import { readFileSync, existsSync } from 'fs';
import { join } from 'path'; // Though join might not be used if manifestPath is absolute

// Placeholder for your qDHT client/library
// You'll need to replace this with your actual qDHT implementation
async function connectToQDHT() {
    console.log("Simulating connection to qDHT...");
    // In a real scenario, this would establish a connection to your qDHT network
    return {
        publish: async (manifestId: string, manifestContent: string, version: string) => {
            const publishKey = `${manifestId}@${version}`;
            console.log(`Simulating publishing manifest ${publishKey} to qDHT.`);
            // In a real scenario, this would broadcast the manifest to the qDHT
            await new Promise(resolve => setTimeout(resolve, 500)); // Simulate network delay
            console.log(`Manifest ${publishKey} published successfully (simulated).`);
            return true;
        },
        disconnect: async () => {
            console.log("Simulating disconnection from qDHT...");
        }
    };
}

export async function publishManifestToQDHT(manifestPath: string) {
    console.log(`🚀 Publishing manifest to qDHT from: ${manifestPath}`);

    if (!existsSync(manifestPath)) {
        console.error(`❌ Error: Manifest file not found at ${manifestPath}`);
        process.exit(1);
    }

    try {
        const manifestContent = readFileSync(manifestPath, 'utf-8');
        const manifest = JSON.parse(manifestContent);

        if (!manifest.id || !manifest.version) {
            console.error("❌ Error: Manifest is missing 'id' or 'version'. Cannot publish.");
            process.exit(1);
        }

        console.log(`📦 Manifest loaded: ${manifest.id} v${manifest.version}`);

        // 1. Connect to the qDHT
        const qdhtClient = await connectToQDHT();

        // 2. Publish the manifest content
        const success = await qdhtClient.publish(manifest.id, manifestContent, manifest.version);

        if (success) {
            console.log(`✅ Successfully published ${manifest.id}@${manifest.version} to the qDHT.`);
        } else {
            console.error(`🔥 Failed to publish ${manifest.id}@${manifest.version} to the qDHT.`);
        }

        // 3. Disconnect from qDHT (if necessary)
        await qdhtClient.disconnect();

    } catch (error) {
        console.error(`❌ An error occurred during publishing to qDHT:`, error);
        if (error instanceof SyntaxError) {
            console.error("   Please ensure the manifest file is valid JSON.");
        }
        process.exit(1);
    }
}