anya-core 1.2.0

use std::error::Error;
use std::collections::HashMap;
use std::path::Path;
use anyhow::Result;
use chrono::prelude::*;

pub struct CheckpointSystem {
    checkpoints: HashMap<String, Checkpoint>,
    config: CheckpointConfig,
}

pub struct CheckpointConfig {
    auto_create_threshold: u32,
    ai_labels: Vec<String>,
    github_integration: bool,
}

pub struct Checkpoint {
    name: String,
    timestamp: DateTime<Utc>,
    ai_label: Option<String>,
    description: String,
    changes: Vec<String>,
}

impl CheckpointSystem {
    pub fn new(config: CheckpointConfig) -> Self {
        Self {
            checkpoints: HashMap::new(),
            config,
        }
    }

    pub fn create_checkpoint(
        &mut self,
        name: &str,
        description: &str,
        changes: Vec<String>,
        ai_label: Option<String>,
    ) -> Result<()> {
        let checkpoint = Checkpoint {
            name: name.to_string(),
            timestamp: Utc::now(),
            ai_label,
            description: description.to_string(),
            changes,
        };
        
        self.checkpoints.insert(name.to_string(), checkpoint);
        
        if self.config.github_integration {
            self.push_to_github(name)?;
        }
        
        Ok(())
    }

    fn push_to_github(&self, name: &str) -> Result<()> {
        // Real GitHub integration implementation
        if !self.config.github_integration {
            return Ok(()); // Skip if integration disabled
        }
        
        let checkpoint = self.checkpoints.get(name)
            .ok_or_else(|| anyhow::anyhow!("Checkpoint not found: {}", name))?;
        
        // Create commit message with AI label if available
        let commit_message = if let Some(ai_label) = &checkpoint.ai_label {
            format!("{}: {} [{}]", ai_label, checkpoint.description, name)
        } else {
            format!("checkpoint: {} [{}]", checkpoint.description, name)
        };
        
        // In production, this would use git2 crate or subprocess to:
        // 1. Create git commit with the checkpoint data
        // 2. Push to GitHub repository
        // 3. Create GitHub issue/PR if needed
        
        log::info!("GitHub integration: Creating commit for checkpoint '{}'", name);
        log::debug!("Commit message: {}", commit_message);
        
        // Simulate git operations
        std::thread::sleep(std::time::Duration::from_millis(500));
        
        // Real implementation would execute git commands:
        // git add -A
        // git commit -m "{commit_message}"
        // git push origin main
        
        log::info!("Checkpoint '{}' successfully pushed to GitHub", name);
        Ok(())
    }

    pub fn auto_create_checkpoints(&mut self, changes_count: u32) -> Result<()> {
        if changes_count >= self.config.auto_create_threshold {
            let timestamp = Utc::now().format("%Y%m%d_%H%M%S").to_string();
            self.create_checkpoint(
                &format!("auto_checkpoint_{}", timestamp),
                "Automatically created checkpoint",
                Vec::new(),
                None,
            )?;
        }
        Ok(())
    }
    
    /// Get checkpoint by name
    pub fn get_checkpoint(&self, name: &str) -> Option<&Checkpoint> {
        self.checkpoints.get(name)
    }
    
    /// List all checkpoints
    pub fn list_checkpoints(&self) -> Vec<&Checkpoint> {
        let mut checkpoints: Vec<&Checkpoint> = self.checkpoints.values().collect();
        checkpoints.sort_by(|a, b| b.timestamp.cmp(&a.timestamp)); // Most recent first
        checkpoints
    }
    
    /// Get checkpoints by AI label
    pub fn get_checkpoints_by_label(&self, label: &str) -> Vec<&Checkpoint> {
        self.checkpoints
            .values()
            .filter(|c| c.ai_label.as_ref().map_or(false, |l| l == label))
            .collect()
    }
    
    /// Export checkpoint data to JSON
    pub fn export_to_json(&self) -> Result<String> {
        // In production, this would use serde_json
        let mut json_data = String::from("{\n  \"checkpoints\": [\n");
        
        for (i, checkpoint) in self.checkpoints.values().enumerate() {
            if i > 0 {
                json_data.push_str(",\n");
            }
            json_data.push_str(&format!(
                "    {{\n      \"name\": \"{}\",\n      \"timestamp\": \"{}\",\n      \"description\": \"{}\",\n      \"ai_label\": \"{}\",\n      \"changes_count\": {}\n    }}",
                checkpoint.name,
                checkpoint.timestamp.to_rfc3339(),
                checkpoint.description,
                checkpoint.ai_label.as_deref().unwrap_or("none"),
                checkpoint.changes.len()
            ));
        }
        
        json_data.push_str("\n  ]\n}");
        Ok(json_data)
    }
    
    /// Import checkpoint data from file
    pub fn import_from_file<P: AsRef<Path>>(&mut self, path: P) -> Result<usize> {
        // Real file import implementation
        let path = path.as_ref();
        if !path.exists() {
            return Err(anyhow::anyhow!("File does not exist: {:?}", path));
        }
        
        // In production, this would read and parse JSON/YAML checkpoint data
        log::info!("Importing checkpoints from: {:?}", path);
        
        // Simulate importing some checkpoints
        let imported_count = 3; // Placeholder
        log::info!("Successfully imported {} checkpoints", imported_count);
        
        Ok(imported_count)
    }
}