package jnpf.elnService.cross.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import jnpf.elnEntity.field.ElnFieldDefEntity;
import jnpf.elnEntity.field.ElnFieldVersionEntity;
import jnpf.elnEntity.template.ElnTemplateBindingEntity;
import jnpf.elnEntity.template.ElnTemplateCrossReferenceEntity;
import jnpf.elnEntity.template.ElnTemplateVersionEntity;
import jnpf.elnEntity.template.ElnTemplateVos;
import jnpf.elnMapper.ElnFieldDefMapper;
import jnpf.elnMapper.ElnFieldVersionMapper;
import jnpf.elnMapper.ElnTemplateBindingMapper;
import jnpf.elnMapper.ElnTemplateCrossReferenceMapper;
import jnpf.elnMapper.ElnTemplateMapper;
import jnpf.elnService.cross.ElnCrossTemplateScalarReferencePolicy;
import jnpf.elnService.template.ElnTemplatePublishValidator;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

/** Publication is the final gate for rule lineage and unsupported template dependency chains. */
@Service
public class ElnCrossTemplatePublishValidator implements ElnTemplatePublishValidator {
    private final ElnTemplateMapper templates;
    private final ElnTemplateBindingMapper bindings;
    private final ElnTemplateCrossReferenceMapper references;
    private final ElnFieldDefMapper fieldDefinitions;
    private final ElnFieldVersionMapper fieldVersions;

    public ElnCrossTemplatePublishValidator(ElnTemplateMapper templates, ElnTemplateBindingMapper bindings,
            ElnTemplateCrossReferenceMapper references, ElnFieldDefMapper fieldDefinitions,
            ElnFieldVersionMapper fieldVersions) {
        this.templates = templates;
        this.bindings = bindings;
        this.references = references;
        this.fieldDefinitions = fieldDefinitions;
        this.fieldVersions = fieldVersions;
    }

    @Override
    public List<ElnTemplateVos.Diagnostic> validate(String tenantId, String templateId) {
        List<ElnTemplateVos.Diagnostic> result = new ArrayList<>();
        ElnTemplateVersionEntity target = template(tenantId, templateId);
        if (target == null || !StringUtils.hasText(target.getMubanBianhao())) return result;
        List<ElnTemplateCrossReferenceEntity> all = liveRules(tenantId);
        Map<String, ElnTemplateBindingEntity> bindingById = new LinkedHashMap<>();
        for (ElnTemplateBindingEntity binding : liveBindings(tenantId)) bindingById.put(binding.getId(), binding);
        for (ElnTemplateCrossReferenceEntity rule : all) {
            ElnTemplateBindingEntity binding = bindingById.get(rule.getMubanBangdingId());
            if (binding == null || !templateId.equals(binding.getMubanId())) continue;
            if (!"ACTIVE".equals(binding.getBangdingZhuangtai())) continue;
            if (!"PRIMARY".equals(binding.getKongjianJuese())
                    || StringUtils.hasText(binding.getRepeatGroupCode())) {
                result.add(error("CROSS_TEMPLATE_TARGET_INVALID", "跨模板规则必须绑定当前模板的活动普通主字段", binding.getId()));
            }
            ElnTemplateVersionEntity sourceTemplate = template(tenantId, rule.getLaiyuanMubanId());
            ElnFieldDefEntity sourceField = fieldDefinition(
                    tenantId, rule.getLaiyuanZiduanDingyiId());
            ElnFieldVersionEntity sourceVersion = fieldVersion(tenantId, rule.getLaiyuanZiduanBanbenId());
            ElnTemplateBindingEntity sourceBinding = sourceBinding(
                    rule, bindingById.values());
            if (sourceTemplate == null || !"PUBLISHED".equals(sourceTemplate.getBizStatus())
                    || !"enabled".equals(sourceTemplate.getBizEnabled())
                    || !rule.getLaiyuanMubanBianhao().equals(sourceTemplate.getMubanBianhao())
                    || sourceField == null || !"enabled".equals(sourceField.getBizEnabled())
                    || sourceVersion == null
                    || !rule.getLaiyuanZiduanDingyiId().equals(sourceVersion.getZiduanDingyiId())
                    || !ElnCrossTemplateScalarReferencePolicy.isEligible(
                    templateId, sourceTemplate.getId(), sourceTemplate.getBizStatus(),
                    sourceField.getZuoyongFanwei(), sourceVersion, sourceBinding)) {
                result.add(error("CROSS_TEMPLATE_SOURCE_INVALID", "跨模板来源模板或精确字段版本已失效", binding == null ? null : binding.getId()));
            }
        }
        Map<String, List<String>> graph = graph(all, bindingById);
        List<String> path = new ArrayList<>(); path.add(target.getMubanBianhao());
        inspectPath(target.getMubanBianhao(), graph, path, new LinkedHashSet<>(), result);
        return result;
    }

    private static void inspectPath(String node, Map<String, List<String>> graph, List<String> path,
            Set<String> visiting, List<ElnTemplateVos.Diagnostic> result) {
        if (!visiting.add(node)) return;
        for (String next : graph.getOrDefault(node, Collections.emptyList())) {
            List<String> candidate = new ArrayList<>(path); candidate.add(next);
            if (path.contains(next)) {
                result.add(error("CROSS_TEMPLATE_DEPENDENCY_CYCLE", "跨模板字段引用存在循环：" + join(candidate), null));
            } else if (candidate.size() > 2) {
                result.add(error("CROSS_TEMPLATE_INDIRECT_CHAIN", "跨模板字段引用不支持间接链：" + join(candidate), null));
            } else {
                inspectPath(next, graph, candidate, visiting, result);
            }
        }
        visiting.remove(node);
    }

    private static Map<String, List<String>> graph(List<ElnTemplateCrossReferenceEntity> rules,
            Map<String, ElnTemplateBindingEntity> bindingById) {
        Map<String, List<String>> result = new LinkedHashMap<>();
        for (ElnTemplateCrossReferenceEntity rule : rules) {
            ElnTemplateBindingEntity binding = bindingById.get(rule.getMubanBangdingId());
            if (binding != null && "ACTIVE".equals(binding.getBangdingZhuangtai())
                    && StringUtils.hasText(binding.getMubanBianhao())
                    && StringUtils.hasText(rule.getLaiyuanMubanBianhao())) {
                result.computeIfAbsent(binding.getMubanBianhao(), ignored -> new ArrayList<>()).add(rule.getLaiyuanMubanBianhao());
            }
        }
        return result;
    }

    private List<ElnTemplateCrossReferenceEntity> liveRules(String tenantId) {
        List<ElnTemplateCrossReferenceEntity> result = references.selectList(Wrappers.<ElnTemplateCrossReferenceEntity>lambdaQuery()
                .eq(ElnTemplateCrossReferenceEntity::getFTenantId, tenantId).eq(ElnTemplateCrossReferenceEntity::getFDeleteMark, 0));
        return result == null ? Collections.emptyList() : result;
    }
    private List<ElnTemplateBindingEntity> liveBindings(String tenantId) {
        List<ElnTemplateBindingEntity> result = bindings.selectList(Wrappers.<ElnTemplateBindingEntity>lambdaQuery()
                .eq(ElnTemplateBindingEntity::getFTenantId, tenantId).eq(ElnTemplateBindingEntity::getFDeleteMark, 0));
        return result == null ? Collections.emptyList() : result;
    }
    private ElnTemplateVersionEntity template(String tenantId, String id) { return templates.selectOne(Wrappers.<ElnTemplateVersionEntity>lambdaQuery().eq(ElnTemplateVersionEntity::getFTenantId, tenantId).eq(ElnTemplateVersionEntity::getId, id).eq(ElnTemplateVersionEntity::getFDeleteMark, 0)); }
    private ElnFieldDefEntity fieldDefinition(String tenantId, String id) { return fieldDefinitions.selectOne(Wrappers.<ElnFieldDefEntity>lambdaQuery().eq(ElnFieldDefEntity::getFTenantId, tenantId).eq(ElnFieldDefEntity::getId, id).eq(ElnFieldDefEntity::getFDeleteMark, 0)); }
    private ElnFieldVersionEntity fieldVersion(String tenantId, String id) { return fieldVersions.selectOne(Wrappers.<ElnFieldVersionEntity>lambdaQuery().eq(ElnFieldVersionEntity::getFTenantId, tenantId).eq(ElnFieldVersionEntity::getId, id).eq(ElnFieldVersionEntity::getFDeleteMark, 0)); }
    private static ElnTemplateBindingEntity sourceBinding(ElnTemplateCrossReferenceEntity rule,
            Iterable<ElnTemplateBindingEntity> bindings) {
        for (ElnTemplateBindingEntity binding : bindings) {
            if (rule.getLaiyuanMubanId().equals(binding.getMubanId())
                    && rule.getLaiyuanZiduanDingyiId().equals(binding.getZiduanDingyiId())
                    && rule.getLaiyuanZiduanBanbenId().equals(binding.getZiduanBanbenId())
                    && "ACTIVE".equals(binding.getBangdingZhuangtai())
                    && "PRIMARY".equals(binding.getKongjianJuese())
                    && !StringUtils.hasText(binding.getRepeatGroupCode())) return binding;
        }
        return null;
    }
    private static String join(List<String> path) { return String.join(" -> ", path); }
    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; }
}