/**
 * Writes the reporter settings into the instance database before first launch,
 * and optionally restores a full backup from the master.
 *
 * lib/db.ts seeds its keys with INSERT OR IGNORE, so values written here
 * survive the app's own startup seeding. Must be run from the project root
 * unless AUTOFIRMER_DB points elsewhere — lib/db.ts opens the database at
 * process.cwd() by default, and this script must hit the same file.
 *
 *   node scripts/seed-settings.js <master_dashboard_url> <instance_name> \
 *       [--token <backup_token>] [--restore-from <instance_uuid>]
 *
 * --restore-from pulls that instance's encrypted backup from the master
 * (authenticated by --token) and applies it — settings, firm credentials,
 * instruments, account assignments — before the app has ever booted, so the
 * very first hello to the master already presents the adopted uuid. The
 * backup's instance_name wins over the CLI argument.
 */
const path = require('path');
const { mkdirSync } = require('fs');
const Database = require('better-sqlite3');

const args = process.argv.slice(2);
const positional = [];
let token = '';
let restoreFrom = '';
for (let i = 0; i < args.length; i++) {
    if (args[i] === '--token') token = args[++i] ?? '';
    else if (args[i] === '--restore-from') restoreFrom = args[++i] ?? '';
    else positional.push(args[i]);
}
const [url, name] = positional;

const DB_PATH = process.env.AUTOFIRMER_DB
    ? path.resolve(process.env.AUTOFIRMER_DB)
    : path.join(process.cwd(), 'autotrader.sqlite');

mkdirSync(path.dirname(DB_PATH), { recursive: true });
const db = new Database(DB_PATH);
db.pragma('busy_timeout = 5000');
try {
    db.pragma('journal_mode = WAL');
} catch {
    // Another connection holds the file; keep its journal mode.
}

// Mirrors the schema in lib/db.ts for every table a restore touches. The app
// has usually never run at this point, so the tables may not exist yet; the
// shapes must be kept in sync with lib/db.ts by hand.
db.exec(`
    CREATE TABLE IF NOT EXISTS settings (
        key   TEXT PRIMARY KEY,
        value TEXT NOT NULL
    );

    CREATE TABLE IF NOT EXISTS firm_credentials (
        firm_id    TEXT PRIMARY KEY,
        firm_name  TEXT NOT NULL,
        username   TEXT NOT NULL,
        password   TEXT NOT NULL,
        updated_at TEXT NOT NULL
    );

    CREATE TABLE IF NOT EXISTS instruments (
        symbol  TEXT    PRIMARY KEY,
        enabled INTEGER NOT NULL DEFAULT 1
    );

    CREATE TABLE IF NOT EXISTS account_assignments (
        account_id        INTEGER PRIMARY KEY,
        firm_id           TEXT    NOT NULL,
        account_type_id   TEXT,
        manual            INTEGER NOT NULL DEFAULT 0,
        resolved_at       TEXT    NOT NULL,
        rules_date        TEXT,
        rules_date_manual INTEGER NOT NULL DEFAULT 0
    );
`);
try {
    db.exec("ALTER TABLE firm_credentials ADD COLUMN api_key TEXT NOT NULL DEFAULT ''");
} catch {
    // Column already exists
}
// The rules-date migration, as lib/db.ts runs it — including its backfill:
// adding the column here means lib/db.ts's own ALTER never runs on this file,
// and rows the restore doesn't overwrite must not stay undated. Dated as
// lib/db.ts undatedRowsDate dates them: now, never before the catalog's last
// change (a clock running behind must not date a row into an old rule set).
function undatedRowsDate() {
    const row = db.prepare("SELECT value FROM settings WHERE key = 'catalog_updated_at'").get();
    const floor = row && typeof row.value === 'string' ? Date.parse(row.value) : NaN;
    return new Date(Math.max(Date.now(), Number.isFinite(floor) ? floor : 0)).toISOString();
}
// lib/kept-rules.ts sortableIso: the only rules dates stored are plain
// four-digit-year ISO strings from 2000 on, so string order is time order.
function sortableIso(ms) {
    if (!Number.isFinite(ms) || ms < Date.UTC(2000, 0, 1) || Math.abs(ms) > 8.64e15) return null;
    const iso = new Date(ms).toISOString();
    return /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/.test(iso) ? iso : null;
}
try {
    db.transaction(() => {
        db.exec('ALTER TABLE account_assignments ADD COLUMN rules_date TEXT');
        db.prepare('UPDATE account_assignments SET rules_date = ? WHERE rules_date IS NULL').run(undatedRowsDate());
    }).immediate();
} catch {
    // Column already exists
}
try {
    db.exec('ALTER TABLE account_assignments ADD COLUMN rules_date_manual INTEGER NOT NULL DEFAULT 0');
} catch {
    // Column already exists
}

const upsert = db.prepare(
    'INSERT INTO settings (key, value) VALUES (?, ?) ' +
    'ON CONFLICT(key) DO UPDATE SET value = excluded.value'
);

if (url)   { upsert.run('master_dashboard_url', url);   console.log('  master_dashboard_url = ' + url); }
if (name)  { upsert.run('instance_name', name);         console.log('  instance_name        = ' + name); }
if (token) { upsert.run('master_backup_token', token);  console.log('  master_backup_token  = (set)'); }

// Runtime bookkeeping keys that describe the machine the backup was taken on,
// not the one being provisioned. Kept in sync with lib/backup-restore.ts.
const RESTORE_SKIP_KEYS = new Set([
    'runner_heartbeat',
    'catalog_last_sync_at',
    'catalog_last_error',
    'backup_last_push_at',
    'backup_last_error',
]);

async function restore() {
    if (!restoreFrom) return;
    if (!url)   { console.error('--restore-from needs the master url argument'); process.exit(1); }
    if (!token) { console.error('--restore-from needs --token'); process.exit(1); }

    const endpoint = new URL(`/api/instances/backup/${restoreFrom}`, url);
    console.log(`  restoring from ${endpoint}`);
    const res = await fetch(endpoint, {
        headers: { Authorization: `Bearer ${token}` },
        signal: AbortSignal.timeout(15_000),
    });
    if (!res.ok) {
        console.error(`  restore failed: master answered ${res.status} ${await res.text().catch(() => '')}`);
        process.exit(1);
    }
    const payload = await res.json();
    if (payload?.v !== 1 || typeof payload.settings !== 'object') {
        console.error('  restore failed: unrecognized backup payload');
        process.exit(1);
    }

    const setCred = db.prepare(`
        INSERT INTO firm_credentials (firm_id, firm_name, username, password, api_key, updated_at)
        VALUES (?, ?, ?, ?, ?, ?)
        ON CONFLICT(firm_id) DO UPDATE SET
            firm_name = excluded.firm_name,
            username = excluded.username,
            password = excluded.password,
            api_key = excluded.api_key,
            updated_at = excluded.updated_at
    `);
    const setInstr = db.prepare(
        'INSERT INTO instruments (symbol, enabled) VALUES (?, ?) ' +
        'ON CONFLICT(symbol) DO UPDATE SET enabled = excluded.enabled'
    );
    // lib/db.ts restoreAssignment, by hand: the backup's rules date (and how
    // it was set) wins; a backup from an older build has none, so an existing
    // row keeps its own and a new one is dated at the restore.
    const setAssignDated = db.prepare(`
        INSERT INTO account_assignments (account_id, firm_id, account_type_id, manual, resolved_at, rules_date, rules_date_manual)
        VALUES (?, ?, ?, ?, ?, ?, ?)
        ON CONFLICT(account_id) DO UPDATE SET
            firm_id = excluded.firm_id,
            account_type_id = excluded.account_type_id,
            manual = excluded.manual,
            resolved_at = excluded.resolved_at,
            rules_date = excluded.rules_date,
            rules_date_manual = excluded.rules_date_manual
    `);
    const setAssignUndated = db.prepare(`
        INSERT INTO account_assignments (account_id, firm_id, account_type_id, manual, resolved_at, rules_date)
        VALUES (?, ?, ?, ?, ?, ?)
        ON CONFLICT(account_id) DO UPDATE SET
            firm_id = excluded.firm_id,
            account_type_id = excluded.account_type_id,
            manual = excluded.manual,
            resolved_at = excluded.resolved_at,
            rules_date = COALESCE(account_assignments.rules_date, excluded.rules_date)
    `);

    db.transaction(() => {
        for (const [key, value] of Object.entries(payload.settings)) {
            if (RESTORE_SKIP_KEYS.has(key)) continue;
            if (typeof value !== 'string') continue;
            upsert.run(key, value);
        }
        // The freshly seeded master url wins over whatever the backup recorded:
        // the operator just typed it, and an old backup may point at a dead host.
        if (url) upsert.run('master_dashboard_url', url);
        if (token) upsert.run('master_backup_token', token);

        for (const c of payload.credentials ?? []) {
            setCred.run(c.firm_id, c.firm_name, c.username, c.password, c.api_key ?? '', c.updated_at ?? new Date().toISOString());
        }
        for (const i of payload.instruments ?? []) {
            setInstr.run(i.symbol, i.enabled ? 1 : 0);
        }
        for (const a of payload.assignments ?? []) {
            const now = new Date().toISOString();
            const resolvedAt = a.resolved_at ?? now;
            const rulesDate = typeof a.rules_date === 'string' ? sortableIso(Date.parse(a.rules_date)) : null;
            if (rulesDate) {
                setAssignDated.run(a.account_id, a.firm_id, a.account_type_id ?? null, a.manual ? 1 : 0, resolvedAt,
                    rulesDate, a.rules_date_manual === 1 ? 1 : 0);
            } else {
                setAssignUndated.run(a.account_id, a.firm_id, a.account_type_id ?? null, a.manual ? 1 : 0, resolvedAt, now);
            }
        }
    })();

    console.log(`  restored: ${Object.keys(payload.settings).length} settings, ` +
        `${(payload.credentials ?? []).length} credentials, ` +
        `${(payload.instruments ?? []).length} instruments, ` +
        `${(payload.assignments ?? []).length} assignments`);
    console.log(`  adopted identity: "${payload.settings.instance_name ?? ''}" (${payload.settings.instance_id ?? 'no uuid'})`);
}

restore()
    .catch((err) => { console.error(`  restore failed: ${err.message}`); process.exit(1); })
    .finally(() => db.close());