//! Example of parsing and working with DID documents

use atproto_plc::{Did, DidBuilder, PlcState, ServiceEndpoint, SigningKey};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("DID Document Parsing Example\n");
    println!("{}", "=".repeat(60));

    // Create a DID and document
    println!("\n1. Creating a new DID...");
    let rotation_key = SigningKey::generate_p256();
    let signing_key = SigningKey::generate_k256();

    let (did, operation, _keys) = DidBuilder::new()
        .add_rotation_key(rotation_key)
        .add_verification_method("atproto".into(), signing_key)
        .add_also_known_as("at://alice.bsky.social".into())
        .add_service(
            "atproto_pds".into(),
            ServiceEndpoint::new(
                "AtprotoPersonalDataServer".into(),
                "https://pds.example.com".into(),
            ),
        )
        .build()?;

    println!("   Created DID: {}", did);

    // Extract state from operation
    println!("\n2. Extracting PLC state from operation...");
    let state = if let Some(rotation_keys) = operation.rotation_keys() {
        let mut state = PlcState::new();
        state.rotation_keys = rotation_keys.to_vec();
        // In a real scenario, we'd extract all fields from the operation
        state
    } else {
        PlcState::new()
    };

    println!("   Rotation keys: {}", state.rotation_keys.len());

    // Convert to W3C DID Document
    println!("\n3. Converting to W3C DID Document...");
    let doc = state.to_did_document(&did);

    println!("   Document ID: {}", doc.id);
    println!("   Verification methods: {}", doc.verification_method.len());
    println!("   Services: {}", doc.service.len());
    println!("   Also known as: {}", doc.also_known_as.len());

    // Serialize to JSON
    println!("\n4. Serializing to JSON...");
    let json = serde_json::to_string_pretty(&doc)?;
    println!("\nDID Document (JSON):\n{}", json);

    // Parse back from JSON
    println!("\n5. Parsing back from JSON...");
    let parsed_doc: atproto_plc::DidDocument = serde_json::from_str(&json)?;
    println!("   ✅ Successfully parsed!");
    println!("   Parsed ID: {}", parsed_doc.id);

    // Validate
    println!("\n6. Validating document...");
    match parsed_doc.validate() {
        Ok(_) => println!("   ✅ Document is valid!"),
        Err(e) => println!("   ❌ Validation error: {}", e),
    }

    println!("\n{}", "=".repeat(60));
    println!("\nExample complete!");

    Ok(())
}