"use client";

import { useState, useCallback, useEffect } from "react";
import {
  Link2,
  Clock,
  Calendar,
  User,
  Share2,
  Check,
} from "lucide-react";
import { Button } from "@/components/ui/button";
import {
  Tooltip,
  TooltipContent,
  TooltipProvider,
  TooltipTrigger,
} from "@/components/ui/tooltip";
import { cn } from "@/lib/utils";

export interface BlogPostMetaProps {
  /** Path (e.g. /blog/slug). Full URL is built on client for share/copy. */
  url: string;
  title: string;
  readingTimeMinutes: number;
  /** Shamsi publish date (e.g. "۱۴۰۳/۰۸/۱۵") */
  date?: string | null;
  /** ISO date for <time dateTime> */
  dateTime?: string | null;
  modifiedDate?: string | null;
  authorName?: string | null;
  className?: string;
}

export function BlogPostMeta({
  url,
  title,
  readingTimeMinutes,
  date,
  dateTime,
  modifiedDate,
  authorName,
  className,
}: BlogPostMetaProps) {
  const [copied, setCopied] = useState(false);
  const [shared, setShared] = useState(false);
  const [fullUrl, setFullUrl] = useState(url);
  const [canNativeShare, setCanNativeShare] = useState(false);

  useEffect(() => {
    if (url.startsWith("/")) {
      setFullUrl(window.location.origin + url);
    } else {
      setFullUrl(url);
    }
    setCanNativeShare(Boolean(typeof navigator !== "undefined" && navigator.share));
  }, [url]);

  const copyLink = useCallback(async () => {
    try {
      await navigator.clipboard.writeText(fullUrl);
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {
      setCopied(false);
    }
  }, [fullUrl]);

  const handleShare = useCallback(async () => {
    if (typeof navigator !== "undefined" && navigator.share) {
      try {
        await navigator.share({
          title,
          url: fullUrl,
          text: title,
        });
        setShared(true);
        setTimeout(() => setShared(false), 2000);
      } catch (err) {
        if ((err as Error).name !== "AbortError") copyLink();
      }
    } else {
      copyLink();
    }
  }, [title, fullUrl, copyLink]);

  return (
    <TooltipProvider delayDuration={300}>
      <div
        className={cn(
          "flex flex-wrap items-center gap-x-5 gap-y-2 text-sm text-muted-foreground",
          className
        )}
      >
        {/* Reading time */}
        <span className="inline-flex items-center gap-1.5">
          <Clock className="size-4 shrink-0" aria-hidden />
          <span>
            {readingTimeMinutes === 1
              ? "۱ دقیقه مطالعه"
              : `${readingTimeMinutes.toLocaleString("fa-IR")} دقیقه مطالعه`}
          </span>
        </span>

        {/* Publish date */}
        {date && (
          <time
            className="inline-flex items-center gap-1.5"
            dateTime={dateTime ?? undefined}
          >
            <Calendar className="size-4 shrink-0" aria-hidden />
            <span>انتشار: {date}</span>
          </time>
        )}

        {/* Last updated */}
        {modifiedDate && (
          <span className="inline-flex items-center gap-1.5">
            <Calendar className="size-4 shrink-0" aria-hidden />
            <span>آخرین بروزرسانی: {modifiedDate}</span>
          </span>
        )}

        {/* Author */}
        {authorName && (
          <span className="inline-flex items-center gap-1.5">
            <User className="size-4 shrink-0" aria-hidden />
            <span>{authorName}</span>
          </span>
        )}

        {/* Divider + actions */}
        <span className="mr-auto inline-flex items-center gap-1">
          <span
            className="hidden sm:inline h-4 w-px bg-border ml-2"
            aria-hidden
          />
          <Tooltip>
            <TooltipTrigger asChild>
              <Button
                variant="ghost"
                size="icon-sm"
                className="size-8 text-muted-foreground hover:text-foreground"
                onClick={copyLink}
                aria-label="کپی لینک"
              >
                {copied ? (
                  <Check className="size-4 text-green-600" />
                ) : (
                  <Link2 className="size-4" />
                )}
              </Button>
            </TooltipTrigger>
            <TooltipContent side="bottom">
              {copied ? "کپی شد" : "کپی لینک"}
            </TooltipContent>
          </Tooltip>
          <Tooltip>
            <TooltipTrigger asChild>
              <Button
                variant="ghost"
                size="icon-sm"
                className="size-8 text-muted-foreground hover:text-foreground"
                onClick={handleShare}
                aria-label="اشتراک‌گذاری"
              >
                {shared ? (
                  <Check className="size-4 text-green-600" />
                ) : (
                  <Share2 className="size-4" />
                )}
              </Button>
            </TooltipTrigger>
            <TooltipContent side="bottom">
              {shared ? "اشتراک گذاشته شد" : canNativeShare ? "اشتراک‌گذاری" : "کپی لینک"}
            </TooltipContent>
          </Tooltip>
        </span>
      </div>
    </TooltipProvider>
  );
}