/*
	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Spacebar and Spacebar Contributors
	
	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.
	
	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

import { Connection } from "@spacebar/util";
import fs from "node:fs";
import path from "node:path";
import { ConnectionConfig } from "./ConnectionConfig";
import { ConnectionStore } from "./ConnectionStore";
import { greenBright, redBright } from "picocolors";

const root = path.join(__dirname, "..", "..", "connections");
const connectionsLoaded = false;

export class ConnectionLoader {
    public static async loadConnections() {
        if (connectionsLoaded) return;
        await ConnectionConfig.init();
        const dirs = fs.readdirSync(root).filter((x) => {
            try {
                fs.readdirSync(path.join(root, x));
                return true;
            } catch (e) {
                return false;
            }
        });

        dirs.forEach((x) => {
            const modPath = path.resolve(path.join(root, x));
            const mod = new (require(modPath).default)() as Connection;
            ConnectionStore.connections.set(mod.id, mod);

            mod.init();
            console.log(`[Connections] Loaded connection '${mod.id}' (${mod.friendlyName}) -`, mod.settings.enabled ? greenBright("enabled") : redBright("disabled"));
            if (mod.settings.enabled && !mod.isConfigured) {
                console.log(`[Connections/${mod.id}] Connection is enabled, but not configured! Users will not be able to successfully link with ${mod.friendlyName}!`);
                if (mod.requiredScopes.length > 0) {
                    console.log(`[Connections/${mod.id}] Configuring this connection requires setting scopes, or has additional requirements:`);
                    for (const scope in mod.requiredScopes) console.log(`[Connections/${mod.id}]   - ${scope}`);
                    console.log(`[Connections/${mod.id}] You can obtain the required credentials here: ${mod.setupUrl}`);
                }
            }
        });
    }

    public static getConnectionConfig<T>(id: string, defaults?: unknown): T {
        let cfg = ConnectionConfig.get()[id];
        if (defaults) {
            if (cfg) cfg = Object.assign({}, defaults, cfg);
            else {
                cfg = defaults;
                this.setConnectionConfig(id, cfg).catch((e) => console.error(`[Connections/ERROR] Failed to set default config for '${id}'!`, e));
            }
        }

        if (cfg?.enabled) console.log(`[Connections] ${id} enabled`);

        // if (!cfg)
        // 	console.log(
        // 		`[ConnectionConfig/WARN] Getting connection settings for '${id}' returned null! (Did you forget to add settings?)`,
        // 	);
        return cfg;
    }

    public static async setConnectionConfig(id: string, config: Partial<unknown>): Promise<void> {
        if (!config) console.warn(`[Connections/WARN] ${id} tried to set config=null!`);

        await ConnectionConfig.set({
            [id]: Object.assign(config, ConnectionLoader.getConnectionConfig(id) || {}),
        });
    }
}