package organize

import (
	"context"
	"fmt"
	"git.nobla.cn/golang/moto/common/db"
	"git.nobla.cn/golang/moto/models"
	"git.nobla.cn/golang/rest/types"
	"gorm.io/gorm"
	"strings"
)

func RecursiveDepartment(ctx context.Context, parent string, level int, departments []*models.Department) []*types.TypeValue {
	var (
		child []*types.TypeValue
	)
	values := make([]*types.TypeValue, 0)
	for _, dept := range departments {
		if dept.Parent == parent {
			values = append(values, &types.TypeValue{
				Label: "|-" + strings.Repeat("--", level) + dept.Name,
				Value: dept.ID,
			})
			child = RecursiveDepartment(ctx, dept.ID, level+1, departments)
			if len(child) > 0 {
				for _, row := range child {
					values = append(values, row)
				}
			}
		}
	}
	return values
}

func RecursiveNestedDepartment(ctx context.Context, parent string, level int, departments []*models.Department) []*types.NestedValue {
	values := make([]*types.NestedValue, 0)
	for _, dept := range departments {
		if dept.Parent == parent {
			v := &types.NestedValue{
				Label:    dept.Name,
				Value:    dept.ID,
				Children: RecursiveNestedDepartment(ctx, dept.ID, level+1, departments),
			}
			values = append(values, v)
		}
	}
	return values
}

func DepartmentUserNested(ctx context.Context, domainName string) []*types.NestedValue {
	var (
		err         error
		value       any
		users       []*models.User
		departments []*models.Department
	)

	if value, err = db.TryCache(ctx, fmt.Sprintf("domain:%s:departments", domainName), func(tx *gorm.DB) (any, error) {
		departments = make([]*models.Department, 0)
		err = tx.Where("domain=?", domainName).Order("created_at ASC").Find(&departments).Error
		return departments, err
	}, db.WithDepend("SELECT max(`updated_at`) FROM `departments` WHERE `domain`=?", domainName)); err == nil {
		departments = value.([]*models.Department)
	} else {
		return nil
	}

	if value, err = db.TryCache(ctx, fmt.Sprintf("domain:%s:users", domainName), func(tx *gorm.DB) (any, error) {
		users = make([]*models.User, 0)
		err = tx.Where("domain=?", domainName).Order("uid ASC").Find(&users).Error
		return users, err
	}, db.WithDepend("SELECT max(`updated_at`) FROM `users` WHERE `domain`=?", domainName)); err == nil {
		users = value.([]*models.User)
	} else {
		return nil
	}

	depts := RecursiveDepartment(ctx, "", 0, departments)
	values := make([]*types.NestedValue, 0)
	for _, dept := range depts {
		v := &types.NestedValue{
			Label:    dept.Label,
			Value:    dept.Value,
			Children: make([]*types.NestedValue, 0),
		}
		for _, user := range users {
			if user.Department == v.Value {
				v.Children = append(v.Children, &types.NestedValue{
					Label: fmt.Sprintf("%s(%s)", user.Username, user.UID),
					Value: user.UID,
				})
			}
		}
		values = append(values, v)
	}
	return values
}

func DepartmentTypes(ctx context.Context, domainName string) []*types.TypeValue {
	result, err := db.TryCache(ctx, fmt.Sprintf("domain:%s:department:types", domainName), func(tx *gorm.DB) (any, error) {
		values := make([]*models.Department, 0)
		if err := db.WithContext(ctx).Where("domain=?", domainName).Find(&values).Error; err == nil {
			return RecursiveDepartment(ctx, "", 0, values), nil
		} else {
			return nil, err
		}
	}, db.WithDepend("SELECT max(`updated_at`) FROM `departments` WHERE `domain`=?", domainName))
	if err == nil {
		return result.([]*types.TypeValue)
	}
	return nil
}