//! # Learning Profile Example
//!
//! Demonstrates how to build and update learning profiles from execution
//! history.
//!
//! ## What This Example Shows
//! - Creating a `LearningProfile` for an agent
//! - Recording execution data with timestamps
//! - Computing task type expertise from historical data
//! - Understanding recency bias weighting
//! - Confidence scoring based on sample size
//!
//! ## Run
//! ```bash
//! cargo run --example 02-learning-profile -p vapora-agents
//! ```

use chrono::{Duration, Utc};
use vapora_agents::{ExecutionData, LearningProfile, TaskTypeExpertise};

fn main() {
    println!("=== Learning Profile Example ===\n");

    // Step 1: Create sample execution history
    let agent_id = "developer-alice".to_string();
    let now = Utc::now();

    // Simulate 30 days of execution history
    let executions: Vec<ExecutionData> = (0..30)
        .map(|i| ExecutionData {
            timestamp: now - Duration::days(i),
            duration_ms: 200 + (i as u64 * 5),
            success: i < 28, // 93% success rate (28/30 successes)
        })
        .collect();

    println!("Agent: {}", agent_id);
    println!("Historical executions: {} days", executions.len());
    println!("Success rate: {:.1}%\n", (28.0 / 30.0) * 100.0);

    // Step 2: Create learning profile
    let mut profile = LearningProfile::new(agent_id);
    println!("Created learning profile\n");

    // Step 3: Compute task type expertise
    let coding_expertise = TaskTypeExpertise::from_executions(executions.clone(), "coding");

    println!("=== Task Type Expertise: Coding ===");
    println!(
        "Success rate: {:.2}%",
        coding_expertise.success_rate * 100.0
    );
    println!("Average duration: {}ms", coding_expertise.avg_duration_ms);
    println!("Total executions: {}", coding_expertise.total_executions);
    println!("Confidence: {:.2}", coding_expertise.confidence);
    println!(
        "Recent success rate: {:.2}%",
        coding_expertise.recent_success_rate * 100.0
    );

    // Step 4: Demonstrate recency bias
    println!("\n=== Recency Bias Impact ===");
    println!("Recent 7 days: weighted 3× higher");
    println!("Days 8-30: weighted 1× normal");

    let recent_success = (6.0 / 7.0) * 100.0; // Last 7 days all successful
    let older_success = (22.0 / 23.0) * 100.0; // Days 8-30

    println!("Recent success rate (7d): {:.1}%", recent_success);
    println!("Older success rate (23d): {:.1}%", older_success);
    println!(
        "Weighted average: {:.1}%\n",
        coding_expertise.success_rate * 100.0
    );

    // Step 5: Add expertise to profile
    profile.set_task_type_expertise("coding".to_string(), coding_expertise.clone());

    // Simulate another task type with lower expertise
    let test_executions: Vec<ExecutionData> = (0..20)
        .map(|i| ExecutionData {
            timestamp: now - Duration::days(i),
            duration_ms: 150 + (i as u64 * 3),
            success: i < 16, // 80% success rate (16/20)
        })
        .collect();

    let testing_expertise = TaskTypeExpertise::from_executions(test_executions, "testing");
    profile.set_task_type_expertise("testing".to_string(), testing_expertise.clone());

    println!("=== Overall Profile ===");
    println!("Agent expertise levels:");
    println!(
        "  coding: {:.1}% (high)",
        coding_expertise.success_rate * 100.0
    );
    println!(
        "  testing: {:.1}% (medium)",
        testing_expertise.success_rate * 100.0
    );

    // Step 6: Demonstrate confidence scaling
    println!("\n=== Confidence Scaling ===");
    println!("Confidence increases with sample size:");

    let sample_sizes = vec![5, 10, 20, 50, 100];
    for size in sample_sizes {
        let confidence = ((size as f64 - 1.0) / (size as f64 + 9.0)).min(1.0);
        println!("  {} samples → confidence: {:.2}", size, confidence);
    }

    println!("\n✓ Learning profile created and ready for task assignment");
}