import { VariableUiElement } from "../Base/VariableUIElement"
import { Translation } from "../i18n/Translation"
import Svg from "../../Svg"
import Combine from "../Base/Combine"
import { Store, UIEventSource } from "../../Logic/UIEventSource"
import { Utils } from "../../Utils"
import Translations from "../i18n/Translations"
import BaseUIElement from "../BaseUIElement"
import LayerConfig from "../../Models/ThemeConfig/LayerConfig"
import LayoutConfig from "../../Models/ThemeConfig/LayoutConfig"
import Loc from "../../Models/Loc"
import BaseLayer from "../../Models/BaseLayer"
import FilteredLayer from "../../Models/FilteredLayer"
import { InputElement } from "../Input/InputElement"
import { CheckBox } from "../Input/Checkboxes"
import { SubtleButton } from "../Base/SubtleButton"
import LZString from "lz-string"

export default class ShareScreen extends Combine {
    constructor(state: {
        layoutToUse: LayoutConfig
        locationControl: UIEventSource<Loc>
        backgroundLayer: UIEventSource<BaseLayer>
        filteredLayers: UIEventSource<FilteredLayer[]>
    }) {
        const layout = state?.layoutToUse
        const tr = Translations.t.general.sharescreen

        const optionCheckboxes: InputElement<boolean>[] = []
        const optionParts: Store<string>[] = []

        const includeLocation = new CheckBox(tr.fsIncludeCurrentLocation, true)
        optionCheckboxes.push(includeLocation)

        const currentLocation = state.locationControl

        optionParts.push(
            includeLocation.GetValue().map(
                (includeL) => {
                    if (currentLocation === undefined) {
                        return null
                    }
                    if (includeL) {
                        return [
                            ["z", currentLocation.data?.zoom],
                            ["lat", currentLocation.data?.lat],
                            ["lon", currentLocation.data?.lon],
                        ]
                            .filter((p) => p[1] !== undefined)
                            .map((p) => p[0] + "=" + p[1])
                            .join("&")
                    } else {
                        return null
                    }
                },
                [currentLocation]
            )
        )

        function fLayerToParam(flayer: {
            isDisplayed: UIEventSource<boolean>
            layerDef: LayerConfig
        }) {
            if (flayer.isDisplayed.data) {
                return null // Being displayed is the default
            }
            return "layer-" + flayer.layerDef.id + "=" + flayer.isDisplayed.data
        }

        const currentLayer: UIEventSource<{ id: string; name: string; layer: any }> =
            state.backgroundLayer
        const currentBackground = new VariableUiElement(
            currentLayer.map((layer) => {
                return tr.fsIncludeCurrentBackgroundMap.Subs({ name: layer?.name ?? "" })
            })
        )
        const includeCurrentBackground = new CheckBox(currentBackground, true)
        optionCheckboxes.push(includeCurrentBackground)
        optionParts.push(
            includeCurrentBackground.GetValue().map(
                (includeBG) => {
                    if (includeBG) {
                        return "background=" + currentLayer.data?.id
                    } else {
                        return null
                    }
                },
                [currentLayer]
            )
        )

        const includeLayerChoices = new CheckBox(tr.fsIncludeCurrentLayers, true)
        optionCheckboxes.push(includeLayerChoices)

        optionParts.push(
            includeLayerChoices.GetValue().map(
                (includeLayerSelection) => {
                    if (includeLayerSelection) {
                        return Utils.NoNull(state.filteredLayers.data.map(fLayerToParam)).join("&")
                    } else {
                        return null
                    }
                },
                state.filteredLayers.data.map((flayer) => flayer.isDisplayed)
            )
        )

        const switches = [
            { urlName: "fs-userbadge", human: tr.fsUserbadge },
            { urlName: "fs-search", human: tr.fsSearch },
            { urlName: "fs-welcome-message", human: tr.fsWelcomeMessage },
            { urlName: "fs-layers", human: tr.fsLayers },
            { urlName: "fs-add-new", human: tr.fsAddNew },
            { urlName: "fs-geolocation", human: tr.fsGeolocation },
        ]

        for (const swtch of switches) {
            const checkbox = new CheckBox(Translations.W(swtch.human))
            optionCheckboxes.push(checkbox)
            optionParts.push(
                checkbox.GetValue().map((isEn) => {
                    if (isEn) {
                        return null
                    } else {
                        return `${swtch.urlName}=false`
                    }
                })
            )
        }

        if (layout.definitionRaw !== undefined) {
            optionParts.push(new UIEventSource("userlayout=" + (layout.definedAtUrl ?? layout.id)))
        }

        const options = new Combine(optionCheckboxes).SetClass("flex flex-col")
        const url = (currentLocation ?? new UIEventSource(undefined)).map(() => {
            const host = window.location.host
            let path = window.location.pathname
            path = path.substr(0, path.lastIndexOf("/"))
            let id = layout.id.toLowerCase()
            if (layout.definitionRaw !== undefined) {
                id = "theme.html"
            }
            let literalText = `https://${host}${path}/${id}`

            let hash = ""
            if (layout.definedAtUrl === undefined && layout.definitionRaw !== undefined) {
                hash = "#" + LZString.compressToBase64(Utils.MinifyJSON(layout.definitionRaw))
            }
            const parts = Utils.NoEmpty(
                Utils.NoNull(optionParts.map((eventSource) => eventSource.data))
            )
            if (parts.length === 0) {
                return literalText + hash
            }
            return literalText + "?" + parts.join("&") + hash
        }, optionParts)

        const iframeCode = new VariableUiElement(
            url.map((url) => {
                return `<span class='literal-code iframe-code-block'>
                         &lt;iframe src="${url}" allow="geolocation" width="100%" height="100%" style="min-width: 250px; min-height: 250px" title="${
                    layout.title?.txt ?? "MapComplete"
                } with MapComplete"&gt;&lt;/iframe&gt
                    </span>`
            })
        )

        const linkStatus = new UIEventSource<string | Translation>("")
        const link = new VariableUiElement(
            url.map(
                (url) =>
                    `<input type="text" value=" ${url}" id="code-link--copyable" style="width:90%">`
            )
        ).onClick(async () => {
            const shareData = {
                title: Translations.W(layout.title)?.ConstructElement().textContent ?? "",
                text: Translations.W(layout.description)?.ConstructElement().textContent ?? "",
                url: url.data,
            }

            function rejected() {
                const copyText = document.getElementById("code-link--copyable")

                // @ts-ignore
                copyText.select()
                // @ts-ignore
                copyText.setSelectionRange(0, 99999) /*For mobile devices*/

                document.execCommand("copy")
                const copied = tr.copiedToClipboard.Clone()
                copied.SetClass("thanks")
                linkStatus.setData(copied)
            }

            try {
                navigator
                    .share(shareData)
                    .then(() => {
                        const thx = tr.thanksForSharing.Clone()
                        thx.SetClass("thanks")
                        linkStatus.setData(thx)
                    }, rejected)
                    .catch(rejected)
            } catch (err) {
                rejected()
            }
        })

        let downloadThemeConfig: BaseUIElement = undefined
        if (layout.definitionRaw !== undefined) {
            const downloadThemeConfigAsJson = new SubtleButton(
                Svg.download_svg(),
                new Combine([tr.downloadCustomTheme, tr.downloadCustomThemeHelp.SetClass("subtle")])
                    .onClick(() => {
                        Utils.offerContentsAsDownloadableFile(
                            layout.definitionRaw,
                            layout.id + ".mapcomplete-theme-definition.json",
                            {
                                mimetype: "application/json",
                            }
                        )
                    })
                    .SetClass("flex flex-col")
            )
            let editThemeConfig: BaseUIElement = undefined
            if (layout.definedAtUrl === undefined) {
                const patchedDefinition = JSON.parse(layout.definitionRaw)
                patchedDefinition["language"] = Object.keys(patchedDefinition.title)
                editThemeConfig = new SubtleButton(
                    Svg.pencil_svg(),
                    "Edit this theme on the custom theme generator",
                    {
                        url: `https://pietervdvn.github.io/mc/legacy/070/customGenerator.html#${btoa(
                            JSON.stringify(patchedDefinition)
                        )}`,
                    }
                )
            }
            downloadThemeConfig = new Combine([
                downloadThemeConfigAsJson,
                editThemeConfig,
            ]).SetClass("flex flex-col")
        }

        super([
            tr.intro,
            link,
            new VariableUiElement(linkStatus),
            downloadThemeConfig,
            tr.addToHomeScreen,
            tr.embedIntro,
            options,
            iframeCode,
        ])
        this.SetClass("flex flex-col link-underline")
    }
}