/***
 * Parses presets from the iD repository and extracts some usefull tags from them
 */
import ScriptUtils from "../ScriptUtils";
import {existsSync, readFileSync, writeFileSync} from "fs";
import * as known_languages from "../../assets/language_native.json"
import {LayerConfigJson} from "../../Models/ThemeConfig/Json/LayerConfigJson";
import {MappingConfigJson} from "../../Models/ThemeConfig/Json/QuestionableTagRenderingConfigJson";
import SmallLicense from "../../Models/smallLicense";

interface IconThief {
    steal(iconName: string): boolean
}

interface IdPresetJson {
    icon: string,
    geometry: ("point" | "line" | "area")[]
    /**
     * Extra search terms
     */
    terms: string []
    tags: Record<string, string>
    name: string,
    searchable?: boolean,
}

class IdPreset implements IdPresetJson {
    private _preset: IdPresetJson;

    constructor(preset: IdPresetJson) {
        this._preset = preset;
    }

    public get searchable(): boolean {
        return this._preset.searchable
    }

    public get name() {
        return this._preset.name
    }

    public get terms() {
        return this._preset.terms
    }

    public get tags() {
        return this._preset.tags
    }

    public get geometry() {
        return this._preset.geometry
    }

    public get icon(): string {
        return this._preset.icon
    }

    static fromFile(file: string): IdPreset {
        return new IdPreset(JSON.parse(readFileSync(file, 'utf8')))
    }

    public parseTags(): string | { and: string[] } {
        const preset = this._preset;
        const tagKeys = Object.keys(preset.tags)
        if (tagKeys.length === 1) {
            return tagKeys[0] + "=" + preset.tags[tagKeys[0]]
        } else {
            return {
                and: tagKeys.map(key => key + "=" + preset.tags[key])
            }
        }
    }
}


class MakiThief implements IconThief {
    public readonly _prefix: string;
    private readonly _directory: string;
    private readonly _license: SmallLicense;
    private readonly _targetDir: string;

    constructor(directory: string, targetDir: string,
                license: SmallLicense,
                prefix: string = "maki-") {
        this._license = license;
        this._directory = directory;
        this._targetDir = targetDir;
        this._prefix = prefix;
    }

    public steal(iconName: string): boolean {
        const target = this._targetDir + iconName + ".svg"
        if (existsSync(target)) {
            return true
        }
        try {

            const file = readFileSync(this._directory + iconName + ".svg", "utf8")
            writeFileSync(target, file, 'utf8')

            writeFileSync(target + ".license_info.json",
                JSON.stringify(
                    {...this._license, path: this._prefix + iconName + ".svg"}), 'utf8')
            console.log("Successfully stolen " + iconName)
            return true
        } catch (e) {
            console.log("Could not steal " + iconName + " due to " + e.message)
            return false
        }
    }

}

class AggregateIconThief implements IconThief {
    private readonly makiThiefs: MakiThief[];

    constructor(makiThiefs: MakiThief[]) {
        this.makiThiefs = makiThiefs;
    }


    public steal(iconName: string): boolean {
        for (const makiThief1 of this.makiThiefs) {
            if (iconName.startsWith(makiThief1._prefix)) {
                return makiThief1.steal(iconName.substr(makiThief1._prefix.length))
            }
        }
        return false
    }
}


class IdThief {
    private readonly _idPresetsRepository: string;

    private readonly _tranlationFiles: Record<string, object> = {}
    private readonly _knownLanguages: string[]
    private readonly _iconThief: IconThief;

    public constructor(idPresetsRepository: string, iconThief: IconThief) {
        this._idPresetsRepository = idPresetsRepository;
        this._iconThief = iconThief;
        const knownById = ScriptUtils.readDirRecSync(`${this._idPresetsRepository}/dist/translations/`)
            .map(pth => pth.substring(pth.lastIndexOf('/') + 1, pth.length - '.json'.length))
            .filter(lng => !lng.endsWith('.min'));
        const missing = Object.keys(known_languages).filter(lng => knownById.indexOf(lng.replace('-', '_')) < 0)
        this._knownLanguages = knownById.filter(lng => known_languages[lng] !== undefined)
        console.log("Id knows following languages:", this._knownLanguages.join(", "), "missing:", missing)
    }

    public getTranslation(language: string, ...path: string[]): string {
        let obj = this.loadTranslationFile(language)[language]
        for (const p of path) {
            obj = obj[p]
            if (obj === undefined) {
                return undefined;
            }
        }
        return obj
    }


    /**
     * Creates a mapRendering-mapping for the 'shop' theme
     */
    public readShopIcons(): { if: string | { and: string[] }, then: string }[] {

        const dir = this._idPresetsRepository + "/data/presets/shop"

        const mappings:
            {
                if: string | { and: string[] },
                then: string
            }[] = []
        const files = ScriptUtils.readDirRecSync(dir, 1);
        for (const file of files) {
            const preset = IdPreset.fromFile(file);

            if (!this._iconThief.steal(preset.icon)) {
                continue
            }

            const mapping = {
                if: preset.parseTags(),
                then: "circle:white;./assets/layers/id_presets/" + preset.icon + ".svg"
            }
            mappings.push(mapping)

        }

        return mappings
    }


    /**
     * Creates a tagRenderingConfigJson for the 'shop' theme
     */
    public readShopPresets(): MappingConfigJson[] {

        const dir = this._idPresetsRepository + "/data/presets/shop"

        const mappings: MappingConfigJson[] = []
        const files = ScriptUtils.readDirRecSync(dir, 1);
        for (const file of files) {
            const name = file.substring(file.lastIndexOf('/') + 1, file.length - '.json'.length)
            const preset = IdPreset.fromFile(file)

            if (preset.searchable === false) {
                continue
            }

            console.log(`     ${name} (shop=${preset.tags["shop"]}), ${preset.icon}`)

            const thenClause: Record<string, string> = {
                en: preset.name
            }
            const terms: Record<string, string[]> = {
                en: preset.terms
            }
            for (const lng of this._knownLanguages) {
                const lngMc = lng.replace('-', '_')
                const tr = this.getTranslation(lng, "presets", "presets", "shop/" + name, "name")
                if (tr !== undefined) {
                    thenClause[lngMc] = tr
                }

                const termsTr = this.getTranslation(lng, "presets", "presets", "shop/" + name, "terms")
                if (termsTr !== undefined) {
                    terms[lngMc] = termsTr.split(",")
                }

            }

            let tag = preset.parseTags();
            const mapping : MappingConfigJson= {
                if: tag,
                then: thenClause,
                searchTerms: terms
            }
            if (preset.tags["shop"] == "yes") {
                mapping["hideInAnswer"] = true
                mapping.if["en"] = "Unspecified shop"
            }

            if (this._iconThief.steal(preset.icon)) {
                mapping["icon"] = {
                    path: "./assets/layers/id_presets/" + preset.icon + ".svg",
                    class: "medium"
                }
            } else {
                console.log(preset.icon + " could not be stolen :(")
            }

            mappings.push(mapping)

        }

        return mappings
    }

    private loadTranslationFile(language: string): object {
        const cached = this._tranlationFiles[language]
        if (cached) {
            return cached
        }
        return this._tranlationFiles[language] = JSON.parse(readFileSync(`${this._idPresetsRepository}/dist/translations/${language}.json`, 'utf8'))
    }

}

const targetDir = "./assets/layers/id_presets/"

const makiThief = new MakiThief('../maki/icons/', targetDir + "maki-", {
    authors: ['Maki icon set'],
    license: 'CC0',
    path: null,
    sources: ["https://github.com/mapbox/maki"]
}, 'maki-');


const temakiThief = new MakiThief('../temaki/icons/', targetDir + "temaki-", {
    authors: ['Temaki icon set'],
    license: 'CC0',
    path: null,
    sources: ["https://github.com/ideditor/temaki"]
}, 'temaki-');
const fasThief = new MakiThief('../Font-Awesome/svgs/solid/', targetDir + "fas-", {
    authors: ['Font-Awesome icon set'],
    license: 'CC-BY 4.0',
    path: null,
    sources: ["https://github.com/FortAwesome/Font-Awesome"]
}, 'fas-');
const iconThief = new AggregateIconThief(
    [makiThief, temakiThief, fasThief]
)

const thief = new IdThief("../id-tagging-schema/", iconThief)

const shopLayerPath = targetDir + "id_presets.json"
const idPresets = <LayerConfigJson>JSON.parse(readFileSync(shopLayerPath, 'utf8'))
idPresets.tagRenderings = [
    {
        id: "shop_types",
        mappings: thief.readShopPresets()
    },
    {
        id: "shop_rendering",
        mappings: thief.readShopIcons()
    }
]

writeFileSync(shopLayerPath, JSON.stringify(idPresets, null, "  "), 'utf8')