package com.example.demo.service.cash;


import com.example.demo.Node.RefundApprovalNode;
import com.example.demo.config.cash.RefundApprovalFlowConfig;
import com.example.demo.domain.vo.cash.CashRecord;
import com.example.demo.domain.vo.cash.Market;
import com.example.demo.domain.vo.cash.RefundApprovalRecord;
import com.example.demo.domain.vo.cash.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;

@Slf4j
@Service
public class RefundApprovalService {

    private final MarketService marketService;

    // 退款审批流程配置缓存
    private static final Map<String, RefundApprovalFlowConfig> REFUND_APPROVAL_FLOW_CONFIG = new ConcurrentHashMap<>();

    // 角色定义
    public static final String ROLE_REGIONAL_FINANCE = "REGIONAL_FINANCE";
    public static final String ROLE_REGIONAL_MANAGER = "REGIONAL_MANAGER";
    public static final String ROLE_HEADQUARTERS_FINANCE = "HEADQUARTERS_FINANCE";
    public static final String ROLE_EXECUTOR = "EXECUTOR";
    public static final String ROLE_SUBMITTER = "SUBMITTER";

    public RefundApprovalService(MarketService marketService) {
        this.marketService = marketService;
        initializeRefundFlowConfigs();
    }

    // 初始化退款审批流程配置（基于地区ID）
    private void initializeRefundFlowConfigs() {
        // 获取市场部下的所有具体市场ID
        Set<Integer> specificMarketIds = marketService.getSpecificMarketIdsUnderMarketDepartment();

        // 为每个具体市场创建审批流程
        for (Integer marketId : specificMarketIds) {
            Market market = marketService.getMarketById(marketId);
            if (market != null) {
                List<RefundApprovalNode> flowNodes = createRefundFlowForMarket(market);
                REFUND_APPROVAL_FLOW_CONFIG.put(marketId.toString(),
                        new RefundApprovalFlowConfig(market.getName() + "退款审批流程", flowNodes));
            }
        }

        // 创建通用审批流程（用于没有特定配置的市场）
        List<RefundApprovalNode> commonRefundFlow = createCommonRefundFlow();
        REFUND_APPROVAL_FLOW_CONFIG.put("COMMON", new RefundApprovalFlowConfig("通用退款审批流程", commonRefundFlow));

        log.info("退款审批流程配置初始化完成，共配置{}个流程", REFUND_APPROVAL_FLOW_CONFIG.size());
    }

    private List<RefundApprovalNode> createRefundFlowForMarket(Market market) {
        Set<Integer> marketAndChildrenIds = new HashSet<>();
        marketAndChildrenIds.add(market.getId());
        marketAndChildrenIds.addAll(marketService.getAllChildrenIds(market.getId()));

        List<RefundApprovalNode> nodes = new ArrayList<>();
        nodes.add(new RefundApprovalNode("地区财务审核", 1, new String[]{ROLE_REGIONAL_FINANCE}, marketAndChildrenIds, true));
        nodes.add(new RefundApprovalNode("地区负责人审核", 2, new String[]{ROLE_REGIONAL_MANAGER}, marketAndChildrenIds, true));
        nodes.add(new RefundApprovalNode("总部财务审核", 3, new String[]{ROLE_HEADQUARTERS_FINANCE}, null, true)); // 总部不限制地区
        nodes.add(new RefundApprovalNode("执行人处理", 4, new String[]{ROLE_EXECUTOR}, null, true)); // 执行人不限制地区

        return nodes;
    }

    private List<RefundApprovalNode> createCommonRefundFlow() {
        List<RefundApprovalNode> nodes = new ArrayList<>();
        nodes.add(new RefundApprovalNode("地区财务审核", 1, new String[]{ROLE_REGIONAL_FINANCE}, null, true));
        nodes.add(new RefundApprovalNode("地区负责人审核", 2, new String[]{ROLE_REGIONAL_MANAGER}, null, true));
        nodes.add(new RefundApprovalNode("总部财务审核", 3, new String[]{ROLE_HEADQUARTERS_FINANCE}, null, true));
        nodes.add(new RefundApprovalNode("执行人处理", 4, new String[]{ROLE_EXECUTOR}, null, true));

        return nodes;
    }

    // 获取适合订单的审批流程（基于地区ID）
    private RefundApprovalFlowConfig getSuitableFlowConfig(CashRecord cashRecord) {
        Integer marketId = cashRecord.getPrimaryMarketId();
        if (marketId != null) {
            // 优先根据具体地区ID获取流程
            RefundApprovalFlowConfig specificConfig = REFUND_APPROVAL_FLOW_CONFIG.get(marketId.toString());
            if (specificConfig != null) {
                return specificConfig;
            }

            // 如果该市场没有特定配置，查找父级市场的配置
            Market market = marketService.getMarketById(marketId);
            if (market != null && market.getParentId() != null) {
                RefundApprovalFlowConfig parentConfig = REFUND_APPROVAL_FLOW_CONFIG.get(market.getParentId().toString());
                if (parentConfig != null) {
                    return parentConfig;
                }
            }
        }

        // 默认返回通用流程
        return REFUND_APPROVAL_FLOW_CONFIG.get("COMMON");
    }

    // 获取用户有权限审批的订单状态（基于地区ID）
    public List<Integer> getUserVisibleStatuses(User user, CashRecord cashRecord) {
        if (!cashRecord.isRefundOrder()) {
            return new ArrayList<>();
        }

        RefundApprovalFlowConfig flowConfig = getSuitableFlowConfig(cashRecord);
        if (flowConfig != null) {
            return flowConfig.getVisibleStatuses(user, cashRecord.getPrimaryMarketId());
        }

        log.warn("未找到适合订单地区{}的退款审批流程配置", cashRecord.getPrimaryMarketId());
        return new ArrayList<>();
    }

    // 检查用户是否有权限审批指定订单（基于地区ID）
    public boolean canUserApproveOrder(User user, CashRecord cashRecord) {
        if (!cashRecord.isRefundOrder() || !cashRecord.isInApprovalProcess()) {
            return false;
        }

        RefundApprovalFlowConfig flowConfig = getSuitableFlowConfig(cashRecord);
        if (flowConfig != null) {
            return flowConfig.canUserApproveNode(user, cashRecord.getCurrentApprovalLevel(), cashRecord.getPrimaryMarketId());
        }

        return false;
    }

    // 检查用户是否可以撤回订单（只有提交人可以在第一个审批节点前撤回）
    public boolean canUserWithdrawOrder(User user, CashRecord cashRecord) {
        if (!cashRecord.isRefundOrder()) {
            return false;
        }

        // 只有订单提交人才能撤回
        boolean isSubmitter = cashRecord.getSubmitterId() != null &&
                cashRecord.getSubmitterId().equals(user.getId());

        return isSubmitter && cashRecord.canWithdraw();
    }

    // 提交退款审批
    public boolean submitRefundApproval(User user, CashRecord cashRecord, String approvalResult, String comments) {
        if (!canUserApproveOrder(user, cashRecord)) {
            log.warn("用户{}没有权限审批退款订单{}", user.getId(), cashRecord.getId());
            return false;
        }

        // 创建审批记录
        RefundApprovalRecord record = new RefundApprovalRecord();
        record.setCashRecordId(cashRecord.getId());
        record.setApprovalLevel(cashRecord.getCurrentApprovalLevel());
        record.setApproverId(user.getId());
        record.setApproverName(user.getName());
        record.setApprovalResult(approvalResult);
        record.setComments(comments);
        record.setApprovalTime(new Date());

        // 更新订单状态
        boolean approved = "APPROVED".equals(approvalResult);
        Integer nextStatus = cashRecord.getNextStatus(approved);
        cashRecord.setStatus(nextStatus);
        cashRecord.setUpdateTime(new Date());
        cashRecord.setAuditId(user.getId());
        cashRecord.setAuditTime(new Date());

        if (!approved) {
            cashRecord.setRejectReason(comments);
        }

        log.info("用户{}审批退款订单{}，结果：{}，新状态：{}",
                user.getName(), cashRecord.getId(), approvalResult, nextStatus);
        return true;
    }

    // 撤回退款订单（在第一个审批节点前）
    public boolean withdrawRefundOrder(User user, CashRecord cashRecord, String withdrawReason) {
        if (!canUserWithdrawOrder(user, cashRecord)) {
            log.warn("用户{}不能撤回退款订单{}", user.getId(), cashRecord.getId());
            return false;
        }

        // 创建撤回记录
        RefundApprovalRecord record = new RefundApprovalRecord();
        record.setCashRecordId(cashRecord.getId());
        record.setApprovalLevel(cashRecord.getCurrentApprovalLevel());
        record.setApproverId(user.getId());
        record.setApproverName(user.getName());
        record.setIsWithdrawal(true);
        record.setWithdrawnBy(user.getId());
        record.setWithdrawReason(withdrawReason);
        record.setWithdrawTime(new Date());

        // 更新订单状态为撤回
        boolean success = cashRecord.withdraw();
        if (success) {
            cashRecord.setUpdateTime(new Date());
            log.info("用户{}撤回退款订单{}，原因：{}", user.getName(), cashRecord.getId(), withdrawReason);
        }

        return success;
    }

    // 重新提交撤回的退款订单
    public boolean resubmitRefundOrder(User user, CashRecord cashRecord) {
        if (!cashRecord.canResubmit()) {
            log.warn("退款订单{}不能重新提交", cashRecord.getId());
            return false;
        }

        // 检查用户是否是原提交人
        boolean isSubmitter = cashRecord.getSubmitterId() != null &&
                cashRecord.getSubmitterId().equals(user.getId());
        if (!isSubmitter) {
            log.warn("用户{}不是订单{}的提交人，不能重新提交", user.getId(), cashRecord.getId());
            return false;
        }

        boolean success = cashRecord.resubmit();
        if (success) {
            cashRecord.setUpdateTime(new Date());
            log.info("用户{}重新提交退款订单{}", user.getName(), cashRecord.getId());
        }

        return success;
    }

    // 获取下一个审批节点信息
    public RefundApprovalNode getNextApprovalNode(CashRecord cashRecord) {
        RefundApprovalFlowConfig flowConfig = getSuitableFlowConfig(cashRecord);
        if (flowConfig != null) {
            return flowConfig.getNextNode(cashRecord.getCurrentApprovalLevel());
        }
        return null;
    }

    // 动态添加退款审批流程配置
    public void addRefundFlowConfig(String marketId, RefundApprovalFlowConfig flowConfig) {
        REFUND_APPROVAL_FLOW_CONFIG.put(marketId, flowConfig);
        log.info("成功添加地区{}的退款审批流程配置：{}", marketId, flowConfig.getFlowName());
    }

    // 获取所有退款审批流程配置
    public Map<String, RefundApprovalFlowConfig> getAllRefundFlowConfigs() {
        return new HashMap<>(REFUND_APPROVAL_FLOW_CONFIG);
    }

    // 根据地区名称初始化审批流程配置
    public void initializeFlowForMarketName(String marketName) {
        Market market = marketService.getMarketByName(marketName);
        if (market != null) {
            List<RefundApprovalNode> flowNodes = createRefundFlowForMarket(market);
            REFUND_APPROVAL_FLOW_CONFIG.put(market.getId().toString(),
                    new RefundApprovalFlowConfig(market.getName() + "退款审批流程", flowNodes));
            log.info("为地区{}初始化退款审批流程配置", marketName);
        }
    }
}