//! Debug event command - inspect and analyze events

use colored::Colorize;
use serde_json::json;

use crate::error::Result;

/// Execute debug-event command.
///
/// # Errors
///
/// Returns an error if the output format serialization fails.
#[allow(clippy::unused_async)] // Reason: trait/interface requires async signature
pub async fn execute(
    format: crate::cli::OutputFormat,
    _event_id: Option<String>,
    _history: Option<usize>,
    _entity_type: Option<String>,
    _kind: Option<String>,
) -> Result<()> {
    // In a real implementation, this would:
    // 1. Query event store or cache
    // 2. Display event details with condition evaluation
    // 3. Show which observers matched
    // 4. Display action execution results

    let event_info = json!({
        "event_id": "evt-12345",
        "entity_type": "Order",
        "entity_id": "00000000-0000-0000-0000-000000000001",
        "kind": "created",
        "timestamp": "2026-01-22T12:00:00Z",
        "data": {
            "id": "00000000-0000-0000-0000-000000000001",
            "status": "new",
            "total": 250.00,
            "customer_id": "cust-123"
        },
        "matched_observers": [
            {
                "observer_id": "obs-email-notifier",
                "name": "Email Order Notification",
                "condition_result": true,
                "condition_expression": "status == 'new'",
                "actions": [
                    {
                        "action_id": "act-1",
                        "type": "email",
                        "status": "success",
                        "duration_ms": 150
                    }
                ]
            },
            {
                "observer_id": "obs-webhook-logger",
                "name": "Webhook Order Logger",
                "condition_result": true,
                "condition_expression": "total > 100",
                "actions": [
                    {
                        "action_id": "act-2",
                        "type": "webhook",
                        "status": "success",
                        "duration_ms": 85
                    }
                ]
            }
        ],
        "unmatched_observers": [
            {
                "observer_id": "obs-high-value",
                "name": "High Value Order Handler",
                "condition_result": false,
                "condition_expression": "total > 1000",
                "reason": "Condition false"
            }
        ]
    });

    match format {
        crate::cli::OutputFormat::Json => {
            let json_str =
                serde_json::to_string_pretty(&event_info).unwrap_or_else(|_| "{}".to_string());
            println!("{json_str}");
        },
        crate::cli::OutputFormat::Text => {
            println!("{}", "Event Details".bold().underline());
            println!(
                "\n{}: {}",
                "Event ID".cyan(),
                event_info["event_id"].as_str().unwrap_or("unknown")
            );
            println!(
                "{}: {} ({})",
                "Entity".cyan(),
                event_info["entity_type"].as_str().unwrap_or("unknown"),
                event_info["entity_id"].as_str().unwrap_or("unknown").bright_black()
            );
            println!(
                "{}: {}",
                "Kind".cyan(),
                event_info["kind"].as_str().unwrap_or("unknown").yellow()
            );
            println!(
                "{}: {}",
                "Timestamp".cyan(),
                event_info["timestamp"].as_str().unwrap_or("unknown").bright_black()
            );

            println!("\n{}", "Data:".bold());
            if let Some(data) = event_info["data"].as_object() {
                for (key, value) in data {
                    println!("  {}: {}", key.cyan(), value);
                }
            }

            println!("\n{}", "Matched Observers:".bold().green());
            if let Some(matched) = event_info["matched_observers"].as_array() {
                for (idx, obs) in matched.iter().enumerate() {
                    let obs_name = obs["name"].as_str().unwrap_or("unknown");
                    let condition_result = obs["condition_result"].as_bool().unwrap_or(false);
                    println!(
                        "  {}. {} {}",
                        idx + 1,
                        obs_name.cyan(),
                        if condition_result {
                            "✓".green()
                        } else {
                            "✗".red()
                        }
                    );

                    if let Some(actions) = obs["actions"].as_array() {
                        for (aidx, action) in actions.iter().enumerate() {
                            let action_type = action["type"].as_str().unwrap_or("unknown");
                            let status = action["status"].as_str().unwrap_or("unknown");
                            let duration = action["duration_ms"].as_u64().unwrap_or(0);

                            println!(
                                "     {}: {} [{}ms] {}",
                                aidx + 1,
                                action_type.yellow(),
                                duration,
                                if status == "success" {
                                    "✓".green()
                                } else {
                                    "✗".red()
                                }
                            );
                        }
                    }
                }
            }

            println!("\n{}", "Unmatched Observers:".bold().yellow());
            if let Some(unmatched) = event_info["unmatched_observers"].as_array() {
                for (idx, obs) in unmatched.iter().enumerate() {
                    let obs_name = obs["name"].as_str().unwrap_or("unknown");
                    let reason = obs["reason"].as_str().unwrap_or("unknown");
                    println!("  {}. {} ({})", idx + 1, obs_name.cyan(), reason.bright_black());
                }
            }
        },
    }

    Ok(())
}
