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()


# --- 核心工具函数 ---

def create_response(status_code, data_dict):
    """
    统一响应格式封装，强制使用 UTF-8 防止中文乱码。
    """
    return Response(
        status_code=status_code,
        description=jsonify(data_dict),
        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)}"})