import { createHash, randomUUID } from 'node:crypto';

/** Seed verified host inventory without copying a complete game distribution. */
export async function prepareNativeHost(servers: string[] = []) {
    const { config } = await import('../../src/lib/server/config.js');
    const hosts = await import('../../src/lib/server/hosts/index.js');
    const libraries = await import('../../src/lib/server/game-files/index.js');
    const { db } = await import('../../src/lib/server/db/index.js');
    const host = hosts.createHost({ name: 'Fixture host', portMin: 28960, portMax: 29060 });
    const inventory = {
        protocolVersion: 1,
        cpuCount: 64,
        cpuUsagePercent: 0,
        memoryTotal: 128 * 1024 ** 3,
        memoryAvailable: 120 * 1024 ** 3,
        dockerRunning: true,
        directoriesWritable: true,
        storageAvailable: 100_000_000_000,
        preparedRuntimeImages: [config.defaultRuntimeImage]
    };
    hosts.enrollHost(hosts.createEnrollment(host.id).token, inventory);
    const versions = new Map<string, string>();
    for (const game of ['t5', 't6'] as const) {
        const version = libraries.createLibraryImport({ hostId: host.id, game });
        const manifest = JSON.stringify([
            {
                path: 'zone/base.ff',
                size: 4,
                sha256: createHash('sha256').update('game').digest('hex')
            }
        ]);
        const hash = createHash('sha256').update(manifest).digest('hex');
        db()
            .prepare(
                "UPDATE game_file_versions SET state='ready',manifest=?,manifest_sha256=?,size_bytes=4,published_at=? WHERE id=?"
            )
            .run(manifest, hash, new Date().toISOString(), version.id);
        libraries.updateHostLibraryCaches(host.id, [
            { libraryVersionId: version.id, status: 'ready', manifestSha256: hash }
        ]);
        versions.set(game, version.id);
    }
    const heartbeat = () =>
        hosts.heartbeat(host.id, {
            ...inventory,
            libraries: [...versions.values()].map((id) => ({ id, state: 'ready' as const }))
        });
    heartbeat();
    for (const [index, server] of servers.entries()) {
        db()
            .prepare(
                `INSERT INTO native_instances(id,server,host_id,library_id,image,port,created_at)
            VALUES(?,?,?,?,?,?,?)`
            )
            .run(
                randomUUID(),
                server,
                host.id,
                versions.get(server.startsWith('t6_') ? 't6' : 't5'),
                config.defaultRuntimeImage,
                28960 + index,
                new Date().toISOString()
            );
    }
    return { host, versions, heartbeat };
}