package biz

import (
	"context"
	"time"

	"gitlab.guxuan.icu/jinshan_community/internal/mods/activity/dal"
	"gitlab.guxuan.icu/jinshan_community/internal/mods/activity/schema"
	"gitlab.guxuan.icu/jinshan_community/pkg/errors"
	"gitlab.guxuan.icu/jinshan_community/pkg/util"
)

// Defining the `ActivityCategory` business logic.
type ActivityCategory struct {
	Trans               *util.Trans
	ActivityCategoryDAL *dal.ActivityCategory
}

// Query activity categories from the data access object based on the provided parameters and options.
func (a *ActivityCategory) Query(ctx context.Context, params schema.ActivityCategoryQueryParam) (*schema.ActivityCategoryQueryResult, error) {
	params.Pagination = true

	result, err := a.ActivityCategoryDAL.Query(ctx, params, schema.ActivityCategoryQueryOptions{
		QueryOptions: util.QueryOptions{
			OrderFields: []util.OrderByParam{
				{Field: "created_at", Direction: util.DESC},
			},
		},
	})
	if err != nil {
		return nil, err
	}
	return result, nil
}

// Get the specified activity category from the data access object.
func (a *ActivityCategory) Get(ctx context.Context, id string) (*schema.ActivityCategory, error) {
	activityCategory, err := a.ActivityCategoryDAL.Get(ctx, id)
	if err != nil {
		return nil, err
	} else if activityCategory == nil {
		return nil, errors.NotFound("", "Activity category not found")
	}
	return activityCategory, nil
}

// Create a new activity category in the data access object.
func (a *ActivityCategory) Create(ctx context.Context, formItem *schema.ActivityCategoryForm) (*schema.ActivityCategory, error) {
	activityCategory := &schema.ActivityCategory{}

	if err := formItem.FillTo(activityCategory); err != nil {
		return nil, err
	}

	err := a.Trans.Exec(ctx, func(ctx context.Context) error {
		if err := a.ActivityCategoryDAL.Create(ctx, activityCategory); err != nil {
			return err
		}
		return nil
	})
	if err != nil {
		return nil, err
	}
	return activityCategory, nil
}

// Update the specified activity category in the data access object.
func (a *ActivityCategory) Update(ctx context.Context, id string, formItem *schema.ActivityCategoryForm) error {
	activityCategory, err := a.ActivityCategoryDAL.Get(ctx, id)
	if err != nil {
		return err
	} else if activityCategory == nil {
		return errors.NotFound("", "Activity category not found")
	}

	if err := formItem.FillTo(activityCategory); err != nil {
		return err
	}
	activityCategory.UpdatedAt = time.Now()

	return a.Trans.Exec(ctx, func(ctx context.Context) error {
		if err := a.ActivityCategoryDAL.Update(ctx, activityCategory); err != nil {
			return err
		}
		return nil
	})
}

// Delete the specified activity category from the data access object.
func (a *ActivityCategory) Delete(ctx context.Context, id string) error {
	exists, err := a.ActivityCategoryDAL.Exists(ctx, id)
	if err != nil {
		return err
	} else if !exists {
		return errors.NotFound("", "Activity category not found")
	}

	return a.Trans.Exec(ctx, func(ctx context.Context) error {
		if err := a.ActivityCategoryDAL.Delete(ctx, id); err != nil {
			return err
		}
		return nil
	})
}