//! Advanced Integration Scenarios
//!
//! This file contains real-world integration scenarios that combine multiple
//! SDK components:
//! - End-to-end transaction workflows
//! - Multi-step operations with error recovery
//! - Cross-component integration patterns
//! - Production-like usage scenarios
//! - Advanced client configuration patterns

use std::{error::Error, str::FromStr, time::Duration};

use alloy_primitives::{Address, U256};
use onemoney_protocol::{
    Authority, AuthorityAction, Client, TokenAuthorityPayload, TokenMintPayload,
    client::{builder::ClientBuilder, config::Network},
};

//
// ============================================================================
// REAL-WORLD TRANSACTION WORKFLOWS
// ============================================================================
//

#[tokio::test]
async fn test_complete_token_lifecycle_simulation() -> Result<(), Box<dyn Error>> {
    // Simulate a complete token lifecycle: creation -> mint -> authority management

    // Step 1: Create clients for different actors
    let issuer_client = create_test_client("issuer")?;
    let _recipient_client = create_test_client("recipient")?;
    let _authority_client = create_test_client("authority")?;

    // Step 2: Define token parameters
    let token_address = Address::from_str("0x1234567890123456789012345678901234567890")?;
    let recipient_address = Address::from_str("0x9876543210987654321098765432109876543210")?;
    let authority_address = Address::from_str("0xabcdefabcdefabcdefabcdefabcdefabcdefabcd")?;

    // Step 3: Create token mint payload
    let mint_payload = TokenMintPayload {
        chain_id: 1,
        nonce: 1,
        token: token_address,
        recipient: recipient_address,
        value: U256::from(1000000000000000000u64), // 1 token
    };

    // Step 4: Create authority payload
    let authority_payload = TokenAuthorityPayload {
        chain_id: 1,
        nonce: 2,
        action: AuthorityAction::Grant,
        authority_type: Authority::MintBurnTokens,
        authority_address,
        token: token_address,
        value: U256::from(5000000000000000000u64), // 5 tokens authority
    };

    // Step 5: Verify all components can be created and serialized
    let mint_json = serde_json::to_string(&mint_payload)?;
    let authority_json = serde_json::to_string(&authority_payload)?;

    assert!(mint_json.contains("token"));
    assert!(authority_json.contains("authority_type"));

    // Step 6: Simulate signature generation (would fail with mock data, but test
    // the flow)
    let test_private_key = "1234567890123456789012345678901234567890123456789012345678901234";

    // These would fail in a real scenario due to network calls, but we're testing
    // the workflow
    let mint_result = issuer_client.mint_token(mint_payload, test_private_key).await;
    let authority_result = issuer_client.grant_authority(authority_payload, test_private_key).await;

    // We expect these to fail due to network issues, but the payloads should be
    // valid
    assert!(mint_result.is_err()); // Expected due to unreachable endpoint
    assert!(authority_result.is_err()); // Expected due to unreachable endpoint

    println!("Token lifecycle simulation completed successfully");
    Ok(())
}

#[test]
fn test_multi_client_coordination_pattern() -> Result<(), Box<dyn Error>> {
    // Test pattern where multiple clients coordinate operations

    let clients: Vec<Client> = (0..5)
        .map(|i| create_test_client(&format!("client_{}", i)))
        .collect::<Result<Vec<_>, _>>()?;

    // Each client should be independently configured
    for (i, client) in clients.iter().enumerate() {
        let debug_str = format!("{:?}", client);
        assert!(debug_str.contains("Client"));
        println!("Client {}: {:?}", i, debug_str);
    }

    // Test that clients can handle concurrent operations
    let addresses: Vec<Address> = (0..5).map(|i| Address::from([(i as u8 + 1) * 42; 20])).collect();

    // Create payloads that could be used by each client
    let payloads: Result<Vec<TokenMintPayload>, Box<dyn Error>> = addresses
        .into_iter()
        .enumerate()
        .map(|(i, addr)| {
            Ok(TokenMintPayload {
                chain_id: 1,
                nonce: i as u64 + 1,
                token: addr,
                recipient: addr,
                value: U256::from((i as u64 + 1) * 1000000000000000000u64),
            })
        })
        .collect();

    let payloads = payloads?;

    // Verify each payload is unique and valid
    for (i, payload) in payloads.iter().enumerate() {
        let json = serde_json::to_string(payload)?;
        let value = serde_json::to_string(&U256::from((i as u64 + 1) * 1000000000000000000u64))?;
        assert!(json.contains(&value));
        println!("Payload {}: {} bytes", i, json.len());
    }

    Ok(())
}

//
// ============================================================================
// ERROR RECOVERY AND RESILIENCE PATTERNS
// ============================================================================
//

#[tokio::test]
async fn test_client_recovery_from_network_errors() {
    // Test client behavior when network operations fail

    let client = create_unreachable_test_client("recovery_test").expect("Client creation should succeed");

    // Test graceful handling of unreachable endpoints
    let test_operations = ["get_chain_id", "get_checkpoint_number"];

    for operation in test_operations {
        match operation {
            "get_chain_id" => {
                let result = client.fetch_chain_id_from_network().await;
                println!("fetch_chain_id_from_network result: {:?}", result);

                // Check if we have an actual error or success
                match result {
                    Ok(chain_id) => {
                        println!("Unexpected success: got chain ID {}", chain_id);
                        panic!(
                            "Expected network error but got successful response with chain ID: {}",
                            chain_id
                        );
                    }
                    Err(err) => {
                        println!("Operation {} failed as expected: {:?}", operation, err);
                    }
                }
            }
            "get_checkpoint_number" => {
                let result = client.get_checkpoint_number().await;
                assert!(result.is_err(), "Should fail gracefully for {}", operation);
                println!("Operation {} failed as expected: {:?}", operation, result.err());
            }
            _ => unreachable!(),
        }
    }
}

#[test]
fn test_configuration_validation_patterns() -> Result<(), Box<dyn Error>> {
    // Test various client configuration scenarios

    let config_scenarios = [
        ("minimal_timeout", Duration::from_millis(1)),
        ("standard_timeout", Duration::from_secs(30)),
        ("extended_timeout", Duration::from_secs(300)),
        ("maximum_timeout", Duration::from_secs(3600)),
    ];

    for (name, timeout) in config_scenarios {
        let result = ClientBuilder::new().network(Network::Local).timeout(timeout).build();

        match result {
            Ok(client) => {
                println!("Configuration '{}' succeeded: {:?}", name, format!("{:?}", client));
            }
            Err(e) => {
                println!("Configuration '{}' failed: {:?}", name, e);
                // Some configurations might fail, which is acceptable
            }
        }
    }

    // Test network-specific configurations
    let networks = [Network::Mainnet, Network::Testnet, Network::Local];

    for network in networks {
        let client = ClientBuilder::new()
            .network(network.clone())
            .timeout(Duration::from_secs(10))
            .build()?;

        let debug_info = format!("{:?}", client);
        assert!(debug_info.contains("Client"));
        println!("Network {:?} client: {}", network, debug_info);
    }

    Ok(())
}

//
// ============================================================================
// ADVANCED DATA FLOW SCENARIOS
// ============================================================================
//

#[test]
fn test_complex_payload_transformations() -> Result<(), Box<dyn Error>> {
    // Test complex transformations and validations of payloads

    let base_payload = TokenMintPayload {
        chain_id: 1,
        nonce: 1,
        token: Address::ZERO,
        recipient: Address::ZERO,
        value: U256::from(1000000000000000000u64),
    };

    // Test payload modifications
    let variations = [
        (
            "different_token",
            TokenMintPayload {
                token: Address::from([0x42; 20]),
                ..base_payload
            },
        ),
        (
            "different_recipient",
            TokenMintPayload {
                recipient: Address::from([0x24; 20]),
                ..base_payload
            },
        ),
        (
            "different_value",
            TokenMintPayload {
                value: U256::from(2000000000000000000u64),
                ..base_payload
            },
        ),
        (
            "different_nonce",
            TokenMintPayload {
                nonce: 999,
                ..base_payload
            },
        ),
    ];

    for (name, payload) in variations {
        // Test serialization
        let json = serde_json::to_string(&payload)?;
        println!("Variation '{}': {} characters", name, json.len());

        // Test deserialization
        let restored: TokenMintPayload = serde_json::from_str(&json)?;

        // Verify transformation preserved intended changes
        match name {
            "different_token" => {
                assert_ne!(restored.token, Address::ZERO);
                assert_eq!(restored.token, Address::from([0x42; 20]));
            }
            "different_recipient" => {
                assert_ne!(restored.recipient, Address::ZERO);
                assert_eq!(restored.recipient, Address::from([0x24; 20]));
            }
            "different_value" => {
                assert_ne!(restored.value, U256::from(1000000000000000000u64));
                assert_eq!(restored.value, U256::from(2000000000000000000u64));
            }
            "different_nonce" => {
                assert_ne!(restored.nonce, 1);
                assert_eq!(restored.nonce, 999);
            }
            _ => unreachable!(),
        }
    }

    Ok(())
}

#[tokio::test]
async fn test_cross_component_data_consistency() -> Result<(), Box<dyn Error>> {
    // Test that data remains consistent across different SDK components

    let test_address = Address::from_str("0x1234567890123456789012345678901234567890")?;
    let test_value = U256::from(1500000000000000000u64);

    // Create payload
    let payload = TokenMintPayload {
        chain_id: 42,
        nonce: 5,
        token: test_address,
        recipient: test_address,
        value: test_value,
    };

    // Test JSON round-trip consistency
    let json = serde_json::to_string(&payload)?;
    let restored: TokenMintPayload = serde_json::from_str(&json)?;

    assert_eq!(payload.chain_id, restored.chain_id);
    assert_eq!(payload.nonce, restored.nonce);
    assert_eq!(payload.token, restored.token);
    assert_eq!(payload.recipient, restored.recipient);
    assert_eq!(payload.value, restored.value);

    // Test that client can handle the payload
    let client = create_test_client("consistency_test")?;
    let test_private_key = "abcdefabcdefabcdefabcdefabcdefabcdefabcdefabcdefabcdefabcdefab01";

    // This will fail due to network, but should not panic or corrupt data
    let result = client.mint_token(payload, test_private_key).await;
    assert!(result.is_err(), "Expected network failure");

    println!("Cross-component consistency test passed");
    Ok(())
}

//
// ============================================================================
// HELPER FUNCTIONS
// ============================================================================
//

fn create_test_client(name: &str) -> Result<Client, Box<dyn Error>> {
    let client = ClientBuilder::new()
        .network(Network::Local)
        .timeout(Duration::from_secs(5))
        .build()?;

    println!("Created test client '{}': {:?}", name, format!("{:?}", client));
    Ok(client)
}

fn create_unreachable_test_client(name: &str) -> Result<Client, Box<dyn Error>> {
    // Use a port that's guaranteed to be unreachable
    let client = ClientBuilder::new()
        .network(Network::Custom("http://127.0.0.1:19999".into())) // Different port that should be unreachable
        .timeout(Duration::from_secs(2)) // Shorter timeout for faster test
        .build()?;
    println!(
        "Created unreachable test client '{}': {:?}",
        name,
        format!("{:?}", client)
    );
    Ok(client)
}

//
// ============================================================================
// PERFORMANCE AND SCALE TESTING
// ============================================================================
//

#[test]
fn test_high_volume_payload_processing() -> Result<(), Box<dyn Error>> {
    use std::time::Instant;

    let start = Instant::now();
    let payload_count = 100;

    let mut payloads = Vec::with_capacity(payload_count);

    for i in 0..payload_count {
        let payload = TokenMintPayload {
            chain_id: 1,
            nonce: i as u64 + 1,
            token: Address::from([(i % 256) as u8; 20]),
            recipient: Address::from([((i + 1) % 256) as u8; 20]),
            value: U256::from((i as u64 + 1) * 1000000000000000u64),
        };

        // Process the payload
        let json = serde_json::to_string(&payload)?;
        let _restored: TokenMintPayload = serde_json::from_str(&json)?;

        payloads.push(payload);
    }

    let duration = start.elapsed();
    let avg_time = duration / payload_count as u32;

    println!(
        "Processed {} payloads in {:?} (avg: {:?})",
        payload_count, duration, avg_time
    );

    // Should process efficiently
    assert!(
        avg_time < Duration::from_millis(1),
        "Payload processing too slow: {:?} per payload",
        avg_time
    );

    assert_eq!(payloads.len(), payload_count);

    Ok(())
}
