package com.lingyue.graph.service;

import com.lingyue.graph.dto.BatchCreateNodesRequest;
import com.lingyue.graph.dto.BatchCreateRelationsRequest;
import com.lingyue.graph.dto.CreateNodeRequest;
import com.lingyue.graph.dto.CreateRelationRequest;
import com.lingyue.graph.entity.GraphNode;
import com.lingyue.graph.entity.GraphRelation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.util.*;

/**
 * 图节点服务（存根）
 * graph_nodes / graph_relations 表已移除，仅保留空实现以兼容 API。
 *
 * @author lingyue
 * @since 2026-01-19
 */
@Slf4j
@Service
public class GraphNodeService {

    // ==================== 节点操作（不持久化） ====================

    public GraphNode createNode(CreateNodeRequest request) {
        GraphNode node = new GraphNode();
        node.setId(UUID.randomUUID().toString().replace("-", ""));
        node.setDocumentId(request.getDocumentId());
        node.setUserId(request.getUserId());
        node.setName(request.getName());
        node.setType(request.getType());
        node.setValue(request.getValue());
        node.setPosition(request.getPosition());
        node.setParentId(request.getParentId());
        node.setLevel(request.getLevel() != null ? request.getLevel() : 0);
        node.setMetadata(request.getMetadata());
        node.setCreateTime(new Date());
        node.setUpdateTime(new Date());
        log.debug("图节点表已移除，createNode 仅返回内存对象: id={}", node.getId());
        return node;
    }

    public List<GraphNode> batchCreateNodes(BatchCreateNodesRequest request) {
        if (request.getNodes() == null || request.getNodes().isEmpty()) {
            return Collections.emptyList();
        }
        List<GraphNode> created = new ArrayList<>();
        for (CreateNodeRequest req : request.getNodes()) {
            if (req.getDocumentId() == null) req.setDocumentId(request.getDocumentId());
            if (req.getUserId() == null) req.setUserId(request.getUserId());
            created.add(createNode(req));
        }
        return created;
    }

    public GraphNode getNodeById(String nodeId) {
        return null;
    }

    public List<GraphNode> getNodesByDocumentId(String documentId) {
        return Collections.emptyList();
    }

    public List<GraphNode> getNodesByDocumentIdAndType(String documentId, String type) {
        return Collections.emptyList();
    }

    public List<GraphNode> getNodesByUserId(String userId) {
        return Collections.emptyList();
    }

    public GraphNode updateNode(String nodeId, CreateNodeRequest request) {
        log.debug("图节点表已移除，updateNode 忽略: nodeId={}", nodeId);
        return null;
    }

    public void deleteNode(String nodeId) {
        log.debug("图节点表已移除，deleteNode 忽略: nodeId={}", nodeId);
    }

    public int deleteNodesByDocumentId(String documentId) {
        return 0;
    }

    // ==================== 关系操作（不持久化） ====================

    public GraphRelation createRelation(CreateRelationRequest request) {
        GraphRelation relation = new GraphRelation();
        relation.setId(UUID.randomUUID().toString().replace("-", ""));
        relation.setFromNodeId(request.getFromNodeId());
        relation.setToNodeId(request.getToNodeId());
        relation.setRelationType(request.getRelationType());
        relation.setActionType(request.getActionType());
        relation.setActionConfig(request.getActionConfig());
        relation.setOrderIndex(request.getOrderIndex() != null ? request.getOrderIndex() : 0);
        relation.setConditionExpr(request.getConditionExpr());
        relation.setMetadata(request.getMetadata());
        relation.setCreateTime(new Date());
        relation.setUpdateTime(new Date());
        log.debug("图关系表已移除，createRelation 仅返回内存对象: id={}", relation.getId());
        return relation;
    }

    public List<GraphRelation> batchCreateRelations(BatchCreateRelationsRequest request) {
        if (request.getRelations() == null || request.getRelations().isEmpty()) {
            return Collections.emptyList();
        }
        List<GraphRelation> created = new ArrayList<>();
        for (CreateRelationRequest req : request.getRelations()) {
            created.add(createRelation(req));
        }
        return created;
    }

    public GraphRelation getRelationById(String relationId) {
        return null;
    }

    public List<GraphRelation> getRelationsByFromNodeId(String fromNodeId) {
        return Collections.emptyList();
    }

    public List<GraphRelation> getRelationsByToNodeId(String toNodeId) {
        return Collections.emptyList();
    }

    public List<GraphRelation> getRelationsByNodeId(String nodeId) {
        return Collections.emptyList();
    }

    public void deleteRelation(String relationId) {
        log.debug("图关系表已移除，deleteRelation 忽略: relationId={}", relationId);
    }

    public Map<String, Object> getNodeStatsByDocumentId(String documentId) {
        Map<String, Object> stats = new HashMap<>();
        stats.put("totalNodes", 0);
        stats.put("typeDistribution", Collections.emptyMap());
        return stats;
    }

    public Map<String, Object> getRelationStatsByDocumentId(String documentId) {
        Map<String, Object> stats = new HashMap<>();
        stats.put("totalRelations", 0);
        stats.put("typeDistribution", Collections.emptyMap());
        return stats;
    }
}