"use client";

import { useState, type FormEvent } from "react";
import { toast } from "sonner";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { Label } from "@/components/ui/label";
import { Textarea } from "@/components/ui/textarea";
import { Loader2Icon } from "lucide-react";

export type NominationActionResult = {
  readonly success: boolean;
  readonly error?: string;
};

interface NominationNoteDialogProps {
  readonly open: boolean;
  readonly onOpenChange: (open: boolean) => void;
  readonly title: string;
  readonly description: string;
  readonly fieldId: string;
  readonly fieldLabel: string;
  readonly placeholder: string;
  readonly submitLabel: string;
  readonly successMessage: string;
  readonly required: boolean;
  readonly submitVariant?: "default" | "destructive" | "outline" | "secondary" | "ghost" | "link";
  readonly onSubmit: (note: string) => Promise<NominationActionResult>;
}

export function NominationNoteDialog({
  open,
  onOpenChange,
  title,
  description,
  fieldId,
  fieldLabel,
  placeholder,
  submitLabel,
  successMessage,
  required,
  submitVariant = "default",
  onSubmit,
}: NominationNoteDialogProps) {
  const [note, setNote] = useState("");
  const [pending, setPending] = useState(false);
  const [error, setError] = useState<string | null>(null);

  function handleOpenChange(nextOpen: boolean) {
    onOpenChange(nextOpen);
    if (!nextOpen) {
      setNote("");
      setError(null);
    }
  }

  async function handleSubmit(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    const trimmedNote = note.trim();
    if (required && !trimmedNote) {
      setError("A reason is required.");
      return;
    }

    setPending(true);
    setError(null);
    try {
      const result = await onSubmit(trimmedNote);
      if (result.success) {
        toast.success(successMessage);
        handleOpenChange(false);
      } else {
        setError(result.error ?? "Could not complete this action.");
      }
    } catch (caughtError) {
      setError(
        caughtError instanceof Error ? caughtError.message : "Could not complete this action.",
      );
    } finally {
      setPending(false);
    }
  }

  return (
    <Dialog open={open} onOpenChange={handleOpenChange}>
      <DialogContent>
        <DialogHeader>
          <DialogTitle>{title}</DialogTitle>
          <DialogDescription>{description}</DialogDescription>
        </DialogHeader>
        <form className="flex flex-col gap-4" onSubmit={(event) => void handleSubmit(event)}>
          <div className="flex flex-col gap-1.5">
            <Label htmlFor={fieldId}>
              {fieldLabel}
              {required ? " *" : " (optional)"}
            </Label>
            <Textarea
              id={fieldId}
              value={note}
              onChange={(event) => setNote(event.target.value)}
              placeholder={placeholder}
              rows={4}
              required={required}
              disabled={pending}
            />
          </div>

          {error && (
            <p role="alert" className="text-sm text-destructive">
              {error}
            </p>
          )}

          <DialogFooter>
            <Button
              type="button"
              variant="outline"
              onClick={() => handleOpenChange(false)}
              disabled={pending}
            >
              Cancel
            </Button>
            <Button type="submit" variant={submitVariant} disabled={pending}>
              {pending && <Loader2Icon data-icon="inline-start" className="animate-spin" />}
              {pending ? "Submitting..." : submitLabel}
            </Button>
          </DialogFooter>
        </form>
      </DialogContent>
    </Dialog>
  );
}