"""
声纹采集API接口
"""
from fastapi import APIRouter, Depends, UploadFile, File, HTTPException
from typing import Optional
from pathlib import Path
import datetime

from app.models.models import VoiceprintStatus, VoiceprintTemplate
from app.core.auth import get_current_user
from app.core.response import create_api_response
from app.services.voiceprint_service import voiceprint_service
import app.core.config as config_module

router = APIRouter()


@router.get("/voiceprint/template", response_model=None)
def get_voiceprint_template(current_user: dict = Depends(get_current_user)):
    """
    获取声纹采集朗读模板配置

    权限：需要登录
    """
    try:
        template_data = VoiceprintTemplate(**config_module.VOICEPRINT_CONFIG)
        return create_api_response(code="200", message="获取朗读模板成功", data=template_data.dict())
    except Exception as e:
        return create_api_response(code="500", message=f"获取朗读模板失败: {str(e)}")


@router.get("/voiceprint/{user_id}", response_model=None)
def get_voiceprint_status(user_id: int, current_user: dict = Depends(get_current_user)):
    """
    获取用户声纹采集状态

    权限：用户只能查询自己的声纹状态，管理员可查询所有
    """
    # 权限检查：只能查询自己的声纹，或者是管理员
    if current_user['user_id'] != user_id and current_user['role_id'] != 1:
        return create_api_response(code="403", message="无权限查询其他用户的声纹状态")

    try:
        status_data = voiceprint_service.get_user_voiceprint_status(user_id)
        return create_api_response(code="200", message="获取声纹状态成功", data=status_data)
    except Exception as e:
        return create_api_response(code="500", message=f"获取声纹状态失败: {str(e)}")


@router.post("/voiceprint/{user_id}", response_model=None)
async def upload_voiceprint(
    user_id: int,
    audio_file: UploadFile = File(...),
    current_user: dict = Depends(get_current_user)
):
    """
    上传声纹音频文件（同步处理）

    权限：用户只能上传自己的声纹，管理员可操作所有
    """
    # 权限检查
    if current_user['user_id'] != user_id and current_user['role_id'] != 1:
        return create_api_response(code="403", message="无权限上传其他用户的声纹")

    # 检查文件格式
    file_ext = Path(audio_file.filename).suffix.lower()
    if file_ext not in config_module.ALLOWED_VOICEPRINT_EXTENSIONS:
        return create_api_response(
            code="400",
            message=f"不支持的文件格式，仅支持: {', '.join(config_module.ALLOWED_VOICEPRINT_EXTENSIONS)}"
        )

    # 检查文件大小
    max_size = config_module.VOICEPRINT_CONFIG.get('max_file_size', 5242880)  # 默认5MB
    content = await audio_file.read()
    file_size = len(content)

    if file_size > max_size:
        return create_api_response(
            code="400",
            message=f"文件过大，最大允许 {max_size / 1024 / 1024:.1f}MB"
        )

    try:
        # 确保用户目录存在
        user_voiceprint_dir = config_module.VOICEPRINT_DIR / str(user_id)
        user_voiceprint_dir.mkdir(parents=True, exist_ok=True)

        # 生成文件名：时间戳.wav
        timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
        filename = f"{timestamp}.wav"
        file_path = user_voiceprint_dir / filename

        # 保存文件
        with open(file_path, "wb") as f:
            f.write(content)

        # 调用服务处理声纹（提取特征向量，保存到数据库）
        result = voiceprint_service.save_voiceprint(user_id, str(file_path), file_size)

        return create_api_response(code="200", message="声纹采集成功", data=result)

    except Exception as e:
        # 如果出错，删除已上传的文件
        if 'file_path' in locals() and Path(file_path).exists():
            Path(file_path).unlink()

        return create_api_response(code="500", message=f"声纹采集失败: {str(e)}")


@router.delete("/voiceprint/{user_id}", response_model=None)
def delete_voiceprint(user_id: int, current_user: dict = Depends(get_current_user)):
    """
    删除用户声纹数据，允许重新采集

    权限：用户只能删除自己的声纹，管理员可操作所有
    """
    # 权限检查
    if current_user['user_id'] != user_id and current_user['role_id'] != 1:
        return create_api_response(code="403", message="无权限删除其他用户的声纹")

    try:
        success = voiceprint_service.delete_voiceprint(user_id)

        if success:
            return create_api_response(code="200", message="声纹删除成功")
        else:
            return create_api_response(code="404", message="未找到该用户的声纹数据")

    except Exception as e:
        return create_api_response(code="500", message=f"删除声纹失败: {str(e)}")