import { ImageUploader } from "./ImageUploader"
import LinkImageAction from "../Osm/Actions/LinkImageAction"
import FeaturePropertiesStore from "../FeatureSource/Actors/FeaturePropertiesStore"
import { OsmId, OsmTags } from "../../Models/OsmFeature"
import LayoutConfig from "../../Models/ThemeConfig/LayoutConfig"
import { Store, UIEventSource } from "../UIEventSource"
import { OsmConnection } from "../Osm/OsmConnection"
import { Changes } from "../Osm/Changes"
import Translations from "../../UI/i18n/Translations"
import NoteCommentElement from "../../UI/Popup/NoteCommentElement"

/**
 * The ImageUploadManager has a
 */
export class ImageUploadManager {
    private readonly _uploader: ImageUploader
    private readonly _featureProperties: FeaturePropertiesStore
    private readonly _layout: LayoutConfig

    private readonly _uploadStarted: Map<string, UIEventSource<number>> = new Map()
    private readonly _uploadFinished: Map<string, UIEventSource<number>> = new Map()
    private readonly _uploadFailed: Map<string, UIEventSource<number>> = new Map()
    private readonly _uploadRetried: Map<string, UIEventSource<number>> = new Map()
    private readonly _uploadRetriedSuccess: Map<string, UIEventSource<number>> = new Map()
    private readonly _osmConnection: OsmConnection
    private readonly _changes: Changes

    constructor(
        layout: LayoutConfig,
        uploader: ImageUploader,
        featureProperties: FeaturePropertiesStore,
        osmConnection: OsmConnection,
        changes: Changes
    ) {
        this._uploader = uploader
        this._featureProperties = featureProperties
        this._layout = layout
        this._osmConnection = osmConnection
        this._changes = changes
    }

    /**
     * Gets various counters.
     * Note that counters can only increase
     * If a retry was a success, both 'retrySuccess' _and_ 'uploadFinished' will be increased
     * @param featureId: the id of the feature you want information for. '*' has a global counter
     */
    public getCountsFor(featureId: string | "*"): {
        retried: Store<number>
        uploadStarted: Store<number>
        retrySuccess: Store<number>
        failed: Store<number>
        uploadFinished: Store<number>
    } {
        return {
            uploadStarted: this.getCounterFor(this._uploadStarted, featureId),
            uploadFinished: this.getCounterFor(this._uploadFinished, featureId),
            retried: this.getCounterFor(this._uploadRetried, featureId),
            failed: this.getCounterFor(this._uploadFailed, featureId),
            retrySuccess: this.getCounterFor(this._uploadRetriedSuccess, featureId),
        }
    }

    /**
     * Uploads the given image, applies the correct title and license for the known user.
     * Will then add this image to the OSM-feature or the OSM-note
     */
    public async uploadImageAndApply(file: File, tagsStore: UIEventSource<OsmTags>): Promise<void> {
        const sizeInBytes = file.size
        const tags = tagsStore.data
        const featureId = <OsmId>tags.id
        const self = this
        if (sizeInBytes > this._uploader.maxFileSizeInMegabytes * 1000000) {
            this.increaseCountFor(this._uploadStarted, featureId)
            this.increaseCountFor(this._uploadFailed, featureId)
            throw Translations.t.image.toBig.Subs({
                actual_size: Math.floor(sizeInBytes / 1000000) + "MB",
                max_size: self._uploader.maxFileSizeInMegabytes + "MB",
            }).txt
        }

        const licenseStore = this._osmConnection?.GetPreference("pictures-license", "CC0")
        const license = licenseStore?.data ?? "CC0"

        const matchingLayer = this._layout?.getMatchingLayer(tags)

        const title =
            matchingLayer?.title?.GetRenderValue(tags)?.Subs(tags)?.textFor("en") ??
            tags.name ??
            "https//osm.org/" + tags.id
        const description = [
            "author:" + this._osmConnection.userDetails.data.name,
            "license:" + license,
            "osmid:" + tags.id,
        ].join("\n")

        console.log("Upload done, creating ")
        const action = await this.uploadImageWithLicense(featureId, title, description, file)
        if (!isNaN(Number(featureId))) {
            // This is a map note
            const url = action._url
            await this._osmConnection.addCommentToNote(featureId, url)
            NoteCommentElement.addCommentTo(url, <UIEventSource<any>>tagsStore, {
                osmConnection: this._osmConnection,
            })
            return
        }
        await this._changes.applyAction(action)
    }

    private async uploadImageWithLicense(
        featureId: OsmId,
        title: string,
        description: string,
        blob: File
    ): Promise<LinkImageAction> {
        this.increaseCountFor(this._uploadStarted, featureId)
        const properties = this._featureProperties.getStore(featureId)
        let key: string
        let value: string
        try {
            ;({ key, value } = await this._uploader.uploadImage(title, description, blob))
        } catch (e) {
            this.increaseCountFor(this._uploadRetried, featureId)
            console.error("Could not upload image, trying again:", e)
            try {
                ;({ key, value } = await this._uploader.uploadImage(title, description, blob))
                this.increaseCountFor(this._uploadRetriedSuccess, featureId)
            } catch (e) {
                console.error("Could again not upload image due to", e)
                this.increaseCountFor(this._uploadFailed, featureId)
            }
        }
        console.log("Uploading done, creating action for", featureId)
        const action = new LinkImageAction(featureId, key, value, properties, {
            theme: this._layout.id,
            changeType: "add-image",
        })
        this.increaseCountFor(this._uploadFinished, featureId)
        return action
    }

    private getCounterFor(collection: Map<string, UIEventSource<number>>, key: string | "*") {
        if (this._featureProperties.aliases.has(key)) {
            key = this._featureProperties.aliases.get(key)
        }
        if (!collection.has(key)) {
            collection.set(key, new UIEventSource<number>(0))
        }
        return collection.get(key)
    }

    private increaseCountFor(collection: Map<string, UIEventSource<number>>, key: string | "*") {
        {
            const counter = this.getCounterFor(collection, key)
            counter.setData(counter.data + 1)
        }
        {
            const global = this.getCounterFor(collection, "*")
            global.setData(global.data + 1)
        }
    }
}