import Toggle from "../Input/Toggle"
import Lazy from "../Base/Lazy"
import { Utils } from "../../Utils"
import Translations from "../i18n/Translations"
import Combine from "../Base/Combine"
import Locale from "../i18n/Locale"
import LayoutConfig from "../../Models/ThemeConfig/LayoutConfig"
import { Translation } from "../i18n/Translation"
import { VariableUiElement } from "../Base/VariableUIElement"
import Link from "../Base/Link"
import LinkToWeblate from "../Base/LinkToWeblate"
import Toggleable from "../Base/Toggleable"
import Title from "../Base/Title"
import { Store } from "../../Logic/UIEventSource"
import { SubtleButton } from "../Base/SubtleButton"
import Svg from "../../Svg"
import * as native_languages from "../../assets/language_native.json"
import * as used_languages from "../../assets/generated/used_languages.json"
import BaseUIElement from "../BaseUIElement"

class TranslatorsPanelContent extends Combine {
    constructor(layout: LayoutConfig, isTranslator: Store<boolean>) {
        const t = Translations.t.translations

        const { completeness, untranslated, total } =
            TranslatorsPanel.MissingTranslationsFor(layout)

        const seed = t.completeness
        for (const ln of Array.from(completeness.keys())) {
            if (ln === "*") {
                continue
            }
            if (seed.translations[ln] === undefined) {
                seed.translations[ln] = seed.translations["en"]
            }
        }

        const completenessTr = {}
        const completenessPercentage = {}
        seed.SupportedLanguages().forEach((ln) => {
            completenessTr[ln] = "" + (completeness.get(ln) ?? 0)
            completenessPercentage[ln] =
                "" + Math.round((100 * (completeness.get(ln) ?? 0)) / total)
        })

        function missingTranslationsFor(language: string): BaseUIElement[] {
            // e.g. "themes:<themename>.layers.0.tagRenderings..., or "layers:<layername>.description
            const missingKeys = Utils.NoNull(untranslated.get(language) ?? [])
                .filter((ctx) => ctx.indexOf(":") >= 0)
                .map((ctx) => ctx.replace(/note_import_[a-zA-Z0-9_]*/, "note_import"))

            const hasMissingTheme = missingKeys.some((k) => k.startsWith("themes:"))
            const missingLayers = Utils.Dedup(
                missingKeys
                    .filter((k) => k.startsWith("layers:"))
                    .map((k) => k.slice("layers:".length).split(".")[0])
            )

            console.log(
                "Getting untranslated string for",
                language,
                "raw:",
                missingKeys,
                "hasMissingTheme:",
                hasMissingTheme,
                "missingLayers:",
                missingLayers
            )
            return Utils.NoNull([
                hasMissingTheme
                    ? new Link(
                          "themes:" + layout.id + ".* (zen mode)",
                          LinkToWeblate.hrefToWeblateZen(language, "themes", layout.id),
                          true
                      )
                    : undefined,
                ...missingLayers.map(
                    (id) =>
                        new Link(
                            "layer:" + id + ".* (zen mode)",
                            LinkToWeblate.hrefToWeblateZen(language, "layers", id),
                            true
                        )
                ),
                ...missingKeys.map(
                    (context) =>
                        new Link(context, LinkToWeblate.hrefToWeblate(language, context), true)
                ),
            ])
        }

        // "translationCompleteness": "Translations for {theme} in {language} are at {percentage}: {translated} out of {total}",
        const translated = seed.Subs({
            total,
            theme: layout.title,
            percentage: new Translation(completenessPercentage),
            translated: new Translation(completenessTr),
            language: seed.OnEveryLanguage((_, lng) => native_languages[lng] ?? lng),
        })

        super([
            new Title(Translations.t.translations.activateButton),
            new Toggle(t.isTranslator.SetClass("thanks block"), undefined, isTranslator),
            t.help,
            translated,
            /*Disable button:*/
            new SubtleButton(undefined, t.deactivate).onClick(() => {
                Locale.showLinkToWeblate.setData(false)
            }),

            new VariableUiElement(
                Locale.language.map((ln) => {
                    const missing = missingTranslationsFor(ln)
                    if (missing.length === 0) {
                        return undefined
                    }
                    let title = Translations.t.translations.allMissing
                    if (untranslated.get(ln) !== undefined) {
                        title = Translations.t.translations.missing.Subs({
                            count: untranslated.get(ln).length,
                        })
                    }
                    return new Toggleable(
                        new Title(title),
                        new Combine(missing).SetClass("flex flex-col")
                    )
                })
            ),
        ])
    }
}

export default class TranslatorsPanel extends Toggle {
    constructor(
        state: { layoutToUse: LayoutConfig; isTranslator: Store<boolean> },
        iconStyle?: string
    ) {
        const t = Translations.t.translations
        super(
            new Lazy(
                () => new TranslatorsPanelContent(state.layoutToUse, state.isTranslator)
            ).SetClass("flex flex-col"),
            new SubtleButton(Svg.translate_ui().SetStyle(iconStyle), t.activateButton).onClick(() =>
                Locale.showLinkToWeblate.setData(true)
            ),
            Locale.showLinkToWeblate
        )
        this.SetClass("hidden-on-mobile")
    }

    public static MissingTranslationsFor(layout: LayoutConfig): {
        completeness: Map<string, number>
        untranslated: Map<string, string[]>
        total: number
    } {
        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 }
    }
}