import json
import requests
from django.conf import settings
from django.db.models import Q
from openai import OpenAI

from .models import City, Attraction, TravelPlan, DayPlan, DayPlanAttraction
from django.core.cache import cache
import logging
logger = logging.getLogger(__name__)
import json
from django.conf import settings
from openai import OpenAI
from .models import City, Attraction
from django.core.cache import cache
from datetime import datetime, timedelta
import random


# class MoonshotAIService:
#     @staticmethod
#     def generate_travel_plan(preference, is_regeneration=False, previous_plan=None):
#         """
#         增强版红色旅游路线规划AI服务
#         """
#         # 处理输入参数
#         if isinstance(preference, dict):
#             city_ids = preference.get('city_ids', [])
#             cities = City.objects.filter(id__in=city_ids)
#             days = preference.get('days', 3)
#             interests = preference.get('interests', [])
#             transport = preference.get('transport', 'public')
#             custom_requirements = preference.get('custom_requirements', '')
#         else:
#             cities = preference.cities.all()
#             days = preference.days
#             interests = preference.interests
#             transport = preference.get_transport_display()
#             custom_requirements = preference.custom_requirements or '无'
#
#         # 获取相关景点（优先红色旅游景点）
#         attractions = Attraction.objects.filter(
#             city__in=cities,
#             tags__contains="红色旅游"
#         ).select_related('city')
#
#         # 如果没有足够红色景点，补充其他景点
#         if len(attractions) < days * 3:
#             additional_attractions = Attraction.objects.filter(
#                 city__in=cities
#             ).exclude(tags__contains="红色旅游")[:10]
#             attractions = list(attractions) + list(additional_attractions)
#
#         # 构建提示词
#         prompt = MoonshotAIService._build_enhanced_prompt(
#             cities, days, interests, transport,
#             custom_requirements, attractions,
#             is_regeneration, previous_plan
#         )
#
#         # 调用Moonshot AI API
#         client = OpenAI(
#             api_key=settings.MOONSHOT_API_KEY,
#             base_url="https://api.moonshot.cn/v1"
#         )
#
#         try:
#             response = client.chat.completions.create(
#                 model="moonshot-v1-8k",
#                 messages=[
#                     {
#                         "role": "system",
#                         "content": "你是一个红色旅游规划专家，熟悉山东省所有红色景点。请按照指定格式输出，包含详细路线、时间安排和景点介绍。"
#                     },
#                     {"role": "user", "content": prompt}
#                 ],
#                 response_format={"type": "json_object"},
#                 temperature=0.7 if is_regeneration else 0.5
#             )
#
#             # 解析并处理返回数据
#             plan_data = json.loads(response.choices[0].message.content.strip())
#             return MoonshotAIService._process_ai_response(plan_data, attractions)
#
#         except Exception as e:
#             print(f"AI服务异常: {str(e)}")
#             return {
#                 "error": "行程生成失败",
#                 "details": str(e)
#             }
#
#     @staticmethod
#     def _build_enhanced_prompt(cities, days, interests, transport, requirements, attractions, is_regeneration,
#                                previous_plan):
#         """构建增强版红色旅游提示词"""
#         city_names = [city.name for city in cities]
#         attraction_list = [
#             f"{att.id}:{att.name}[标签:{','.join(att.tags)}][城市:{att.city.name}][描述:{att.short_desc}]"
#             for att in attractions
#         ]
#
#         base_prompt = f"""
#         你是一个专业的红色旅游规划AI助手，请根据以下信息为游客规划山东省红色旅游行程：
#
#         基本要求：
#         - 城市：{city_names}
#         - 天数：{days}天
#         - 兴趣偏好：{interests or '无特别偏好'}
#         - 交通方式：{transport}
#         - 特殊要求：{requirements or '无'}
#
#         可选景点信息（ID:名称[标签][城市][简短描述]）：
#         {attraction_list}
#
#         请设计一个富有教育意义的红色旅游路线，要求：
#         1. 每天安排3-4个景点，包含至少2个红色景点
#         2. 合理安排景点间的交通时间和午餐时间
#         3. 每个景点提供详细的参观建议和背景介绍
#         4. 路线设计要连贯，避免来回奔波
#         5. 包含早中晚餐的推荐地点（尽量选择红色教育基地附近的餐馆）
#         """
#
#         if is_regeneration:
#             base_prompt += f"""
#             这是之前的行程计划，请重新设计不同的路线：
#             {json.dumps(previous_plan, ensure_ascii=False, indent=2)}
#             """
#
#         base_prompt += f"""
#         请返回JSON格式的行程计划，结构如下：
#         {{
#             "title": "行程标题（突出红色主题）",
#             "description": "行程整体描述（200字左右）",
#             "suitable_for": "适合人群（如'亲子家庭'、'学生团体'等）",
#             "days": [
#                 {{
#                     "day": 1,
#                     "theme": "当日主题（如'革命精神传承之旅'）",
#                     "description": "当日详细描述",
#                     "transport": "交通安排建议",
#                     "morning": {{
#                         "start_time": "08:00",
#                         "attraction": 景点ID,
#                         "visit_time": "建议参观时间（如'1.5小时'）",
#                         "description": "景点详细介绍（300字左右）",
#                         "recommendation": "参观建议（如'建议先参观纪念馆主展厅'）"
#                     }},
#                     "lunch": {{
#                         "time": "12:00",
#                         "recommendation": "午餐推荐地点和特色菜",
#                         "description": "餐馆简介（100字左右）"
#                     }},
#                     "afternoon": [
#                         {{
#                             "start_time": "13:30",
#                             "attraction": 景点ID,
#                             "visit_time": "建议参观时间",
#                             "description": "景点详细介绍",
#                             "recommendation": "参观建议"
#                         }},
#                         ...
#                     ],
#                     "dinner": {{
#                         "time": "18:00",
#                         "recommendation": "晚餐推荐",
#                         "description": "餐馆简介"
#                     }},
#                     "evening_activity": {{
#                         "description": "晚间活动建议（如'观看红色主题演出'）",
#                         "recommendation": "活动详情"
#                     }}
#                 }},
#                 ...
#             ],
#             "travel_tips": [
#                 "穿着建议：...",
#                 "注意事项：...",
#                 "红色教育重点：..."
#             ]
#         }}
#         """
#         return base_prompt
#
#     @staticmethod
#     def _process_ai_response(plan_data, attractions):
#         """处理AI返回数据，补充完整景点信息"""
#         attraction_map = {att.id: att for att in attractions}
#
#         for day in plan_data.get('days', []):
#             # 处理上午景点
#             if 'morning' in day and day['morning']['attraction'] in attraction_map:
#                 att = attraction_map[day['morning']['attraction']]
#                 day['morning'].update({
#                     'attraction_data': {
#                         'name': att.name,
#                         'image': att.image.url if att.image else '',
#                         'address': att.address,
#                         'open_hours': att.open_hours,
#                         'ticket_price': str(att.ticket_price)
#                     }
#                 })
#
#             # 处理下午景点
#             if 'afternoon' in day:
#                 for item in day['afternoon']:
#                     if item['attraction'] in attraction_map:
#                         att = attraction_map[item['attraction']]
#                         item.update({
#                             'attraction_data': {
#                                 'name': att.name,
#                                 'image': att.image.url if att.image else '',
#                                 'address': att.address,
#                                 'open_hours': att.open_hours,
#                                 'ticket_price': str(att.ticket_price)
#                             }
#                         })
#
#         return plan_data

# services.py
class MoonshotAIService:
    RED_TOURISM_TAGS = ['红色旅游', '革命', '烈士', '纪念馆', '党史']

    @staticmethod
    def generate_travel_plan(preference):
        """
        红色旅游专用生成方法
        """
        try:
            # 1. 获取城市和景点
            cities = City.objects.filter(id__in=preference['city_ids'])
            if not cities.exists():
                return {'error': '未找到指定城市'}

            # 2. 优先获取红色景点
            attractions = Attraction.objects.filter(
                city__in=cities,
                tags__overlap=MoonshotAIService.RED_TOURISM_TAGS
            )

            # 如果红色景点不足，补充其他景点
            if len(attractions) < preference['days'] * 2:
                extra_attractions = Attraction.objects.filter(
                    city__in=cities
                ).exclude(tags__overlap=MoonshotAIService.RED_TOURISM_TAGS)[:10]
                attractions = list(attractions) + list(extra_attractions)

            # 3. 构建AI提示
            prompt = MoonshotAIService._build_red_tourism_prompt(
                cities,
                preference['days'],
                preference['interests'],
                preference['transport'],
                preference.get('custom_requirements', ''),
                attractions
            )

            # 4. 调用AI接口
            client = OpenAI(
                api_key=settings.MOONSHOT_API_KEY,
                base_url="https://api.moonshot.cn/v1"
            )

            response = client.chat.completions.create(
                model="moonshot-v1-8k",
                messages=[
                    {
                        "role": "system",
                        "content": "你是红色旅游专家，专门规划革命教育路线。必须包含党史学习内容。"
                    },
                    {"role": "user", "content": prompt}
                ],
                response_format={"type": "json_object"},
                temperature=0.5
            )

            # 5. 解析响应
            plan_data = json.loads(response.choices[0].message.content)
            return MoonshotAIService._process_red_tourism_response(plan_data, attractions)

        except Exception as e:
            return {'error': str(e)}

    @staticmethod
    def _build_red_tourism_prompt(cities, days, interests, transport, requirements, attractions):
        """构建红色旅游专用提示词"""
        city_names = [city.name for city in cities]
        attraction_list = "\n".join([
            f"{att.id}:{att.name}[标签:{','.join(att.tags)}][城市:{att.city.name}]"
            for att in attractions
        ])

        return f"""
        请规划一个{days}天的红色旅游路线，要求：
        - 城市：{city_names}
        - 必须包含至少{max(2, days)}个红色教育基地
        - 交通方式：{transport}
        - 特殊要求：{requirements or '无'}

        可选景点：
        {attraction_list}

        返回JSON格式，包含：
        - title: 行程标题(必须含"红色"或"革命")
        - description: 行程描述(突出教育意义)
        - days: 每日安排(必须包含educational_points教育要点)
        - 每个景点标注is_red_tourism是否为红色景点
        """

    @staticmethod
    def _process_red_tourism_response(plan_data, attractions):
        """处理AI返回的红色旅游数据"""
        attraction_map = {att.id: att for att in attractions}

        for day in plan_data.get('days', []):
            for attraction in day.get('attractions', []):
                att_id = attraction.get('id')
                if att_id in attraction_map:
                    att = attraction_map[att_id]
                    attraction.update({
                        'image': att.image.url if att.image else '',
                        'address': att.address,
                        'open_hours': att.open_hours,
                        'is_red_tourism': any(tag in att.tags for tag in MoonshotAIService.RED_TOURISM_TAGS)
                    })

        return plan_data

    @staticmethod
    def regenerate_travel_plan(params):
        """
        增强版重新生成方法，确保返回完整景点数据
        """
        try:
            # 1. 参数验证和转换
            city_ids = params.get('city_ids', [])
            if isinstance(city_ids, int):  # 处理单个城市ID的情况
                city_ids = [city_ids]

            cities = City.objects.filter(id__in=city_ids)
            if not cities.exists():
                return {'error': '未找到指定城市'}

            days = int(params.get('days', 3))

            # 2. 获取所有相关景点（原行程景点 + 新红色景点）
            previous_attractions = []
            for day in params.get('previous_plan', {}).get('days', []):
                for attr in day.get('attractions', []):
                    if attr.get('id'):
                        previous_attractions.append(attr['id'])

            # 查询数据库获取完整景点对象
            attractions = Attraction.objects.filter(
                Q(id__in=previous_attractions) |
                Q(city__in=cities, tags__overlap=MoonshotAIService.RED_TOURISM_TAGS)
            ).distinct()

            # 3. 构建更明确的提示词
            prompt = f"""
            请基于原行程重新规划{days}天红色旅游路线，要求：

            **必须包含以下元素**：
            1. 至少{max(2, days)}个红色教育基地
            2. 保留原行程中评分高的景点
            3. 每日主题明确（如"革命精神传承"）

            **城市范围**：{[city.name for city in cities]}

            **可选景点**：
            {[f"{a.id}:{a.name}[红色:{any(tag in a.tags for tag in MoonshotAIService.RED_TOURISM_TAGS)}]" for a in attractions]}

            **返回格式示例**：
            {{
                "title": "新行程标题",
                "days": [
                    {{
                        "day": 1,
                        "attractions": [
                            {{
                                "id": 景点ID,
                                "name": "景点名称",
                                "is_red_tourism": true/false,
                                "educational_value": "高/中/低"
                            }}
                        ]
                    }}
                ]
            }}
            """

            # 4. 调用AI接口（示例代码，实际需要替换为您的AI调用）
            client = OpenAI(api_key=settings.MOONSHOT_API_KEY, base_url="https://api.moonshot.cn/v1")
            response = client.chat.completions.create(
                model="moonshot-v1-8k",
                messages=[
                    {"role": "system", "content": "你是红色旅游专家，严格按照要求生成行程"},
                    {"role": "user", "content": prompt}
                ],
                response_format={"type": "json_object"},
                temperature=0.6
            )

            # 5. 处理响应数据
            plan_data = json.loads(response.choices[0].message.content)

            # 补充景点完整信息
            attraction_map = {a.id: a for a in attractions}
            for day in plan_data.get('days', []):
                for attr in day.get('attractions', []):
                    if attr['id'] in attraction_map:
                        a = attraction_map[attr['id']]
                        attr.update({
                            'image': a.image.url if a.image else '',
                            'address': a.address,
                            'open_hours': a.open_hours,
                            'is_red_tourism': any(tag in a.tags for tag in MoonshotAIService.RED_TOURISM_TAGS)
                        })

            return plan_data

        except Exception as e:
            logger.error(f"重新生成失败: {str(e)}", exc_info=True)
            return {'error': str(e)}
# class MoonshotAIService:
#     @staticmethod
#     def generate_travel_plan(preference, is_regeneration=False, previous_plan=None):
#         """
#         调用Moonshot AI API生成旅行计划
#         :param preference: 偏好设置(字典或Django模型对象)
#         :param is_regeneration: 是否为重新生成请求
#         :param previous_plan: 之前的行程计划(仅重新生成时使用)
#         :return: 生成的行程计划字典
#         """
#         # 处理输入参数（支持字典或Django模型对象）
#         if isinstance(preference, dict):
#             city_ids = preference.get('city_ids', [])
#             cities = City.objects.filter(id__in=city_ids)
#             days = preference.get('days', 3)
#             interests = preference.get('interests', [])
#             transport = preference.get('transport', 'public')
#             custom_requirements = preference.get('custom_requirements', '')
#         else:
#             cities = preference.cities.all()
#             days = preference.days
#             interests = preference.interests
#             transport = preference.get_transport_display()
#             custom_requirements = preference.custom_requirements or '无'
#
#         # 获取相关景点
#         attractions = Attraction.objects.filter(city__in=cities)
#
#         # 构建不同的提示词基于是否是重新生成
#         if is_regeneration:
#             prompt = MoonshotAIService._build_regeneration_prompt(
#                 cities, days, interests, transport,
#                 custom_requirements, attractions, previous_plan
#             )
#         else:
#             prompt = MoonshotAIService._build_initial_prompt(
#                 cities, days, interests, transport,
#                 custom_requirements, attractions
#             )
#
#         # 调用Moonshot AI API
#         client = OpenAI(
#             api_key=settings.MOONSHOT_API_KEY,
#             base_url="https://api.moonshot.cn/v1"
#         )
#
#         try:
#             response = client.chat.completions.create(
#                 model="moonshot-v1-8k",
#                 messages=[
#                     {
#                         "role": "system",
#                         "content": "你是一个旅行规划专家，严格按照用户指定的JSON格式输出，不添加额外解释。"
#                     },
#                     {"role": "user", "content": prompt}
#                 ],
#                 response_format={"type": "json_object"},
#                 temperature=0.7 if is_regeneration else 0.5  # 重新生成时增加一点随机性
#             )
#
#             # 解析并返回JSON
#             return json.loads(response.choices[0].message.content.strip())
#
#         except json.JSONDecodeError:
#             print("API返回的不是有效JSON，尝试修复...")
#             raw_content = response.choices[0].message.content
#             start_idx = raw_content.find("{")
#             end_idx = raw_content.rfind("}") + 1
#             return json.loads(raw_content[start_idx:end_idx])
#
#         except Exception as e:
#             print(f"Moonshot AI API调用异常: {str(e)}")
#             return {
#                 "error": "行程生成失败",
#                 "details": str(e)
#             }
#
#     @staticmethod
#     def _build_initial_prompt(cities, days, interests, transport, custom_requirements, attractions):
#         """构建初始行程提示词"""
#         return f"""
#         你是一个专业的旅行规划AI助手，请根据以下信息规划行程：
#         - 城市：{[city.name for city in cities]}
#         - 天数：{days}天
#         - 兴趣：{', '.join(interests) if interests else '无特别偏好'}
#         - 交通方式：{transport}
#         - 特殊要求：{custom_requirements if custom_requirements else '无'}
#
#         可选景点（格式：名称[标签]）：
#         {[f"{att.name}[{', '.join(att.tags)}]" for att in attractions]}
#
#         请返回JSON格式的行程计划，结构如下：
#         {{
#             "title": "行程标题",
#             "description": "行程描述",
#             "suitable_for": "适合人群描述",
#             "days": [
#                 {{
#                     "day": 1,
#                     "theme": "当日主题",
#                     "description": "当日描述",
#                     "transport": "交通方式描述",
#                     "attractions": [
#                         {{
#                             "id": 景点ID,
#                             "name": "景点名称",
#                             "visit_time": "建议参观时间",
#                             "notes": "备注信息"
#                         }}
#                     ]
#                 }}
#             ]
#         }}
#         """
#
#     @staticmethod
#     def _build_regeneration_prompt(cities, days, interests, transport, custom_requirements, attractions, previous_plan):
#         """构建重新生成行程提示词"""
#         previous_plan_str = json.dumps(previous_plan, ensure_ascii=False, indent=2) if previous_plan else "无"
#
#         return f"""
#         你是一个专业的旅行规划AI助手，请基于相同的偏好但不同的安排重新规划行程：
#
#         原行程计划：
#         {previous_plan_str}
#
#         偏好设置：
#         - 城市：{[city.name for city in cities]}
#         - 天数：{days}天
#         - 兴趣：{', '.join(interests) if interests else '无特别偏好'}
#         - 交通方式：{transport}
#         - 特殊要求：{custom_requirements if custom_requirements else '无'}
#
#         可选景点（格式：名称[标签]）：
#         {[f"{att.name}[{', '.join(att.tags)}]" for att in attractions]}
#
#         请返回一个不同的JSON格式行程计划，要求：
#         1. 使用不同的景点组合
#         2. 调整每天的行程顺序
#         3. 创建新的每日主题
#         4. 保持相同的天数和城市
#
#         结构如下：
#         {{
#             "title": "新行程标题(与之前不同)",
#             "description": "新行程描述",
#             "suitable_for": "适合人群描述",
#             "days": [
#                 {{
#                     "day": 1,
#                     "theme": "新当日主题",
#                     "description": "当日描述",
#                     "transport": "交通方式描述",
#                     "attractions": [
#                         {{
#                             "id": 景点ID,
#                             "name": "景点名称",
#                             "visit_time": "建议参观时间",
#                             "notes": "备注信息"
#                         }}
#                     ]
#                 }}
#             ]
#         }}
#         """
#
# import json
# from django.db.models import Q
# from django.conf import settings
# from openai import OpenAI
# from .models import City, Attraction
#
#
# class MoonshotAIService:
#     """
#     红色文化旅游规划服务类
#     严格限定只选择烈士陵园、革命纪念馆、红色博物馆等红色文化景点
#     """
#
#     # 定义合法的红色景点类型标签
#     RED_ATTRACTION_TAGS = ['martyrs', 'memorial', 'museum', 'revolution', '红色旅游']
#
#     @staticmethod
#     def generate_travel_plan(preference, is_regeneration=False, previous_plan=None):
#         """
#         生成红色文化主题旅行计划
#         :param preference: 偏好设置(dict或Django模型)
#         :param is_regeneration: 是否重新生成
#         :param previous_plan: 原行程(重新生成时用)
#         :return: 行程计划(dict)或错误信息
#         """
#         # 1. 参数解析
#         params = MoonshotAIService._parse_preferences(preference)
#         if 'error' in params:
#             return params
#
#         cities, days, interests, transport, custom_reqs = params
#
#         # 2. 获取红色文化景点
#         attractions = MoonshotAIService._get_red_attractions(cities)
#         if isinstance(attractions, dict) and 'error' in attractions:
#             return attractions
#
#         # 3. 构建AI提示词
#         prompt = MoonshotAIService._build_prompt(
#             cities, days, interests, transport,
#             custom_reqs, attractions, is_regeneration, previous_plan
#         )
#
#         # 4. 调用AI接口
#         plan = MoonshotAIService._call_moonshot_api(prompt, is_regeneration)
#         if 'error' in plan:
#             return plan
#
#         # 5. 验证结果
#         if not MoonshotAIService._validate_red_plan(plan):
#             return {
#                 "error": "行程验证失败",
#                 "details": "生成的行程不符合红色文化主题要求"
#             }
#
#         return plan
#
#     @staticmethod
#     def _parse_preferences(preference):
#         """解析偏好参数"""
#         try:
#             if isinstance(preference, dict):
#                 city_ids = preference.get('city_ids', [])
#                 cities = City.objects.filter(id__in=city_ids)
#                 days = preference.get('days', 3)
#                 interests = preference.get('interests', [])
#                 transport = preference.get('transport', 'public')
#                 custom_reqs = preference.get('custom_requirements', '')
#             else:
#                 cities = preference.cities.all()
#                 days = preference.days
#                 interests = preference.interests
#                 transport = preference.get_transport_display()
#                 custom_reqs = preference.custom_requirements or '无'
#
#             if not cities.exists():
#                 return {"error": "未选择有效城市", "details": "请至少选择一个城市"}
#
#             return cities, days, interests, transport, custom_reqs
#
#         except Exception as e:
#             return {"error": "参数解析失败", "details": str(e)}
#
#     @staticmethod
#     def _get_red_attractions(cities):
#         """获取红色文化景点"""
#         try:
#             # 精确查询
#             attractions = Attraction.objects.filter(
#                 city__in=cities,
#                 tags__overlap=MoonshotAIService.RED_ATTRACTION_TAGS
#             ).distinct()
#
#             # 放宽条件查询
#             if not attractions.exists():
#                 attractions = Attraction.objects.filter(
#                     city__in=cities,
#                     name__iregex=r'革命|烈士|党史|红色|纪念馆'
#                 )
#
#             if not attractions.exists():
#                 red_cities = ["北京", "延安", "井冈山", "遵义", "韶山"]
#                 return {
#                     "error": "未找到红色景点",
#                     "details": "当前城市未找到红色文化景点",
#                     "suggestion": f"建议选择{','.join(red_cities)}等红色旅游城市"
#                 }
#
#             return attractions
#
#         except Exception as e:
#             return {"error": "景点查询失败", "details": str(e)}
#
#     @staticmethod
#     def _build_prompt(cities, days, interests, transport, custom_reqs, attractions, is_regeneration, previous_plan):
#         """构建AI提示词"""
#         if is_regeneration:
#             return MoonshotAIService._build_red_regeneration_prompt(
#                 cities, days, interests, transport,
#                 custom_reqs, attractions, previous_plan
#             )
#         return MoonshotAIService._build_red_initial_prompt(
#             cities, days, interests, transport,
#             custom_reqs, attractions
#         )
#
#     @staticmethod
#     def _build_red_initial_prompt(cities, days, interests, transport, custom_reqs, attractions):
#         """红色文化初始行程提示词"""
#         city_names = [city.name for city in cities]
#         attraction_list = [
#             f"{att.name}[{'烈士纪念' if 'martyrs' in att.tags else '革命遗址' if 'revolution' in att.tags else '红色博物馆'}]"
#             for att in attractions
#         ]
#
#         return f"""
#         你是一个红色文化旅行规划专家，请严格按照以下要求规划行程：
#
#         **硬性要求**：
#         1. 所有景点必须为以下类型：
#            - 烈士陵园/纪念碑(含martyrs标签)
#            - 革命纪念馆/遗址(含memorial/revolution标签)
#            - 红色博物馆(含museum标签)
#         2. 每日主题必须包含党史/革命史教育内容
#         3. 景点顺序应符合历史时间线
#
#         **行程信息**：
#         - 城市：{city_names}
#         - 天数：{days}天
#         - 兴趣偏好：{interests if interests else '红色文化教育'}
#         - 交通方式：{transport}
#         - 特殊要求：{custom_reqs if custom_reqs else '无'}
#
#         **可选红色景点**：
#         {attraction_list}
#
#         **输出格式**：
#         {{
#             "title": "红色主题标题(必须含'红色'或'革命')",
#             "description": "突出爱国主义教育的描述",
#             "suitable_for": "适合人群(如：党员干部、学生等)",
#             "days": [
#                 {{
#                     "day": 1,
#                     "theme": "教育主题(如：'井冈山革命精神')",
#                     "description": "当日教育重点",
#                     "transport": "{transport}",
#                     "attractions": [
#                         {{
#                             "id": 景点ID,
#                             "name": "景点名称",
#                             "visit_time": "建议时长(如：2小时)",
#                             "notes": "具体教育意义(如：该景点展示了XX历史)"
#                         }}
#                     ]
#                 }}
#             ]
#         }}
#         """
#
#     @staticmethod
#     def _build_red_regeneration_prompt(cities, days, interests, transport, custom_reqs, attractions, previous_plan):
#         """红色文化重新生成提示词"""
#         prev_plan = json.dumps(previous_plan, ensure_ascii=False, indent=2) if previous_plan else "无"
#
#         return f"""
#         请基于相同偏好重新规划不同的红色文化行程：
#
#         **原行程**：
#         {prev_plan}
#
#         **新行程要求**：
#         1. 使用不同类型的红色景点(如原行程以纪念馆为主，新行程改为以博物馆为主)
#         2. 按新的历史视角安排(如按时间倒序)
#         3. 创建新的教育主题(如从"革命历程"改为"英雄人物")
#
#         **偏好设置**：
#         - 城市：{[city.name for city in cities]}
#         - 天数：{days}天
#         - 交通：{transport}
#         - 特殊要求：{custom_reqs or '无'}
#
#         **请返回新行程**：
#         {{
#             "title": "新红色主题(区别于原行程)",
#             "days": [
#                 {{
#                     "attractions": [
#                         {{
#                             "educational_focus": "新的教育侧重点"
#                         }}
#                     ]
#                 }}
#             ]
#         }}
#         """
#
#     @staticmethod
#     def _call_moonshot_api(prompt, is_regeneration):
#         """调用Moonshot AI接口"""
#         try:
#             client = OpenAI(
#                 api_key=settings.MOONSHOT_API_KEY,
#                 base_url="https://api.moonshot.cn/v1"
#             )
#
#             response = client.chat.completions.create(
#                 model="moonshot-v1-8k",
#                 messages=[
#                     {
#                         "role": "system",
#                         "content": "你是一个红色文化专家，严格按用户要求生成行程，不添加无关内容"
#                     },
#                     {"role": "user", "content": prompt}
#                 ],
#                 response_format={"type": "json_object"},
#                 temperature=0.7 if is_regeneration else 0.5
#             )
#
#             content = response.choices[0].message.content
#             return json.loads(content.strip())
#
#         except json.JSONDecodeError:
#             try:
#                 content = response.choices[0].message.content
#                 start = content.find('{')
#                 end = content.rfind('}') + 1
#                 return json.loads(content[start:end])
#             except:
#                 return {"error": "响应解析失败", "details": "无法解析AI返回的JSON"}
#
#         except Exception as e:
#             return {"error": "API调用失败", "details": str(e)}
#
#     @staticmethod
#     def _validate_red_plan(plan):
#         """验证行程是否符合红色主题"""
#         required_phrases = ['红色', '革命', '烈士', '党史', '爱国主义']
#         plan_str = json.dumps(plan, ensure_ascii=False)
#
#         # 检查关键词
#         if not any(phrase in plan_str for phrase in required_phrases):
#             return False
#
#         # 检查景点备注
#         for day in plan.get('days', []):
#             for attr in day.get('attractions', []):
#                 if not any(phrase in attr.get('notes', '') for phrase in required_phrases):
#                     return False
#
#         return True
class TravelPlanService:
    @staticmethod
    def create_travel_plan(plan_data):
        """
        根据输入数据创建旅行计划（无需登录版）
        :param plan_data: 包含 city_ids, days, interests, transport 等
        :return: 生成的旅行计划对象
        """
        try:
            # 1. 验证城市是否存在
            cities = City.objects.filter(id__in=plan_data['city_ids'])
            if not cities.exists():
                raise ValueError("选择的城市不存在")

            # 2. 调用AI生成计划数据
            moonshot_data = {
                'city_ids': plan_data['city_ids'],
                'days': plan_data['days'],
                'interests': plan_data['interests'],
                'transport': plan_data['transport'],
                'custom_requirements': plan_data.get('custom_requirements', '')
            }
            plan_data = MoonshotAIService.generate_travel_plan(moonshot_data)

            if not plan_data or 'error' in plan_data:
                return None

            # 3. 创建旅行计划（无用户关联）
            travel_plan = TravelPlan.objects.create(
                title=plan_data['title'],
                description=plan_data['description'],
                days=len(plan_data['days']),
                suitable_for=plan_data.get('suitable_for', ''),
                status='completed'
            )

            # 4. 创建每日计划
            for day_info in plan_data['days']:
                day_plan = DayPlan.objects.create(
                    travel_plan=travel_plan,
                    day=day_info['day'],
                    theme=day_info['theme'],
                    description=day_info.get('description', ''),
                    transport=day_info.get('transport', plan_data.get('transport', ''))
                )

                # 5. 添加每日景点
                for attraction_info in day_info['attractions']:
                    try:
                        attraction = Attraction.objects.get(id=attraction_info['id'])
                        DayPlanAttraction.objects.create(
                            day_plan=day_plan,
                            attraction=attraction,
                            order=attraction_info.get('order', 1),
                            visit_time=attraction_info.get('visit_time', ''),
                            notes=attraction_info.get('notes', '')
                        )
                    except Attraction.DoesNotExist:
                        continue

            return travel_plan

        except Exception as e:
            print(f"创建旅行计划失败: {str(e)}")
            return None

    @staticmethod
    def create_travel_plan_from_preference(preference):
        """
        根据用户偏好创建旅行计划（需要登录）
        """
        # 调用AI生成计划
        plan_data = MoonshotAIService.generate_travel_plan({
            'city_ids': list(preference.cities.values_list('id', flat=True)),
            'days': preference.days,
            'interests': preference.interests,
            'transport': preference.transport,
            'custom_requirements': preference.custom_requirements
        })

        if not plan_data or 'error' in plan_data:
            return None

        # 创建旅行计划
        travel_plan = TravelPlan.objects.create(
            user=preference.user,
            preference=preference,
            title=plan_data['title'],
            description=plan_data['description'],
            days=preference.days,
            suitable_for=plan_data.get('suitable_for', ''),
            status='completed'
        )

        # 创建每日计划
        for day_info in plan_data['days']:
            day_plan = DayPlan.objects.create(
                travel_plan=travel_plan,
                day=day_info['day'],
                theme=day_info['theme'],
                description=day_info.get('description', ''),
                transport=day_info.get('transport', '')
            )

            # 添加每日景点
            for attraction_info in day_info['attractions']:
                try:
                    attraction = Attraction.objects.get(id=attraction_info['id'])
                    DayPlanAttraction.objects.create(
                        day_plan=day_plan,
                        attraction=attraction,
                        order=attraction_info.get('order', 1),
                        visit_time=attraction_info.get('visit_time', ''),
                        notes=attraction_info.get('notes', '')
                    )
                except Attraction.DoesNotExist:
                    continue

        return travel_plan


class CacheService:
    @staticmethod
    def get_cities():
        """
        获取城市列表（带缓存）
        """
        cache_key = 'all_cities'
        cities = cache.get(cache_key)

        if not cities:
            cities = list(City.objects.filter(is_hot=True).values('id', 'name', 'code', 'image'))
            cache.set(cache_key, cities, timeout=3600)  # 缓存1小时

        return cities

    @staticmethod
    def get_attractions_by_city(city_id):
        """
        获取城市景点列表（带缓存）
        """
        cache_key = f'attractions_city_{city_id}'
        attractions = cache.get(cache_key)

        if not attractions:
            attractions = list(Attraction.objects.filter(city_id=city_id).values(
                'id', 'name', 'short_desc', 'image', 'tags'
            ))
            cache.set(cache_key, attractions, timeout=3600)  # 缓存1小时

        return attractions