anya-core 1.2.0

use std::error::Error;
use anyhow::{Context, Result};
use serde::{Deserialize, Serialize};
use std::path::{Path, PathBuf};
use indicatif::{ProgressBar, ProgressStyle};
use bitcoin::psbt::PartiallySignedTransaction;
use bitcoin_protocol::validator::validate_psbt;

/// Installation source types
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum InstallationSource {
    Local {
        path: PathBuf,
        checksum: String,
    },
    GitHubRelease {
        repo: String,
        version: String,
        asset: String,
    },
    CustomRepository {
        url: String,
        package: String,
        version: String,
    },
    PackageRepository {
        name: String,
        version: String,
    },
    EnterpriseCluster {
        license_key: String,
        cluster_url: String,
        psbt_contract: Option<PartiallySignedTransaction>,
    },
}

impl InstallationSource {
    /// Validate source configuration against Bitcoin protocol requirements
    pub fn validate(&self) -> Result<()> {
        match self {
            Self::EnterpriseCluster { psbt_contract, .. } => {
                if let Some(psbt) = psbt_contract {
                    validate_psbt(psbt)
                        .context("PSBT contract validation failed")?;
                }
                Ok(())
            }
            _ => Ok(())
        }
    }
}

/// Installation handler with BIP compliance
pub struct InstallationHandler {
    source: InstallationSource,
    bitcoin_config: BitcoinConfig,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct BitcoinConfig {
    pub network: BitcoinNetwork,
    pub required_bips: Vec<u32>,
    pub taproot_enabled: bool,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum BitcoinNetwork {
    Mainnet,
    Testnet,
    Signet,
    Regtest,
}

impl InstallationHandler {
    pub fn new(source: InstallationSource, bitcoin_config: BitcoinConfig) -> Result<Self> {
        source.validate()?;
        Ok(Self { source, bitcoin_config })
    }

    /// Execute installation with protocol compliance checks
    pub async fn install(&self, target_dir: &Path) -> Result<()> {
        let pb = ProgressBar::new_spinner()
            .with_style(ProgressStyle::default_spinner().template("{spinner} {msg}")?);
        
        match &self.source {
            InstallationSource::Local { path, checksum } => {
                pb.set_message("Verifying local package...");
                self.validate_checksum(path, checksum).await?;
                self.install_local(path, target_dir).await
            }
            InstallationSource::GitHubRelease { repo, version, asset } => {
                pb.set_message("Downloading from GitHub...");
                let downloaded = self.download_github(repo, version, asset).await?;
                self.install_from_archive(&downloaded, target_dir).await
            }
            InstallationSource::CustomRepository { url, package, version } => {
                pb.set_message("Fetching from custom repository...");
                self.install_from_repo(url, package, version, target_dir).await
            }
            InstallationSource::PackageRepository { name, version } => {
                pb.set_message("Installing from package repository...");
                self.install_from_package(name, version, target_dir).await
            }
            InstallationSource::EnterpriseCluster { license_key, cluster_url, psbt_contract } => {
                pb.set_message("Configuring enterprise cluster...");
                self.setup_enterprise_cluster(license_key, cluster_url, psbt_contract, target_dir).await
            }
        }?;

        pb.finish_with_message("Installation complete");
        self.post_install_checks(target_dir).await
    }

    // Implementation of each installation method follows...
    
    async fn validate_checksum(&self, path: &Path, expected: &str) -> Result<()> {
        use sha2::{Sha256, Digest};
        use std::fs::File;
        use std::io::Read;

        let mut file = File::open(path)?;
        let mut hasher = Sha256::new();
        let mut buffer = [0; 1024];

        loop {
            let count = file.read(&mut buffer)?;
            if count == 0 { break; }
            hasher.update(&buffer[..count]);
        }

        let actual = hex::encode(hasher.finalize());
        if actual != *expected {
            anyhow::bail!("Checksum mismatch: expected {}, got {}", expected, actual);
        }

        Ok(())
    }

    async fn install_local(&self, path: &Path, target: &Path) -> Result<()> {
        // Implementation for local installation
        // ...
        Ok(())
    }

    async fn download_github(&self, repo: &str, version: &str, asset: &str) -> Result<PathBuf> {
        // Implementation for GitHub download
        // ...
        Ok(PathBuf::from("/tmp/downloaded-package.tar.gz"))
    }

    async fn install_from_archive(&self, archive: &Path, target: &Path) -> Result<()> {
        // Implementation for archive extraction
        // ...
        Ok(())
    }

    async fn install_from_repo(&self, url: &str, package: &str, version: &str, target: &Path) -> Result<()> {
        // Implementation for custom repository installation
        // ...
        Ok(())
    }

    async fn install_from_package(&self, name: &str, version: &str, target: &Path) -> Result<()> {
        // Implementation for package manager installation
        // ...
        Ok(())
    }

    async fn setup_enterprise_cluster(
        &self,
        license_key: &str,
        cluster_url: &str,
        psbt_contract: &Option<PartiallySignedTransaction>,
        target: &Path
    ) -> Result<()> {
        // Enterprise-specific installation with PSBT contract validation
        if let Some(psbt) = psbt_contract {
            self.validate_psbt_contract(psbt).await?;
        }
        
        // Cluster setup logic
        // ...
        Ok(())
    }

    async fn validate_psbt_contract(&self, psbt: &PartiallySignedTransaction) -> Result<()> {
        // PSBT validation according to BIP-174
        bitcoin_protocol::validator::validate_psbt(psbt)
            .context("PSBT contract validation failed")
    }

    async fn post_install_checks(&self, target: &Path) -> Result<()> {
        // Post-installation protocol compliance checks
        self.check_bip_compliance(target).await?;
        self.check_taproot_support(target).await?;
        Ok(())
    }

    async fn check_bip_compliance(&self, target: &Path) -> Result<()> {
        // Verify installed components support required BIPs
        // ...
        Ok(())
    }

    async fn check_taproot_support(&self, target: &Path) -> Result<()> {
        // Verify Taproot support according to BIP-341
        // ...
        Ok(())
    }
}