import { AlertCircleIcon, CheckIcon, ClockIcon } from "lucide-react";
import { useState } from "react";

import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Spinner } from "@/components/ui/spinner";
import type { AutosaveState } from "@/hooks/use-autosave";

export function AutosaveStatus({
  state,
  issues = [],
  onSave,
  conflictVersion,
  canOverwrite = false,
  onReloadLatest,
  onOverwrite,
}: {
  state: AutosaveState;
  issues?: readonly string[];
  onSave?: () => void;
  conflictVersion?: number | null;
  canOverwrite?: boolean;
  onReloadLatest?: () => void;
  onOverwrite?: () => void;
}) {
  const [showIssues, setShowIssues] = useState(false);

  if (state === "saving")
    return (
      <Badge variant="secondary">
        <Spinner data-icon="inline-start" />
        Saving…
      </Badge>
    );
  if (state === "unsaved")
    return (
      <Badge variant="outline">
        <ClockIcon data-icon="inline-start" />
        Waiting to save…
      </Badge>
    );
  if (state === "incomplete")
    return (
      <div className="flex flex-col items-end gap-2">
        <Button
          type="button"
          variant="outline"
          size="sm"
          onClick={() => setShowIssues((current) => !current)}
          aria-expanded={showIssues}
        >
          <AlertCircleIcon data-icon="inline-start" />
          {showIssues ? "ซ่อนรายการ" : "ตรวจสอบข้อมูลที่ยังไม่ครบ"}
        </Button>
        {showIssues ? (
          <Alert variant="destructive" className="max-w-md">
            <AlertCircleIcon aria-hidden="true" />
            <AlertTitle>กรุณากรอกข้อมูลให้ครบ</AlertTitle>
            <AlertDescription>
              <div className="flex flex-col gap-2">
                <p>
                  แก้ไขรายการด้านล่าง แล้วระบบจะบันทึกให้อัตโนมัติ
                  ข้อมูลที่กรอกไว้ยังไม่หาย
                </p>
                {issues.length ? (
                  <ul className="flex flex-col gap-1">
                    {issues.map((issue, index) => (
                      <li key={`${issue}-${index}`}>{issue}</li>
                    ))}
                  </ul>
                ) : null}
              </div>
            </AlertDescription>
          </Alert>
        ) : null}
      </div>
    );
  if (state === "conflict")
    return (
      <Alert
        id="autosave-conflict"
        variant="destructive"
        className="max-w-xl scroll-m-6"
      >
        <AlertCircleIcon aria-hidden="true" />
        <AlertTitle>มีการบันทึกข้อมูลใหม่จากผู้แก้ไขคนอื่น</AlertTitle>
        <AlertDescription>
          <div className="flex flex-col gap-3">
            <p>
              ระบบหยุด Autosave ไว้เพื่อไม่ให้ Draft นี้เขียนทับข้อมูลล่าสุด
              {conflictVersion ? ` (version ${conflictVersion})` : ""}
            </p>
            <div className="flex flex-wrap gap-2">
              {onReloadLatest ? (
                <Button
                  type="button"
                  variant="outline"
                  size="sm"
                  onClick={onReloadLatest}
                >
                  โหลดข้อมูลล่าสุด
                </Button>
              ) : null}
              {onOverwrite ? (
                <Button
                  type="button"
                  variant="destructive"
                  size="sm"
                  disabled={!canOverwrite}
                  onClick={onOverwrite}
                >
                  เขียนทับด้วย Draft นี้
                </Button>
              ) : null}
            </div>
          </div>
        </AlertDescription>
      </Alert>
    );
  if (state === "error")
    return (
      <div className="flex items-center gap-2">
        <Badge variant="destructive">
          <AlertCircleIcon data-icon="inline-start" />
          Autosave failed
        </Badge>
        {onSave ? (
          <Button type="button" variant="outline" size="sm" onClick={onSave}>
            Save now
          </Button>
        ) : null}
      </div>
    );
  return (
    <Badge variant="secondary">
      <CheckIcon data-icon="inline-start" />
      Saved
    </Badge>
  );
}