import { postgrestGet, type PostgrestParams } from "../postgrest-client";
import dayjs from 'dayjs';

/**
 * 从不同格式的 API 响应中提取数据
 * @param responseData API 响应数据
 * @returns 提取后的数据或 null
 */
function extractApiData<T>(responseData: unknown): T | null {
    if (!responseData) {
        console.warn('API响应数据为空');
        return null;
    }

    try {
        // 检查是否有错误信息
        if (typeof responseData === 'object' && responseData !== null) {
            // 错误检查: 检查错误码，一般成功的错误码是0或200
            if ('code' in responseData) {
                const code = (responseData as { code: number }).code;
                // 如果有错误码且不是成功状态
                if (code !== 0 && code !== 200) {
                    const errorMsg = 'msg' in responseData
                        ? (responseData as { msg: string }).msg
                        : '未知错误';
                    console.error(`API响应错误: [${code}] ${errorMsg}`);
                    return null;
                }
            }

            // 错误检查: 检查是否包含错误消息但没有数据
            if ('error' in responseData && (responseData as { error: unknown }).error) {
                const error = (responseData as { error: unknown }).error;
                console.error(`API响应包含错误: ${typeof error === 'string' ? error : JSON.stringify(error)}`);
                return null;
            }

            // 格式1: { code: number, msg: string, data: T }
            if ('data' in responseData) {
                const data = (responseData as { data: unknown }).data;
                if (!data) {
                    console.warn('API响应中的data字段为空');
                    return null;
                }
                return data as T;
            }
        }

        // 格式2: 直接是数据对象
        return responseData as T;
    } catch (error) {
        console.error('处理API响应数据时出错:', error);
        return null;
    }
}

/**
 * 首页数据统计响应类型
 */
interface HomeStatistics {
    todayPendingFiles: number;
    monthlyReviewedFiles: number;
    monthlyReviewGrowth: {
        value: number;
        isUp: boolean;
    };
    monthlyPassRate: number;
    passRateGrowth: {
        value: number;
        isUp: boolean;
    };
    issuesDetected: number;
    issuesGrowth: {
        value: number;
        isUp: boolean;
    };
}

/**
 * 通过传入的 reviewType 参数构建类型过滤条件
 * @param reviewType 文档类型
 * @returns 过滤条件字符串
 */
function buildTypeFilter(reviewType: string | null): string {
    let typeFilter = '';
    if (reviewType === 'contract') {
        typeFilter = 'type_id.eq.1';
    } else if (reviewType === 'record') {
        typeFilter = '(type_id.eq.2,type_id.eq.3)';
    }
    return typeFilter;
}

/**
 * 获取主页数据
 * @param reviewType 从客户端传入的 reviewType 值
 * @returns 主页数据
 */
export async function getHomeData(reviewType?: string | null): Promise<HomeStatistics> {
    try {
        // 获取当前日期和时间相关值
        const startOfToday = dayjs().startOf('day').format('YYYY-MM-DD HH:mm:ss');
        const startOfThisMonth = dayjs().startOf('month').format('YYYY-MM-DD HH:mm:ss');
        const endOfThisMonth = dayjs().endOf('month').format('YYYY-MM-DD HH:mm:ss');
        const startOfLastMonth = dayjs().subtract(1, 'month').startOf('month').format('YYYY-MM-DD HH:mm:ss');
        const endOfLastMonth = dayjs().subtract(1, 'month').endOf('month').format('YYYY-MM-DD HH:mm:ss');

        // console.log('传入的 reviewType', reviewType);
        
        // 基于 reviewType 构建类型过滤条件
        const typeFilter = buildTypeFilter(reviewType || null);
        // console.log('构建的 typeFilter', typeFilter);

        // 通用API响应处理函数
        const handleApiResponse = async <T>(
            apiCall: Promise<{
                data?: unknown;
                headers?: Record<string, string>;
                error?: string;
                status?: number
            }>,
            errorMessage: string,
            defaultValue: T
        ): Promise<T> => {
            try {
                const response = await apiCall;
                if (response.error) {
                    console.error(`${errorMessage}: ${response.error}`);
                    return defaultValue;
                }
                const data = extractApiData<T>(response.data);
                if (!data) {
                    console.warn(`${errorMessage}: 无法提取有效数据`);
                    return defaultValue;
                }
                return data;
            } catch (error) {
                console.error(`${errorMessage}: ${error instanceof Error ? error.message : '未知错误'}`);
                return defaultValue;
            }
        };

        // 1. 今日待审核文件 - 获取今天的待审核文件数量 (audit_status = 0 或 2)
        const todayPendingParams: PostgrestParams = {
            select: 'count',
            filter: {
                or: `(audit_status.eq.0,audit_status.eq.2,audit_status.is.null)`,
                created_at: `gte.${startOfToday}`,
                is_test_document: `eq.false`
            }
        };
        
        // 添加类型过滤条件
        if (typeFilter) {
            if (typeFilter.startsWith('(')) {
                // 确保 filter 已初始化
                if (!todayPendingParams.filter) {
                    todayPendingParams.filter = {};
                }
                todayPendingParams.filter.or = typeFilter + ',' + todayPendingParams.filter.or;
            } else {
                const [field, op, value] = typeFilter.split('.');
                if (!todayPendingParams.filter) {
                    todayPendingParams.filter = {};
                }
                todayPendingParams.filter[field] = `${op}.${value}`;
            }
        }

        const todayPendingCount = await handleApiResponse<{ count: number }[]>(
            postgrestGet('documents', todayPendingParams),
            '获取今日待审核文件数量失败',
            []
        );
        const todayPendingFiles = todayPendingCount[0]?.count || 0;

        // 2. 本月已审核文件 - 获取本月已审核文件数量 (audit_status != 0 且 != 2)
        const thisMonthReviewedParams: PostgrestParams = {
            select: 'count',
            filter: {
                and: `(audit_status.neq.0,audit_status.neq.2)`,
                updated_at: `gte.${startOfThisMonth}`,
                is_test_document: `eq.false`
            }
        };
        
        // 添加类型过滤条件
        if (typeFilter) {
            if (typeFilter.startsWith('(')) {
                thisMonthReviewedParams.or = typeFilter;
            } else {
                const [field, op, value] = typeFilter.split('.');
                if (!thisMonthReviewedParams.filter) {
                    thisMonthReviewedParams.filter = {};
                }
                thisMonthReviewedParams.filter[field] = `${op}.${value}`;
            }
        }

        const thisMonthReviewedCount = await handleApiResponse<{ count: number }[]>(
            postgrestGet('documents', thisMonthReviewedParams),
            '获取本月已审核文件数量失败',
            []
        );
        // 本月已审核文件数量
        const monthlyReviewedFiles = thisMonthReviewedCount[0]?.count || 0;

        // 上月已审核文件
        const lastMonthReviewedParams: PostgrestParams = {
            select: 'count',
            filter: {
                or: `(audit_status.eq.1,audit_status.eq.-1)`,
                and: `(updated_at.gte.${startOfLastMonth},updated_at.lte.${endOfLastMonth})`,
                is_test_document: `eq.false`
            }
        };
        
        // 添加类型过滤条件
        if (typeFilter) {
            if (typeFilter.startsWith('(')) {
                // 确保 filter 已初始化
                if (!lastMonthReviewedParams.filter) {
                    lastMonthReviewedParams.filter = {};
                }
                lastMonthReviewedParams.filter.or = lastMonthReviewedParams.filter.or + ',' + typeFilter;
            } else {
                const [field, op, value] = typeFilter.split('.');
                if (!lastMonthReviewedParams.filter) {
                    lastMonthReviewedParams.filter = {};
                }
                lastMonthReviewedParams.filter[field] = `${op}.${value}`;
            }
        }

        const lastMonthReviewedCount = await handleApiResponse<{ count: number }[]>(
            postgrestGet('documents', lastMonthReviewedParams),
            '获取上月已审核文件数量失败',
            []
        );
        // 上月已审核文件数量
        const lastMonthReviewed = lastMonthReviewedCount[0]?.count || 0;
        
        // 计算同比增长
        let reviewGrowthValue = 0;
        let reviewGrowthIsUp = true;
        if (lastMonthReviewed > 0) {
            const growthRate = ((monthlyReviewedFiles - lastMonthReviewed) / lastMonthReviewed) * 100;
            reviewGrowthValue = Math.abs(parseFloat(growthRate.toFixed(1)));
            reviewGrowthIsUp = growthRate >= 0;
        } else if (lastMonthReviewed == 0 && monthlyReviewedFiles > 0) {
            reviewGrowthValue = 100;
            reviewGrowthIsUp = true;
        }

        // 3. 审核通过率 - 本月审核通过率 
        const thisMonthTotalParams: PostgrestParams = {
            select: 'count',
            filter: {
                audit_status: `eq.1`,
                created_at: `gte.${startOfThisMonth}`,
                is_test_document: `eq.false`
            }
        };
        
        // 添加类型过滤条件
        if (typeFilter) {
            if (typeFilter.startsWith('(')) {
                thisMonthTotalParams.or = typeFilter;
            } else {
                const [field, op, value] = typeFilter.split('.');
                if (!thisMonthTotalParams.filter) {
                    thisMonthTotalParams.filter = {};
                }
                thisMonthTotalParams.filter[field] = `${op}.${value}`;
            }
        }

        const thisMonthTotalCount = await handleApiResponse<{ count: number }[]>(
            postgrestGet('documents', thisMonthTotalParams),
            '获取本月审核通过数量失败',
            []
        );
        // 本月审核通过数量
        const thisMonthPassTotal = thisMonthTotalCount[0]?.count || 0;

        // 本月审核通过率
        const monthlyPassRate = (thisMonthPassTotal > 0 && monthlyReviewedFiles > 0)
            ? parseFloat(((thisMonthPassTotal / monthlyReviewedFiles) * 100).toFixed(1))
            : 0;

        // 上月审核通过率
        const lastMonthTotalParams: PostgrestParams = {
            select: 'count',
            filter: {
                audit_status: `eq.1`,
                and: `(updated_at.gte.${startOfLastMonth},updated_at.lte.${endOfLastMonth})`,
                is_test_document: `eq.false`
            }
        };
        
        // 添加类型过滤条件
        if (typeFilter) {
            if (typeFilter.startsWith('(')) {
                lastMonthTotalParams.or = typeFilter;
            } else {
                const [field, op, value] = typeFilter.split('.');
                if (!lastMonthTotalParams.filter) {
                    lastMonthTotalParams.filter = {};
                }
                lastMonthTotalParams.filter[field] = `${op}.${value}`;
            }
        }

        const lastMonthTotalCount = await handleApiResponse<{ count: number }[]>(
            postgrestGet('documents', lastMonthTotalParams),
            '获取上月审核通过数量失败',
            []
        );
        // 上月审核通过数量
        const lastMonthTotal = lastMonthTotalCount[0]?.count || 0;

        // 上月审核通过率
        const lastMonthPassRate = (lastMonthTotal > 0 && lastMonthReviewed > 0)
            ? parseFloat(((lastMonthTotal / lastMonthReviewed) * 100).toFixed(1))
            : 0;

        // console.log('上个月-------', lastMonthPassRate);

        // 计算通过率同比增长
        let passRateGrowthValue = 0;
        let passRateGrowthIsUp = true;



        if (lastMonthPassRate > 0) {
            const passRateGrowth = ((monthlyPassRate - lastMonthPassRate) / lastMonthPassRate) * 100;
            passRateGrowthValue = Math.abs(parseFloat(passRateGrowth.toFixed(1)));
            passRateGrowthIsUp = passRateGrowth >= 0;
        } else if (lastMonthPassRate == 0 && monthlyPassRate > 0) {
            passRateGrowthValue = 100;
            passRateGrowthIsUp = true;
        }

        // console.log('上月通过率-------', lastMonthPassRate);
        // console.log('本月通过率-------', monthlyPassRate);

        // 4. 检查出的问题总数（从评估结果表中统计）
        // 使用新的数据库函数 count_evaluation_results_by_type 获取指定类型文档的问题数量
        let thisMonthIssuesCount = 0;
        let lastMonthIssuesCount = 0;
        
        // 根据 reviewType 设置要查询的文档类型
        if (reviewType === 'contract') {
          // 合同类型 - 直接查询类型 1
          const typeToQuery = 1;
          
          // 调用数据库函数获取本月指定类型的问题数量
          const thisMonthIssuesResponse = await handleApiResponse<{ count: number }[]>(
            postgrestGet(`rpc/count_evaluation_results_by_type?type_val=${typeToQuery}&start_time=${startOfThisMonth}&end_time=${endOfThisMonth}`, {
              select: '*',
              filter: {}
            }),
            '获取本月问题数据失败',
            []
          );
          
          // 本月问题数量
          thisMonthIssuesCount = thisMonthIssuesResponse[0]?.count || 0;
          
          // 调用数据库函数获取上月指定类型的问题数量
          const lastMonthIssuesResponse = await handleApiResponse<{ count: number }[]>(
            postgrestGet(`rpc/count_evaluation_results_by_type?type_val=${typeToQuery}&start_time=${startOfLastMonth}&end_time=${endOfLastMonth}`, {
              select: '*',
              filter: {}
            }),
            '获取上月问题数据失败',
            []
          );
          
          // 上月问题数量
          lastMonthIssuesCount = lastMonthIssuesResponse[0]?.count || 0;
          
        } else if (reviewType === 'record') {
          // 记录类型 - 需要查询类型 2 和类型 3，并合并结果
          
          // 查询类型 2 的本月问题数量
          const thisMonthType2Response = await handleApiResponse<{ count: number }[]>(
            postgrestGet(`rpc/count_evaluation_results_by_type?type_val=2&start_time=${startOfThisMonth}&end_time=${endOfThisMonth}`, {
              select: '*',
              filter: {}
            }),
            '获取本月类型2问题数据失败',
            []
          );
          
          // 查询类型 3 的本月问题数量
          const thisMonthType3Response = await handleApiResponse<{ count: number }[]>(
            postgrestGet(`rpc/count_evaluation_results_by_type?type_val=3&start_time=${startOfThisMonth}&end_time=${endOfThisMonth}`, {
              select: '*',
              filter: {}
            }),
            '获取本月类型3问题数据失败',
            []
          );
          
          // 合并本月两种类型的问题数量
          const thisMonthType2Count = thisMonthType2Response[0]?.count || 0;
          const thisMonthType3Count = thisMonthType3Response[0]?.count || 0;
          thisMonthIssuesCount = thisMonthType2Count + thisMonthType3Count;
          
          // 查询类型 2 的上月问题数量
          const lastMonthType2Response = await handleApiResponse<{ count: number }[]>(
            postgrestGet(`rpc/count_evaluation_results_by_type?type_val=2&start_time=${startOfLastMonth}&end_time=${endOfLastMonth}`, {
              select: '*',
              filter: {}
            }),
            '获取上月类型2问题数据失败',
            []
          );
          
          // 查询类型 3 的上月问题数量
          const lastMonthType3Response = await handleApiResponse<{ count: number }[]>(
            postgrestGet(`rpc/count_evaluation_results_by_type?type_val=3&start_time=${startOfLastMonth}&end_time=${endOfLastMonth}`, {
              select: '*',
              filter: {}
            }),
            '获取上月类型3问题数据失败',
            []
          );
          
          // 合并上月两种类型的问题数量
          const lastMonthType2Count = lastMonthType2Response[0]?.count || 0;
          const lastMonthType3Count = lastMonthType3Response[0]?.count || 0;
          lastMonthIssuesCount = lastMonthType2Count + lastMonthType3Count;
          
        } else {
          // 如果没有指定类型，则使用原来的查询方式获取所有类型的问题数量
          const thisMonthIssuesParams: PostgrestParams = {
            select: 'count',
            filter: {
              and: `(created_at.gte.${startOfThisMonth},created_at.lte.${endOfThisMonth})`,
              'evaluated_results->result': 'eq.false'  // 使用->操作符访问JSONB字段
            }
          };
          
          // 添加类型过滤条件
          if (typeFilter) {
            if (typeFilter.startsWith('(')) {
              thisMonthIssuesParams.or = typeFilter;
            } else {
              const [field, op, value] = typeFilter.split('.');
              if (!thisMonthIssuesParams.filter) {
                thisMonthIssuesParams.filter = {};
              }
              thisMonthIssuesParams.filter[field] = `${op}.${value}`;
            }
          }
          
          const thisMonthIssuesResponse = await handleApiResponse<{ count: number }[]>(
            postgrestGet('evaluation_results', thisMonthIssuesParams),
            '获取本月问题数据失败',
            []
          );
          
          // 本月问题数量
          thisMonthIssuesCount = thisMonthIssuesResponse[0]?.count || 0;
          
          // 上月问题数量
          const lastMonthIssuesParams: PostgrestParams = {
            select: 'count',
            filter: {
              and: `(created_at.gte.${startOfLastMonth},created_at.lte.${endOfLastMonth})`,
              'evaluated_results->result': 'eq.false'  // 使用->操作符访问JSONB字段
            }
          };
          
          // 添加类型过滤条件
          if (typeFilter) {
            if (typeFilter.startsWith('(')) {
              lastMonthIssuesParams.or = typeFilter;
            } else {
              const [field, op, value] = typeFilter.split('.');
              if (!lastMonthIssuesParams.filter) {
                lastMonthIssuesParams.filter = {};
              }
              lastMonthIssuesParams.filter[field] = `${op}.${value}`;
            }
          }
          
          const lastMonthIssuesResponse = await handleApiResponse<{ count: number }[]>(
            postgrestGet('evaluation_results', lastMonthIssuesParams),
            '获取上月问题数据失败',
            []
          );
          
          // 上月问题数量
          lastMonthIssuesCount = lastMonthIssuesResponse[0]?.count || 0;
        }

        // 计算问题数量同比增长
        let issuesGrowthValue = 0;
        let issuesGrowthIsUp = true;


        if (lastMonthIssuesCount > 0) {
            const issuesGrowth = ((thisMonthIssuesCount - lastMonthIssuesCount) / lastMonthIssuesCount) * 100;
            issuesGrowthValue = Math.abs(parseFloat(issuesGrowth.toFixed(1)));
            issuesGrowthIsUp = issuesGrowth >= 0;
        }else if(lastMonthIssuesCount == 0 && thisMonthIssuesCount > 0){
            issuesGrowthValue = 100;
            issuesGrowthIsUp = true;
        }
        // 返回统计结果
        return {
            todayPendingFiles,
            monthlyReviewedFiles,
            monthlyReviewGrowth: {
                value: reviewGrowthValue,
                isUp: reviewGrowthIsUp
            },
            monthlyPassRate,
            passRateGrowth: {
                value: passRateGrowthValue,
                isUp: passRateGrowthIsUp
            },
            issuesDetected: thisMonthIssuesCount,
            issuesGrowth: {
                value: issuesGrowthValue,
                isUp: issuesGrowthIsUp
            }
        };
    } catch (error) {
        console.error('获取首页数据失败:', error instanceof Error ? error.message : String(error));
        // 返回默认值以防止页面崩溃
        return {
            todayPendingFiles: 0,
            monthlyReviewedFiles: 0,
            monthlyReviewGrowth: { value: 0, isUp: true },
            monthlyPassRate: 0,
            passRateGrowth: { value: 0, isUp: true },
            issuesDetected: 0,
            issuesGrowth: { value: 0, isUp: true }
        };
    }
}