import os
from collections import deque
from pathlib import Path

import yaml
from fastapi import APIRouter, Body, Depends, HTTPException

from src.storage.db.models import User
from server.utils.auth_middleware import get_admin_user, get_superadmin_user
from src import config, graph_base
from src.models.chat import test_chat_model_status, test_all_chat_models_status
from src.utils.logging_config import logger

system = APIRouter(prefix="/system", tags=["system"])

# =============================================================================
# === 健康检查分组 ===
# =============================================================================


@system.get("/health")
async def health_check():
    """系统健康检查接口（公开接口）"""
    return {"status": "ok", "message": "服务正常运行"}


# =============================================================================
# === 配置管理分组 ===
# =============================================================================


@system.get("/config")
def get_config(current_user: User = Depends(get_admin_user)):
    """获取系统配置"""
    return config.dump_config()


@system.post("/config")
async def update_config_single(key=Body(...), value=Body(...), current_user: User = Depends(get_admin_user)) -> dict:
    """更新单个配置项"""
    config[key] = value
    config.save()
    return config.dump_config()


@system.post("/config/update")
async def update_config_batch(items: dict = Body(...), current_user: User = Depends(get_admin_user)) -> dict:
    """批量更新配置项"""
    config.update(items)
    config.save()
    return config.dump_config()


@system.post("/restart")
async def restart_system(current_user: User = Depends(get_superadmin_user)):
    """重启系统（仅超级管理员）"""
    graph_base.start()
    return {"message": "系统已重启"}


@system.get("/logs")
def get_system_logs(current_user: User = Depends(get_admin_user)):
    """获取系统日志"""
    try:
        from src.utils.logging_config import LOG_FILE

        with open(LOG_FILE) as f:
            last_lines = deque(f, maxlen=1000)

        log = "".join(last_lines)
        return {"log": log, "message": "success", "log_file": LOG_FILE}
    except Exception as e:
        logger.error(f"获取系统日志失败: {e}")
        raise HTTPException(status_code=500, detail=f"获取系统日志失败: {str(e)}")


# =============================================================================
# === 信息管理分组 ===
# =============================================================================


def load_info_config():
    """加载信息配置文件"""
    try:
        # 配置文件路径
        brand_file_path = os.environ.get("YUXI_BRAND_FILE_PATH", "src/config/static/info.local.yaml")
        config_path = Path(brand_file_path)

        # 检查文件是否存在
        if not config_path.exists():
            logger.debug(f"The config file {config_path} does not exist, using default config")
            config_path = Path("src/config/static/info.template.yaml")

        # 读取配置文件
        with open(config_path, encoding="utf-8") as file:
            config = yaml.safe_load(file)

        return config

    except Exception as e:
        logger.error(f"Failed to load info config: {e}")
        return get_default_info_config()


def get_default_info_config():
    """获取默认信息配置"""
    return {
        "organization": {"name": "江南语析", "logo": "/favicon.svg", "avatar": "/avatar.jpg"},
        "branding": {
            "name": "Yuxi-Know",
            "title": "Yuxi-Know",
            "subtitle": "大模型驱动的知识库管理工具",
            "description": "结合知识库与知识图谱，提供更准确、更全面的回答",
        },
        "features": ["📚 灵活知识库", "🕸️ 知识图谱集成", "🤖 多模型支持"],
        "footer": {"copyright": "© 江南语析 2025 [WIP] v0.3.0"},
    }


@system.get("/info")
async def get_info_config():
    """获取系统信息配置（公开接口，无需认证）"""
    try:
        config = load_info_config()
        return {"success": True, "data": config}
    except Exception as e:
        logger.error(f"获取信息配置失败: {e}")
        raise HTTPException(status_code=500, detail="获取信息配置失败")


@system.post("/info/reload")
async def reload_info_config(current_user: User = Depends(get_admin_user)):
    """重新加载信息配置"""
    try:
        config = load_info_config()
        return {"success": True, "message": "配置重新加载成功", "data": config}
    except Exception as e:
        logger.error(f"重新加载信息配置失败: {e}")
        raise HTTPException(status_code=500, detail="重新加载信息配置失败")


# =============================================================================
# === OCR服务分组 ===
# =============================================================================


@system.get("/ocr/stats")
async def get_ocr_stats(current_user: User = Depends(get_admin_user)):
    """
    获取OCR服务使用统计信息
    返回各个OCR服务的处理统计和性能指标
    """
    try:
        from src.plugins._ocr import get_ocr_stats

        stats = get_ocr_stats()

        return {"status": "success", "stats": stats, "message": "OCR统计信息获取成功"}
    except Exception as e:
        logger.error(f"获取OCR统计信息失败: {str(e)}")
        return {"status": "error", "stats": {}, "message": f"获取OCR统计信息失败: {str(e)}"}


@system.get("/ocr/health")
async def check_ocr_services_health(current_user: User = Depends(get_admin_user)):
    """
    检查所有OCR服务的健康状态
    返回各个OCR服务的可用性信息
    """
    from src.plugins.document_processor_factory import DocumentProcessorFactory

    try:
        # 使用统一的健康检查接口
        health_status = DocumentProcessorFactory.check_all_health()

        # 转换为旧格式以保持API兼容性
        formatted_status = {}
        for service_name, health_info in health_status.items():
            formatted_status[service_name] = {
                "status": health_info.get("status", "unknown"),
                "message": health_info.get("message", ""),
                "details": health_info.get("details", {}),
            }

        # 计算整体健康状态
        overall_status = (
            "healthy" if any(svc["status"] == "healthy" for svc in formatted_status.values()) else "unhealthy"
        )

        return {
            "overall_status": overall_status,
            "services": formatted_status,
            "message": "OCR服务健康检查完成",
        }

    except Exception as e:
        logger.error(f"OCR健康检查失败: {str(e)}")
        return {
            "overall_status": "error",
            "services": {},
            "message": f"OCR健康检查失败: {str(e)}",
        }


# =============================================================================
# === 聊天模型状态检查分组 ===
# =============================================================================


@system.get("/chat-models/status")
async def get_chat_model_status(provider: str, model_name: str, current_user: User = Depends(get_admin_user)):
    """获取指定聊天模型的状态"""
    logger.debug(f"Checking chat model status: {provider}/{model_name}")
    try:
        status = await test_chat_model_status(provider, model_name)
        return {"status": status, "message": "success"}
    except Exception as e:
        logger.error(f"获取聊天模型状态失败 {provider}/{model_name}: {e}")
        return {
            "message": f"获取聊天模型状态失败: {e}",
            "status": {"provider": provider, "model_name": model_name, "status": "error", "message": str(e)},
        }


@system.get("/chat-models/all/status")
async def get_all_chat_models_status(current_user: User = Depends(get_admin_user)):
    """获取所有聊天模型的状态"""
    logger.debug("Checking all chat models status")
    try:
        status = await test_all_chat_models_status()
        return {"status": status, "message": "success"}
    except Exception as e:
        logger.error(f"获取所有聊天模型状态失败: {e}")
        return {"message": f"获取所有聊天模型状态失败: {e}", "status": {"models": {}, "total": 0, "available": 0}}