package biz

import (
	"context"
	"time"

	"github.guxuan/haibei/internal/mods/common/dal"
	"github.guxuan/haibei/internal/mods/common/schema"
	"github.guxuan/haibei/pkg/errors"
	"github.guxuan/haibei/pkg/util"
)

// Defining the `Notice` business logic.
type Notice struct {
	Trans     *util.Trans
	NoticeDAL *dal.Notice
}

// Query notices from the data access object based on the provided parameters and options.
func (a *Notice) Query(ctx context.Context, params schema.NoticeQueryParam) (*schema.NoticeQueryResult, error) {
	params.Pagination = true

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

// Get the specified notice from the data access object.
func (a *Notice) Get(ctx context.Context, id uint) (*schema.Notice, error) {
	notice, err := a.NoticeDAL.Get(ctx, id)
	if err != nil {
		return nil, err
	} else if notice == nil {
		return nil, errors.NotFound("", "Notice not found")
	}
	return notice, nil
}

// Create a new notice in the data access object.
func (a *Notice) Create(ctx context.Context, formItem *schema.NoticeForm) (*schema.Notice, error) {
	notice := &schema.Notice{}

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

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

// Update the specified notice in the data access object.
func (a *Notice) Update(ctx context.Context, id uint, formItem *schema.NoticeForm) error {
	notice, err := a.NoticeDAL.Get(ctx, id)
	if err != nil {
		return err
	} else if notice == nil {
		return errors.NotFound("", "Notice not found")
	}

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

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

// Delete the specified notice from the data access object.
func (a *Notice) Delete(ctx context.Context, id uint) error {
	exists, err := a.NoticeDAL.Exists(ctx, id)
	if err != nil {
		return err
	} else if !exists {
		return errors.NotFound("", "Notice not found")
	}

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