import { Translation } from "../../UI/i18n/Translation"
import { LayoutConfigJson } from "./Json/LayoutConfigJson"
import LayerConfig from "./LayerConfig"
import { LayerConfigJson } from "./Json/LayerConfigJson"
import Constants from "../Constants"
import TilesourceConfig from "./TilesourceConfig"
import { ExtractImages } from "./Conversion/FixImages"
import ExtraLinkConfig from "./ExtraLinkConfig"
import { Utils } from "../../Utils"
import * as used_languages from "../../assets/generated/used_languages.json"
export default class LayoutConfig {
    public static readonly defaultSocialImage = "assets/SocialImage.png"
    public readonly id: string
    public readonly credits?: string
    public readonly language: string[]
    public readonly title: Translation
    public readonly shortDescription: Translation
    public readonly description: Translation
    public readonly descriptionTail?: Translation
    public readonly icon: string
    public readonly socialImage?: string
    public readonly startZoom: number
    public readonly startLat: number
    public readonly startLon: number
    public widenFactor: number
    public defaultBackgroundId?: string
    public layers: LayerConfig[]
    public tileLayerSources: TilesourceConfig[]
    public readonly clustering?: {
        maxZoom: number
        minNeededElements: number
    }
    public readonly hideFromOverview: boolean
    public lockLocation: boolean | [[number, number], [number, number]]
    public readonly enableUserBadge: boolean
    public readonly enableShareScreen: boolean
    public readonly enableMoreQuests: boolean
    public readonly enableAddNewPoints: boolean
    public readonly enableLayers: boolean
    public readonly enableSearch: boolean
    public readonly enableGeolocation: boolean
    public readonly enableBackgroundLayerSelection: boolean
    public readonly enableShowAllQuestions: boolean
    public readonly enableExportButton: boolean
    public readonly enablePdfDownload: boolean

    public readonly customCss?: string

    public readonly overpassUrl: string[]
    public overpassTimeout: number
    public readonly overpassMaxZoom: number
    public readonly osmApiTileSize: number
    public readonly official: boolean

    public readonly usedImages: string[]
    public readonly extraLink?: ExtraLinkConfig

    public readonly definedAtUrl?: string
    public readonly definitionRaw?: string

    constructor(
        json: LayoutConfigJson,
        official = true,
        options?: {
            definedAtUrl?: string
            definitionRaw?: string
        }
    ) {
        this.official = official
        this.id = json.id
        this.definedAtUrl = options?.definedAtUrl
        this.definitionRaw = options?.definitionRaw
        if (official) {
            if (json.id.toLowerCase() !== json.id) {
                throw "The id of a theme should be lowercase: " + json.id
            }
            if (json.id.match(/[a-z0-9-_]/) == null) {
                throw "The id of a theme should match [a-z0-9-_]*: " + json.id
            }
        }
        const context = this.id
        this.credits = json.credits
        this.language = json.mustHaveLanguage ?? Object.keys(json.title)
        this.usedImages = Array.from(
            new ExtractImages(official, undefined).convertStrict(
                json,
                "while extracting the images of " + json.id + " " + context ?? ""
            )
        ).sort()
        {
            if (typeof json.title === "string") {
                throw `The title of a theme should always be a translation, as it sets the corresponding languages (${context}.title). The themenID is ${
                    this.id
                }; the offending object is ${JSON.stringify(
                    json.title
                )} which is a ${typeof json.title})`
            }
            if (this.language.length == 0) {
                throw `No languages defined. Define at least one language. (${context}.languages)`
            }
            if (json.title === undefined) {
                throw "Title not defined in " + this.id
            }
            if (json.description === undefined) {
                throw "Description not defined in " + this.id
            }
            if (json.widenFactor <= 0) {
                throw "Widenfactor too small, shoud be > 0"
            }
            if (json.widenFactor > 20) {
                throw (
                    "Widenfactor is very big, use a value between 1 and 5 (current value is " +
                    json.widenFactor +
                    ") at " +
                    context
                )
            }
            if (json["hideInOverview"]) {
                throw (
                    "The json for " +
                    this.id +
                    " contains a 'hideInOverview'. Did you mean hideFromOverview instead?"
                )
            }
            if (json.layers === undefined) {
                throw "Got undefined layers for " + json.id + " at " + context
            }
        }
        this.title = new Translation(json.title, "themes:" + context + ".title")
        this.description = new Translation(json.description, "themes:" + context + ".description")
        this.shortDescription =
            json.shortDescription === undefined
                ? this.description.FirstSentence()
                : new Translation(json.shortDescription, "themes:" + context + ".shortdescription")
        this.descriptionTail =
            json.descriptionTail === undefined
                ? undefined
                : new Translation(json.descriptionTail, "themes:" + context + ".descriptionTail")
        this.icon = json.icon
        this.socialImage = json.socialImage ?? LayoutConfig.defaultSocialImage
        if (this.socialImage === "") {
            if (official) {
                throw "Theme " + json.id + " has empty string as social image"
            }
        }
        this.startZoom = json.startZoom
        this.startLat = json.startLat
        this.startLon = json.startLon
        this.widenFactor = json.widenFactor ?? 1.5

        this.defaultBackgroundId = json.defaultBackgroundId
        this.tileLayerSources = (json.tileLayerSources ?? []).map(
            (config, i) => new TilesourceConfig(config, `${this.id}.tileLayerSources[${i}]`)
        )
        // At this point, layers should be expanded and validated either by the generateScript or the LegacyJsonConvert
        this.layers = json.layers.map(
            (lyrJson) =>
                new LayerConfig(
                    <LayerConfigJson>lyrJson,
                    json.id + ".layers." + lyrJson["id"],
                    official
                )
        )

        this.extraLink = new ExtraLinkConfig(
            json.extraLink ?? {
                icon: "./assets/svg/pop-out.svg",
                href: "https://{basepath}/{theme}.html?lat={lat}&lon={lon}&z={zoom}&language={language}",
                newTab: true,
                requirements: ["iframe", "no-welcome-message"],
            },
            context + ".extraLink"
        )

        this.clustering = {
            maxZoom: 16,
            minNeededElements: 250,
        }
        if (json.clustering === false) {
            this.clustering = {
                maxZoom: 0,
                minNeededElements: 100000,
            }
        } else if (json.clustering) {
            this.clustering = {
                maxZoom: json.clustering.maxZoom ?? 18,
                minNeededElements: json.clustering.minNeededElements ?? 250,
            }
        }

        this.hideFromOverview = json.hideFromOverview ?? false
        this.lockLocation = <[[number, number], [number, number]]>json.lockLocation ?? undefined
        this.enableUserBadge = json.enableUserBadge ?? true
        this.enableShareScreen = json.enableShareScreen ?? true
        this.enableMoreQuests = json.enableMoreQuests ?? true
        this.enableLayers = json.enableLayers ?? true
        this.enableSearch = json.enableSearch ?? true
        this.enableGeolocation = json.enableGeolocation ?? true
        this.enableAddNewPoints = json.enableAddNewPoints ?? true
        this.enableBackgroundLayerSelection = json.enableBackgroundLayerSelection ?? true
        this.enableShowAllQuestions = json.enableShowAllQuestions ?? false
        this.enableExportButton = json.enableDownload ?? false
        this.enablePdfDownload = json.enablePdfDownload ?? false
        this.customCss = json.customCss
        this.overpassUrl = Constants.defaultOverpassUrls
        if (json.overpassUrl !== undefined) {
            if (typeof json.overpassUrl === "string") {
                this.overpassUrl = [json.overpassUrl]
            } else {
                this.overpassUrl = json.overpassUrl
            }
        }
        this.overpassTimeout = json.overpassTimeout ?? 30
        this.overpassMaxZoom = json.overpassMaxZoom ?? 16
        this.osmApiTileSize = json.osmApiTileSize ?? this.overpassMaxZoom + 1
    }

    public CustomCodeSnippets(): string[] {
        if (this.official) {
            return []
        }
        const msg =
            "<br/><b>This layout uses <span class='alert'>custom javascript</span>, loaded for the wide internet. The code is printed below, please report suspicious code on the issue tracker of MapComplete:</b><br/>"
        const custom = []
        for (const layer of this.layers) {
            custom.push(...layer.CustomCodeSnippets().map((code) => code + "<br />"))
        }
        if (custom.length === 0) {
            return custom
        }
        custom.splice(0, 0, msg)
        return custom
    }

    public isLeftRightSensitive() {
        return this.layers.some((l) => l.isLeftRightSensitive())
    }

    public missingTranslations(): {
        completeness: Map<string, number>
        untranslated: Map<string, string[]>
        total: number
    } {
        const layout = this
        let total = 0
        const completeness = new Map<string, number>()
        const untranslated = new Map<string, string[]>()

        Utils.WalkObject(
            layout,
            (o) => {
                const translation = <Translation>(<any>o)
                if (translation.translations["*"] !== undefined) {
                    return
                }
                if (translation.context === undefined || translation.context.indexOf(":") < 0) {
                    // no source given - lets ignore
                    return
                }

                total++
                used_languages.languages.forEach((ln) => {
                    const trans = translation.translations
                    if (trans["*"] !== undefined) {
                        return
                    }
                    if (trans[ln] === undefined) {
                        if (!untranslated.has(ln)) {
                            untranslated.set(ln, [])
                        }
                        untranslated.get(ln).push(translation.context)
                    } else {
                        completeness.set(ln, 1 + (completeness.get(ln) ?? 0))
                    }
                })
            },
            (o) => {
                if (o === undefined || o === null) {
                    return false
                }
                return o instanceof Translation
            }
        )

        return { completeness, untranslated, total }
    }
    public getMatchingLayer(tags: any): LayerConfig | undefined {
        if (tags === undefined) {
            return undefined
        }
        for (const layer of this.layers) {
            if (layer.source.osmTags.matchesProperties(tags)) {
                return layer
            }
        }
        return undefined
    }
}