# 文件路径: app/api/v1/inbound/base.py

from flask import Blueprint, request, jsonify, send_file, g
from app.extensions import db
from app.services.inbound.base_service import MaterialBaseService
from app.utils.decorators import login_required, permission_required, audit_log
from app.models.base import MaterialBase, MaterialWarningSetting
import traceback
import datetime
import json

inbound_base_bp = Blueprint('stock_base', __name__)


# ==============================================================================
# 辅助函数：获取当前用户的完整权限列表（基于角色查询）
# ==============================================================================
def get_current_user_permissions():
    """
    返回当前用户拥有的所有权限码列表（包括菜单和元素）
    此函数根据角色查询数据库得到权限。
    """
    from flask_jwt_extended import get_jwt
    from app.services.auth_service import AuthService
    claims = get_jwt()
    user_role = claims.get('role')
    if not user_role:
        return []
    # 超级管理员返回所有字段权限 (忽略大小写)
    if user_role.upper() == 'SUPER_ADMIN':
        # 返回通配符权限（供列表脱敏使用）以及所有具体权限（供导出脱敏使用）
        return [
            'material_list:*',
            'material_list:id',
            'material_list:companyName',
            'material_list:name',
            'material_list:commonName',
            'material_list:category',
            'material_list:type',
            'material_list:spec',
            'material_list:unit',
            'material_list:inventoryCount',
            'material_list:availableCount',
            'material_list:files',
            'material_list:isEnabled',
            'material_list:operation'
        ]
    perm_dict = AuthService.get_user_permissions(user_role)
    # 合并菜单和元素权限
    perms = perm_dict.get('menus', []) + perm_dict.get('elements', [])
    return perms


def filter_item_by_permissions(item_dict, user_permissions):
    """
    根据用户权限过滤 item 字典，无权限的字段值置为 None
    """
    # 如果用户拥有通配符权限，则不过滤
    if 'material_list:*' in user_permissions:
        return item_dict
    # 字段名到权限码的映射（与前端 permissionMap 保持一致）
    field_to_perm = {
        'id': 'material_list:id',
        'companyName': 'material_list:companyName',
        'name': 'material_list:name',
        'commonName': 'material_list:commonName',
        'category': 'material_list:category',
        'type': 'material_list:type',
        'spec': 'material_list:spec',
        'unit': 'material_list:unit',
        'inventoryCount': 'material_list:inventoryCount',
        'availableCount': 'material_list:availableCount',
        'generalManual': 'material_list:files',
        'generalImage': 'material_list:files',
        'isEnabled': 'material_list:isEnabled'
    }
    for field, perm_code in field_to_perm.items():
        if field in item_dict and perm_code not in user_permissions:
            item_dict[field] = None
    return item_dict


# ==============================================================================
# 1. 搜索接口 (GET /api/v1/inbound/base/search)
# ==============================================================================
@inbound_base_bp.route('/search', methods=['GET'])
@permission_required('material_list')
def search_base():
    try:
        keyword = request.args.get('keyword', '')
        data = MaterialBaseService.search_material(keyword)
        # 字段级脱敏
        user_permissions = get_current_user_permissions()
        filtered_data = [filter_item_by_permissions(item, user_permissions) for item in data]
        return jsonify({"code": 200, "msg": "success", "data": filtered_data})
    except Exception as e:
        traceback.print_exc()
        return jsonify({"code": 500, "msg": str(e)}), 500


# ==============================================================================
# 2. 列表接口 (GET /api/v1/inbound/base/list)
# ==============================================================================
@inbound_base_bp.route('/list', methods=['GET'])
@permission_required('material_list')
def get_list():
    try:
        page = request.args.get('pageNum', 1, type=int)
        limit = request.args.get('pageSize', 10, type=int)

        # 解析高级筛选条件
        advanced_filters_raw = request.args.get('advancedFilters', '[]')
        try:
            advanced_filters_list = json.loads(advanced_filters_raw)
        except:
            advanced_filters_list = []

        # 构造筛选条件
        filters = {
            'keyword': request.args.get('keyword', ''),
            'company': request.args.get('company', ''),
            'category': request.args.get('category', ''),
            'type': request.args.get('type', ''),
            'isEnabled': request.args.get('isEnabled', None),
            'orderByColumn': request.args.get('orderByColumn', ''),
            'isAsc': request.args.get('isAsc', None),
            'advancedFilters': advanced_filters_list,
            'enableWarningSort': request.args.get('enableWarningSort', 'false').lower() == 'true',
            'has_stock': request.args.get('has_stock', ''),
            'searchField': request.args.get('searchField', 'all')
        }

        user_permissions = get_current_user_permissions()
        result = MaterialBaseService.get_list(page, limit, filters, user_permissions)
        # 字段级脱敏
        user_permissions = get_current_user_permissions()
        if result.get('items'):
            result['items'] = [filter_item_by_permissions(item, user_permissions) for item in result['items']]
        return jsonify({"code": 200, "msg": "success", "data": result})
    except Exception as e:
        traceback.print_exc()
        return jsonify({"code": 500, "msg": str(e)}), 500


# ==============================================================================
# 2.1 选项接口 (GET /api/v1/inbound/base/options)
# ==============================================================================
@inbound_base_bp.route('/options', methods=['GET'])
@permission_required('material_list')
def get_options():
    try:
        data = MaterialBaseService.get_distinct_options()
        return jsonify({"code": 200, "msg": "success", "data": data})
    except Exception as e:
        traceback.print_exc()
        return jsonify({"code": 500, "msg": str(e)}), 500


# ==============================================================================
# 2.2 导出接口 (GET /api/v1/inbound/base/export)
# ==============================================================================
@inbound_base_bp.route('/export', methods=['GET'])
@permission_required('material_list')
def export_data():
    try:
        # 获取筛选条件
        filters = {
            'keyword': request.args.get('keyword', ''),
            'company': request.args.get('company', ''),
            'category': request.args.get('category', ''),
            'type': request.args.get('type', ''),
            'isEnabled': request.args.get('isEnabled', None)
        }

        # 获取当前用户权限
        user_permissions = get_current_user_permissions()

        # 生成 Excel 文件流（传入用户权限进行脱敏）
        file_stream = MaterialBaseService.export_excel(filters, user_permissions)

        # 生成文件名：库存统计+年月日+时分秒 (北京时间 UTC+8)
        # 简单处理：UTC时间 + 8小时
        beijing_time = datetime.datetime.utcnow() + datetime.timedelta(hours=8)
        filename = f"库存统计_{beijing_time.strftime('%Y%m%d_%H%M%S')}.xlsx"

        # 发送文件
        # 注意：download_name 仅在较新 Flask 版本有效，旧版本可能需要手动 header，
        # 但通常浏览器下载名由前端 Blob 处理或 Content-Disposition 决定。
        return send_file(
            file_stream,
            mimetype='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
            as_attachment=True,
            download_name=filename
        )
    except Exception as e:
        traceback.print_exc()
        return jsonify({"code": 500, "msg": f"导出失败: {str(e)}"}), 500


# ==============================================================================
# 3. 新增接口 (POST /api/v1/inbound/base/)
# ==============================================================================
@inbound_base_bp.route('/', methods=['POST'])
@permission_required('material_list:operation')
@audit_log(
    module='基础信息管理',
    action='新增',
    get_target_name_fn=lambda: request.get_json().get('name') if request.get_json() else None
)
def create():
    try:
        data = request.get_json()
        if not data:
            return jsonify({"code": 400, "msg": "No data provided"}), 400

        # 获取当前用户权限
        user_permissions = get_current_user_permissions()
        # 字段到权限码的映射（与 filter_item_by_permissions 一致）
        field_to_perm = {
            'id': 'material_list:id',
            'companyName': 'material_list:companyName',
            'name': 'material_list:name',
            'commonName': 'material_list:commonName',
            'category': 'material_list:category',
            'type': 'material_list:type',
            'spec': 'material_list:spec',
            'unit': 'material_list:unit',
            'inventoryCount': 'material_list:inventoryCount',
            'availableCount': 'material_list:availableCount',
            'generalManual': 'material_list:files',
            'generalImage': 'material_list:files',
            'isEnabled': 'material_list:isEnabled'
        }
        # 过滤用户没有权限的字段
        filtered_data = {}
        # 如果拥有通配符权限，则不过滤
        if 'material_list:*' in user_permissions:
            filtered_data = data
        else:
            for key, value in data.items():
                if key in field_to_perm:
                    perm_code = field_to_perm[key]
                    if perm_code in user_permissions:
                        filtered_data[key] = value
                    # 没有权限则跳过，不包含在 filtered_data 中
                else:
                    # 不在映射中的字段，默认允许（例如 visibilityLevel）
                    filtered_data[key] = value

        MaterialBaseService.create_material(filtered_data)
        return jsonify({"code": 200, "msg": "新增成功"})
    except ValueError as e:
        # 捕获业务逻辑验证错误 (如名称为空)
        return jsonify({"code": 400, "msg": str(e)}), 400
    except Exception as e:
        # 捕获系统错误
        traceback.print_exc()
        return jsonify({"code": 500, "msg": f"系统错误: {str(e)}"}), 500


# ==============================================================================
# 4. 修改接口 (PUT /api/v1/inbound/base/<id>)
# ==============================================================================
@inbound_base_bp.route('/<int:id>', methods=['PUT'])
@permission_required('material_list:operation')
@audit_log(
    module='基础信息管理',
    action='修改',
    get_target_id_fn=lambda: request.view_args.get('id'),
    get_target_name_fn=lambda: request.get_json().get('name') if request.get_json() else None
)
def update(id):
    try:
        data = request.get_json()
        # 获取当前用户权限
        user_permissions = get_current_user_permissions()
        # 字段到权限码的映射（与 filter_item_by_permissions 一致）
        field_to_perm = {
            'id': 'material_list:id',
            'companyName': 'material_list:companyName',
            'name': 'material_list:name',
            'commonName': 'material_list:commonName',
            'category': 'material_list:category',
            'type': 'material_list:type',
            'spec': 'material_list:spec',
            'unit': 'material_list:unit',
            'inventoryCount': 'material_list:inventoryCount',
            'availableCount': 'material_list:availableCount',
            'generalManual': 'material_list:files',
            'generalImage': 'material_list:files',
            'isEnabled': 'material_list:isEnabled'
        }
        # 过滤用户没有权限的字段
        filtered_data = {}
        # 如果拥有通配符权限，则不过滤
        if 'material_list:*' in user_permissions:
            filtered_data = data
        else:
            for key, value in data.items():
                if key in field_to_perm:
                    perm_code = field_to_perm[key]
                    if perm_code in user_permissions:
                        filtered_data[key] = value
                    # 没有权限则跳过，不包含在 filtered_data 中
                else:
                    # 不在映射中的字段，默认允许（例如 visibilityLevel）
                    filtered_data[key] = value
        # 使用过滤后的数据调用服务
        MaterialBaseService.update_material(id, filtered_data)
        return jsonify({"code": 200, "msg": "修改成功"})
    except Exception as e:
        traceback.print_exc()
        return jsonify({"code": 500, "msg": str(e)}), 500


# ==============================================================================
# 5. 删除接口 (DELETE /api/v1/inbound/base/<id>)
# ==============================================================================
@inbound_base_bp.route('/<int:id>', methods=['DELETE'])
@permission_required('material_list:operation')
@audit_log(
    module='基础信息管理',
    action='删除',
    get_target_id_fn=lambda: request.view_args.get('id')
)
def delete(id):
    try:
        MaterialBaseService.delete_material(id)
        return jsonify({"code": 200, "msg": "删除成功"})
    except Exception as e:
        traceback.print_exc()
        return jsonify({"code": 500, "msg": str(e)}), 500


# ==============================================================================
# 2.5 批量设置预警 API (POST /api/v1/inbound/base/warning/batch-set)
# ==============================================================================
@inbound_base_bp.route('/warning/batch-set', methods=['POST'])
@permission_required('material_list:edit_warning')
def batch_set_warning():
    """
    批量设置物料预警配置
    请求体格式: [
        {"baseId": 1, "isEnabled": true, "yellowThreshold": 10, "redThreshold": 5},
        {"baseId": 2, "isEnabled": false}
    ]
    """
    try:
        data = request.get_json()
        if not isinstance(data, list):
            return jsonify({"code": 400, "msg": "请求体必须为数组"})

        updated_count = 0
        created_count = 0

        for item in data:
            base_id = item.get('baseId')
            if not base_id:
                continue

            # 查找物料是否存在
            material = MaterialBase.query.get(base_id)
            if not material:
                current_app.logger.warning(f"物料ID {base_id} 不存在，跳过")
                continue

            # 查找现有预警设置
            warning = MaterialWarningSetting.query.filter_by(base_id=base_id).first()

            if warning:
                # 更新现有记录
                if 'isEnabled' in item:
                    warning.is_enabled = bool(item['isEnabled'])
                # 安全转换阈值，None 默认转为 0
                yellow_val = item.get('yellowThreshold')
                red_val = item.get('redThreshold')
                warning.yellow_threshold = float(yellow_val) if yellow_val is not None else 0
                warning.red_threshold = float(red_val) if red_val is not None else 0
                updated_count += 1
            else:
                # 创建新记录
                yellow_val = item.get('yellowThreshold')
                red_val = item.get('redThreshold')
                warning = MaterialWarningSetting(
                    base_id=base_id,
                    is_enabled=item.get('isEnabled', False),
                    yellow_threshold=float(yellow_val) if yellow_val is not None else 0,
                    red_threshold=float(red_val) if red_val is not None else 0
                )
                db.session.add(warning)
                created_count += 1

        db.session.commit()
        return jsonify({
            "code": 200,
            "msg": "批量设置成功",
            "data": {
                "created": created_count,
                "updated": updated_count
            }
        })

    except Exception as e:
        db.session.rollback()
        current_app.logger.error(f"批量设置预警失败: {str(e)}")
        return jsonify({"code": 500, "msg": f"批量设置预警失败: {str(e)}"}), 500