"use client";

import React, { useState } from "react";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Textarea } from "@/components/ui/textarea";
import { Icon } from "@/components/ui/icon";
import { useTranslations } from "next-intl";
import { FormField } from "@/components/auth/form-field";
import { 
  ProfileFormProps,
  RegistrationFormData,
  InstituteData,
  UserCategory,
  registrationSchema
} from "@/types/registration";
import { useLocationData, useInstituteData, useRegistration } from "@/hooks/use-registration";
import { validatePassword } from "@/lib/registration-utils";
import dynamic from "next/dynamic";

const PasswordChecklist = dynamic(() => import("react-password-checklist"), {
  ssr: false,
});

export const ProfileForm: React.FC<ProfileFormProps> = ({
  userData,
  category,
  onSuccess,
  onError,
  className,
}) => {
  const t = useTranslations("LandingPage");
  const { submitRegistration, loading: submitLoading } = useRegistration();
  const { provinces, cities, districts, fetchCities, fetchDistricts, loading: locationLoading } = useLocationData();
  const { institutes, saveInstitute, loading: instituteLoading } = useInstituteData(Number(category));
  
  const [selectedProvince, setSelectedProvince] = useState("");
  const [selectedCity, setSelectedCity] = useState("");
  const [selectedDistrict, setSelectedDistrict] = useState("");
  const [selectedInstitute, setSelectedInstitute] = useState("");
  const [isCustomInstitute, setIsCustomInstitute] = useState(false);
  const [customInstituteName, setCustomInstituteName] = useState("");
  const [instituteAddress, setInstituteAddress] = useState("");
  const [password, setPassword] = useState("");
  const [passwordConf, setPasswordConf] = useState("");
  const [showPassword, setShowPassword] = useState(false);
  const [showPasswordConf, setShowPasswordConf] = useState(false);

  const {
    register,
    handleSubmit,
    formState: { errors, isSubmitting },
    setValue,
    watch,
  } = useForm<RegistrationFormData>({
    resolver: zodResolver(registrationSchema),
    mode: "onChange",
  });

  const watchedPassword = watch("password");

  const handleProvinceChange = (provinceId: string) => {
    setSelectedProvince(provinceId);
    setSelectedCity("");
    setSelectedDistrict("");
    setValue("kota", "");
    setValue("kecamatan", "");
    if (provinceId) {
      fetchCities(provinceId);
    }
  };

  const handleCityChange = (cityId: string) => {
    setSelectedCity(cityId);
    setSelectedDistrict("");
    setValue("kecamatan", "");
    if (cityId) {
      fetchDistricts(cityId);
    }
  };

  const handleDistrictChange = (districtId: string) => {
    setSelectedDistrict(districtId);
    setValue("kecamatan", districtId);
  };

  const handleInstituteChange = (instituteId: string) => {
    setSelectedInstitute(instituteId);
    setIsCustomInstitute(instituteId === "0");
  };

  const handlePasswordChange = (value: string) => {
    setPassword(value);
    setValue("password", value);
  };

  const handlePasswordConfChange = (value: string) => {
    setPasswordConf(value);
    setValue("passwordConf", value);
  };

  const togglePasswordVisibility = () => {
    setShowPassword(!showPassword);
  };

  const togglePasswordConfVisibility = () => {
    setShowPasswordConf(!showPasswordConf);
  };

  const onSubmit = async (data: RegistrationFormData) => {
    try {
      let instituteId = 1;

      // Handle custom institute for journalists
      if (category === "6" && isCustomInstitute) {
        if (!customInstituteName.trim() || !instituteAddress.trim()) {
          onError?.("Please fill in all institute details");
          return;
        }

        const instituteData: InstituteData = {
          name: customInstituteName,
          address: instituteAddress,
        };

        instituteId = await saveInstitute(instituteData);
      } else if (category === "6" && selectedInstitute) {
        instituteId = Number(selectedInstitute);
      }

      const success = await submitRegistration(data, category, userData, instituteId);
      
      if (success) {
        onSuccess?.(data);
      }
    } catch (error: any) {
      onError?.(error.message || "Registration failed");
    }
  };

  const renderInstituteFields = () => {
    if (category !== "6") return null;

    return (
      <div className="flex flex-col gap-3 px-0 lg:px-[34px] mb-4">
        <div className="flex flex-col mb-2">
          <Label htmlFor="institute" className="mb-2">
            {t("institutions", { defaultValue: "Institution" })} <span className="text-red-500">*</span>
          </Label>
          <select
            className="mb-3 p-2 border text-sm text-slate-400 rounded-md border-slate-300 bg-white cursor-pointer"
            id="institute"
            onChange={(e) => handleInstituteChange(e.target.value)}
            value={selectedInstitute}
          >
            <option value="" disabled>
              {t("selectInst", { defaultValue: "Select Institution" })}
            </option>
            {institutes.map((institute) => (
              <option key={institute.id} value={institute.id}>
                {institute.name}
              </option>
            ))}
            <option value="0">
              {t("otherInst", { defaultValue: "Other Institution" })}
            </option>
          </select>
        </div>

        {isCustomInstitute && (
          <>
            <div>
              <Label htmlFor="customInstituteName" className="mb-2">
                {t("instName", { defaultValue: "Institution Name" })} <span className="text-red-500">*</span>
              </Label>
              <Input
                className="mb-3"
                autoComplete="off"
                placeholder="Enter your institution name"
                type="text"
                value={customInstituteName}
                onChange={(e) => setCustomInstituteName(e.target.value)}
              />
            </div>
            <div>
              <Label htmlFor="instituteAddress" className="mb-2">
                {t("instAddress", { defaultValue: "Institution Address" })} <span className="text-red-500">*</span>
              </Label>
              <Textarea
                className="mb-3"
                placeholder={t("addressInst", { defaultValue: "Enter institution address" })}
                rows={3}
                value={instituteAddress}
                onChange={(e) => setInstituteAddress(e.target.value)}
              />
            </div>
          </>
        )}
      </div>
    );
  };

  return (
    <div className={className}>
      <form onSubmit={handleSubmit(onSubmit)} className="space-y-6">
        <div className="flex flex-col px-8 lg:px-12">
          {/* Identity Information (Read-only) */}
          {(category === "6" || category === "7") && (
            <div className="px-0 lg:px-[34px] mb-4">
              <Label className="mb-2">
                {category === "6" ? t("journalistNumber", { defaultValue: "Journalist Number" }) : "NRP"}
                <span className="text-red-500">*</span>
              </Label>
              <Input
                type="text"
                autoComplete="off"
                className="mb-3"
                placeholder={t("inputNumberIdentity", { defaultValue: "Enter identity number" })}
                value={userData?.journalistCertificate || userData?.policeNumber || ""}
                disabled
              />
            </div>
          )}

          {/* Personal Information */}
          <div className="mb-4 px-0 lg:px-[34px]">
            <Label className="mb-2">
              {t("fullName", { defaultValue: "Full Name" })} <span className="text-red-500">*</span>
            </Label>
            <Input
              type="text"
              autoComplete="off"
              className={errors.firstName ? "border-red-500" : ""}
              {...register("firstName")}
              placeholder={t("enterFullName", { defaultValue: "Enter your full name" })}
            />
            {errors.firstName && (
              <div className="text-red-500 text-sm mt-1">{errors.firstName.message}</div>
            )}
          </div>

          <div className="mb-4 px-0 lg:px-[34px]">
            <Label className="mb-2">
              Username <span className="text-red-500">*</span>
            </Label>
            <Input
              type="text"
              autoComplete="off"
              className={errors.username ? "border-red-500" : ""}
              {...register("username")}
              placeholder={t("enterUsername", { defaultValue: "Enter username" })}
              onChange={(e) => {
                const value = e.target.value.replace(/[^\w.-]/g, "").toLowerCase();
                setValue("username", value);
              }}
            />
            {errors.username && (
              <div className="text-red-500 text-sm mt-1">{errors.username.message}</div>
            )}
          </div>

          <div className="mb-4 px-0 lg:px-[34px]">
            <Label className="mb-2">
              Email <span className="text-red-500">*</span>
            </Label>
            <Input
              type="email"
              autoComplete="off"
              className={errors.email ? "border-red-500" : ""}
              {...register("email")}
              placeholder="Enter your email"
              value={userData?.email || ""}
              disabled
            />
            {errors.email && (
              <div className="text-red-500 text-sm mt-1">{errors.email.message}</div>
            )}
          </div>

          <div className="flex flex-col px-0 lg:px-[34px] mb-4">
            <Label className="mb-2">
              {t("number", { defaultValue: "Phone Number" })} <span className="text-red-500">*</span>
            </Label>
            <Input
              type="tel"
              autoComplete="off"
              className={errors.phoneNumber ? "border-red-500" : ""}
              {...register("phoneNumber")}
              placeholder={t("enterNumber", { defaultValue: "Enter phone number" })}
            />
            {errors.phoneNumber && (
              <div className="text-red-500 text-sm mt-1">{errors.phoneNumber.message}</div>
            )}
          </div>

          <div className="mb-4 px-0 lg:px-[34px]">
            <Label htmlFor="address" className="mb-2">
              {t("address", { defaultValue: "Address" })} <span className="text-red-500">*</span>
            </Label>
            <Textarea
              className={errors.address ? "border-red-500" : ""}
              {...register("address")}
              placeholder={t("insertAddress", { defaultValue: "Enter your address" })}
              rows={3}
            />
            {errors.address && (
              <div className="text-red-500 text-sm mt-1">{errors.address.message}</div>
            )}
          </div>

          {/* Institute Fields (Journalist only) */}
          {renderInstituteFields()}

          {/* Location Fields */}
          <div className="flex flex-col px-0 lg:px-[34px] mb-4">
            <Label htmlFor="provinsi" className="mb-2">
              {t("province", { defaultValue: "Province" })} <span className="text-red-500">*</span>
            </Label>
            <select
              className={`mb-3 p-2 border rounded-md text-sm text-slate-400 border-slate-300 bg-white cursor-pointer ${
                errors.provinsi ? "border-red-500" : ""
              }`}
              {...register("provinsi")}
              id="provinsi"
              onChange={(e) => handleProvinceChange(e.target.value)}
              value={selectedProvince}
            >
              <option value="" disabled>
                {t("selectProv", { defaultValue: "Select Province" })}
              </option>
              {provinces.map((province) => (
                <option key={province.id} value={province.id}>
                  {province.provName}
                </option>
              ))}
            </select>
            {errors.provinsi && (
              <div className="text-red-500 text-sm mt-1">{errors.provinsi.message}</div>
            )}
          </div>

          <div className="flex flex-col px-0 lg:px-[34px] mb-4">
            <Label htmlFor="kota" className="mb-2">
              {t("city", { defaultValue: "City" })} <span className="text-red-500">*</span>
            </Label>
            <select
              className={`mb-3 p-2 border text-sm text-slate-400 rounded-md border-slate-300 bg-white cursor-pointer ${
                errors.kota ? "border-red-500" : ""
              }`}
              {...register("kota")}
              id="kota"
              onChange={(e) => handleCityChange(e.target.value)}
              value={selectedCity}
              disabled={!selectedProvince}
            >
              <option value="" disabled>
                {t("selectCity", { defaultValue: "Select City" })}
              </option>
              {cities.map((city) => (
                <option key={city.id} value={city.id}>
                  {city.cityName}
                </option>
              ))}
            </select>
            {errors.kota && (
              <div className="text-red-500 text-sm mt-1">{errors.kota.message}</div>
            )}
          </div>

          <div className="flex flex-col px-0 lg:px-[34px] mb-4">
            <Label htmlFor="kecamatan" className="mb-2">
              {t("subdistrict", { defaultValue: "Subdistrict" })} <span className="text-red-500">*</span>
            </Label>
            <select
              className={`p-2 border text-sm text-slate-400 rounded-md border-slate-300 bg-white cursor-pointer ${
                errors.kecamatan ? "border-red-500" : ""
              }`}
              {...register("kecamatan")}
              id="kecamatan"
              onChange={(e) => handleDistrictChange(e.target.value)}
              value={selectedDistrict}
              disabled={!selectedCity}
            >
              <option value="" disabled>
                {t("selectSub", { defaultValue: "Select Subdistrict" })}
              </option>
              {districts.map((district) => (
                <option key={district.id} value={district.id}>
                  {district.disName}
                </option>
              ))}
            </select>
            {errors.kecamatan && (
              <div className="text-red-500 text-sm mt-1">{errors.kecamatan.message}</div>
            )}
          </div>

          {/* Password Fields */}
          <div className="mt-3.5 space-y-2 px-0 lg:px-[34px] mb-4">
            <Label htmlFor="password" className="mb-2 font-medium text-default-600">
              {t("password", { defaultValue: "Password" })} <span className="text-red-500">*</span>
            </Label>
            <div className="relative">
              <Input
                size="lg"
                type={showPassword ? "text" : "password"}
                autoComplete="off"
                className={errors.password ? "border-red-500" : ""}
                {...register("password")}
                placeholder={t("inputPass", { defaultValue: "Enter password" })}
                onChange={(e) => handlePasswordChange(e.target.value)}
              />
              <div className="absolute top-1/2 -translate-y-1/2 ltr:right-4 rtl:left-4 cursor-pointer" onClick={togglePasswordVisibility}>
                {showPassword ? (
                  <Icon icon="heroicons:eye-slash" className="w-5 h-5 text-default-400" />
                ) : (
                  <Icon icon="heroicons:eye" className="w-5 h-5 text-default-400" />
                )}
              </div>
            </div>
            {errors.password && (
              <div className="text-red-500 text-sm mt-1">{errors.password.message}</div>
            )}
          </div>

          <div className="mt-3.5 space-y-2 px-0 lg:px-[34px] mb-4">
            <Label htmlFor="passwordConf" className="mb-2 font-medium text-default-600">
              {t("confirmPass", { defaultValue: "Confirm Password" })} <span className="text-red-500">*</span>
            </Label>
            <div className="relative">
              <Input
                size="lg"
                type={showPasswordConf ? "text" : "password"}
                autoComplete="off"
                className={errors.passwordConf ? "border-red-500" : ""}
                {...register("passwordConf")}
                placeholder={t("samePass", { defaultValue: "Confirm your password" })}
                onChange={(e) => handlePasswordConfChange(e.target.value)}
              />
              <div className="absolute top-1/2 -translate-y-1/2 ltr:right-4 rtl:left-4 cursor-pointer" onClick={togglePasswordConfVisibility}>
                {showPasswordConf ? (
                  <Icon icon="heroicons:eye-slash" className="w-5 h-5 text-default-400" />
                ) : (
                  <Icon icon="heroicons:eye" className="w-5 h-5 text-default-400" />
                )}
              </div>
            </div>
            {errors.passwordConf && (
              <div className="text-red-500 text-sm mt-1">{errors.passwordConf.message}</div>
            )}
          </div>

          {/* Password Checklist */}
          <div className="form-group px-0 lg:px-[34px] mb-4">
            <PasswordChecklist
              rules={["minLength", "specialChar", "number", "capital", "match"]}
              minLength={8}
              value={password}
              valueAgain={passwordConf}
              onChange={(isValid: boolean) => {
                // Password validation is handled by the form schema
              }}
              messages={{
                minLength: t("passCharacter", { defaultValue: "Password must be at least 8 characters" }),
                specialChar: t("passSpecial", { defaultValue: "Password must contain at least one special character" }),
                number: t("passNumber", { defaultValue: "Password must contain at least one number" }),
                capital: t("passCapital", { defaultValue: "Password must contain at least one uppercase letter" }),
                match: t("passSame", { defaultValue: "Passwords must match" }),
              }}
            />
          </div>

          {/* Submit Button */}
          <div className="flex justify-center items-center mt-2 mb-4 px-[34px]">
            <Button
              type="submit"
              disabled={isSubmitting || submitLoading || locationLoading || instituteLoading}
              className="border w-[550px] text-center bg-red-700 text-white hover:bg-white hover:text-red-700"
            >
              {isSubmitting || submitLoading || locationLoading || instituteLoading ? (
                <div className="flex items-center gap-2">
                  <div className="w-4 h-4 border-2 border-white border-t-transparent rounded-full animate-spin" />
                  Processing...
                </div>
              ) : (
                t("register", { defaultValue: "Register" })
              )}
            </Button>
          </div>
        </div>
      </form>
    </div>
  );
};