import { TradovateClient } from './tradovate-class';
import { getFirms, getInstruments } from './db';
import { resolveContracts } from './contract-resolver';
import { startReporter } from './reporter';

// Use global to persist the client pool across HMR reloads in dev mode
const g = global as typeof globalThis & {
    __tradovateClients?: Map<number, TradovateClient>;
    __tradovateClientsInitialized?: boolean;
    __contractResolverTimer?: ReturnType<typeof setInterval>;
};

function ensureMap(): Map<number, TradovateClient> {
    if (!g.__tradovateClients) {
        g.__tradovateClients = new Map();
    }
    return g.__tradovateClients;
}

export function initClient(id: number, username: string, password: string, firmName: string): TradovateClient {
    const map = ensureMap();
    const client = new TradovateClient(username, password, () => {
        console.log(`[${firmName}] sync complete — ${client.accountList.length} account(s)`);
    });
    map.set(id, client);
    return client;
}

export function removeClient(id: number): void {
    const client = ensureMap().get(id);
    client?.disconnect();
    ensureMap().delete(id);
}

/** Disconnect all clients and clear the pool so they are recreated on next getClients() call. */
export function resetClients(): void {
    const map = g.__tradovateClients;
    if (map) {
        for (const client of map.values()) {
            try { client.disconnect(); } catch { /* ignore */ }
        }
    }
    g.__tradovateClients = undefined;
    g.__tradovateClientsInitialized = false;
}

export function getClients(): Map<number, TradovateClient> {
    const map = ensureMap();
    if (!g.__tradovateClientsInitialized) {
        g.__tradovateClientsInitialized = true;
        try {
            const firms = getFirms();
            for (const firm of firms) {
                initClient(firm.id, firm.username, firm.password, firm.name);
            }
            console.log(`[clients] Initialized ${firms.length} Tradovate client(s)`);

            // Auto-resolve contracts after clients have time to authenticate
            setTimeout(() => triggerContractResolve(), 15_000);

            // Schedule daily resolve at midnight
            scheduleDailyResolve();

            // Start master dashboard reporter
            startReporter();
        } catch (err) {
            console.error('[clients] Failed to initialize clients', err);
        }
    }
    return map;
}

// ── Contract auto-resolve ────────────────────────────────────────────────────

function triggerContractResolve(): void {
    const map = ensureMap();
    // Find first client with a valid access token
    let accessToken: string | null = null;
    for (const [, c] of map) {
        const token = (c as any).accessInfo?.accessToken;
        if (token) { accessToken = token; break; }
    }
    if (!accessToken) {
        console.log('[contract-resolver] No authenticated client yet — skipping resolve');
        return;
    }

    const symbols = getInstruments().filter((i) => i.enabled).map((i) => i.symbol);
    console.log(`[contract-resolver] Resolving ${symbols.length} instruments...`);
    resolveContracts(symbols, accessToken)
        .then((results) => {
            const rolled = Object.entries(results).filter(([, v]) => v?.alternative && v.rolledVolume && v.frontVolume && v.rolledVolume > v.frontVolume);
            console.log(`[contract-resolver] Done — ${rolled.length} contract(s) rolled to higher-volume month`);
        })
        .catch((err) => console.error('[contract-resolver] Resolve failed:', err));
}

function scheduleDailyResolve(): void {
    // Clear any existing timer (HMR safety)
    if (g.__contractResolverTimer) clearInterval(g.__contractResolverTimer);

    // Check every minute if it's midnight (00:00)
    g.__contractResolverTimer = setInterval(() => {
        const now = new Date();
        if (now.getHours() === 0 && now.getMinutes() === 0) {
            console.log('[contract-resolver] Midnight resolve triggered');
            triggerContractResolve();
        }
    }, 60_000);
}