package integral_manager

import (
	"context"
	"github.com/zeromicro/go-zero/core/logx"
	"gorm.io/gorm"
	"live-service/app/user_center/model"
	"live-service/app/user_center/rpc/internal/common/reward_pool"
	"live-service/app/user_center/rpc/pb"
	"live-service/common/nerr"
)

type (
	Manager struct {
		cfg               Config // 配置
		userIntegralModel model.UserIntegralModel
		rewardPoolManager *reward_pool.PoolManager

		logx.Logger
	}
	Config struct {
		GiftRatio float64
	}
	ChangeIntegralReq struct {
		BattleId int64           // 战局ID
		UserId   int64           // 用户ID
		Change   int64           // 变化量(负数为减扣)
		Type     pb.IntegralType // 积分类型
	}
	ChangeIntegralResp struct {
		BattleId int64 // 战局ID
		UserId   int64 // 用户ID
		Change   int64 // 变化量(负数为减扣)
		Integral int64 // 剩余积分
	}
)

func NewIntegralManager(userIntegralModel model.UserIntegralModel, rewardPoolManager *reward_pool.PoolManager) *Manager {
	return &Manager{
		userIntegralModel: userIntegralModel,
		rewardPoolManager: rewardPoolManager,
		Logger:            logx.WithContext(context.Background()),
	}
}

func (m *Manager) GetUserIntegral(ctx context.Context, userId int64) (int64, error) {
	resp, err := m.userIntegralModel.FindOne(ctx, nil, userId)
	if err != nil {
		return 0, err
	}
	return resp.Integral, err
}

func (m *Manager) TransferIntegral(ctx context.Context, req *pb.TransferUserIntegralReq) *pb.TransferUserIntegralResp {
	resp := &pb.TransferUserIntegralResp{
		UserId:       req.UserId,
		TargetUserId: req.TargetUserId,
	}
	if err := m.userIntegralModel.TransactCtx(ctx, nil, func(tx *gorm.DB) error {
		if req.UserId == 0 {
			return nerr.NewError(nerr.RequestParamError, "源用户ID为空")
		}
		if req.TargetUserId == 0 {
			return nerr.NewError(nerr.RequestParamError, "目标用户ID为空")
		}
		integral, err := m.userIntegralModel.ChangeIntegral(ctx, tx, req.UserId, -req.Transfer)
		if err != nil {
			return err
		}
		targetIntegral, err := m.userIntegralModel.ChangeIntegral(ctx, tx, req.TargetUserId, req.Transfer)
		if err != nil {
			return err
		}
		resp.Code = int32(nerr.OK)
		resp.Msg = "转移成功"
		resp.UserIntegral = integral
		resp.TargetUserIntegral = targetIntegral
		return nil
	}); err != nil {
		if e, ok := err.(*nerr.Error); ok {
			resp.Code = int32(e.Code)
			resp.Msg = e.Msg
		} else {
			resp.Code = int32(nerr.ServerCommonError)
			resp.Msg = "转移失败，未知原因"
		}
	}
	return resp
}

func (m *Manager) ChangeIntegral(ctx context.Context, req *ChangeIntegralReq, rewardPool bool) (*ChangeIntegralResp, error) {
	integral, err := m.userIntegralModel.ChangeIntegral(ctx, nil, req.UserId, req.Change)
	if err != nil {
		return nil, err
	}
	if req.BattleId != 0 && rewardPool {
		m.rewardPoolManager.Pool(req.BattleId).Add(req.UserId, req.Change, req.Type)
	}
	return &ChangeIntegralResp{
		UserId:   req.UserId,
		Change:   req.Change,
		Integral: integral,
	}, nil
}

func (m *Manager) ChangeIntegralBatch(ctx context.Context, req []ChangeIntegralReq, rewardPool bool) (map[int64]ChangeIntegralResp, error) {
	resp := make(map[int64]ChangeIntegralResp)
	if err := m.userIntegralModel.TransactCtx(ctx, nil, func(tx *gorm.DB) error {
		for _, item := range req {
			integral, err := m.userIntegralModel.ChangeIntegral(ctx, tx, item.UserId, item.Change)
			if err != nil {
				return err
			}
			resp[item.UserId] = ChangeIntegralResp{
				BattleId: item.BattleId,
				UserId:   item.UserId,
				Change:   item.Change,
				Integral: integral,
			}
		}
		return nil
	}); err != nil {
		return resp, err
	}
	// 奖池
	for _, item := range req {
		if item.BattleId != 0 && rewardPool {
			m.rewardPoolManager.Pool(item.BattleId).Add(item.UserId, item.Change, item.Type)
		}
	}
	return resp, nil
}