package jnpf.elnService.cross.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import jnpf.elnEntity.field.ElnFieldVersionEntity;
import jnpf.elnEntity.template.ElnTemplateCrossReferenceEntity;
import jnpf.elnEntity.template.ElnTemplateVos;
import jnpf.elnMapper.ElnFieldVersionMapper;
import jnpf.elnMapper.ElnTemplateCrossReferenceMapper;
import jnpf.elnService.template.ElnTemplateBindingDependencyValidator;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;

/** Keeps a cross-template rule attached to the PRIMARY binding it decorates. */
@Service
public class ElnCrossTemplateBindingDependencyValidator implements ElnTemplateBindingDependencyValidator {
    private final ElnTemplateCrossReferenceMapper references;
    private final ElnFieldVersionMapper fieldVersions;

    public ElnCrossTemplateBindingDependencyValidator(ElnTemplateCrossReferenceMapper references,
            ElnFieldVersionMapper fieldVersions) {
        this.references = references;
        this.fieldVersions = fieldVersions;
    }

    @Override
    public List<ElnTemplateVos.Diagnostic> validateUpgrade(String tenantId, String templateId,
            Set<String> bindingIds, String targetFieldVersionId) {
        ElnFieldVersionEntity target = fieldVersions.selectOne(Wrappers.<ElnFieldVersionEntity>lambdaQuery()
                .eq(ElnFieldVersionEntity::getFTenantId, tenantId).eq(ElnFieldVersionEntity::getId, targetFieldVersionId)
                .eq(ElnFieldVersionEntity::getFDeleteMark, 0));
        if (target == null) return Collections.singletonList(error("CROSS_TEMPLATE_TARGET_VERSION_INVALID", "目标字段版本不存在", null));
        List<ElnTemplateVos.Diagnostic> result = new ArrayList<>();
        for (ElnTemplateCrossReferenceEntity rule : rules(tenantId, bindingIds)) {
            ElnFieldVersionEntity source = fieldVersions.selectOne(Wrappers.<ElnFieldVersionEntity>lambdaQuery()
                    .eq(ElnFieldVersionEntity::getFTenantId, tenantId)
                    .eq(ElnFieldVersionEntity::getId, rule.getLaiyuanZiduanBanbenId())
                    .eq(ElnFieldVersionEntity::getFDeleteMark, 0));
            if (source == null || !source.getZiduanDingyiId().equals(rule.getLaiyuanZiduanDingyiId())
                    || !source.getShujuLeixing().equals(target.getShujuLeixing())) {
                result.add(error("CROSS_TEMPLATE_TARGET_TYPE_MISMATCH", "跨模板字段升级后必须保持与固定来源相同的类型", rule.getMubanBangdingId()));
            }
        }
        return result;
    }

    @Override
    public List<ElnTemplateVos.Diagnostic> validateRemoval(String tenantId, String templateId, Set<String> bindingIds) {
        List<ElnTemplateVos.Diagnostic> result = new ArrayList<>();
        for (ElnTemplateCrossReferenceEntity rule : rules(tenantId, bindingIds))
            result.add(error("CROSS_TEMPLATE_RULE_ATTACHED", "跨模板字段仍有取值规则，不能移除或修复为其他字段", rule.getMubanBangdingId()));
        return result;
    }

    @Override
    public List<ElnTemplateVos.Diagnostic> validatePromotion(String tenantId, String templateId,
            String primaryBindingId, String referenceBindingId) {
        return validateRemoval(tenantId, templateId, Collections.singleton(primaryBindingId));
    }

    @Override
    public List<ElnTemplateVos.Diagnostic> validateCheckboxGroup(
            String tenantId, String templateId, String bindingId) {
        List<ElnTemplateCrossReferenceEntity> attached = rules(
                tenantId, Collections.singleton(bindingId));
        if (attached.isEmpty()) {
            return Collections.emptyList();
        }
        return Collections.singletonList(error(
                "CHECKBOX_GROUP_CROSS_TEMPLATE_READ_ONLY",
                "跨模板只读字段不能加入选择组", bindingId));
    }

    private List<ElnTemplateCrossReferenceEntity> rules(String tenantId, Set<String> bindingIds) {
        if (bindingIds == null || bindingIds.isEmpty()) return Collections.emptyList();
        List<ElnTemplateCrossReferenceEntity> result = references.selectList(Wrappers.<ElnTemplateCrossReferenceEntity>lambdaQuery()
                .eq(ElnTemplateCrossReferenceEntity::getFTenantId, tenantId)
                .eq(ElnTemplateCrossReferenceEntity::getFDeleteMark, 0)
                .in(ElnTemplateCrossReferenceEntity::getMubanBangdingId, bindingIds));
        return result == null ? Collections.emptyList() : result;
    }

    private static ElnTemplateVos.Diagnostic error(String code, String message, String bindingId) {
        ElnTemplateVos.Diagnostic diagnostic = new ElnTemplateVos.Diagnostic();
        diagnostic.setSeverity("ERROR"); diagnostic.setCode(code); diagnostic.setMessage(message); diagnostic.setBindingId(bindingId);
        return diagnostic;
    }
}