package cc.mrbird.febs.mall.service.impl;

import cc.mrbird.febs.common.enumerates.FlowTypeEnum;
import cc.mrbird.febs.common.enumerates.MoneyFlowTypeEnum;
import cc.mrbird.febs.common.exception.FebsException;
import cc.mrbird.febs.common.utils.LoginUserUtil;
import cc.mrbird.febs.mall.dto.CommissionChangeDto;
import cc.mrbird.febs.mall.entity.MallMember;
import cc.mrbird.febs.mall.entity.MallMemberWallet;
import cc.mrbird.febs.mall.mapper.MallMemberWalletMapper;
import cc.mrbird.febs.mall.service.IApiMallMemberService;
import cc.mrbird.febs.mall.service.IApiMallMemberWalletService;
import cc.mrbird.febs.mall.service.IMallMoneyFlowService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.lang.reflect.Field;
import java.math.BigDecimal;

/**
 * @author wzy
 * @date 2021-09-22
 **/
@Slf4j
@Service
@RequiredArgsConstructor
public class ApiMallMemberWalletServiceImpl extends ServiceImpl<MallMemberWalletMapper, MallMemberWallet> implements IApiMallMemberWalletService {

    private final IMallMoneyFlowService moneyFlowService;

    @Override
    public void addBalance(BigDecimal amount, Long memberId) {
        int i = 0;
        boolean flag = true;

        while (flag) {
            i++;
            MallMemberWallet wallet = this.baseMapper.selectWalletByMemberId(memberId);
            wallet.setBalance(wallet.getBalance().add(amount));

            int result = this.baseMapper.updateBalanceWithVersion(wallet);
            if (result > 0) {
                flag = false;
            } else {
                if (i > 2) {
                    throw new FebsException("余额增加失败");
                }
            }
        }
    }

    @Override
    public void reduceBalance(BigDecimal amount, Long memberId) {
        int i = 0;
        boolean flag = true;

        while (flag) {
            i++;
            MallMemberWallet wallet = this.baseMapper.selectWalletByMemberId(memberId);
            if (amount.compareTo(wallet.getBalance()) > 0) {
                throw new FebsException("余额不足");
            }

            wallet.setBalance(wallet.getBalance().subtract(amount));

            int result = this.baseMapper.updateBalanceWithVersion(wallet);
            if (result > 0) {
                flag = false;
            } else {
                if (i > 2) {
                    throw new FebsException("余额支付失败");
                }
            }
        }
    }

    @Override
    public void addCommission(BigDecimal amount, Long memberId) {
        int i = 0;
        boolean flag = true;

        while (flag) {
            i++;
            MallMemberWallet wallet = this.baseMapper.selectWalletByMemberId(memberId);
            wallet.setCommission(wallet.getCommission().add(amount));

            int result = this.baseMapper.updateCommissionWithVersion(wallet);
            if (result > 0) {
                flag = false;
            } else {
                if (i > 2) {
                    throw new FebsException("余额增加失败");
                }
            }
        }
    }

    public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
        Field commission = MallMemberWallet.class.getDeclaredField("commission");
        MallMemberWallet wallet = new MallMemberWallet();
        commission.setAccessible(true);
        commission.set(wallet, BigDecimal.valueOf(12.34d));

        System.out.println(1);
    }

    @Override
    public void reduceCommission(BigDecimal amount, Long memberId) {
        int i = 0;
        boolean flag = true;

        while (flag) {
            i++;
            MallMemberWallet wallet = this.baseMapper.selectWalletByMemberId(memberId);
            if (amount.compareTo(wallet.getCommission()) > 0) {
                throw new FebsException("佣金不足");
            }

            wallet.setCommission(wallet.getCommission().subtract(amount));

            int result = this.baseMapper.updateCommissionWithVersion(wallet);
            if (result > 0) {
                flag = false;
            } else {
                if (i > 2) {
                    throw new FebsException("佣金支付失败");
                }
            }
        }
    }

    @Override
    public void add(BigDecimal amount, Long memberId, String field) {
        int i = 0;
        boolean flag = true;

        while (flag) {
            i++;
            MallMemberWallet wallet = this.baseMapper.selectWalletByMemberId(memberId);

            MallMemberWallet update = new MallMemberWallet();
            update.setId(wallet.getId());
            update.setRevision(wallet.getRevision());

            Field declaredField = null;
            try {
                declaredField = MallMemberWallet.class.getDeclaredField(field);
                declaredField.setAccessible(true);

                BigDecimal balance = (BigDecimal) declaredField.get(wallet);
                declaredField.set(update, balance.add(amount));
            } catch (NoSuchFieldException | IllegalAccessException e) {
                e.printStackTrace();
                throw new FebsException("金额新增失败");
            }

            int result = this.baseMapper.updateAmountWithVersion(update);
            if (result > 0) {
                flag = false;
            } else {
                if (i > 2) {
                    throw new FebsException("金额新增失败");
                }
            }
        }
    }

    @Override
    public void add(BigDecimal amount, Long memberId, String... field) {
        String[] fields = field.clone();
        for (String s : fields) {
            add(amount, memberId, s);
        }
    }

    @Override
    public void reduce(BigDecimal amount, Long memberId, String field) {
        int i = 0;
        boolean flag = true;

        while (flag) {
            i++;
            MallMemberWallet wallet = this.baseMapper.selectWalletByMemberId(memberId);

            MallMemberWallet update = new MallMemberWallet();
            update.setId(wallet.getId());
            update.setRevision(wallet.getRevision());

            try {
                Field declaredField = MallMemberWallet.class.getDeclaredField(field);
                declaredField.setAccessible(true);
                BigDecimal balance = (BigDecimal) declaredField.get(wallet);

                if (amount.compareTo(balance) > 0) {
                    throw new FebsException("余额不足");
                }
                declaredField.set(update, balance.subtract(amount));

            } catch (NoSuchFieldException | IllegalAccessException e) {
                e.printStackTrace();
            }

            int result = this.baseMapper.updateAmountWithVersion(update);
            if (result > 0) {
                flag = false;
            } else {
                if (i > 2) {
                    throw new FebsException("余额修改失败");
                }
            }
        }
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void commissionChange(CommissionChangeDto commissionChange) {
        MallMember member = LoginUserUtil.getLoginUser();

        // TODO 判断是否开启了划转

        int type;
        int flowType;
        this.reduce(commissionChange.getAmount(), member.getId(), "commission");

        // 佣金转余额
        if (commissionChange.getType() == 1) {
            type = MoneyFlowTypeEnum.COMMISSION_TO_BALANCE.getValue();
            flowType = FlowTypeEnum.BALANCE.getValue();
            this.add(commissionChange.getAmount(), member.getId(), "balance");

            // 佣金转竞猜积分
        } else if (commissionChange.getType() == 2){
            type = MoneyFlowTypeEnum.COMMISSION_TO_PRIZESCORE.getValue();
            flowType = FlowTypeEnum.PRIZE_SCORE.getValue();
            this.add(commissionChange.getAmount(), member.getId(), "prizeScore");
        } else {
            throw new FebsException("参数错误");
        }

        moneyFlowService.addMoneyFlow(member.getId(), commissionChange.getAmount().negate(), type, null,  FlowTypeEnum.COMMISSION.getValue());
        moneyFlowService.addMoneyFlow(member.getId(), commissionChange.getAmount(), type, null,  flowType);
    }
}