from fastapi import APIRouter, Depends, Request, UploadFile, File
from fastapi.responses import FileResponse
from sqlalchemy.orm import Session
from pydantic import BaseModel
from typing import Optional
from database import get_db
from models.total import PolicyFile
from services.oss_service import oss_service
import time
import json
import os

router = APIRouter()


@router.post("/oss/upload")
async def upload(
    request: Request,
    file: UploadFile = File(...)
):
    """OSS上传 - 对齐Go版本函数名"""
    user = request.state.user
    if not user:
        return {"statusCode": 401, "msg": "未授权"}
    
    try:
        content = await file.read()
        file_url = oss_service.upload_file(content, file.filename)
        return {
            "statusCode": 200,
            "msg": "上传成功",
            "data": {"file_url": file_url}
        }
    except Exception as e:
        return {"statusCode": 500, "msg": f"上传失败: {str(e)}"}


@router.post("/oss/shudao/upload_image")
async def upload_image(
    request: Request,
    file: UploadFile = File(...)
):
    """上传图片"""
    user = request.state.user
    if not user:
        return {"statusCode": 401, "msg": "未授权"}
    
    try:
        content = await file.read()
        file_url = oss_service.upload_image(content, file.filename)
        return {
            "statusCode": 200,
            "msg": "上传成功",
            "data": {"image_url": file_url}
        }
    except Exception as e:
        return {"statusCode": 500, "msg": f"上传失败: {str(e)}"}


class UploadJsonRequest(BaseModel):
    filename: str
    content: dict


@router.post("/oss/shudao/upload_json")
async def upload_ppt_json(
    request: Request,
    data: UploadJsonRequest
):
    """上传JSON文件 - 对齐Go版本函数名"""
    user = request.state.user
    if not user:
        return {"statusCode": 401, "msg": "未授权"}
    
    try:
        json_str = json.dumps(data.content, ensure_ascii=False)
        file_url = oss_service.upload_json(json_str, data.filename)
        return {
            "statusCode": 200,
            "msg": "上传成功",
            "data": {"file_url": file_url}
        }
    except Exception as e:
        return {"statusCode": 500, "msg": f"上传失败: {str(e)}"}


@router.get("/oss/parse")
async def parse_oss(url: str, request: Request):
    """OSS解析 - 对齐Go版本函数名"""
    user = request.state.user
    if not user:
        return {"statusCode": 401, "msg": "未授权"}
    
    try:
        decrypted_url = oss_service.parse_url(url)
        return {
            "statusCode": 200,
            "msg": "success",
            "data": {"url": decrypted_url}
        }
    except Exception as e:
        return {"statusCode": 500, "msg": f"解析失败: {str(e)}"}


@router.get("/get_file_link")
async def get_file_link(
    filename: str,
    request: Request
):
    """获取文件链接"""
    user = request.state.user
    if not user:
        return {"statusCode": 401, "msg": "未授权"}
    
    try:
        file_url = oss_service.get_signed_url(filename)
        return {
            "statusCode": 200,
            "msg": "success",
            "data": {"file_url": file_url}
        }
    except Exception as e:
        return {"statusCode": 500, "msg": f"获取失败: {str(e)}"}


# 以下路由已在 total.py / chat.py 中实现（含完整逻辑），此处不重复定义：
# - GET  /download_file       → routers/total.py（流式代理下载OSS）
# - POST /policy_file_count   → routers/total.py（view/download计数，字段 count_type）
# - POST /save_ppt_outline    → routers/chat.py（更新AIMessage.content）
# - POST /save_edit_document  → routers/chat.py（更新AIMessage.content）