package period_profit

import (
	"app/commons/core"
	"app/commons/model/entity"
	"app/commons/services"
	"app/commons/utils"
	"errors"
	"fmt"
	"github.com/shopspring/decimal"
	"gorm.io/gorm"
)

type Service struct {
	//job *entity.SysJob
	services.CommonService
}

func NewService() *Service {
	return &Service{}
}

// 期任务
// nextPeriod 是否下一期

func (s *Service) RunPeriodProfit(nextPeriod bool) error {
	var err error
	// 期任务预创建
	if err = s.PreCreationPeriods(); err != nil {
		return err
	}
	// 获取最近一期 运行中或完成任务
	nextPeriodJob, err := s.getNextRunPeriodJob()
	if err != nil {
		return err
	}
	nowPeriodNo := utils.NowPeriodNo()
	// 正常运行当期任务  / 当前开启 nextPeriod 无视时间 运行下一期
	if nextPeriodJob.PeriodNo == nowPeriodNo || nextPeriod {
		if err = s.DB().Model(&entity.StakePeriodJob{}).
			Where("id", nextPeriodJob.Id).
			Update("job_state", entity.PeriodJobStateRunning).Error; err != nil {
			return err
		}

		if err = s.runPeriodTask(nextPeriodJob.PeriodNo); err != nil {
			return err
		}
	}
	err = s.DisProfit()
	if err != nil {
		return err
	}
	return nil
}

func (s *Service) runPeriodTask(periodNo string) error {
	err := s.calCurrentStakeProfit(periodNo)
	if err != nil {
		return err
	}
	err = s.calLevelProfit(periodNo)
	if err != nil {
		return err
	}
	updateStm := s.DB().Model(&entity.StakePeriodJob{}).
		Where("period_no", periodNo).
		Where("job_state", entity.PeriodJobStateRunning).
		Updates(map[string]interface{}{
			"level_profit_is_cal": true,
			"job_state":           entity.PeriodJobStateSuccess,
		})
	if updateStm.RowsAffected != 1 || updateStm.Error != nil {
		core.JobLog.Errorf("update fail RowsAffected:%d err:%+v", updateStm.RowsAffected, updateStm.Error)
		return err
	}
	return nil
}

func (s *Service) getNextRunPeriodJob() (*entity.StakePeriodJob, error) {
	firstWaiting, err := s.FirstStakePeriodJob(s.DB().Where("job_state = ?", entity.PeriodJobStateWaiting))
	if err != nil {
		return nil, err
	}
	runningOrSuccessOrFailRow, err := s.FirstStakePeriodJob(s.DB().Where("job_state != ?", entity.PeriodJobStateWaiting))
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return firstWaiting, nil
		}
		return nil, err
	}
	if runningOrSuccessOrFailRow.JobState == entity.PeriodJobStateSuccess {
		return firstWaiting, nil
	}
	if runningOrSuccessOrFailRow.JobState == entity.PeriodJobStateRunning {
		return nil, fmt.Errorf("存在运行中期任务:%s", runningOrSuccessOrFailRow.PeriodNo)
	}
	if runningOrSuccessOrFailRow.JobState == entity.PeriodJobStateFailure {
		return nil, fmt.Errorf("存在运行错误期任务:%s,必须处理错误后才可以正常运行", runningOrSuccessOrFailRow.PeriodNo)
	}
	return nil, fmt.Errorf("期任务:%s,未知状态错误", runningOrSuccessOrFailRow.PeriodNo)
}

// 预创建3期任务

func (s *Service) PreCreationPeriods() error {
	var err error
	firstPeriodJob, err := s.FirstStakePeriodJob(s.DB().Where("job_state", entity.PeriodJobStateWaiting))
	if err != nil {
		// 当无法占到时创建一条
		if errors.Is(err, gorm.ErrRecordNotFound) {
			firstPeriodJob, err = s.newPeriods(utils.NowPeriodNo())
			if err != nil {
				return err
			}
		} else {
			return err
		}
	}
	lastPeriodJob, err := s.LastStakePeriodJob(s.DB().Where("job_state", entity.PeriodJobStateWaiting))
	if err != nil {
		return err
	}
	// 计算两期时间跨度
	n := utils.CalPeriodNosSpan(firstPeriodJob.PeriodNo, lastPeriodJob.PeriodNo)
	// 保持三期创建
	if n < 3 {
		// 目标期
		targetPeriod, err := utils.JumpToPeriodNo(firstPeriodJob.PeriodNo, 3)
		if err != nil {
			return err
		}
		nowPeriod := lastPeriodJob.PeriodNo
		for {
			nextPeriod, err := utils.NextPeriodNo(nowPeriod)
			if err != nil {
				return err
			}
			if _, err = s.newPeriods(nextPeriod); err != nil {
				return err
			}
			if nextPeriod >= targetPeriod {
				break
			}
			nowPeriod = nextPeriod
		}
	}
	return err
}

// 创建期任务

func (s *Service) newPeriods(periodNo string) (*entity.StakePeriodJob, error) {
	newRow := &entity.StakePeriodJob{
		PeriodNo:           periodNo,
		JobState:           entity.PeriodJobStateWaiting,
		StaticSymbolProfit: decimal.Zero,
		StaticUsdProfit:    decimal.Zero,
		Desc:               "",
	}
	err := s.DB().Create(&newRow).Error
	return newRow, err
}