/*
 * Vencord, a Discord client mod
 * Copyright (c) 2026 Vendicated and contributors
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

import { DataStore } from "@api/index";

import { DEFAULT_EXTENSION_KEYBINDS, EXTENSION_KEYBINDS_KEY, extensionDefinitionsById, EXTENSIONS_CATALOG, EXTENSIONS_DETAIL_PROVIDER_ID, EXTENSIONS_PACK_PROVIDER_ID, INSTALLED_EXTENSIONS_KEY } from "./catalog";
import type { ExtensionKeybindMap } from "./types";

export interface ExtensionsState {
    ready: Promise<void>;
    installedExtensionIds: Set<string>;
    extensionKeybinds: Map<string, ExtensionKeybindMap>;
    listExtensions(): typeof EXTENSIONS_CATALOG;
    isInstalled(extensionId: string): boolean;
    install(extensionId: string): Promise<boolean>;
    uninstall(extensionId: string): Promise<boolean>;
}

function toExtensionKeybindRecord(extensionKeybinds: Map<string, ExtensionKeybindMap>) {
    const record: Record<string, ExtensionKeybindMap> = {};
    for (const [extensionId, keybinds] of extensionKeybinds) {
        record[extensionId] = keybinds;
    }
    return record;
}

export function createExtensionsState(
    refreshContextProvider: (id: string) => void,
    bumpRegistryVersion: () => void
): ExtensionsState {
    const installedExtensionIds = new Set<string>();
    const extensionKeybinds = new Map<string, ExtensionKeybindMap>();

    const persistInstalledExtensions = async () => {
        try {
            await DataStore.set(INSTALLED_EXTENSIONS_KEY, Array.from(installedExtensionIds));
        } catch {
            return;
        }
    };

    const persistExtensionKeybinds = async () => {
        try {
            await DataStore.set(EXTENSION_KEYBINDS_KEY, toExtensionKeybindRecord(extensionKeybinds));
        } catch {
            return;
        }
    };

    const ready = (async () => {
        try {
            const storedInstalled = await DataStore.get<string[]>(INSTALLED_EXTENSIONS_KEY);
            if (Array.isArray(storedInstalled)) {
                for (const extensionId of storedInstalled) {
                    if (!extensionDefinitionsById.has(extensionId)) continue;
                    installedExtensionIds.add(extensionId);
                }
            }
        } catch {
            return;
        }

        try {
            const storedKeybinds = await DataStore.get<Record<string, ExtensionKeybindMap>>(EXTENSION_KEYBINDS_KEY);
            for (const extension of EXTENSIONS_CATALOG) {
                const stored = storedKeybinds?.[extension.id];
                if (stored?.secondaryActionChord && stored.tertiaryActionChord) {
                    extensionKeybinds.set(extension.id, stored);
                    continue;
                }

                const fallback = DEFAULT_EXTENSION_KEYBINDS[extension.id];
                if (fallback) {
                    extensionKeybinds.set(extension.id, fallback);
                }
            }
        } catch {
            return;
        } finally {
            refreshContextProvider(EXTENSIONS_PACK_PROVIDER_ID);
            refreshContextProvider(EXTENSIONS_DETAIL_PROVIDER_ID);
            bumpRegistryVersion();
        }
    })();

    return {
        ready,
        installedExtensionIds,
        extensionKeybinds,
        listExtensions: () => EXTENSIONS_CATALOG,
        isInstalled: extensionId => installedExtensionIds.has(extensionId),
        install: async extensionId => {
            await ready;
            if (!extensionDefinitionsById.has(extensionId)) return false;
            if (installedExtensionIds.has(extensionId)) return true;

            installedExtensionIds.add(extensionId);
            if (!extensionKeybinds.has(extensionId) && DEFAULT_EXTENSION_KEYBINDS[extensionId]) {
                extensionKeybinds.set(extensionId, DEFAULT_EXTENSION_KEYBINDS[extensionId]);
            }

            await Promise.all([
                persistInstalledExtensions(),
                persistExtensionKeybinds()
            ]);

            refreshContextProvider(EXTENSIONS_PACK_PROVIDER_ID);
            refreshContextProvider(EXTENSIONS_DETAIL_PROVIDER_ID);
            bumpRegistryVersion();
            return true;
        },
        uninstall: async extensionId => {
            await ready;
            if (!extensionDefinitionsById.has(extensionId)) return false;
            if (!installedExtensionIds.has(extensionId)) return true;

            installedExtensionIds.delete(extensionId);
            extensionKeybinds.delete(extensionId);

            await Promise.all([
                persistInstalledExtensions(),
                persistExtensionKeybinds()
            ]);

            refreshContextProvider(EXTENSIONS_PACK_PROVIDER_ID);
            refreshContextProvider(EXTENSIONS_DETAIL_PROVIDER_ID);
            bumpRegistryVersion();
            return true;
        }
    };
}