import React, { useEffect, useRef, useMemo, useState } from 'react';
import {
  Form,
  Input,
  DatePicker,
  InputNumber,
  Select,
  Radio,
  FormInstance,
  message,
} from 'antd';
import { useIntl, FormattedMessage } from 'react-intl';
import { registerFormFields } from '@/validation/patient/registerSchema';
import NumberWithUnit from '@/components/NumberWithUnit';
import dayjs, { Dayjs } from 'dayjs';
import { useSelector, useDispatch } from 'react-redux';
import { RootState } from '@/states/store';
import { setFormData } from '@/states/patient/register/formSlice';
import {
  PregnancyStatus,
  pregnancyStatusOptions,
} from '@/domain/patient/pregnancyStatus';
import { getGenderOptions } from '@/domain/patient/genderOptions';
import { processQRCodeData, transformToFormData } from '@/domain/qrcode/qrCodeDataProcessor';
interface BasicInfoFormProps {
  style?: React.CSSProperties;
  form?: FormInstance;
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  onValuesChange?: (changedValues: any, allValues: any) => void;
}
const BasicInfoForm: React.FC<BasicInfoFormProps> = ({
  style,
  form,
  onValuesChange,
}) => {
  // 使用 ref 记录更新源，防止循环触发
  const updateSourceRef = useRef<'age' | 'dob' | null>(null);

  const patient_age = Form.useWatch('patient_age', form);
  const patient_dob = Form.useWatch('patient_dob', form);

  const productName = useSelector(
    (state: RootState) => state.product.productName
  );
  const formData = useSelector((state: RootState) => state.form.formData);
  const dispatch = useDispatch();
  const [pregnancyStatusFieldVisible, setPregnancyStatusFieldVisible] =
    useState(false);
  const initializedRef = useRef(false);

  // 扫码枪扫码相关状态
  const scanInputRef = useRef<HTMLInputElement>(null);
  const [isComposing, setIsComposing] = useState(false);
  const bufferRef = useRef('');
  const timerRef = useRef<number | null>(null);

  // 同步初始表单值到 Redux store，并生成登记号
  useEffect(() => {
    if (!initializedRef.current) {
      // 生成登记号（如果不存在）
      let updatedFormData = { ...formData };
      if (!updatedFormData.accession_number) {
        const now = dayjs();
        updatedFormData.accession_number = now.format('YYYYMMDDHHmmss');
      }

      const allValues = form?.getFieldsValue();
      if (allValues && Object.keys(allValues).length > 0) {
        const merged = { ...allValues ,...updatedFormData};
        dispatch(setFormData(merged));
        form?.setFieldsValue(merged)
      }

      initializedRef.current = true;
    }
  }, [form, dispatch, formData]);

  const intl = useIntl();

  // 动态获取性别选项
  const genderOptions = useMemo(() => {
    return getGenderOptions(productName);
  }, [productName]);

  // 根据年龄计算出生日期
  const calculateDobFromAge = (age: {
    number: number;
    unit: 'D' | 'M' | 'Y';
  }): Dayjs => {
    const now = dayjs();
    switch (age.unit) {
      case 'D':
        return now.subtract(age.number, 'day');
      case 'M':
        return now.subtract(age.number, 'month');
      case 'Y':
        return now.subtract(age.number, 'year');
      default:
        return now;
    }
  };

  // 根据出生日期计算年龄
  const calculateAgeFromDob = (
    dob: Dayjs
  ): { number: number; unit: 'D' | 'M' | 'Y' } => {
    const now = dayjs();

    const years = now.diff(dob, 'year');
    if (years >= 1) {
      return { number: years, unit: 'Y' };
    }

    const months = now.diff(dob, 'month');
    if (months >= 1) {
      return { number: months, unit: 'M' };
    }

    const days = now.diff(dob, 'day');
    return { number: Math.max(0, days), unit: 'D' };
  };

  // 监听年龄变化
  useEffect(() => {
    // 如果是出生日期联动更新的年龄，跳过
    if (updateSourceRef.current === 'dob') {
      updateSourceRef.current = null;
      return;
    }

    // 如果年龄有效，计算出生日期
    if (patient_age && patient_age.number >= 0 && form) {
      updateSourceRef.current = 'age';
      const newDob = calculateDobFromAge(patient_age);
      form.setFieldsValue({ patient_dob: newDob });
      //人工同步更新 Redux store
      dispatch(setFormData(form.getFieldsValue()))
      console.log('年龄变化，更新出生日期:', newDob.format('YYYY-MM-DD'));
    }
  }, [patient_age, form]);

  // 监听出生日期变化
  useEffect(() => {
    // 如果是年龄联动更新的出生日期，跳过
    if (updateSourceRef.current === 'age') {
      updateSourceRef.current = null;
      return;
    }

    // 如果出生日期有效，计算年龄
    if (patient_dob && dayjs.isDayjs(patient_dob) && form) {
      updateSourceRef.current = 'dob';
      const newAge = calculateAgeFromDob(patient_dob);
      form.setFieldsValue({ patient_age: newAge });
      console.log('出生日期变化，更新年龄:', newAge);
    }
  }, [patient_dob, form]);

  // 处理扫码枪扫码后的数据：解析文本并自动填充到注册表单
  const processScannedData = React.useCallback(async (scannedText: string) => {
    try {
      // 添加调试日志，输出实际接收到的扫码文本
      console.log('[扫码枪调试] 得到的扫码数据是:', JSON.stringify(scannedText));
      console.log('[扫码枪调试] 扫码数据长度:', scannedText.length);

      // 使用二维码数据处理器解析扫码文本（复用现有逻辑）
      const result = processQRCodeData(scannedText);
      if (!result.success) {
        message.error(result.error || '扫码枪数据处理失败');
        return;
      }

      // 将解析后的数据转换为表单格式
      const formData = transformToFormData(result.data!);

      // 自动填充表单
      form?.setFieldsValue(formData);

      // 同步更新 Redux store
      dispatch(setFormData(formData));

      // 显示成功提示
      message.success('扫码枪数据已自动填充到表单');
    } catch (error) {
      console.error('扫码枪数据处理失败:', error);
      message.error('扫码枪数据处理失败');
    }
  }, [form, dispatch]);

  // 扫码枪扫码监听器：页面级 keydown 监听，自动切换焦点到隐藏input
  useEffect(() => {
    const handleKeyDown = (e: KeyboardEvent) => {
      const target = e.target as HTMLElement;

      const isEditable =
        target &&
        (target.tagName === 'INPUT' ||
          target.tagName === 'TEXTAREA' ||
          target.isContentEditable);

      // 如果当前没有可编辑元素获得焦点，认为是扫码枪输入
      if (!isEditable) {
        scanInputRef.current?.focus();
      }

      // 扫码枪通常以 Enter 结束
      if (e.key === 'Enter') {
        if (bufferRef.current) {
          processScannedData(bufferRef.current);
          bufferRef.current = '';
          if (scanInputRef.current) {
            scanInputRef.current.value = '';
          }
        }
        // 阻止Enter键的默认行为（如表单提交）
        e.preventDefault();
        e.stopPropagation();
      } else if (e.key === 'Tab') {
        // 完全控制Tab键行为，防止焦点切换
        e.preventDefault();
        e.stopPropagation();

        // 手动将Tab字符插入到隐藏input中
        const input = scanInputRef.current;
        if (input) {
          const start = input.selectionStart || 0;
          const end = input.selectionEnd || 0;
          const value = input.value;

          // 在光标位置插入Tab字符
          input.value = value.substring(0, start) + '\t' + value.substring(end);

          // 更新光标位置
          input.selectionStart = input.selectionEnd = start + 1;

          // 手动触发input事件，确保React能检测到变化
          input.dispatchEvent(new Event('input', { bubbles: true }));
        }
      }
      // 其他字符不阻止，让它们自然输入到隐藏input中
      // input会自动过滤掉无效字符，只保留有效的文本
    };

    window.addEventListener('keydown', handleKeyDown);
    return () => window.removeEventListener('keydown', handleKeyDown);
  }, [processScannedData]);

  /** input 事件：真正可靠地拿中文 */
  const handleScanInput = (e: React.ChangeEvent<HTMLInputElement>) => {
    if (isComposing) return;

    bufferRef.current = e.target.value;

    // 防止没有 Enter 的扫码枪（用时间判断）
    if (timerRef.current) {
      clearTimeout(timerRef.current);
    }

    timerRef.current = window.setTimeout(() => {
      if (bufferRef.current) {
        processScannedData(bufferRef.current);
        bufferRef.current = '';
        e.target.value = '';
      }
    }, 300); // 300ms 内无新输入，认为扫码结束
  };

  return (
    <Form
      form={form}
      layout="vertical"
      style={style}
      className="px-2"
      initialValues={
        {
          // patient_dob: dayjs(),
        }
      }
      onValuesChange={onValuesChange}
    >
      {/** 宠物专用 */}
      {productName === 'VETDROS' && (
        <Form.Item
          label={
            <FormattedMessage
              id="register.owner_name"
              defaultMessage="register.owner_name"
            />
          }
          name="owner_name"
          required={registerFormFields.owner_name.required}
          validateTrigger={registerFormFields.owner_name.trigger}
          rules={registerFormFields.owner_name.validation}
        >
          <Input
            placeholder={intl.formatMessage({
              id: 'register.owner_name.placeholder',
              defaultMessage: 'register.owner_name.placeholder',
            })}
          />
        </Form.Item>
      )}
      <Form.Item
        label={
          <FormattedMessage
            id={
              productName === 'VETDROS'
                ? 'animal.register.patientName'
                : 'register.patientName'
            }
            defaultMessage={
              productName === 'VETDROS'
                ? 'animal.register.patientName'
                : 'register.patientName'
            }
          />
        }
        name="patient_name"
        required={registerFormFields.patient_name.required}
        validateTrigger={registerFormFields.patient_name.trigger}
        rules={registerFormFields.patient_name.validation}
      >
        <Input
          placeholder={intl.formatMessage({
            id:
              productName === 'VETDROS'
                ? 'animal.register.patientName.placeholder'
                : 'register.patientName.placeholder',
            defaultMessage:
              productName === 'VETDROS'
                ? 'animal.register.patientName.placeholder'
                : 'register.patientName.placeholder',
          })}
        />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.accessionNumber"
            defaultMessage="register.accessionNumber"
          />
        }
        name="accession_number"
        required={registerFormFields.accession_number.required}
        validateTrigger={registerFormFields.accession_number.trigger}
        rules={registerFormFields.accession_number.validation}
      >
        <Input
          placeholder={intl.formatMessage({
            id: 'register.accessionNumber.placeholder',
            defaultMessage: 'register.accessionNumber.placeholder',
          })}
        />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id={
              productName === 'VETDROS'
                ? 'animal.register.patientId'
                : 'register.patientId'
            }
            defaultMessage={
              productName === 'VETDROS'
                ? 'animal.register.patientId'
                : 'register.patientId'
            }
          />
        }
        name="patient_id"
        required={registerFormFields.patient_id.required}
        validateTrigger={registerFormFields.patient_id.trigger}
        rules={registerFormFields.patient_id.validation}
      >
        <Input
          placeholder={intl.formatMessage({
            id:
              productName === 'VETDROS'
                ? 'animal.register.patientId.placeholder'
                : 'register.patientId.placeholder',
            defaultMessage:
              productName === 'VETDROS'
                ? 'animal.register.patientId.placeholder'
                : 'register.patientId.placeholder',
          })}
        />
      </Form.Item>

      <Form.Item
        label={
          <FormattedMessage
            id={
              productName === 'VETDROS'
                ? 'animal.register.patientSize'
                : 'register.patientSize'
            }
            defaultMessage={
              productName === 'VETDROS'
                ? 'animal.register.patientSize'
                : 'register.patientSize'
            }
          />
        }
        name="patient_size"
        required={registerFormFields.patient_size.required}
        validateTrigger={registerFormFields.patient_size.trigger}
        rules={registerFormFields.patient_size.validation}
        initialValue="Medium"
      >
        <Select
          placeholder={intl.formatMessage({
            id:
              productName === 'VETDROS'
                ? 'animal.register.patientSize.placeholder'
                : 'register.patientSize.placeholder',
            defaultMessage:
              productName === 'VETDROS'
                ? 'animal.register.patientSize.placeholder'
                : 'register.patientSize.placeholder',
          })}
          defaultValue="Medium"
        >
          <Select.Option value="Large">
            {intl.formatMessage({ id: 'Large', defaultMessage: 'Large' })}
          </Select.Option>
          <Select.Option value="Medium">
            {intl.formatMessage({ id: 'Medium', defaultMessage: 'Medium' })}
          </Select.Option>
          <Select.Option value="Small">
            {intl.formatMessage({ id: 'Small', defaultMessage: 'Small' })}
          </Select.Option>
        </Select>
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage id="register.age" defaultMessage="register.age" />
        }
        name="patient_age"
        required={registerFormFields.patient_age.required}
        validateTrigger={registerFormFields.patient_age.trigger}
        rules={registerFormFields.patient_age.validation}
        initialValue={{ number: 0, unit: 'Y' }}
      >
        <NumberWithUnit
          align="baseline"
          defaultUnit="Y"
          defaultNumber={0}
          unitClassName="w-full"
          numberClassName="w-full"
          className="w-full"
          options={[
            { label: '天', value: 'D' },
            { label: '月', value: 'M' },
            { label: '年', value: 'Y' },
          ]}
        />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.dateOfBirth"
            defaultMessage="register.dateOfBirth"
          />
        }
        name="patient_dob"
        required={registerFormFields.patient_dob.required}
        validateTrigger={registerFormFields.patient_dob.trigger}
        rules={registerFormFields.patient_dob.validation}
        initialValue={dayjs()}
      >
        <DatePicker
          format="YYYY-MM-DD"
          style={{ width: '100%' }}
          defaultValue={dayjs()}
          disabledDate={(current) => current && current > dayjs().endOf('day')}
        />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.gender"
            defaultMessage="register.gender"
          />
        }
        name="patient_sex"
        required={registerFormFields.patient_sex.required}
        validateTrigger={registerFormFields.patient_sex.trigger}
        rules={registerFormFields.patient_sex.validation}
      >
        <Select
          options={genderOptions}
          onChange={(e) => {
            const _PregnancyStatusFieldVisible = e === 'M';
            setPregnancyStatusFieldVisible(_PregnancyStatusFieldVisible);
            if (_PregnancyStatusFieldVisible) {
              // 更新表单
              form?.setFieldValue('pregnancy_status', PregnancyStatus.UNKNOWN);

              // 手动同步更新 Redux store
              const currentValues = form?.getFieldsValue();
              dispatch(
                setFormData({
                  ...currentValues,
                  pregnancy_status: PregnancyStatus.UNKNOWN,
                })
              );
            }
          }}
        />
      </Form.Item>
      {/** 宠物专用 */}
      {productName === 'VETDROS' && (
        <Form.Item
          label={
            <FormattedMessage
              id="register.sexNeutered"
              defaultMessage="register.sexNeutered"
            />
          }
          name="sex_neutered"
          required={registerFormFields.sex_neutered.required}
          validateTrigger={registerFormFields.sex_neutered.trigger}
          rules={registerFormFields.sex_neutered.validation}
        >
          <Select
            defaultValue={'UNALTERED'}
            placeholder={intl.formatMessage({
              id: 'register.sexNeutered.placeholder',
              defaultMessage: 'register.sexNeutered.placeholder',
            })}
          >
            <Select.Option value="ALTERED">
              {intl.formatMessage({
                id: 'register.sexNeutered.altered',
                defaultMessage: 'ALTERED',
              })}
            </Select.Option>
            <Select.Option value="UNALTERED">
              {intl.formatMessage({
                id: 'register.sexNeutered.unaltered',
                defaultMessage: 'UNALTERED',
              })}
            </Select.Option>
          </Select>
        </Form.Item>
      )}
      {/** 人类专用 */}
      {productName === 'DROS' && form?.getFieldValue('patient_sex') && (
        <Form.Item
          hidden={pregnancyStatusFieldVisible}
          label={
            <FormattedMessage
              id="register.pregnancyStatus"
              defaultMessage="register.pregnancyStatus"
            />
          }
          name="pregnancy_status"
          required={registerFormFields.pregnancy_status.required}
          validateTrigger={registerFormFields.pregnancy_status.trigger}
          rules={registerFormFields.pregnancy_status.validation}
          initialValue={PregnancyStatus.UNKNOWN}
        >
          <Radio.Group
            options={pregnancyStatusOptions}
            optionType="button"
            buttonStyle="solid"
          />
        </Form.Item>
      )}
      {/** 宠物专用 */}
      {productName === 'VETDROS' && (
        <Form.Item
          label={
            <FormattedMessage
              id="register.chipNumber"
              defaultMessage="register.chipNumber"
            />
          }
          name="chip_number"
          required={registerFormFields.chip_number.required}
          validateTrigger={registerFormFields.chip_number.trigger}
          rules={registerFormFields.chip_number.validation}
        >
          <Input
            placeholder={intl.formatMessage({
              id: 'register.chipNumber.placeholder',
              defaultMessage: 'register.chipNumber.placeholder',
            })}
          />
        </Form.Item>
      )}
      {/** 宠物专用 */}
      {productName === 'VETDROS' && (
        <Form.Item
          label={
            <FormattedMessage
              id="register.variety"
              defaultMessage="register.variety"
            />
          }
          name="variety"
          required={registerFormFields.variety.required}
          validateTrigger={registerFormFields.variety.trigger}
          rules={registerFormFields.variety.validation}
        >
          <Input
            placeholder={intl.formatMessage({
              id: 'register.variety.placeholder',
              defaultMessage: 'register.variety.placeholder',
            })}
          />
        </Form.Item>
      )}
      {/* <Form.Item
        label={
          <FormattedMessage
            id="register.patientType"
            defaultMessage="register.patientType"
          />
        }
        name="patient_type"
        required={registerFormFields.patient_type.required}
        validateTrigger={registerFormFields.patient_type.trigger}
        rules={registerFormFields.patient_type.validation}
      >
        <Input
          placeholder={intl.formatMessage({
            id: 'register.patientType.placeholder',
            defaultMessage: 'register.patientType.placeholder',
          })}
        />
      </Form.Item> */}
      <Form.Item
        label={
          <FormattedMessage
            id="register.referringPhysician"
            defaultMessage="register.referringPhysician"
          />
        }
        name="ref_physician"
        required={registerFormFields.ref_physician.required}
        validateTrigger={registerFormFields.ref_physician.trigger}
        rules={registerFormFields.ref_physician.validation}
      >
        <Input
          placeholder={intl.formatMessage({
            id: 'register.referringPhysician.placeholder',
            defaultMessage: 'register.referringPhysician.placeholder',
          })}
        />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.operatorId"
            defaultMessage="register.operatorId"
          />
        }
        name="operator_id"
        required={registerFormFields.operator_id.required}
        validateTrigger={registerFormFields.operator_id.trigger}
        rules={registerFormFields.operator_id.validation}
      >
        <Input
          placeholder={intl.formatMessage({
            id: 'register.operatorId.placeholder',
            defaultMessage: 'register.operatorId.placeholder',
          })}
        />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.weight"
            defaultMessage="register.weight"
          />
        }
        name="weight"
        required={registerFormFields.weight.required}
        validateTrigger={registerFormFields.weight.trigger}
        rules={registerFormFields.weight.validation}
      >
        <InputNumber min={0} addonAfter="kg" style={{ width: '100%' }} />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.thickness"
            defaultMessage="register.thickness"
          />
        }
        name="thickness"
        required={registerFormFields.thickness.required}
        validateTrigger={registerFormFields.thickness.trigger}
        rules={registerFormFields.thickness.validation}
      >
        <InputNumber min={0} addonAfter="cm" style={{ width: '100%' }} />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.height"
            defaultMessage="register.height"
          />
        }
        name="length"
        required={registerFormFields.length.required}
        validateTrigger={registerFormFields.length.trigger}
        rules={registerFormFields.length.validation}
      >
        <InputNumber min={0} addonAfter="cm" style={{ width: '100%' }} />
      </Form.Item>
      <Form.Item
        label={
          <FormattedMessage
            id="register.comment"
            defaultMessage="register.comment"
          />
        }
        name="comment"
        required={registerFormFields.comment.required}
        validateTrigger={registerFormFields.comment.trigger}
        rules={registerFormFields.comment.validation}
      >
        <Input
          placeholder={intl.formatMessage({
            id: 'register.comment.placeholder',
            defaultMessage: 'register.comment.placeholder',
          })}
        />
      </Form.Item>

      {/* 扫码枪兜底 input（隐藏） */}
      <input
        ref={scanInputRef}
        type="text"
        style={{
          position: 'fixed',
          opacity: 0,
          pointerEvents: 'none',
          left: -9999,
        }}
        onCompositionStart={() => setIsComposing(true)}
        onCompositionEnd={(e) => {
          setIsComposing(false);
          bufferRef.current = e.currentTarget.value;
        }}
        onInput={handleScanInput}
        autoComplete="off"
      />
    </Form>
  );
};

export default BasicInfoForm;