from fastapi import APIRouter, Depends, Request
from fastapi.responses import StreamingResponse
from sqlalchemy.orm import Session
from pydantic import BaseModel
from typing import Optional
from database import get_db
from models.total import RecommendQuestion, PolicyFile, FunctionCard, HotQuestion, FeedbackQuestion, User
from models.chat import AIMessage
from models.user_data import UserData
from services.oss_service import oss_service
from utils.crypto import decrypt_url
from utils.config import get_proxy_url
import time
import httpx

router = APIRouter()


@router.get("/recommend_question")
async def get_recommend_question(db: Session = Depends(get_db)):
    """获取推荐问题"""
    questions = db.query(RecommendQuestion).limit(10).all()
    return {
        "statusCode": 200,
        "msg": "success",
        "data": [{"id": q.id, "question": q.question} for q in questions]
    }


@router.get("/get_policy_file")
async def get_policy_file(
    policy_type: Optional[str] = None,
    page: int = 1,
    pageSize: int = 20,
    search: str = "",
    db: Session = Depends(get_db)
):
    """获取策略文件列表"""
    query = db.query(PolicyFile).filter(PolicyFile.is_deleted == 0)

    # 只有当policy_type有效且不为0或空字符串时才添加类型过滤
    if policy_type and policy_type != "" and policy_type != "0":
        try:
            policy_type_int = int(policy_type)
            query = query.filter(PolicyFile.policy_type == policy_type_int)
        except ValueError:
            pass  # 忽略无效的类型值
    
    if search:
        query = query.filter(PolicyFile.policy_name.like(f"%{search}%"))

    offset = (page - 1) * pageSize
    files = query.order_by(PolicyFile.updated_at.desc()).offset(
        offset).limit(pageSize).all()

    return {
        "statusCode": 200,
        "msg": "success",
        "data": [
            {
                "id": f.id,
                "policy_name": f.policy_name,
                "policy_file_url": get_proxy_url(f.policy_file_url),
                "policy_type": f.policy_type,
                "file_type": f.file_type,
                "file_tag": getattr(f, 'file_tag', ''),
                "publish_time": getattr(f, 'publish_time', f.created_at),
                "view_count": f.view_count,
                "created_at": f.created_at,
                "updated_at": f.updated_at
            }
            for f in files
        ]
    }


@router.get("/get_function_card")
async def get_function_card(
    function_type: Optional[int] = None,
    db: Session = Depends(get_db)
):
    """获取功能卡片"""
    query = db.query(FunctionCard).filter(FunctionCard.is_deleted == 0)
    if function_type is not None:
        query = query.filter(FunctionCard.function_type == function_type)

    cards = query.order_by(FunctionCard.id.asc()).limit(4).all()
    return {
        "statusCode": 200,
        "msg": "success",
        "data": [
            {
                "id": c.id,
                "function_title": c.function_title,
                "function_icon": c.function_icon,
                "function_content": c.function_content,
                "function_type": c.function_type
            }
            for c in cards
        ]
    }


@router.get("/get_hot_question")
async def get_hot_question(
    question_type: Optional[int] = None,
    db: Session = Depends(get_db)
):
    """获取热点问题（按点击量排序）"""
    query = db.query(HotQuestion).filter(HotQuestion.is_deleted == 0)
    if question_type is not None:
        query = query.filter(HotQuestion.question_type == question_type)

    questions = query.order_by(
        HotQuestion.click_count.desc(),
        HotQuestion.id.asc()
    ).limit(3).all()
    return {
        "statusCode": 200,
        "msg": "success",
        "data": [
            {
                "id": q.id,
                "question": q.question,
                "click_count": q.click_count or 0,
                "question_type": q.question_type
            }
            for q in questions
        ]
    }


class SubmitFeedbackRequest(BaseModel):
    feedback_type: str
    content: str
    contact: str = ""


@router.post("/submit_feedback")
async def submit_feedback(request: SubmitFeedbackRequest, req: Request, db: Session = Depends(get_db)):
    """提交意见反馈（对齐Go版本）"""
    # 从token获取user_id
    user = req.state.user
    user_id = user.id if user else 0

    # 映射反馈类型：支持中文描述和英文标识
    type_map = {
        "功能建议": 1, "bug": 1, "问题反馈": 1,
        "ui": 2, "界面优化": 2,
        "experience": 3, "体验问题": 3,
        "other": 4, "其他": 4
    }
    feedback_type_id = type_map.get(request.feedback_type, 4)

    feedback = FeedbackQuestion(
        feedback_type=feedback_type_id,
        feedback_content=request.content,
        feedback_user_phone=request.contact,
        user_id=user_id,
        created_at=int(time.time()),
        updated_at=int(time.time())
    )
    db.add(feedback)
    db.commit()

    return {
        "statusCode": 200,
        "msg": "感谢您的反馈！"
    }


class LikeDislikeRequest(BaseModel):
    ai_message_id: Optional[int] = None
    action: Optional[str] = None
    id: Optional[int] = None
    user_feedback: Optional[int] = None


FEEDBACK_NONE = 0
FEEDBACK_LIKE = 2
FEEDBACK_DISLIKE = 3
FEEDBACK_REWARD_POINTS = {
    FEEDBACK_NONE: 0,
    FEEDBACK_LIKE: 2,
    FEEDBACK_DISLIKE: 1,
}


def _resolve_like_dislike_payload(data: LikeDislikeRequest):
    message_id = data.ai_message_id or data.id
    if not message_id:
        return None, None, "缺少消息ID"

    if data.user_feedback is not None:
        feedback = int(data.user_feedback)
    else:
        action = (data.action or "").strip().lower()
        if action in ("like", "2"):
            feedback = FEEDBACK_LIKE
        elif action in ("dislike", "3"):
            feedback = FEEDBACK_DISLIKE
        elif action in ("", "none", "cancel", "0"):
            feedback = FEEDBACK_NONE
        else:
            return None, None, "反馈类型错误"

    if feedback not in (FEEDBACK_NONE, FEEDBACK_LIKE, FEEDBACK_DISLIKE):
        return None, None, "反馈类型错误"

    return message_id, feedback, None


def _find_current_points_holder(db: Session, user_info):
    user = db.query(User).filter(
        User.id == user_info.user_id,
        User.is_deleted == 0,
    ).first()
    if user:
        return user

    return db.query(UserData).filter(
        UserData.accountID == user_info.account,
    ).first()


@router.post("/like_and_dislike")
async def like_and_dislike(data: LikeDislikeRequest, request: Request, db: Session = Depends(get_db)):
    """Save AI message feedback and reward points to the current user."""
    user_info = request.state.user
    if not user_info:
        return {"statusCode": 401, "msg": "未认证"}

    message_id, feedback, error = _resolve_like_dislike_payload(data)
    if error:
        return {"statusCode": 400, "msg": error}

    message = db.query(AIMessage).filter(AIMessage.id == message_id).first()
    if not message:
        return {"statusCode": 404, "msg": "消息不存在"}

    if getattr(message, "user_id", user_info.user_id) != user_info.user_id:
        return {"statusCode": 403, "msg": "无权评价该消息"}

    points_holder = _find_current_points_holder(db, user_info)
    if not points_holder:
        return {"statusCode": 404, "msg": "未找到用户数据"}

    previous_feedback = int(message.user_feedback or 0)
    previous_points = FEEDBACK_REWARD_POINTS.get(previous_feedback, 0)
    current_points = FEEDBACK_REWARD_POINTS.get(feedback, 0)
    points_delta = current_points - previous_points

    try:
        message.user_feedback = feedback
        message.updated_at = int(time.time())

        new_balance = (points_holder.points or 0) + points_delta
        points_holder.points = new_balance

        db.commit()
    except Exception as e:
        db.rollback()
        return {"statusCode": 500, "msg": f"反馈提交失败: {str(e)}"}

    return {
        "statusCode": 200,
        "msg": "success",
        "data": {
            "ai_message_id": message_id,
            "user_feedback": feedback,
            "points_added": points_delta,
            "points_delta": points_delta,
            "new_balance": new_balance,
        },
    }


@router.get("/get_user_data_id")
async def get_user_data_id(request: Request, db: Session = Depends(get_db)):
    """通过 token 的 account_id 查询 UserData 主键"""
    user = request.state.user
    if not user:
        return {"statusCode": 401, "msg": "未认证"}

    user_data = db.query(UserData).filter(
        UserData.accountID == user.account).first()
    if not user_data:
        return {"statusCode": 404, "msg": "用户数据不存在"}

    return {
        "statusCode": 200,
        "msg": "success",
        "data": {"user_data_id": user_data.id}
    }


class PolicyFileCountRequest(BaseModel):
    policy_file_id: int


@router.post("/policy_file_count")
async def get_policy_file_view_and_download_count(request: PolicyFileCountRequest, db: Session = Depends(get_db)):
    """更新政策文件查看计数 - 对齐Go版本接口名"""
    policy_file = db.query(PolicyFile).filter(
        PolicyFile.id == request.policy_file_id).first()
    if not policy_file:
        return {"statusCode": 404, "msg": "文件不存在"}

    policy_file.view_count = (policy_file.view_count or 0) + 1
    policy_file.updated_at = int(time.time())
    db.commit()

    return {"statusCode": 200, "msg": "success"}


@router.get("/download_file")
async def get_pdf_oss_download_link(pdf_oss_download_link: str):
    """流式代理下载 OSS 文件（解密代理 URL）- 对齐Go版本接口名"""
    try:
        # 解密代理 URL 获取真实 OSS URL
        real_url = decrypt_url(pdf_oss_download_link)

        # 流式代理下载
        async with httpx.AsyncClient() as client:
            async with client.stream("GET", real_url) as response:
                if response.status_code != 200:
                    return {"statusCode": response.status_code, "msg": "文件下载失败"}

                # 获取文件名和内容类型
                content_type = response.headers.get(
                    "content-type", "application/octet-stream")
                content_disposition = response.headers.get(
                    "content-disposition", "")

                async def generate():
                    async for chunk in response.aiter_bytes():
                        yield chunk

                return StreamingResponse(
                    generate(),
                    media_type=content_type,
                    headers={
                        "Content-Disposition": content_disposition} if content_disposition else {}
                )
    except Exception as e:
        return {"statusCode": 500, "msg": f"下载失败: {str(e)}"}