anya-core 1.2.0

use anyhow::Result;
use std::cmp::Ordering;
use std::path::{Path, PathBuf};

/// Installation source configuration
#[derive(Debug, Clone)]
pub enum InstallationSource {
    LocalBuild,
    GitRepository(String),
    PreBuiltBinary(String),
}

/// Bitcoin configuration for installation
#[derive(Debug, Clone)]
pub struct BitcoinConfig {
    pub network: String,
    pub data_dir: PathBuf,
}

/// Main installer implementation
pub struct AnyaInstaller {
    installation_source: InstallationSource,
    #[allow(dead_code)]
    // Required for future Bitcoin config extensibility (see docs/INDEX_CORRECTED.md)
    bitcoin_config: BitcoinConfig,
}

impl AnyaInstaller {
    pub fn new(install_source: InstallationSource, bitcoin_config: BitcoinConfig) -> Result<Self> {
        Ok(Self {
            installation_source: install_source,
            bitcoin_config,
        })
    }

    /// Execute full installation process
    pub async fn install(&self, target_dir: PathBuf) -> Result<()> {
        // Phase 1: Source validation
        self.validate_source()?;

        // Phase 2: Installation execution
        self.execute_installation(&target_dir).await?;

        Ok(())
    }

    fn validate_source(&self) -> Result<()> {
        match &self.installation_source {
            InstallationSource::LocalBuild => {
                // Validate local build environment
                Ok(())
            }
            InstallationSource::GitRepository(url) => {
                // Validate git repository access
                if url.is_empty() {
                    anyhow::bail!("Git repository URL cannot be empty");
                }
                Ok(())
            }
            InstallationSource::PreBuiltBinary(path) => {
                // Validate binary path
                if path.is_empty() {
                    anyhow::bail!("Binary path cannot be empty");
                }
                Ok(())
            }
        }
    }

    async fn execute_installation(&self, _target_dir: &Path) -> Result<()> {
        // Implementation placeholder for installation logic
        Ok(())
    }
}

/// Protocol version checker
pub mod protocol {
    use super::*;

    pub fn verify_bip_support(required_bips: &[u32], installed_bips: &[u32]) -> Result<()> {
        let missing: Vec<_> = required_bips
            .iter()
            .filter(|bip| !installed_bips.contains(bip))
            .collect();

        if !missing.is_empty() {
            anyhow::bail!("Missing required BIPs: {:?}", missing);
        }

        Ok(())
    }

    pub fn check_taproot_activation(height: u64) -> Result<()> {
        const TAPROOT_ACTIVATION_HEIGHT: u64 = 709632; // Mainnet activation

        if height < TAPROOT_ACTIVATION_HEIGHT {
            anyhow::bail!(
                "Taproot not active until block {}",
                TAPROOT_ACTIVATION_HEIGHT
            );
        }

        Ok(())
    }
}

/// Version comparison utility for installation packages
pub fn version_compare(v1: &str, v2: &str) -> Ordering {
    // Simple version comparison - would use a proper semver library in production
    v1.cmp(v2)
}