import { InfoCircleOutlined } from "@ant-design/icons";
import {
  Checkbox,
  Col,
  DatePicker,
  Divider,
  Form,
  Input,
  InputNumber,
  Radio,
  Select,
  Tooltip,
} from "antd";
import dayjs from "dayjs";
import { FORM_ITEM_RENDER_ENUM } from "../../enum/formItemRender";

const { TextArea } = Input;
const { RangePicker } = DatePicker;

/**
 * 表单项渲染器组件
 */
const FormItemsRenderer = ({
  options,
  span = 12,
  collapse = false,
  useAutoGenerateRequired = true,
}) => {
  const form = Form.useFormInstance();

  // 获取传给组件的属性
  const getComponentProps = (option) => {
    return typeof option.componentProps === "function"
      ? option.componentProps(form.getFieldsValue())
      : (option.componentProps || {});
  };

  // 获取传给formItem的属性
  const getFormItemProps = (option) => {
    const formItemProps = typeof option.formItemProps === "function"
      ? option.formItemProps(form.getFieldsValue())
      : (option.formItemProps || {});

    // 为日期组件添加特殊处理
    if ([
      FORM_ITEM_RENDER_ENUM.DATE,
      FORM_ITEM_RENDER_ENUM.DATE_MONTH,
      FORM_ITEM_RENDER_ENUM.DATE_YEAR,
      FORM_ITEM_RENDER_ENUM.DATETIME,
    ].includes(option.render)) {
      formItemProps.getValueFromEvent = (_, dateString) => dateString;
      formItemProps.getValueProps = value => ({ value: value ? dayjs(value) : undefined });
    }

    // 为日期周组件添加特殊处理
    if ([
      FORM_ITEM_RENDER_ENUM.DATE_WEEK,
    ].includes(option.render)) {
      formItemProps.getValueFromEvent = (_, dateString) => dateString;
      formItemProps.getValueProps = value => ({ value: value ? dayjs(value, "YYYY-wo") : undefined });
    }

    // 为日期范围组件添加特殊处理
    if ([
      FORM_ITEM_RENDER_ENUM.DATE_RANGE,
      FORM_ITEM_RENDER_ENUM.DATETIME_RANGE,
    ].includes(option.render)) {
      formItemProps.getValueFromEvent = (_, dateString) => dateString;
      formItemProps.getValueProps = value => ({ value: Array.isArray(value) ? value.map(v => v ? dayjs(v) : undefined) : undefined });
    }

    return formItemProps;
  };

  // 获取items里的value和label字段key
  const getItemsFieldKey = (option) => {
    return {
      valueKey: option?.itemsField?.valueKey || "id",
      labelKey: option?.itemsField?.labelKey || "name",
    };
  };

  // 获取验证规则
  const getRules = (option) => {
    if (!useAutoGenerateRequired)
      return option.rules ? (Array.isArray(option.rules) ? option.rules : [option.rules]) : [];
    if (option.render === FORM_ITEM_RENDER_ENUM.DIVIDER)
      return [];

    // 支持动态计算 required
    const required = typeof option.required === "function"
      ? option.required(form.getFieldsValue())
      : (option.required ?? true);

    if (required) {
      const isBlurTrigger = !option.render || [
        FORM_ITEM_RENDER_ENUM.INPUT,
        FORM_ITEM_RENDER_ENUM.TEXTAREA,
        FORM_ITEM_RENDER_ENUM.INPUT_NUMBER,
        FORM_ITEM_RENDER_ENUM.NUMBER,
      ].includes(option.render);

      const rules = [
        {
          required: true,
          message: `${isBlurTrigger ? "请输入" : "请选择"}${option.label}`,
        },
      ];

      if (option.rules) {
        if (Array.isArray(option.rules)) {
          rules.push(...option.rules);
        }
        else {
          rules.push(option.rules);
        }
      }
      return rules;
    }

    return option.rules ? (Array.isArray(option.rules) ? option.rules : [option.rules]) : [];
  };

  // 渲染表单控件
  const renderFormControl = (option) => {
    const componentProps = getComponentProps(option);
    const itemsFieldKey = getItemsFieldKey(option);
    /** @type {string | Function} */
    const render = option.render || FORM_ITEM_RENDER_ENUM.INPUT;
    const placeholder = option.placeholder || `请${render === FORM_ITEM_RENDER_ENUM.SELECT || render === FORM_ITEM_RENDER_ENUM.RADIO || render === FORM_ITEM_RENDER_ENUM.CHECKBOX ? "选择" : "输入"}${option.label}`;

    switch (render) {
      case FORM_ITEM_RENDER_ENUM.INPUT:
        return <Input placeholder={placeholder} {...componentProps} />;

      case FORM_ITEM_RENDER_ENUM.TEXTAREA:
        return <TextArea placeholder={placeholder} rows={3} {...componentProps} />;

      case FORM_ITEM_RENDER_ENUM.INPUT_NUMBER:
      case FORM_ITEM_RENDER_ENUM.NUMBER:
        return <InputNumber placeholder={placeholder} style={{ width: "100%" }} {...componentProps} />;

      case FORM_ITEM_RENDER_ENUM.SELECT:
        return (
          <Select placeholder={placeholder} {...componentProps}>
            {(option.items || []).map((item) => {
              const value = item[itemsFieldKey.valueKey];
              const label = item[itemsFieldKey.labelKey];
              return (
                <Select.Option key={value} value={value}>
                  {label}
                </Select.Option>
              );
            })}
          </Select>
        );

      case FORM_ITEM_RENDER_ENUM.RADIO:
        return (
          <Radio.Group {...componentProps}>
            {(option.items || []).map((item) => {
              const value = item[itemsFieldKey.valueKey];
              const label = item[itemsFieldKey.labelKey];
              return (
                <Radio key={value} value={value}>
                  {label}
                </Radio>
              );
            })}
          </Radio.Group>
        );

      case FORM_ITEM_RENDER_ENUM.CHECKBOX:
        return (
          <Checkbox.Group {...componentProps}>
            {(option.items || []).map((item) => {
              const value = item[itemsFieldKey.valueKey];
              const label = item[itemsFieldKey.labelKey];
              return (
                <Checkbox key={value} value={value}>
                  {label}
                </Checkbox>
              );
            })}
          </Checkbox.Group>
        );

      case FORM_ITEM_RENDER_ENUM.DATE:
        return <DatePicker placeholder={placeholder} format="YYYY-MM-DD" style={{ width: "100%" }} {...componentProps} />;

      case FORM_ITEM_RENDER_ENUM.DATE_MONTH:
        return <DatePicker picker="month" placeholder={placeholder} format="YYYY-MM" style={{ width: "100%" }} {...componentProps} />;

      case FORM_ITEM_RENDER_ENUM.DATE_YEAR:
        return <DatePicker picker="year" placeholder={placeholder} format="YYYY" style={{ width: "100%" }} {...componentProps} />;

      case FORM_ITEM_RENDER_ENUM.DATE_WEEK:
        return <DatePicker picker="week" placeholder={placeholder} format="YYYY-wo" style={{ width: "100%" }} {...componentProps} />;

      case FORM_ITEM_RENDER_ENUM.DATE_RANGE:
        return (
          <RangePicker
            placeholder={[`请选择开始${option.label}`, `请选择结束${option.label}`]}
            format="YYYY-MM-DD"
            style={{ width: "100%" }}
            {...componentProps}
          />
        );

      case FORM_ITEM_RENDER_ENUM.DATETIME:
        return (
          <DatePicker
            showTime
            placeholder={placeholder}
            format="YYYY-MM-DD HH:mm:ss"
            style={{ width: "100%" }}
            {...componentProps}
          />
        );

      case FORM_ITEM_RENDER_ENUM.DATETIME_RANGE:
        return (
          <RangePicker
            showTime
            placeholder={[`请选择开始${option.label}`, `请选择结束${option.label}`]}
            format="YYYY-MM-DD HH:mm:ss"
            style={{ width: "100%" }}
            {...componentProps}
          />
        );

      case FORM_ITEM_RENDER_ENUM.DIVIDER:
        return null;

      default:
        // 支持传入自定义组件
        if (typeof render === "function") {
          const CustomComponent = render;
          return <CustomComponent {...componentProps} />;
        }
        return <Input placeholder={placeholder} {...componentProps} />;
    }
  };

  // 渲染 label（带提示）
  const renderLabel = (option) => {
    if (!option.tip)
      return option.label;

    return (
      <>
        {option.label}
        <Tooltip title={option.tip}>
          <InfoCircleOutlined style={{ marginLeft: 4, fontSize: 12 }} />
        </Tooltip>
      </>
    );
  };

  return (
    <>
      {options.map((option, index) => {
        const itemSpan = option.render === FORM_ITEM_RENDER_ENUM.DIVIDER ? 24 : option.span ?? span;
        // 使用 style 控制显示/隐藏
        const style = collapse && index >= 3 ? { display: "none" } : undefined;

        // 如果是分割线
        if (option.render === FORM_ITEM_RENDER_ENUM.DIVIDER) {
          return (
            <Col key={option.name || index} span={itemSpan} style={style}>
              <Divider orientation="left">{option.label}</Divider>
            </Col>
          );
        }

        // 如果配置了 shouldUpdate 或 dependencies，使用 Form.Item 的联动机制
        if ((option.shouldUpdate ?? option.dependencies) || (option?.componentProps?.shouldUpdate ?? option?.componentProps?.dependencies)) {
          return (
            option.customizeRender
              ? (renderFormControl(option))
              : (
                  <Col key={option.name || index} span={itemSpan} style={style}>
                    <Form.Item
                      noStyle
                      shouldUpdate={option.shouldUpdate ?? option?.componentProps?.shouldUpdate}
                      dependencies={option.dependencies || option?.componentProps?.dependencies}
                    >
                      {(form) => {
                      // 支持动态计算 hidden
                        const hidden = typeof option.hidden === "function"
                          ? option.hidden(form.getFieldsValue())
                          : (option.hidden ?? false);

                        if (hidden)
                          return null;

                        return (
                          <Form.Item
                            name={option.name}
                            label={renderLabel(option)}
                            rules={getRules(option)}
                            labelCol={option.labelCol}
                            wrapperCol={option.wrapperCol}
                            {...getFormItemProps(option)}
                          >
                            {renderFormControl(option)}
                          </Form.Item>
                        );
                      }}
                    </Form.Item>
                  </Col>
                )
          );
        }

        // 普通表单项（静态配置）
        if (option.hidden)
          return null;

        return (
          option.customizeRender
            ? (renderFormControl(option))
            : (
                <Col key={option.name || index} span={itemSpan} style={style}>
                  <Form.Item
                    name={option.name}
                    label={renderLabel(option)}
                    rules={getRules(option)}
                    labelCol={option.labelCol}
                    wrapperCol={option.wrapperCol}
                    {...getFormItemProps(option)}
                  >
                    {renderFormControl(option)}
                  </Form.Item>
                </Col>
              )
        );
      })}
    </>
  );
};

FormItemsRenderer.displayName = "FormItemsRenderer";

export default FormItemsRenderer;