from fastapi import APIRouter, HTTPException
from ..models.schemas import PriceRequest, PriceComparison, InstanceSearchRequest, InstanceSearchRequestV2
from ..core.config import AWS_REGION_NAMES, AZURE_REGION_NAMES, ALIYUN_REGION_NAMES
from ..core.instance_data import get_instance_info
from ..services import calculate_price
from ..services.aws.pricing_v2 import search_instances_v2
from typing import Dict, List, Any

router = APIRouter(prefix="/api")

@router.get("/regions")
async def get_regions(platform: str = "aws"):
    """获取指定平台的区域列表"""
    result = []
    
    if platform == "aws":
        for key in AWS_REGION_NAMES.keys():
            result.append({'code': key, 'name': AWS_REGION_NAMES[key]})
    elif platform == "azure":
        for key in AZURE_REGION_NAMES.keys():
            result.append({'code': key, 'name': AZURE_REGION_NAMES[key]})
    elif platform == "aliyun":
        for key in ALIYUN_REGION_NAMES.keys():
            result.append({'code': key, 'name': ALIYUN_REGION_NAMES[key]})
    else:
        raise HTTPException(status_code=400, detail=f"不支持的平台: {platform}")
    
    return result

@router.get("/instance-types")
async def get_instance_types(platform: str = "aws"):
    """获取指定平台的实例类型"""
    try:
        return get_instance_info(platform)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))

@router.post("/search-instances")
async def search_instances(request: InstanceSearchRequest):
    """搜索符合条件的实例类型"""
    try:
        # 验证必填参数
        if request.cpu_cores is None:
            raise HTTPException(status_code=400, detail="cpu_cores是必填参数")
        if request.memory_gb is None:
            raise HTTPException(status_code=400, detail="memory_gb是必填参数")
        if request.disk_gb is None:
            raise HTTPException(status_code=400, detail="disk_gb是必填参数")
        if request.region is None:
            raise HTTPException(status_code=400, detail="region是必填参数")
        
        # 获取实例信息
        try:
            instance_info = get_instance_info(request.platform)
        except ValueError as e:
            raise HTTPException(status_code=400, detail=str(e))
        
        matching_instances = []
        
        # 遍历所有实例类型
        for instance_type, info in instance_info.items():
            try:
                # 检查是否满足CPU要求（严格匹配）
                if request.cpu_cores and info['cpu'] != request.cpu_cores:
                    continue
                    
                # 检查是否满足内存要求（严格匹配）
                if request.memory_gb and info['memory'] != request.memory_gb:
                    continue
                
                # 计算价格
                price_info = await calculate_price(
                    platform=request.platform,
                    instance_type=instance_type,
                    region=request.region,
                    disk_gb=request.disk_gb,
                    operating_system=request.operating_system
                )
                
                # 添加到匹配列表
                matching_instances.append({
                    "instance_type": instance_type,
                    "description": info['description'],
                    "cpu": info['cpu'],
                    "memory": info['memory'],
                    "disk_gb": request.disk_gb,
                    "hourly_price": price_info['hourly_price'],
                    "monthly_price": price_info['monthly_price'],
                    "disk_monthly_price": price_info['disk_monthly_price'],
                    "total_monthly_price": price_info['total_monthly_price']
                })
            except Exception as e:
                print(f"计算价格时出错: {str(e)}")
        
        # 按总价格排序
        matching_instances.sort(key=lambda x: x['total_monthly_price'])
        
        return matching_instances
        
    except Exception as e:
        print(f"搜索实例时出错: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

@router.post("/search-instances-v2")
async def search_instances_v2_api(request: InstanceSearchRequestV2):
    """
    第二套搜索API - 通过MySQL数据库搜索符合条件的AWS实例
    """
    try:
        # 调用服务层函数
        instances = await search_instances_v2(
            region=request.region,
            cpu_cores=request.cpu_cores,
            memory_gb=request.memory_gb,
            disk_gb=request.disk_gb,
            operating_system=request.operating_system
        )
        
        return instances
    except Exception as e:
        print(f"搜索实例时出错: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))

@router.post("/compare-prices")
async def compare_prices(comparison: PriceComparison):
    """比较不同配置的价格"""
    try:
        results = []
        for config in comparison.configurations:
            # 根据请求中的平台参数调用对应的价格计算服务
            # 这里假设需要扩展PriceRequest模型，添加platform字段
            # 暂时默认为AWS
            platform = getattr(config, 'platform', 'aws')
            
            price = await calculate_price(
                platform=platform,
                instance_type=config.instance_type,
                region=config.region,
                operating_system=config.operating_system,
                disk_gb=config.disk_gb if hasattr(config, 'disk_gb') else 0
            )
            results.append({
                "configuration": config.dict(),
                "price": price
            })
        return results
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))