import type { BUN_SQLITE_COBBLE_BOT_SESSIONS } from "@/db/types/db";
import BunSQLite from "@moduletrace/bun-sqlite";
import createBotSession from "./create-bot-session";
import grabActiveBotSession from "./grab-active-bot-session";

type Params = {
    /**
     * The user the conversation is with.
     */
    user_id: number | string;
    bot_id: number | string;
    workspace_id?: number | string | null;
};

/**
 * New session: closes the conversation's active session and starts a
 * fresh one, linked to nothing and carrying nothing over. Carrying a
 * conversation on is `carryOverBotSession` (the bot, Continue in new
 * session, the rollover). An active session with no messages yet is kept
 * as it is.
 */
export default async function startBotSession({
    user_id,
    bot_id,
    workspace_id,
}: Params): Promise<BUN_SQLITE_COBBLE_BOT_SESSIONS> {
    const active = await grabActiveBotSession({ user_id, bot_id, workspace_id });

    if (active?.id) {
        const has_messages = (
            await BunSQLite.sql({
                sql: `SELECT id FROM bot_messages WHERE session_id = ? LIMIT 1`,
                values: [active.id],
            })
        ).payload?.[0];

        if (!has_messages) return active;

        await BunSQLite.sql({
            sql: `UPDATE bot_sessions SET status = 'closed', unread = 0, updated_at = ? WHERE id = ?`,
            values: [Date.now(), active.id],
        });
    }

    return await createBotSession({ user_id, bot_id, workspace_id });
}