import { SQLiteDatabase } from "expo-sqlite";
import FileSystem from "expo-file-system"
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 query = `
SELECT ${key}
FROM settings
LIMIT 1`
        const result = await this.db.getFirstAsync(
            query
        );
        
        return result ? (result as any)[key] : null;
    }

    private async setValue(key: string, value: any) {
        if (!Settings.KEYS.includes(key)) {
            throw new Error(`Invalid setting: '${key}'`)
        }
        const statement = `REPLACE INTO settings (${key}) VALUES (?)`
        await this.db.runAsync(statement, 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())
    }

}