"use client";

import { useActionState, useEffect } from "react";
import { Loader2, Save } from "lucide-react";
import { toast } from "sonner";

import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import {
  Sheet,
  SheetContent,
  SheetDescription,
  SheetFooter,
  SheetHeader,
  SheetTitle,
} from "@/components/ui/sheet";
import { Switch } from "@/components/ui/switch";
import { Textarea } from "@/components/ui/textarea";
import {
  createServiceAction,
  updateServiceAction,
} from "@/lib/appwrite/service-actions";
import { initialServiceState } from "@/lib/appwrite/service-types";
import type { CustomerOption, ServiceRow } from "./types";

type Props = {
  open: boolean;
  onOpenChange: (v: boolean) => void;
  service?: ServiceRow | null;
  customers: CustomerOption[];
  defaultCustomerId?: string;
};

export function ServiceFormSheet({
  open,
  onOpenChange,
  service,
  customers,
  defaultCustomerId,
}: Props) {
  const isEdit = Boolean(service);
  const action = isEdit ? updateServiceAction : createServiceAction;
  const [state, formAction, isPending] = useActionState(action, initialServiceState);

  useEffect(() => {
    if (state.ok) {
      toast.success(isEdit ? "Hizmet güncellendi." : "Hizmet eklendi.");
      onOpenChange(false);
    } else if (state.error) {
      toast.error(state.error);
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [state]);

  return (
    <Sheet open={open} onOpenChange={onOpenChange}>
      <SheetContent className="flex w-full flex-col gap-0 p-0 sm:max-w-xl">
        <SheetHeader className="border-b px-6 py-4">
          <SheetTitle>{isEdit ? "Hizmeti düzenle" : "Yeni hizmet"}</SheetTitle>
          <SheetDescription>
            {customers.length === 0
              ? "Hizmet eklemek için önce en az bir müşteri tanımlamalısınız."
              : "Müşteriye sunduğunuz hizmeti tanımlayın."}
          </SheetDescription>
        </SheetHeader>

        <form action={formAction} className="flex flex-1 flex-col">
          {isEdit && service && <input type="hidden" name="id" value={service.id} />}

          <div className="flex-1 space-y-4 overflow-y-auto px-6 py-5">
            <div className="grid gap-2">
              <Label htmlFor="customerId">Müşteri *</Label>
              <Select
                name="customerId"
                defaultValue={service?.customerId ?? defaultCustomerId ?? ""}
                disabled={customers.length === 0}
              >
                <SelectTrigger id="customerId">
                  <SelectValue placeholder="Müşteri seçin" />
                </SelectTrigger>
                <SelectContent>
                  {customers.map((c) => (
                    <SelectItem key={c.id} value={c.id}>
                      {c.name}
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
              {state.fieldErrors?.customerId && (
                <p className="text-destructive text-xs">{state.fieldErrors.customerId}</p>
              )}
            </div>

            <div className="grid gap-2">
              <Label htmlFor="name">Hizmet adı *</Label>
              <Input
                id="name"
                name="name"
                defaultValue={service?.name ?? ""}
                placeholder="Örn. Web hosting bakımı"
                required
              />
              {state.fieldErrors?.name && (
                <p className="text-destructive text-xs">{state.fieldErrors.name}</p>
              )}
            </div>

            <div className="grid gap-2">
              <Label htmlFor="description">Açıklama</Label>
              <Textarea
                id="description"
                name="description"
                rows={3}
                defaultValue={service?.description ?? ""}
                placeholder="Hizmetin kapsamı, sınırları, vb."
              />
            </div>

            <div className="grid gap-4 md:grid-cols-2">
              <div className="grid gap-2">
                <Label htmlFor="unitPrice">Birim fiyat (₺) *</Label>
                <Input
                  id="unitPrice"
                  name="unitPrice"
                  type="number"
                  step="0.01"
                  min="0"
                  defaultValue={service?.unitPrice ?? ""}
                  placeholder="0.00"
                  required
                />
                {state.fieldErrors?.unitPrice && (
                  <p className="text-destructive text-xs">{state.fieldErrors.unitPrice}</p>
                )}
              </div>
              <div className="grid gap-2">
                <Label htmlFor="billingPeriod">Faturalama dönemi</Label>
                <Select
                  name="billingPeriod"
                  defaultValue={service?.billingPeriod ?? "onetime"}
                >
                  <SelectTrigger id="billingPeriod">
                    <SelectValue />
                  </SelectTrigger>
                  <SelectContent>
                    <SelectItem value="onetime">Tek seferlik</SelectItem>
                    <SelectItem value="monthly">Aylık</SelectItem>
                    <SelectItem value="yearly">Yıllık</SelectItem>
                  </SelectContent>
                </Select>
              </div>
            </div>

            <div className="flex items-center justify-between rounded-md border p-3">
              <div className="grid gap-0.5">
                <Label htmlFor="recurring" className="cursor-pointer">
                  Tekrarlayan hizmet
                </Label>
                <p className="text-muted-foreground text-xs">
                  Bu hizmet düzenli olarak fatura kesilecek mi?
                </p>
              </div>
              <Switch id="recurring" name="recurring" defaultChecked={service?.recurring} />
            </div>
          </div>

          <SheetFooter className="border-t bg-muted/30 px-6 pt-4">
            <div className="flex w-full justify-end gap-2">
              <Button
                type="button"
                variant="outline"
                onClick={() => onOpenChange(false)}
                disabled={isPending}
              >
                Vazgeç
              </Button>
              <Button type="submit" disabled={isPending || customers.length === 0}>
                {isPending ? (
                  <>
                    <Loader2 className="size-4 animate-spin" />
                    Kaydediliyor...
                  </>
                ) : (
                  <>
                    <Save className="size-4" />
                    {isEdit ? "Güncelle" : "Kaydet"}
                  </>
                )}
              </Button>
            </div>
          </SheetFooter>
        </form>
      </SheetContent>
    </Sheet>
  );
}