import {SpecialVisualization, SpecialVisualizationState} from "../../SpecialVisualization";
import {AutoAction} from "../AutoApplyButton";
import {Feature, LineString, Polygon} from "geojson";
import {UIEventSource} from "../../../Logic/UIEventSource";
import BaseUIElement from "../../BaseUIElement";
import {ImportFlowUtils} from "./ImportFlow";
import LayerConfig from "../../../Models/ThemeConfig/LayerConfig";
import SvelteUIElement from "../../Base/SvelteUIElement";
import {FixedUiElement} from "../../Base/FixedUiElement";
import WayImportFlow from "./WayImportFlow.svelte";
import WayImportFlowState, {WayImportFlowArguments} from "./WayImportFlowState";
import {Utils} from "../../../Utils";
import LayoutConfig from "../../../Models/ThemeConfig/LayoutConfig";
import {Changes} from "../../../Logic/Osm/Changes";
import {IndexedFeatureSource} from "../../../Logic/FeatureSource/FeatureSource";
import FullNodeDatabaseSource from "../../../Logic/FeatureSource/TiledFeatureSource/FullNodeDatabaseSource";


/**
 * Wrapper around 'WayImportFlow' to make it a special visualisation
 */
export default class WayImportButtonViz implements AutoAction, SpecialVisualization {


    public readonly funcName: string= "import_way_button"
    public readonly docs: string  = "This button will copy the data from an external dataset into OpenStreetMap, copying the geometry and adding it as a 'line'" + ImportFlowUtils.documentationGeneral
    public readonly args: { name: string; defaultValue?: string; doc: string }[]= [
        ...ImportFlowUtils.generalArguments,
        {
            name: "snap_to_point_if",
            doc: "Points with the given tags will be snapped to or moved",
        },
        {
            name: "max_snap_distance",
            doc: "If the imported object is a LineString or (Multi)Polygon, already existing OSM-points will be reused to construct the geometry of the newly imported way",
            defaultValue: "0.05",
        },
        {
            name: "move_osm_point_if",
            doc: "Moves the OSM-point to the newly imported point if these conditions are met",
        },
        {
            name: "max_move_distance",
            doc: "If an OSM-point is moved, the maximum amount of meters it is moved. Capped on 20m",
            defaultValue: "0.05",
        },
        {
            name: "snap_onto_layers",
            doc: "If no existing nearby point exists, but a line of a specified layer is closeby, snap to this layer instead",
        },
        {
            name: "snap_to_layer_max_distance",
            doc: "Distance to distort the geometry to snap to this layer",
            defaultValue: "0.1",
        },
    ]

    public readonly supportsAutoAction = true
    public readonly needsNodeDatabase = true

    constr(state: SpecialVisualizationState, tagSource: UIEventSource<Record<string, string>>, argument: string[], feature: Feature, _: LayerConfig): BaseUIElement {
        const geometry = feature.geometry
        if (!(geometry.type == "LineString" || geometry.type === "Polygon")) {
            console.error("Invalid type to import", geometry.type)
            return new FixedUiElement("Invalid geometry type:" + geometry.type).SetClass("alert")
        }
        const args: WayImportFlowArguments = <any>Utils.ParseVisArgs(this.args, argument)
        const tagsToApply = ImportFlowUtils.getTagsToApply(tagSource, args)
        const importFlow = new WayImportFlowState(state, <Feature<LineString | Polygon>>feature, args, tagsToApply, tagSource)
        return new SvelteUIElement(WayImportFlow, {
            importFlow
        })
    }

    public async applyActionOn(feature: Feature, state: {
        layout: LayoutConfig;
        changes: Changes;
        indexedFeatures: IndexedFeatureSource,
        fullNodeDatabase: FullNodeDatabaseSource
    }, tagSource: UIEventSource<any>, argument: string[]): Promise<void> {
        {
            // Small safety check to prevent duplicate imports
            const id = tagSource.data.id
            if (ImportFlowUtils.importedIds.has(id)) {
                return
            }
            ImportFlowUtils.importedIds.add(id)
        }

        if(feature.geometry.type !== "LineString" && feature.geometry.type !== "Polygon"){
            return
        }

        const args: WayImportFlowArguments = <any>Utils.ParseVisArgs(this.args, argument)
        const tagsToApply = ImportFlowUtils.getTagsToApply(tagSource, args)
        const mergeConfigs = WayImportFlowState.GetMergeConfig(args)
        const action = WayImportFlowState.CreateAction(<Feature<LineString | Polygon >>feature, args, state, tagsToApply, mergeConfigs)
        tagSource.data["_imported"] = "yes"
        tagSource.ping()
        await state.changes.applyAction(action)
    }

    getLayerDependencies(args: string[]){
        return ImportFlowUtils.getLayerDependenciesWithSnapOnto(this.args, args)
    }
}