import React from 'react';
import {
  VisibilityRule,
  VisibilityOperator,
  VisibilityRuleTarget,
  ValueExtractConfig,
  VISIBILITY_OPERATOR_LABELS,
  VISIBILITY_RULE_TARGET_LABELS,
} from '../types';
import { visibilityOperatorNeedsValue, valueExtractConfigHasExtract } from '../utils';
import { FieldSelect } from './PsSelect';
import { ValueExtractFields } from './ValueExtractFields';
import { TextDisplayAffixFields } from './TextDisplayAffixFields';

export interface VisibilityRuleDraft extends ValueExtractConfig {
  target: VisibilityRuleTarget;
  variable: string;
  operator: VisibilityOperator;
  value?: string;
}

interface VisibilityRuleFormProps {
  rule: VisibilityRuleDraft;
  onChange: (patch: Partial<VisibilityRule>) => void;
  variableOptions: string[];
  /** 为 true 时仅支持按变量判断（如批量导出过滤） */
  variableOnly?: boolean;
}

export const VisibilityRuleForm: React.FC<VisibilityRuleFormProps> = ({
  rule,
  onChange,
  variableOptions,
  variableOnly = false,
}) => {
  const target = variableOnly ? 'variable' : (rule.target ?? 'variable');
  const hasExtract = valueExtractConfigHasExtract(rule);

  return (
    <div className="space-y-3">
      {!variableOnly && (
        <div>
          <label className="ps-field-label">条件对象</label>
          <FieldSelect
            value={target}
            onChange={(e) => {
              const nextTarget = e.target.value as VisibilityRuleTarget;
              onChange({
                target: nextTarget,
                variable: nextTarget === 'content' ? '' : rule.variable,
              });
            }}
            className="ps-field text-[11px] w-full mt-0.5"
          >
            {(Object.keys(VISIBILITY_RULE_TARGET_LABELS) as VisibilityRuleTarget[]).map((t) => (
              <option key={t} value={t}>
                {VISIBILITY_RULE_TARGET_LABELS[t]}
              </option>
            ))}
          </FieldSelect>
        </div>
      )}
      {target === 'variable' ? (
        <div>
          <label className="ps-field-label">变量</label>
          <FieldSelect
            value={rule.variable}
            onChange={(e) => onChange({ variable: e.target.value })}
            className="ps-field text-[11px] w-full mt-0.5"
          >
            {!rule.variable && <option value="">请选择变量</option>}
            {variableOptions.map((v) => (
              <option key={v} value={v}>
                {v}
              </option>
            ))}
          </FieldSelect>
          {variableOptions.length === 0 && (
            <p className="text-[9px] text-[#666] mt-1 leading-relaxed">
              {variableOnly
                ? '请先在模板中添加变量后再设置过滤条件'
                : '请先在「变量管理」中添加变量，或改用「内容值」作为条件对象'}
            </p>
          )}
        </div>
      ) : (
        !variableOnly && (
          <p className="text-[9px] text-[#666] leading-relaxed">
            使用本元素绑定内容的变量替换与数值格式化结果（不含元素自身的值提取与显示前后缀）
          </p>
        )
      )}
      <div className="pt-2 border-t border-[#3a3a3a] space-y-2">
        <div className="text-[10px] font-bold text-[#31a8ff]">值提取</div>
        <ValueExtractFields config={rule} onChange={onChange} />
        {hasExtract && rule.textExtractInverse && (
          <TextDisplayAffixFields
            elem={{
              id: '',
              type: 'text',
              name: '',
              x: 0,
              y: 0,
              width: 0,
              height: 0,
              content: '',
              fontSize: 10,
              textAlign: 'left',
              fontWeight: 'normal',
              barcodeFormat: 'CODE128',
              showText: true,
              fontFamily: 'sans',
              textDisplayPrefix: rule.textDisplayPrefix,
              textDisplaySuffix: rule.textDisplaySuffix,
            }}
            onChange={(patch) =>
              onChange({
                textDisplayPrefix: patch.textDisplayPrefix,
                textDisplaySuffix: patch.textDisplaySuffix,
              })
            }
          />
        )}
        {hasExtract && !rule.textExtractInverse && (
          <p className="text-[9px] text-[#666] leading-relaxed">
            条件判断前先对{target === 'content' ? '内容值' : '变量值'}做提取，再与目标值比较
          </p>
        )}
      </div>
      <div>
        <label className="ps-field-label">条件</label>
        <FieldSelect
          value={rule.operator}
          onChange={(e) => {
            const operator = e.target.value as VisibilityOperator;
            onChange({
              operator,
              value: visibilityOperatorNeedsValue(operator) ? rule.value : undefined,
            });
          }}
          className="ps-field text-[11px] w-full mt-0.5"
        >
          {(Object.keys(VISIBILITY_OPERATOR_LABELS) as VisibilityOperator[]).map((op) => (
            <option key={op} value={op}>
              {VISIBILITY_OPERATOR_LABELS[op]}
            </option>
          ))}
        </FieldSelect>
      </div>
      {visibilityOperatorNeedsValue(rule.operator) && (
        <div>
          <div className="flex items-center justify-between gap-2">
            <label className="ps-field-label">目标值</label>
            <button
              type="button"
              disabled={!rule.value}
              onClick={() => onChange({ value: '' })}
              className="text-[9px] text-[#31a8ff] hover:underline cursor-pointer disabled:opacity-40 disabled:cursor-not-allowed disabled:no-underline shrink-0"
            >
              清空
            </button>
          </div>
          <input
            type="text"
            value={rule.value ?? ''}
            onChange={(e) => onChange({ value: e.target.value })}
            placeholder="比较目标值，可使用 {变量名}"
            className="ps-field font-mono text-[11px] w-full mt-0.5"
          />
          {variableOptions.length > 0 && (
            <div className="flex flex-wrap gap-1 mt-1.5">
              {variableOptions.map((v) => (
                <button
                  key={v}
                  type="button"
                  onClick={() => {
                    const token = `{${v}}`;
                    const current = rule.value ?? '';
                    onChange({
                      value: current.includes(token)
                        ? current
                        : current
                          ? `${current}${current.endsWith(' ') ? '' : ' '}${token}`
                          : token,
                    });
                  }}
                  className="ps-btn text-[9px] font-mono"
                >
                  {`{${v}}`}
                </button>
              ))}
            </div>
          )}
          <p className="text-[9px] text-[#666] mt-1 leading-relaxed">
            支持字面量或 {`{变量名}`}；导出时按数据行解析变量后再比较
          </p>
        </div>
      )}
    </div>
  );
};