import { File, FilePen, View, type Icon, Settings, Pencil, MapPin, Scissors, CalendarClock, Group, Ungroup, Filter, SquareDashedMousePointer } from "lucide-svelte";
import type { ComponentType } from "svelte";

export const guides: Record<string, string[]> = {
    'getting-started': [],
    menu: ['file', 'edit', 'view', 'settings'],
    'files-and-stats': [],
    toolbar: ['routing', 'poi', 'scissors', 'time', 'merge', 'extract', 'minify', 'clean'],
    'map-controls': [],
    'gpx': [],
    'integration': [],
};

export const guideIcons: Record<string, string | ComponentType<Icon>> = {
    "getting-started": "🚀",
    "menu": "📂 ⚙️",
    "file": File,
    "edit": FilePen,
    "view": View,
    "settings": Settings,
    "files-and-stats": "🗂 📈",
    "toolbar": "🧰",
    "routing": Pencil,
    "poi": MapPin,
    "scissors": Scissors,
    "time": CalendarClock,
    "merge": Group,
    "extract": Ungroup,
    "minify": Filter,
    "clean": SquareDashedMousePointer,
    "map-controls": "🗺",
    "gpx": "💾",
    "integration": "{ 👩‍💻 }",
};

export function getPreviousGuide(currentGuide: string): string | undefined {
    let subguides = currentGuide.split('/');

    if (subguides.length === 1) {
        let keys = Object.keys(guides);
        let index = keys.indexOf(currentGuide);
        if (index === 0) {
            return undefined;
        }
        let previousGuide = keys[index - 1];
        if (previousGuide === undefined) {
            return undefined;
        } else if (guides[previousGuide].length === 0) {
            return previousGuide;
        } else {
            return `${previousGuide}/${guides[previousGuide][guides[previousGuide].length - 1]}`;
        }
    } else {
        if (guides.hasOwnProperty(subguides[0])) {
            let subguideIndex = guides[subguides[0]].indexOf(subguides[1]);
            if (subguideIndex > 0) {
                return `${subguides[0]}/${guides[subguides[0]][subguideIndex - 1]}`;
            } else {
                return subguides[0];
            }
        } else {
            return undefined;
        }
    }
}

export function getNextGuide(currentGuide: string): string | undefined {
    let subguides = currentGuide.split('/');

    if (subguides.length === 1) {
        if (guides.hasOwnProperty(currentGuide)) {
            if (guides[currentGuide].length === 0) {
                let keys = Object.keys(guides);
                let index = keys.indexOf(currentGuide);
                return keys[index + 1];
            } else {
                return `${currentGuide}/${guides[currentGuide][0]}`;
            }
        } else {
            return undefined;
        }
    } else {
        if (guides.hasOwnProperty(subguides[0])) {
            let subguideIndex = guides[subguides[0]].indexOf(subguides[1]);
            if (subguideIndex < guides[subguides[0]].length - 1) {
                return `${subguides[0]}/${guides[subguides[0]][subguideIndex + 1]}`;
            } else {
                let keys = Object.keys(guides);
                let index = keys.indexOf(subguides[0]);
                return keys[index + 1];
            }
        } else {
            return undefined;
        }
    }
}