import { SQLITE_CODES, SqliteError } from "../errors/index.js";
import type { BunDriverOptions } from "../schemas/index.js";

export interface BunDriverResult {
    // biome-ignore lint/suspicious/noExplicitAny: bun:sqlite Database type varies by environment
    sqlite: any;
    close: () => Promise<void>;
}

export function isBunEnvironment(): boolean {
    return typeof Bun !== "undefined";
}

export async function createBunDriver(
    options?: BunDriverOptions
): Promise<BunDriverResult> {
    /* c8 ignore next 5 */
    if (!isBunEnvironment()) {
        throw new SqliteError(
            SQLITE_CODES.ENVIRONMENT_ERROR,
            "createBunDriver requires Bun runtime — use createWasmDriver in browser environments"
        );
    }

    let sqlite: BunDriverResult["sqlite"];
    try {
        const { Database } = await import("bun:sqlite");
        const filename = options?.filename ?? ":memory:";
        sqlite = new Database(filename, {
            create: true,
            readonly: options?.readonly ?? false,
        });
    } catch (err) {
        throw new SqliteError(
            SQLITE_CODES.DRIVER_INIT_FAILED,
            `Failed to open SQLite database: ${err instanceof Error ? err.message : String(err)}`,
            { cause: err instanceof Error ? err : undefined }
        );
    }

    let closed = false;

    return {
        sqlite,
        close: async () => {
            if (closed) return;
            closed = true;
            sqlite.close();
        },
    };
}