"use client";

import { useActionState, useEffect } from "react";
import { CircleNotch } from '@/lib/icons';
import { toast } from "sonner";

import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Textarea } from "@/components/ui/textarea";
import { ResponsiveSheet, FormWizard } from "@/components/ui/responsive-sheet";
import { createCustomerAction, updateCustomerAction } from "@/lib/appwrite/customer-actions";
import type { Customer } from "@/lib/appwrite/schema";
import { CUSTOMER_STAGE_LABELS, CUSTOMER_SOURCE_LABELS } from "@/lib/appwrite/schema";

type ActionState = { ok: boolean; error?: string; fieldErrors?: Record<string, string[]> };
const INITIAL: ActionState = { ok: false };

interface CustomerFormSheetProps {
  open: boolean;
  onOpenChange: (v: boolean) => void;
  customer?: Customer | null;
  onSuccess?: () => void;
}

export function CustomerFormSheet({ open, onOpenChange, customer, onSuccess }: CustomerFormSheetProps) {
  const action = customer
    ? updateCustomerAction.bind(null, customer.$id)
    : createCustomerAction;

  const [state, formAction, isPending] = useActionState(action, INITIAL);

  useEffect(() => {
    if (state.ok) {
      toast.success(customer ? "Müşteri güncellendi." : "Müşteri oluşturuldu.");
      onSuccess?.();
      onOpenChange(false);
    } else if (state.error) {
      toast.error(state.error);
    }
  }, [state]);

  const fe = state.fieldErrors ?? {};

  const steps = [
    {
      label: "Kimlik",
      content: (
        <>
          <div className="grid gap-1.5">
            <Label htmlFor="name">Ad Soyad *</Label>
            <Input id="name" name="name" defaultValue={customer?.name} placeholder="Ahmet Yılmaz" />
            {fe.name && <p className="text-destructive text-xs">{fe.name[0]}</p>}
          </div>
          <div className="grid grid-cols-2 gap-3">
            <div className="grid gap-1.5">
              <Label>Müşteri tipi *</Label>
              <select name="type" defaultValue={customer?.type ?? "alici"}
                className="border-input bg-background h-9 rounded-md border px-3 text-sm">
                <option value="alici">Alıcı</option>
                <option value="kiraci">Kiracı</option>
                <option value="yatirimci">Yatırımcı</option>
              </select>
              {fe.type && <p className="text-destructive text-xs">{fe.type[0]}</p>}
            </div>
            <div className="grid gap-1.5">
              <Label>Aşama</Label>
              <select name="stage" defaultValue={customer?.stage ?? "ilk_temas"}
                className="border-input bg-background h-9 rounded-md border px-3 text-sm">
                {Object.entries(CUSTOMER_STAGE_LABELS).map(([v, l]) => (
                  <option key={v} value={v}>{l}</option>
                ))}
              </select>
            </div>
          </div>
        </>
      ),
    },
    {
      label: "İletişim",
      content: (
        <>
          <div className="grid grid-cols-2 gap-3">
            <div className="grid gap-1.5">
              <Label htmlFor="phone">Telefon</Label>
              <Input id="phone" name="phone" type="tel" defaultValue={customer?.phone ?? ""} placeholder="+90 555 123 45 67" />
            </div>
            <div className="grid gap-1.5">
              <Label htmlFor="email">Email</Label>
              <Input id="email" name="email" type="email" defaultValue={customer?.email ?? ""} placeholder="ahmet@example.com" />
              {fe.email && <p className="text-destructive text-xs">{fe.email[0]}</p>}
            </div>
          </div>
          <div className="grid grid-cols-2 gap-3">
            <div className="grid gap-1.5">
              <Label>Kaynak</Label>
              <select name="source" defaultValue={customer?.source ?? ""}
                className="border-input bg-background h-9 rounded-md border px-3 text-sm">
                <option value="">Seçiniz</option>
                {Object.entries(CUSTOMER_SOURCE_LABELS).map(([v, l]) => (
                  <option key={v} value={v}>{l}</option>
                ))}
              </select>
            </div>
            <div className="grid gap-1.5">
              <Label htmlFor="nextFollowUpDate">Takip tarihi</Label>
              <Input id="nextFollowUpDate" name="nextFollowUpDate" type="date"
                defaultValue={customer?.nextFollowUpDate ? customer.nextFollowUpDate.split("T")[0] : ""} />
            </div>
          </div>
        </>
      ),
    },
    {
      label: "Not",
      content: (
        <div className="grid gap-1.5">
          <Label htmlFor="notes">Notlar</Label>
          <Textarea id="notes" name="notes" rows={4} defaultValue={customer?.notes ?? ""} placeholder="Müşteri hakkında notlar..." />
        </div>
      ),
    },
  ];

  return (
    <ResponsiveSheet
      open={open}
      onOpenChange={onOpenChange}
      title={customer ? "Müşteriyi Düzenle" : "Yeni Müşteri"}
      maxWidth="sm:max-w-lg"
    >
      <form
        action={formAction}
        onKeyDown={(e) => {
          if (e.key === "Enter" && (e.target as HTMLElement).tagName !== "TEXTAREA") {
            e.preventDefault();
          }
        }}
      >
        <FormWizard steps={steps} isPending={isPending} submitLabel={customer ? "Güncelle" : "Oluştur"} />
      </form>
    </ResponsiveSheet>
  );
}