package cardpackage

import (
	"context"
	"sort"
	"strings"

	"git.5iot.com/iotlcm-public/iotlcm-admin-svr/internal/consts"
	"git.5iot.com/iotlcm-public/iotlcm-admin-svr/internal/dao"
	"git.5iot.com/iotlcm-public/iotlcm-admin-svr/internal/model/do"
	"git.5iot.com/iotlcm-public/iotlcm-admin-svr/internal/model/entity"

	"github.com/gogf/gf/v2/database/gdb"
	"github.com/gogf/gf/v2/errors/gerror"
)

const cardPackageBindInsertBatchSize = 500

type Repository struct{}

func NewRepository() *Repository {
	return &Repository{}
}

func (r *Repository) LockCardsByIccids(ctx context.Context, tx gdb.TX, iccids []string) (map[string]*entity.TSimCardInfo, error) {
	result := make(map[string]*entity.TSimCardInfo)
	uniqueIccids := uniqueStrings(iccids)
	if len(uniqueIccids) == 0 {
		return result, nil
	}

	var list []*entity.TSimCardInfo
	if err := tx.Ctx(ctx).Model(dao.TSimCardInfo.Table()).
		WhereIn(dao.TSimCardInfo.Columns().Iccid, uniqueIccids).
		LockUpdate().
		Scan(&list); err != nil {
		return nil, err
	}
	for _, item := range list {
		if item != nil && item.Iccid != "" {
			result[item.Iccid] = item
		}
	}
	return result, nil
}

func (r *Repository) LockCurrentActiveBindsByIccids(ctx context.Context, tx gdb.TX, iccids []string) (map[string]*entity.TSimCardBindPkg, error) {
	result := make(map[string]*entity.TSimCardBindPkg)
	priorities := make(map[string]int)
	uniqueIccids := uniqueStrings(iccids)
	if len(uniqueIccids) == 0 {
		return result, nil
	}

	var list []*entity.TSimCardBindPkg
	if err := tx.Ctx(ctx).Model(dao.TSimCardBindPkg.Table()).
		WhereIn(dao.TSimCardBindPkg.Columns().Iccid, uniqueIccids).
		WhereIn(dao.TSimCardBindPkg.Columns().EffectiveStatus, []int{consts.EffectiveStatusPending, consts.EffectiveStatusEffective}).
		OrderDesc(dao.TSimCardBindPkg.Columns().EffectiveStatus).
		OrderAsc(dao.TSimCardBindPkg.Columns().EffectiveTime).
		OrderAsc(dao.TSimCardBindPkg.Columns().Id).
		LockUpdate().
		Scan(&list); err != nil {
		return nil, err
	}
	for _, item := range list {
		if item == nil || item.Iccid == "" {
			continue
		}
		priority := bindPriority(item.EffectiveStatus)
		currentPriority, exists := priorities[item.Iccid]
		if exists && priority < currentPriority {
			continue
		}
		if exists && priority == currentPriority {
			result[item.Iccid] = nil
			continue
		}
		priorities[item.Iccid] = priority
		result[item.Iccid] = item
	}
	return result, nil
}

func (r *Repository) LockLatestBindsByIccids(ctx context.Context, tx gdb.TX, iccids []string) (map[string]*entity.TSimCardBindPkg, error) {
	result := make(map[string]*entity.TSimCardBindPkg)
	uniqueIccids := uniqueStrings(iccids)
	if len(uniqueIccids) == 0 {
		return result, nil
	}

	var list []*entity.TSimCardBindPkg
	if err := tx.Ctx(ctx).Model(dao.TSimCardBindPkg.Table()).
		WhereIn(dao.TSimCardBindPkg.Columns().Iccid, uniqueIccids).
		WhereIn(dao.TSimCardBindPkg.Columns().PackageType, []int{101, 102}).
		WhereIn(dao.TSimCardBindPkg.Columns().EffectiveStatus, []int{
			consts.EffectiveStatusPending,
			consts.EffectiveStatusEffective,
			consts.EffectiveStatusExpired,
		}).
		OrderDesc(dao.TSimCardBindPkg.Columns().ExpectedExpireTime).
		OrderDesc(dao.TSimCardBindPkg.Columns().Id).
		LockUpdate().
		Scan(&list); err != nil {
		return nil, err
	}
	effectiveCount := make(map[string]int)
	for _, item := range list {
		if item == nil || item.Iccid == "" {
			continue
		}
		iccid := strings.TrimSpace(item.Iccid)
		if item.EffectiveStatus == consts.EffectiveStatusEffective {
			effectiveCount[iccid]++
			if effectiveCount[iccid] > 1 {
				return nil, gerror.Newf("同一张卡存在多个生效中的套餐订购记录：%s", iccid)
			}
		}
		if _, exists := result[iccid]; exists {
			continue
		}
		result[iccid] = item
	}
	return result, nil
}

func (r *Repository) ActiveBindCountsByOrderCodes(ctx context.Context, tx gdb.TX, orderCodes []string) (map[string]int, error) {
	result := make(map[string]int)
	uniqueOrderCodes := uniqueStrings(orderCodes)
	if len(uniqueOrderCodes) == 0 {
		return result, nil
	}

	var list []struct {
		OrderCode string `orm:"order_code"`
		Count     int    `orm:"count"`
	}
	err := tx.Ctx(ctx).Model(dao.TSimCardBindPkg.Table()).
		Fields(dao.TSimCardBindPkg.Columns().OrderCode, "COUNT(1) AS count").
		WhereIn(dao.TSimCardBindPkg.Columns().OrderCode, uniqueOrderCodes).
		Group(dao.TSimCardBindPkg.Columns().OrderCode).
		Scan(&list)
	if err != nil {
		return nil, err
	}
	for _, item := range list {
		result[item.OrderCode] = item.Count
	}
	return result, nil
}

func (r *Repository) LoadTargetDept(ctx context.Context, tx gdb.TX, deptId int64, tenantId string) (*entity.SysDept, error) {
	var customer *entity.SysDept
	mod := tx.Ctx(ctx).Model(dao.SysDept.Table()).
		Where(dao.SysDept.Columns().DeptId, deptId)
	if tenantId != "" {
		mod = mod.Where(dao.SysDept.Columns().TenantId, tenantId)
	}
	if err := mod.Scan(&customer); err != nil {
		return nil, err
	}
	return customer, nil
}

func (r *Repository) LoadPackage(ctx context.Context, tx gdb.TX, packageCode string) (*entity.TSimFlowPackageInfo, error) {
	var pkg *entity.TSimFlowPackageInfo
	err := tx.Ctx(ctx).Model(dao.TSimFlowPackageInfo.Table()).
		Where(dao.TSimFlowPackageInfo.Columns().PackageCode, strings.TrimSpace(packageCode)).
		Scan(&pkg)
	if err != nil {
		return nil, err
	}
	return pkg, nil
}

func (r *Repository) InsertOrder(ctx context.Context, tx gdb.TX, data do.TOrder) (int64, error) {
	return tx.Ctx(ctx).Model(dao.TOrder.Table()).Data(data).InsertAndGetId()
}

func (r *Repository) InsertOrderItem(ctx context.Context, tx gdb.TX, data do.TOrderItem) error {
	_, err := tx.Ctx(ctx).Model(dao.TOrderItem.Table()).Data(data).Insert()
	return err
}

func (r *Repository) InsertCardPackageBinds(ctx context.Context, tx gdb.TX, rows []do.TSimCardBindPkg) error {
	if len(rows) == 0 {
		return nil
	}
	for start := 0; start < len(rows); start += cardPackageBindInsertBatchSize {
		end := start + cardPackageBindInsertBatchSize
		if end > len(rows) {
			end = len(rows)
		}
		if _, err := tx.Ctx(ctx).Model(dao.TSimCardBindPkg.Table()).Data(rows[start:end]).Insert(); err != nil {
			return err
		}
	}
	return nil
}

func (r *Repository) DeleteBindsBySubscriptionNos(ctx context.Context, tx gdb.TX, subscriptionNos []string) (int64, error) {
	uniqueNos := uniqueStrings(subscriptionNos)
	if len(uniqueNos) == 0 {
		return 0, nil
	}
	result, err := tx.Ctx(ctx).Model(dao.TSimCardBindPkg.Table()).
		WhereIn(dao.TSimCardBindPkg.Columns().SubscriptionNo, uniqueNos).
		Delete()
	if err != nil {
		return 0, err
	}
	return result.RowsAffected()
}

func uniqueStrings(list []string) []string {
	if len(list) == 0 {
		return nil
	}
	seen := make(map[string]struct{}, len(list))
	result := make([]string, 0, len(list))
	for _, item := range list {
		item = strings.TrimSpace(item)
		if item == "" {
			continue
		}
		if _, ok := seen[item]; ok {
			continue
		}
		seen[item] = struct{}{}
		result = append(result, item)
	}
	sort.Strings(result)
	return result
}

func bindPriority(status int) int {
	switch status {
	case consts.EffectiveStatusEffective:
		return 2
	case consts.EffectiveStatusPending:
		return 1
	default:
		return 0
	}
}