"""
农业投入Cd通量计算API接口
@description: 提供各个地区的农业投入输入Cd通量预测计算功能
"""

from fastapi import APIRouter, HTTPException, Query, Body
from fastapi.responses import FileResponse
from pydantic import BaseModel, Field
from typing import Dict, Any, Optional
import logging
import os
from ..services.agricultural_input_service import AgriculturalInputService

router = APIRouter()

# =============================================================================
# 数据模型定义
# =============================================================================

class VisualizationResponse(BaseModel):
    """
    可视化结果响应模型
    
    @description: 绘图接口的响应格式
    """
    success: bool = Field(..., description="是否成功")
    message: str = Field(..., description="响应消息")
    data: Optional[Dict[str, Any]] = Field(None, description="可视化结果数据")
    files: Optional[Dict[str, str]] = Field(None, description="生成的文件路径")


class CdFluxCalculationRequest(BaseModel):
    """
    农业投入Cd通量计算请求模型
    
    @description: 用户提供的计算参数
    """
    # 镉含量参数 (mg/kg)
    f3_nitrogen_cd_content: float = Field(..., description="氮肥镉含量平均值 (mg/kg)", ge=0)
    f4_phosphorus_cd_content: float = Field(..., description="磷肥镉含量平均值 (mg/kg)", ge=0)
    f5_potassium_cd_content: float = Field(..., description="钾肥镉含量平均值 (mg/kg)", ge=0)
    f6_compound_cd_content: float = Field(..., description="复合肥镉含量平均值 (mg/kg)", ge=0)
    f7_organic_cd_content: float = Field(..., description="有机肥镉含量平均值 (mg/kg)", ge=0)
    f8_pesticide_cd_content: float = Field(..., description="农药镉含量 (mg/kg)", ge=0)
    f9_farmyard_cd_content: float = Field(..., description="农家肥镉含量 (mg/kg)", ge=0)
    f10_film_cd_content: float = Field(..., description="农膜镉含量 (mg/kg)", ge=0)
    
    # 使用量参数 (t/ha/a)
    nf_nitrogen_usage: float = Field(..., description="氮肥单位面积使用量 (t/ha/a)", ge=0)
    pf_phosphorus_usage: float = Field(..., description="磷肥单位面积使用量 (t/ha/a)", ge=0)
    kf_potassium_usage: float = Field(..., description="钾肥单位面积使用量 (t/ha/a)", ge=0)
    cf_compound_usage: float = Field(..., description="复合肥单位面积使用量 (t/ha/a)", ge=0)
    of_organic_usage: float = Field(..., description="有机肥单位面积使用量 (t/ha/a)", ge=0)
    p_pesticide_usage: float = Field(..., description="农药单位面积使用量 (t/ha/a)", ge=0)
    ff_farmyard_usage: float = Field(..., description="农家肥单位面积使用量 (t/ha/a)", ge=0)
    af_film_usage: float = Field(..., description="农膜(存留)单位面积使用量 (t/ha/a)", ge=0)
    
    # 可选的标识信息
    description: Optional[str] = Field(None, description="计算描述信息")

    model_config = {
        "json_schema_extra": {
            "example": {
                "f3_nitrogen_cd_content": 0.12,
                "f4_phosphorus_cd_content": 0.85,
                "f5_potassium_cd_content": 0.05,
                "f6_compound_cd_content": 0.45,
                "f7_organic_cd_content": 0.22,
                "f8_pesticide_cd_content": 0.08,
                "f9_farmyard_cd_content": 0.15,
                "f10_film_cd_content": 0.03,
                "nf_nitrogen_usage": 0.25,
                "pf_phosphorus_usage": 0.15,
                "kf_potassium_usage": 0.12,
                "cf_compound_usage": 0.30,
                "of_organic_usage": 2.50,
                "p_pesticide_usage": 0.02,
                "ff_farmyard_usage": 1.80,
                "af_film_usage": 0.05,
                "description": "测试地区农业投入Cd通量计算"
            }
        }
    }

# 设置日志
logger = logging.getLogger(__name__)

# =============================================================================
# 农业投入Cd通量计算接口
# =============================================================================

@router.get("/calculate-by-area",
           summary="根据地区计算农业投入Cd通量",
           description="根据指定地区从Parameters表中获取数据并计算农业投入输入Cd通量")
async def calculate_cd_flux_by_area(
    area: str = Query(..., description="地区名称，如：韶关")
) -> Dict[str, Any]:
    """
    根据地区计算农业投入输入Cd通量
    
    @param area: 地区名称
    @returns: 计算结果包括总通量和各项明细
    
    计算公式：农业投入输入Cd(g/ha/a) = F3*NF + F4*PF + F5*KF + F6*CF + F7*OF + F8*P + F9*FF + F10*AF
    """
    try:
        service = AgriculturalInputService()
        result = service.calculate_cd_flux_by_area(area)
        
        if not result["success"]:
            raise HTTPException(
                status_code=404, 
                detail=result["message"]
            )
        
        return result
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"计算地区 '{area}' 的Cd通量失败: {str(e)}")
        raise HTTPException(
            status_code=500, 
            detail=f"计算失败: {str(e)}"
        )

@router.get("/calculate-all-areas",
           summary="计算所有地区的农业投入Cd通量",
           description="计算数据库中所有地区的农业投入输入Cd通量，并提供统计汇总")
async def calculate_all_areas_cd_flux() -> Dict[str, Any]:
    """
    计算所有地区的农业投入输入Cd通量
    
    @returns: 所有地区的计算结果，按通量从高到低排序，包含统计汇总
    """
    try:
        service = AgriculturalInputService()
        result = service.calculate_all_areas_cd_flux()
        
        if not result["success"]:
            raise HTTPException(
                status_code=500, 
                detail=result["message"]
            )
        
        return result
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"计算所有地区Cd通量失败: {str(e)}")
        raise HTTPException(
            status_code=500, 
            detail=f"计算失败: {str(e)}"
        )

@router.get("/available-areas",
           summary="获取可用地区列表",
           description="获取数据库中所有可用于计算的地区列表")
async def get_available_areas() -> Dict[str, Any]:
    """
    获取数据库中所有可用的地区列表
    
    @returns: 可用地区列表
    """
    try:
        service = AgriculturalInputService()
        result = service.get_available_areas()
        
        if not result["success"]:
            raise HTTPException(
                status_code=500, 
                detail=result["message"]
            )
        
        return result
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"获取可用地区列表失败: {str(e)}")
        raise HTTPException(
            status_code=500, 
            detail=f"获取失败: {str(e)}"
        )

@router.post("/calculate-with-custom-data",
            summary="使用自定义数据计算农业投入Cd通量",
            description="接收用户提供的参数数据，直接进行农业投入输入Cd通量计算")
async def calculate_cd_flux_with_custom_data(
    request: CdFluxCalculationRequest = Body(..., description="计算所需的参数数据")
) -> Dict[str, Any]:
    """
    使用用户提供的自定义数据计算农业投入输入Cd通量
    
    @param request: 包含所有计算参数的请求体
    @returns: 计算结果包括总通量和各项明细
    
    计算公式：农业投入输入Cd(g/ha/a) = F3*NF + F4*PF + F5*KF + F6*CF + F7*OF + F8*P + F9*FF + F10*AF
    """
    try:
        service = AgriculturalInputService()
        result = service.calculate_cd_flux_with_custom_data(request)
        
        if not result["success"]:
            raise HTTPException(
                status_code=400, 
                detail=result["message"]
            )
        
        return result
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"使用自定义数据计算Cd通量失败: {str(e)}")
        raise HTTPException(
            status_code=500, 
            detail=f"计算失败: {str(e)}"
        )

@router.get("/calculation-formula",
           summary="获取计算公式说明",
           description="获取农业投入Cd通量的计算公式和参数说明")
async def get_calculation_formula() -> Dict[str, Any]:
    """
    获取农业投入Cd通量的计算公式和参数说明
    
    @returns: 公式和参数详细说明
    """
    try:
        formula_info = {
            "success": True,
            "message": "农业投入Cd通量计算公式",
            "data": {
                "formula": "农业投入输入Cd(g/ha/a) = F3*NF + F4*PF + F5*KF + F6*CF + F7*OF + F8*P + F9*FF + F10*AF",
                "unit": "g/ha/a",
                "parameters": {
                    "F3": "氮肥镉含量平均值(mg/kg)",
                    "F4": "磷肥镉含量平均值(mg/kg)",
                    "F5": "钾肥镉含量平均值(mg/kg)",
                    "F6": "复合肥镉含量平均值(mg/kg)",
                    "F7": "有机肥镉含量平均值(mg/kg)",
                    "F8": "农药镉含量(mg/kg)",
                    "F9": "农家肥镉含量(mg/kg)",
                    "F10": "农膜镉含量(mg/kg)",
                    "NF": "氮肥单位面积使用量(t/ha/a)",
                    "PF": "磷肥单位面积使用量(t/ha/a)",
                    "KF": "钾肥单位面积使用量(t/ha/a)",
                    "CF": "复合肥单位面积使用量(t/ha/a)",
                    "OF": "有机肥单位面积使用量(t/ha/a)",
                    "P": "农药单位面积使用量(t/ha/a)",
                    "FF": "农家肥单位面积使用量(t/ha/a)",
                    "AF": "农膜(存留)单位面积使用量(t/ha/a)"
                },
                "components": {
                    "nitrogen_fertilizer": "氮肥贡献量 = F3 × NF",
                    "phosphorus_fertilizer": "磷肥贡献量 = F4 × PF",
                    "potassium_fertilizer": "钾肥贡献量 = F5 × KF",
                    "compound_fertilizer": "复合肥贡献量 = F6 × CF",
                    "organic_fertilizer": "有机肥贡献量 = F7 × OF",
                    "pesticide": "农药贡献量 = F8 × P",
                    "farmyard_manure": "农家肥贡献量 = F9 × FF",
                    "agricultural_film": "农膜贡献量 = F10 × AF"
                }
            }
        }
        
        return formula_info
        
    except Exception as e:
        logger.error(f"获取计算公式失败: {str(e)}")
        raise HTTPException(
            status_code=500, 
            detail=f"获取失败: {str(e)}"
        )


# =============================================================================
# 农业投入Cd通量可视化接口
# =============================================================================

@router.get("/visualize",
           summary="生成农业投入Cd通量可视化图表",
           description="计算农业投入Cd通量并生成栅格地图，参数固定使用韶关数据，area用于地图边界")
async def visualize_agricultural_input(
    area: str = Query(..., description="地区名称，如：乐昌市（用于地图边界，参数固定使用韶关）"),
    level: str = Query(..., description="行政层级，必须为: county | city | province"),
    colormap: str = Query("green_yellow_red_purple", description="色彩方案"),
    resolution_factor: float = Query(4.0, description="分辨率因子(默认4.0，更快)"),
    enable_interpolation: bool = Query(False, description="是否启用空间插值(默认关闭以提升性能)"),
    cleanup_intermediate: bool = Query(True, description="是否清理中间文件(默认是)")
):
    """
    生成农业投入Cd通量可视化图表
    
    @param area: 地区名称（用于地图边界，参数数据固定使用韶关）
    @param level: 行政层级
    @returns: 栅格地图文件
    
    功能包括：
    1. 计算农业投入Cd通量（参数固定使用韶关）
    2. 生成指定地区边界的栅格地图
    3. 直接返回图片文件
    """
    try:
        service = AgriculturalInputService()

        # 行政层级校验（不允许模糊）
        if level not in ("county", "city", "province"):
            raise HTTPException(status_code=400, detail="参数 level 必须为 'county' | 'city' | 'province'")
        
        # 计算农业投入Cd通量（使用韶关参数，area仅用于边界）
        calc_result = service.calculate_cd_flux_for_visualization(area)
        
        if not calc_result["success"]:
            raise HTTPException(
                status_code=404, 
                detail=calc_result["message"]
            )
        
        # 获取包含坐标的结果数据
        results_with_coords = service.get_coordinates_for_results(calc_result["data"], area)
        
        if not results_with_coords:
            raise HTTPException(
                status_code=404,
                detail=f"未找到地区 '{area}' 的坐标数据，无法生成可视化"
            )
        
        # 创建可视化
        visualization_files = service.create_agricultural_input_visualization(
            area=area,
            level=level,
            calculation_type="agricultural_input",
            results_with_coords=results_with_coords,
            colormap=colormap,
            resolution_factor=resolution_factor,
            enable_interpolation=enable_interpolation,
            cleanup_intermediate=cleanup_intermediate
        )
        
        # 检查地图文件是否生成成功
        map_file = visualization_files.get("map")
        if not map_file or not os.path.exists(map_file):
            raise HTTPException(status_code=500, detail="地图文件生成失败")
        
        return FileResponse(
            path=map_file,
            filename=f"{area}_agricultural_input_cd_flux_map.jpg",
            media_type="image/jpeg"
        )
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"生成地区 '{area}' 的农业投入Cd通量可视化失败: {str(e)}")
        raise HTTPException(
            status_code=500, 
            detail=f"可视化生成失败: {str(e)}"
        )


@router.get("/export-data",
           summary="导出农业投入Cd通量计算数据",
           description="导出指定地区的农业投入Cd通量计算结果为CSV文件")
async def export_agricultural_input_data(
    area: str = Query(..., description="地区名称，如：韶关")
) -> Dict[str, Any]:
    """
    导出农业投入Cd通量计算数据
    
    @param area: 地区名称
    @returns: 导出结果和文件路径
    """
    try:
        service = AgriculturalInputService()
        
        # 计算农业投入Cd通量（使用韶关参数，area仅用于边界）
        calc_result = service.calculate_cd_flux_for_visualization(area)
        
        if not calc_result["success"]:
            raise HTTPException(
                status_code=404, 
                detail=calc_result["message"]
            )
        
        # 导出数据
        csv_path = service.export_results_to_csv(calc_result["data"])
        
        return {
            "success": True,
            "message": f"地区 '{area}' 的农业投入Cd通量数据导出成功",
            "data": {
                "area": area,
                "calculation_type": "agricultural_input",
                "exported_file": csv_path,
                "total_cd_flux": calc_result["data"]["total_cd_flux"],
                "unit": calc_result["data"]["unit"]
            }
        }
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"导出地区 '{area}' 的农业投入Cd通量数据失败: {str(e)}")
        raise HTTPException(
            status_code=500, 
            detail=f"数据导出失败: {str(e)}"
        )