"use client";

import { useState, useCallback } from 'react';
import { useQuery, useMutation } from '@apollo/client';
import {
    GET_SITE_OPS_CONFIG,
    GET_CONFIGS,
    GET_SITE_CONFIG,
    GET_NOTICE_MAINTENANCE_CONFIG,
    GET_DOCS_SUPPORT_CONFIG,
    GET_OPS_CONFIG,
    VALIDATE_CONFIG,
    UPDATE_SETTING,
    UPDATE_SETTINGS
} from '@/lib/config-queries';
import {
    SiteOpsConfigType,
    SiteConfigType,
    NoticeMaintenanceType,
    DocsSupportType,
    OpsConfigType,
    ConfigValidationResultType,
    ConfigUpdateInput,
    ConfigUpdateResult
} from '@/types/site-config';

// 使用完整的站点运营配置
export function useSiteOpsConfig() {
    const { data, loading, error, refetch } = useQuery<{ siteOpsConfig: SiteOpsConfigType }>(
        GET_SITE_OPS_CONFIG,
        {
            errorPolicy: 'all',
            notifyOnNetworkStatusChange: true
        }
    );

    return {
        config: data?.siteOpsConfig,
        loading,
        error,
        refetch
    };
}

// 使用通用配置列表（KV）
export interface ConfigItemType {
    id: string;
    key: string;
    value?: string | null;
    valueType: string;
    description?: string | null;
}

export function useConfigs() {
    const { data, loading, error, refetch } = useQuery<{ configs: ConfigItemType[] }>(
        GET_CONFIGS,
        {
            notifyOnNetworkStatusChange: true
        }
    );

    return {
        configs: data?.configs || [],
        loading,
        error,
        refetch
    };
}

// 使用站点配置
export function useSiteConfig() {
    const { data, loading, error, refetch } = useQuery<{ siteConfig: SiteConfigType }>(
        GET_SITE_CONFIG,
        {
            errorPolicy: 'all'
        }
    );

    return {
        config: data?.siteConfig,
        loading,
        error,
        refetch
    };
}

// 使用公告维护配置
export function useNoticeMaintenanceConfig() {
    const { data, loading, error, refetch } = useQuery<{ noticeMaintenanceConfig: NoticeMaintenanceType }>(
        GET_NOTICE_MAINTENANCE_CONFIG,
        {
            errorPolicy: 'all'
        }
    );

    return {
        config: data?.noticeMaintenanceConfig,
        loading,
        error,
        refetch
    };
}

// 使用文档支持配置
export function useDocsSupportConfig() {
    const { data, loading, error, refetch } = useQuery<{ docsSupportConfig: DocsSupportType }>(
        GET_DOCS_SUPPORT_CONFIG,
        {
            errorPolicy: 'all'
        }
    );

    return {
        config: data?.docsSupportConfig,
        loading,
        error,
        refetch
    };
}

// 使用运营配置
export function useOpsConfig() {
    const { data, loading, error, refetch } = useQuery<{ opsConfig: OpsConfigType }>(
        GET_OPS_CONFIG,
        {
            errorPolicy: 'all'
        }
    );

    return {
        config: data?.opsConfig,
        loading,
        error,
        refetch
    };
}

// 使用配置验证
export function useConfigValidation() {
    const { data, loading, error, refetch } = useQuery<{ validateConfig: ConfigValidationResultType }>(
        VALIDATE_CONFIG,
        {
            errorPolicy: 'all'
        }
    );

    return {
        validation: data?.validateConfig,
        loading,
        error,
        refetch
    };
}

// 配置更新hook
export function useConfigUpdater() {
    const [updateSetting] = useMutation<
        { updateSetting: ConfigUpdateResult },
        { key: string; value: string }
    >(UPDATE_SETTING);

    const [updateSettings] = useMutation<
        { updateSettings: ConfigUpdateResult & { failedKeys?: string[] } },
        { settings: ConfigUpdateInput[] }
    >(UPDATE_SETTINGS);

    const [updating, setUpdating] = useState(false);

    // 更新单个配置
    const updateConfig = useCallback(async (key: string, value: any): Promise<ConfigUpdateResult> => {
        setUpdating(true);
        try {
            const valueStr = (value === null || value === undefined) ? '' :
                (typeof value === 'object' && !Array.isArray(value)) ? JSON.stringify(value) :
                    String(value);
            const result = await updateSetting({
                variables: { key, value: valueStr }
            });

            return result.data?.updateSetting || { success: false, message: '更新失败' };
        } catch (error) {
            console.error('Update config error:', error);
            return { success: false, message: error instanceof Error ? error.message : '更新失败' };
        } finally {
            setUpdating(false);
        }
    }, [updateSetting]);

    // 批量更新配置
    const updateConfigs = useCallback(async (configs: ConfigUpdateInput[]): Promise<ConfigUpdateResult & { failedKeys?: string[] }> => {
        setUpdating(true);
        try {
            const result = await updateSettings({
                variables: { settings: configs }
            });

            return result.data?.updateSettings || { success: false, message: '批量更新失败' };
        } catch (error) {
            console.error('Update configs error:', error);
            return { success: false, message: error instanceof Error ? error.message : '批量更新失败' };
        } finally {
            setUpdating(false);
        }
    }, [updateSettings]);

    return {
        updateConfig,
        updateConfigs,
        updating
    };
}

// 将嵌套配置对象转换为平铺的键值对
export function flattenConfigObject(obj: any, prefix = ''): ConfigUpdateInput[] {
    const result: ConfigUpdateInput[] = [];

    for (const [key, value] of Object.entries(obj)) {
        const fullKey = prefix ? `${prefix}.${key}` : key;

        if (value && typeof value === 'object' && !Array.isArray(value) && !(value instanceof Date)) {
            // 递归处理嵌套对象
            result.push(...flattenConfigObject(value, fullKey));
        } else {
            // 处理基本类型、数组和日期，统一转换为字符串
            let stringValue: string;
            if (value === null || value === undefined) {
                stringValue = '';
            } else if (Array.isArray(value) || (typeof value === 'object' && value instanceof Date)) {
                // 数组或日期对象转换为JSON字符串
                stringValue = JSON.stringify(value);
            } else {
                // 布尔值、数字、字符串等都直接转换为字符串，避免双引号
                stringValue = String(value);
            }

            result.push({
                key: fullKey,
                value: stringValue
            });
        }
    }

    return result;
}

// 从平铺的配置重建嵌套对象
export function unflattenConfigObject(configs: { key: string; value: any }[]): any {
    const result: any = {};

    for (const config of configs) {
        const keys = config.key
        let current = result;
        result[keys] = config.value;
    }

    return result;
}