"use client";

import { UserIcon, PencilIcon, CheckIcon, XMarkIcon } from "@heroicons/react/24/outline";
import { Button } from "@/components/atoms/button";
import { Input } from "@/components/atoms/input";

/** Data required for displaying personal info card */
interface PersonalInfoData {
  firstname: string | null | undefined;
  lastname: string | null | undefined;
  email: string;
  phonenumber: string | null | undefined;
  sfNumber: string | null | undefined;
  dateOfBirth: string | null | undefined;
  gender: string | null | undefined;
}

interface PersonalInfoCardProps {
  /** User profile data including read-only fields */
  data: PersonalInfoData;
  /** Email value for editing (may differ from data.email during edit) */
  editEmail: string;
  /** Phone number value for editing (may differ from data.phonenumber during edit) */
  editPhoneNumber: string;
  isEditing: boolean;
  isSaving: boolean;
  onEdit: () => void;
  onCancel: () => void;
  onChange: (field: "email" | "phonenumber", value: string) => void;
  onSave: () => void;
}

function ReadOnlyField({
  label,
  value,
  hint,
}: {
  label: string;
  value: string | null | undefined;
  hint: string;
}) {
  return (
    <div>
      <label className="block text-sm font-medium text-muted-foreground mb-2">{label}</label>
      <div className="bg-card rounded-lg p-4 border border-border shadow-sm">
        <p className="text-base text-foreground font-medium">
          {value || <span className="text-muted-foreground italic">Not provided</span>}
        </p>
        <p className="text-xs text-muted-foreground mt-2">{hint}</p>
      </div>
    </div>
  );
}

const EDITABLE_INPUT_CLASS =
  "block w-full px-4 py-2.5 border border-input rounded-lg bg-background text-foreground shadow-[var(--cp-shadow-1)] focus:outline-none focus:ring-2 focus:ring-ring focus:border-ring transition-colors";

function EditableEmailField({
  email,
  editEmail,
  isEditing,
  onChange,
}: {
  email: string;
  editEmail: string;
  isEditing: boolean;
  onChange: (field: "email" | "phonenumber", value: string) => void;
}) {
  return (
    <div className="sm:col-span-2">
      <label className="block text-sm font-medium text-muted-foreground mb-2">Email Address</label>
      {isEditing ? (
        <Input
          type="email"
          value={editEmail}
          onChange={e => onChange("email", e.target.value)}
          className={EDITABLE_INPUT_CLASS}
        />
      ) : (
        <div className="bg-card rounded-lg p-4 border border-border shadow-sm">
          <p className="text-base text-foreground font-medium">{email}</p>
          <p className="text-xs text-muted-foreground mt-2">
            Email can be updated from the portal.
          </p>
        </div>
      )}
    </div>
  );
}

function EditablePhoneField({
  phonenumber,
  editPhoneNumber,
  isEditing,
  onChange,
}: {
  phonenumber: string | null | undefined;
  editPhoneNumber: string;
  isEditing: boolean;
  onChange: (field: "email" | "phonenumber", value: string) => void;
}) {
  return (
    <div>
      <label className="block text-sm font-medium text-muted-foreground mb-2">Phone Number</label>
      {isEditing ? (
        <Input
          type="tel"
          value={editPhoneNumber}
          onChange={e => onChange("phonenumber", e.target.value)}
          placeholder="+81 XX-XXXX-XXXX"
          className={EDITABLE_INPUT_CLASS}
        />
      ) : (
        <p className="text-base text-foreground py-2">
          {phonenumber || <span className="text-muted-foreground italic">Not provided</span>}
        </p>
      )}
    </div>
  );
}

export function PersonalInfoCard({
  data,
  editEmail,
  editPhoneNumber,
  isEditing,
  isSaving,
  onEdit,
  onCancel,
  onChange,
  onSave,
}: PersonalInfoCardProps) {
  return (
    <div className="bg-card text-card-foreground rounded-xl border border-border shadow-[var(--cp-shadow-1)]">
      <div className="px-6 py-5 border-b border-border">
        <div className="flex items-center justify-between">
          <div className="flex items-center space-x-3">
            <UserIcon className="h-6 w-6 text-primary" />
            <h2 className="text-xl font-semibold text-foreground">Personal Information</h2>
          </div>
          {!isEditing && (
            <Button
              variant="outline"
              size="sm"
              onClick={onEdit}
              leftIcon={<PencilIcon className="h-4 w-4" />}
            >
              Edit
            </Button>
          )}
        </div>
      </div>

      <div className="p-6">
        <div className="grid grid-cols-1 gap-6 sm:grid-cols-2">
          <ReadOnlyField
            label="First Name"
            value={data.firstname}
            hint="Name cannot be changed from the portal."
          />
          <ReadOnlyField
            label="Last Name"
            value={data.lastname}
            hint="Name cannot be changed from the portal."
          />

          <EditableEmailField
            email={data.email}
            editEmail={editEmail}
            isEditing={isEditing}
            onChange={onChange}
          />

          <ReadOnlyField
            label="Customer Number"
            value={data.sfNumber}
            hint="Customer number is read-only."
          />
          <ReadOnlyField
            label="Date of Birth"
            value={data.dateOfBirth}
            hint="Date of birth is stored in billing profile."
          />

          <EditablePhoneField
            phonenumber={data.phonenumber}
            editPhoneNumber={editPhoneNumber}
            isEditing={isEditing}
            onChange={onChange}
          />

          <ReadOnlyField
            label="Gender"
            value={data.gender}
            hint="Gender is stored in billing profile."
          />
        </div>

        {isEditing && (
          <div className="flex items-center justify-end space-x-3 pt-6 border-t border-border mt-6">
            <Button
              variant="outline"
              size="sm"
              onClick={onCancel}
              disabled={isSaving}
              leftIcon={<XMarkIcon className="h-4 w-4" />}
            >
              Cancel
            </Button>
            <Button
              size="sm"
              onClick={onSave}
              isLoading={isSaving}
              leftIcon={isSaving ? undefined : <CheckIcon className="h-4 w-4" />}
            >
              {isSaving ? "Saving..." : "Save Changes"}
            </Button>
          </div>
        )}
      </div>
    </div>
  );
}