import json
import traceback
from app import app
from robyn import jsonify, Response
from service.OperationService import OperationService
from urllib.parse import unquote

# 实例化业务逻辑对象
operation_service = OperationService()


# 2. 新增/替换这个深度转换函数
def deep_convert(data):
    """
    专门解决 Neo4j 对象序列化问题的工具函数
    """
    if isinstance(data, dict):
        return {k: deep_convert(v) for k, v in data.items()}
    elif isinstance(data, list):
        return [deep_convert(i) for i in data]
    # 增加对数值类型的保护，其他的全部转为字符串
    elif isinstance(data, (int, float, bool, type(None))):
        return data
    elif isinstance(data, str):
        return data
    # 如果是 Neo4j 的 ID、Long 或其他不可识别对象，一律强转字符串
    else:
        try:
            return str(data)
        except:
            return None

# 3. 替换原来的 create_response
def create_response(status_code, data_dict):
    """
    统一响应格式封装。
    不再直接用 jsonify(data_dict)，因为那处理不了嵌套的 Neo4j 对象。
    """
    # 第一步：清洗数据，把所有特殊对象转为标准 Python 类型
    clean_data = deep_convert(data_dict)

    # 第二步：手动序列化，确保中文不乱码，且 elementId 等长字符串不被截断
    return Response(
        status_code=status_code,
        description=json.dumps(clean_data, ensure_ascii=False),
        headers={"Content-Type": "application/json; charset=utf-8"}
    )


def parse_request_body(req):
    """
    解析器：适配 Robyn 框架。
    针对前端 Vue3 + ElementPlus 的请求进行深度解析，确保获取 ID、nodeId、name 和 label。
    """
    try:
        body = getattr(req, "body", None)
        if not body:
            return {}

        # 1. 处理 bytes 类型 (Robyn 常见的 body 类型)
        if isinstance(body, (bytes, bytearray)):
            body = body.decode('utf-8')

        # 2. 如果已经是字典，直接返回
        if isinstance(body, dict):
            return body

        # 3. 处理字符串 (JSON 序列化后的字符串)
        if isinstance(body, str):
            try:
                data = json.loads(body)
                # 处理双层 JSON 序列化的情况 (有些前端框架会序列化两次)
                if isinstance(data, str):
                    data = json.loads(data)
                return data
            except json.JSONDecodeError:
                # 尝试解析 URL 编码格式 (application/x-www-form-urlencoded)
                try:
                    from urllib.parse import parse_qs
                    params = parse_qs(body)
                    return {k: v[0] for k, v in params.items()}
                except:
                    return {}
        return {}
    except Exception as e:
        print(f"Request Body Parse Error: {e}")
        return {}


def get_query_param(req, key, default=""):
    """
    提取 URL 查询参数。适配不同版本的 Robyn 参数存放位置。
    """
    try:
        # 尝试从新版/旧版 Robyn 的不同属性中提取
        data_source = getattr(req, "queries", None)
        if data_source is None or (isinstance(data_source, dict) and not data_source):
            data_source = getattr(req, "query_params", {})

        # 适配 Robyn 特有的 Query 对象
        if hasattr(data_source, "to_dict"):
            data_source = data_source.to_dict()

        val = data_source.get(key)
        if val is None:
            return default

        # 提取值并进行 URL 解码
        raw_val = str(val[0]) if isinstance(val, list) else str(val)
        return unquote(raw_val).strip()
    except Exception as e:
        print(f"Get Param Error ({key}): {e}")
        return default


# --- 0. 数据治理修复接口 ---
@app.post("/api/kg/admin/fix-ids")
def fix_node_ids(req):
    """
    手动触发：修复数据库中 nodeId 为空或为 0 的存量数据
    """
    try:
        result = operation_service.fix_all_missing_node_ids()
        return create_response(200, {
            "code": 200 if result.get("success") else 500,
            "msg": result.get("msg")
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"修复接口异常: {str(e)}"})


# --- 1. 获取全量动态标签 (节点管理用) ---
@app.get("/api/kg/labels")
def get_labels(req):
    try:
        labels = operation_service.get_all_labels()
        return create_response(200, {"code": 200, "data": labels, "msg": "success"})
    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"获取标签失败: {str(e)}"})


# --- 新增：获取全量动态关系类型  ---
@app.get("/api/kg/relationship-types")
def get_rel_types(req):
    """
    从数据库动态获取所有关系类型 type 及其 label 映射
    """
    try:
        rel_types = operation_service.get_all_relationship_types()
        return create_response(200, {"code": 200, "data": rel_types, "msg": "success"})
    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"获取关系类型失败: {str(e)}"})


# --- 2. 输入联想建议 ---
@app.get("/api/kg/node/suggest")
def suggest_node(req):
    """
    联想词接口：
    支持 keyword 模糊搜索，同时支持 label 强过滤。
    """
    try:
        # 1. 提取前端传来的参数
        clean_keyword = get_query_param(req, "keyword", "")
        clean_label = get_query_param(req, "label", "")

        # 2. 调用 Service 层
        # 如果 label 为 "全部" 或空，Service 层会自动处理成全库建议
        suggestions = operation_service.suggest_nodes(clean_keyword, clean_label)

        return create_response(200, {"code": 200, "data": suggestions, "msg": "success"})
    except Exception as e:
        print(f"Suggest Interface Error: {e}")
        return create_response(200, {"code": 500, "msg": f"联想接口异常: {str(e)}"})


# --- 3. 获取分页节点列表 ---
@app.get("/api/kg/nodes")
def get_nodes(req):
    try:
        name_raw = get_query_param(req, "name", "")
        label_raw = get_query_param(req, "label", "")
        page_str = get_query_param(req, "page", "1")
        size_str = get_query_param(req, "pageSize", "20")

        page = int(page_str) if page_str.isdigit() else 1
        page_size = int(size_str) if size_str.isdigit() else 20

        # 清洗参数
        name = name_raw if name_raw else None
        label = label_raw if (label_raw and label_raw not in ["全部", "", "null"]) else None

        res_data = operation_service.get_nodes_subset(page, page_size, name=name, label=label)
        return create_response(200, {"code": 200, "data": res_data, "msg": "success"})
    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"获取节点失败: {str(e)}"})


# --- 4. 获取分页关系列表 ---
@app.get("/api/kg/relationships")
def get_relationships(req):
    try:
        source_raw = get_query_param(req, "source", "")
        target_raw = get_query_param(req, "target", "")
        type_raw = get_query_param(req, "type", "")
        page_str = get_query_param(req, "page", "1")
        size_str = get_query_param(req, "pageSize", "20")

        page = int(page_str) if page_str.isdigit() else 1
        page_size = int(size_str) if size_str.isdigit() else 20

        source = source_raw if source_raw else None
        target = target_raw if target_raw else None
        rel_type = type_raw if (type_raw and type_raw not in ["全部", ""]) else None

        res_data = operation_service.get_relationships_subset(page, page_size, source, target, rel_type)
        return create_response(200, {"code": 200, "data": res_data, "msg": "success"})
    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"获取关系失败: {str(e)}"})


# --- 5. 新增节点 ---
@app.post("/api/kg/node/add")
def add_node(req):
    try:
        body = parse_request_body(req)
        label = str(body.get("label", "Drug")).strip()
        name = str(body.get("name", "")).strip()

        if not name:
            return create_response(200, {"code": 400, "msg": "名称不能为空"})

        result = operation_service.add_node(label, name)
        return create_response(200, {
            "code": 200 if result.get("success") else 400,
            "msg": result.get("msg")
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"新增异常: {str(e)}"})


# --- 6. 修改节点 ---
@app.post("/api/kg/node/update")
def update_node(req):
    try:
        body = parse_request_body(req)
        # 兼容两种写法：id (elementId) 或 nodeId (业务ID)
        node_id = body.get("id") or body.get("nodeId")
        name = str(body.get("name", "")).strip()
        label = str(body.get("label", "")).strip()

        if not node_id or not name:
            return create_response(200, {"code": 400, "msg": "参数缺失: 修改必须包含ID和名称"})

        result = operation_service.update_node(node_id, name, label)
        return create_response(200, {
            "code": 200 if result.get("success") else 400,
            "msg": result.get("msg")
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"更新异常: {str(e)}"})


# --- 7. 新增关系 ---
@app.post("/api/kg/rel/add")
def add_relationship(req):
    try:
        body = parse_request_body(req)
        source = str(body.get("source", "")).strip()
        target = str(body.get("target", "")).strip()
        rel_type = str(body.get("type", "")).strip()
        rel_label = str(body.get("label", "")).strip() or rel_type

        if not all([source, target, rel_type]):
            return create_response(200, {"code": 400, "msg": "参数缺失: 起点、终点和类型为必填项"})

        result = operation_service.add_relationship(source, target, rel_type, rel_label)
        return create_response(200, {
            "code": 200 if result.get("success") else 400,
            "msg": result.get("msg")
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"新增关系异常: {str(e)}"})


# --- 8. 修改关系 ---
@app.post("/api/kg/rel/update")
def update_rel(req):
    try:
        body = parse_request_body(req)
        rel_id = body.get("id")
        source = str(body.get("source", "")).strip()
        target = str(body.get("target", "")).strip()
        rel_type = str(body.get("type", "")).strip()
        rel_label = str(body.get("label", "")).strip() or rel_type

        if not rel_id:
            return create_response(200, {"code": 400, "msg": "修改失败：关系ID缺失"})

        result = operation_service.update_relationship(rel_id, source, target, rel_type, rel_label)
        return create_response(200, {
            "code": 200 if result.get("success") else 400,
            "msg": result.get("msg")
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"修改关系异常: {str(e)}"})


# --- 9. 删除节点 ---
@app.post("/api/kg/node/delete")
def delete_node(req):
    try:
        body = parse_request_body(req)
        node_id = body.get("id")
        if not node_id:
            return create_response(200, {"code": 400, "msg": "删除失败: 未指定节点系统ID"})

        result = operation_service.delete_node(node_id)
        return create_response(200, {
            "code": 200 if result.get("success") else 400,
            "msg": result.get("msg")
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"删除节点异常: {str(e)}"})


# --- 10. 删除关系 ---
@app.post("/api/kg/rel/delete")
def delete_rel(req):
    try:
        body = parse_request_body(req)
        rel_id = body.get("id")
        if not rel_id:
            return create_response(200, {"code": 400, "msg": "删除失败: 未指定关系系统ID"})

        result = operation_service.delete_relationship(rel_id)
        return create_response(200, {
            "code": 200 if result.get("success") else 400,
            "msg": result.get("msg")
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"删除关系异常: {str(e)}"})


# --- 11. 获取图谱全局统计数据 ---
@app.get("/api/kg/stats")
def get_kg_stats(req):
    try:
        result = operation_service.get_kg_stats()
        if result and result.get("success"):
            return create_response(200, {"code": 200, "data": result.get("data"), "msg": "success"})
        else:
            msg = result.get("msg") if result else "未能获取统计数据"
            return create_response(200, {"code": 400, "msg": msg})
    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"统计数据异常: {str(e)}"})


# --- 12. 数据导出接口 ---

@app.get("/api/kg/export/nodes")
def export_nodes(req):
    """
    节点导出接口：全量导出满足筛选条件的节点
    """
    try:
        # 1. 提取筛选参数
        name_raw = get_query_param(req, "name", "")
        label_raw = get_query_param(req, "label", "")

        # 2. 参数清洗
        name = name_raw.strip() if name_raw and str(name_raw).lower() not in ["null", "undefined"] else None
        label = label_raw.strip() if label_raw and label_raw not in ["全部", "", "null", "undefined"] else None

        # 3. 调用 Service：移除 limit 参数，执行全量导出
        result = operation_service.export_nodes_to_json(label=label, name=name)

        if result.get("success"):
            return create_response(200, {
                "code": 200,
                "data": result.get("data"),
                "total": result.get("count", 0),
                "msg": "success"
            })
        else:
            return create_response(200, {"code": 500, "msg": result.get("msg", "获取导出数据失败")})

    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"导出节点接口异常: {str(e)}"})


@app.get("/api/kg/export/relationships")
def export_relationships(req):
    """
    关系导出接口：全量导出满足筛选条件的关系
    """
    try:
        # 1. 提取筛选参数
        source_raw = get_query_param(req, "source", "")
        target_raw = get_query_param(req, "target", "")
        type_raw = get_query_param(req, "type", "")

        # 2. 参数清洗
        source = source_raw.strip() if source_raw and str(source_raw).lower() not in ["null", "undefined"] else None
        target = target_raw.strip() if target_raw and str(target_raw).lower() not in ["null", "undefined"] else None
        rel_type = type_raw.strip() if type_raw and type_raw not in ["全部", "", "null", "undefined"] else None

        # 3. 执行导出查询：移除 limit 参数，执行全量导出
        result = operation_service.export_relationships_to_json(
            source=source,
            target=target,
            rel_type=rel_type
        )

        if result.get("success"):
            return create_response(200, {
                "code": 200,
                "data": result.get("data"),
                "total": result.get("count", 0),
                "msg": "success"
            })
        else:
            return create_response(200, {
                "code": 500,
                "msg": result.get("msg", "获取导出关系失败")
            })

    except Exception as e:
        traceback.print_exc()
        return create_response(200, {
            "code": 500,
            "msg": f"导出关系接口异常: {str(e)}"
        })


# --- 13. 批量导入核心接口 (预检 & 执行) ---

@app.post("/api/kg/import/nodes/precheck")
def import_nodes_precheck(req):
    """
    预检接口：接收前端上传的 nodes 数组，进行冲突和有效性扫描。
    """
    try:
        body = parse_request_body(req)
        nodes = body.get("nodes", [])
        if not nodes: return create_response(200, {"code": 400, "msg": "数据为空"})

        result = operation_service.precheck_nodes_batch(nodes)
        return create_response(200, {
            "code": 200,
            "data": {
                "conflicts": result.get("conflicts", []),
                "invalid": result.get("invalid", []),  # 这里会包含因缺少 nodeId 而被过滤的数据
                "summary": result.get("summary", {})
            },
            "msg": "预检完成"
        })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"预检异常: {str(e)}"})


@app.post("/api/kg/import/nodes/execute")
def import_nodes_execute(req):
    """
    执行导入接口：支持模式 mode (strict/skip/update)。
    """
    try:
        body = parse_request_body(req)
        nodes = body.get("nodes", [])
        mode = body.get("mode", "skip")

        if not nodes: return create_response(200, {"code": 400, "msg": "批次数据为空"})

        result = operation_service.execute_node_import_batch(nodes, mode=mode)

        if result.get("success"):
            return create_response(200, {"code": 200, "msg": result.get("msg")})
        else:
            # 严格模式下如果因冲突失败，返回详情
            return create_response(200, {
                "code": 500,
                "msg": result.get("msg"),
                "data": {"conflicts": result.get("conflicts", [])}
            })
    except Exception as e:
        return create_response(200, {"code": 500, "msg": f"执行异常: {str(e)}"})

# --- 关系导入核心修正 ---

@app.post("/api/kg/import/relationships/precheck")
def import_rels_precheck(req):
    """
    修正说明：适配 Service 层返回的 summary 结构，确保前端准确识别冲突数
    """
    try:
        body = parse_request_body(req)
        # 兼容 relationships 和 rels 两种写法
        rels = body.get("relationships") or body.get("rels") or []
        if not rels:
            return create_response(200, {"code": 400, "msg": "预检数据为空"})

        result = operation_service.precheck_rels_batch(rels)
        return create_response(200, {
            "code": 200,
            "data": {
                "conflicts": result.get("conflicts", []),
                "invalid": result.get("invalid", []),
                "summary": result.get("summary", {}) # 包含准确的 conflict 计数
            },
            "msg": "预检成功"
        })
    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"关系预检异常: {str(e)}"})


@app.post("/api/kg/import/relationships/execute")
def import_rels_execute(req):
    """
    修正说明：将 Service 层生成的包含 elementId 的标准 Graph 数据透传回前端
    """
    try:
        body = parse_request_body(req)
        rels = body.get("relationships") or body.get("rels") or []
        mode = body.get("mode", "skip")

        if not rels:
            return create_response(200, {"code": 400, "msg": "执行数据为空"})

        result = operation_service.execute_rel_import_batch(rels, mode=mode)

        if result.get("success"):
            return create_response(200, {
                "code": 200,
                "msg": result.get("msg"),
                "data": result.get("data"), # 核心：返回标准嵌套结构的数组
                "count": result.get("count", 0)
            })
        else:
            return create_response(200, {"code": 500, "msg": result.get("msg")})
    except Exception as e:
        traceback.print_exc()
        return create_response(200, {"code": 500, "msg": f"关系导入执行异常: {str(e)}"})