import { SQLiteDatabase } from "expo-sqlite";
import { getDb } from "./db";

export class Settings {

    static KEYS = [
        "host_language",
        "libretranslate_base_url",
        'ui_direction',
        "whisper_model",
    ]

    constructor(public db: SQLiteDatabase) {

    }

    private async getValue(key: string) {
        // For security...ensure key is a valid value
        if (!Settings.KEYS.includes(key)) {
            throw new Error(`Invalid setting: '${key}'`)
        }

        const row: { [key: string]: string } | null = this.db.getFirstSync(`SELECT ${key} from settings LIMIT 1`)

        if (!(row && row[key])) return undefined;
        return row[key];
    }


    private async setValue(key: string, value: any) {
        if (!Settings.KEYS.includes(key)) {
            throw new Error(`Invalid setting: '${key}'`);
        }

        // Check if the key already exists
        this.db.runSync(`INSERT INTO OR UPDATE
            settings
                (${key})
            VALUES
                (?)
            WHERE
                ${key} IS NOT NULL`, value);
    }

    async setHostLanguage(value: string) {
        await this.setValue("host_language", value);
    }

    async getHostLanguage() {
        return await this.getValue("host_language")
    }

    async setLibretranslateBaseUrl(value: string) {
        await this.setValue("libretranslate_base_url", value)
    }

    async getLibretranslateBaseUrl() {
        return await this.getValue("libretranslate_base_url")
    }

    async setWhisperModel(value: string) {
        await this.setValue("whisper_model", value);
    }

    async getWhisperModel() {
        return await this.getValue("whisper_model");
    }

    static async getDefault() {
        return new Settings(await getDb())
    }

}