import {OsmObject} from "../OsmObject"
import OsmChangeAction from "./OsmChangeAction"
import {Changes} from "../Changes"
import {ChangeDescription} from "./ChangeDescription"
import ChangeTagAction from "./ChangeTagAction"
import {TagsFilter} from "../../Tags/TagsFilter"
import {And} from "../../Tags/And"
import {Tag} from "../../Tags/Tag"
import {Utils} from "../../../Utils";

export default class DeleteAction extends OsmChangeAction {
    private readonly _softDeletionTags: TagsFilter
    private readonly meta: {
        theme: string
        specialMotivation: string
        changeType: "deletion"
    }
    private readonly _id: string
    private _hardDelete: boolean

    constructor(
        id: string,
        softDeletionTags: TagsFilter,
        meta: {
            theme: string
            specialMotivation: string
        },
        hardDelete: boolean
    ) {
        super(id, true)
        this._id = id
        this._hardDelete = hardDelete
        this.meta = {...meta, changeType: "deletion"}
        if (softDeletionTags?.usedKeys()?.indexOf("fixme") >= 0) {
            this._softDeletionTags = softDeletionTags
        } else {
            this._softDeletionTags = new And(Utils.NoNull([
                softDeletionTags,
                new Tag(
                    "fixme",
                    `A mapcomplete user marked this feature to be deleted (${meta.specialMotivation})`
                ),
            ]))
        }
    }

    public async CreateChangeDescriptions(changes: Changes): Promise<ChangeDescription[]> {
        const osmObject = await OsmObject.DownloadObjectAsync(this._id)

        if (this._hardDelete) {
            return [
                {
                    meta: this.meta,
                    doDelete: true,
                    type: osmObject.type,
                    id: osmObject.id,
                },
            ]
        } else {
            return await new ChangeTagAction(this._id, this._softDeletionTags, osmObject.tags, {
                ...this.meta,
                changeType: "soft-delete",
            }).CreateChangeDescriptions(changes)
        }
    }
}