gray-700 dark:bg-gray-800 dark:text-gray-400",
  },
};

export function TaskCard({ task }: TaskCardProps) {
  const {
    attributes,
    listeners,
    setNodeRef,
    transform,
    transition,
    isDragging,
  } = useSortable({ id: task.id });

  const style = {
    transform: CSS.Transform.toString(transform),
    transition,
  };

  const isOverdue =
    task.dueDate &&
    new Date(task.dueDate) < new Date() &&
    task.status !== "COMPLETED";

  const isDueSoon =
    task.dueDate &&
    !isOverdue &&
    new Date(task.dueDate).getTime() - new Date().getTime() <
      3 * 24 * 60 * 60 * 1000; // 3 days

  const priorityInfo = priorityConfig[task.priority];

  return (
    <article
      ref={setNodeRef}
      style={style}
      {...attributes}
      {...listeners}
      className={`
        bg-white dark:bg-gray-800 
        rounded-lg shadow-sm border border-gray-200 dark:border-gray-700
        p-4 space-y-3
        cursor-grab active:cursor-grabbing
        transition-all duration-200
        hover:shadow-md hover:border-gray-300 dark:hover:border-gray-600
        ${isDragging ? "opacity-50" : "opacity-100"}
      `}
    >
      {/* Task Title */}
      <h4 className="text-sm font-medium text-gray-900 dark:text-gray-100 line-clamp-2">
        {task.title}
      </h4>

      {/* Task Metadata */}
      <div className="flex items-center gap-2 flex-wrap">
        {/* Priority Badge */}
        <span
          data-priority={task.priority}
          className={`
            inline-flex items-center gap-1 px-2 py-1 rounded-md text-xs font-medium
            ${priorityInfo.className}
          `}
        >
          <Flag className="w-3 h-3" aria-hidden="true" />
          {priorityInfo.label}
        </span>

        {/* Due Date */}
        {task.dueDate && (
          <span
            className={`
              inline-flex items-center gap-1 px-2 py-1 rounded-md text-xs
              ${
                isOverdue
                  ? "bg-amber-100 text-amber-700 dark:bg-amber-900/30 dark:text-amber-400"
                  : isDueSoon
                    ? "bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400"
                    : "bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-400"
              }
            `}
          >
            <Calendar className="w-3 h-3" aria-label="Due date" />
            {format(new Date(task.dueDate), "MMM d")}
          </span>
        )}
      </div>
    </article>
  );
}