optirs_bench/ci_cd_automation/

integrations.rs

// External Service Integrations
//
// This module provides comprehensive integration capabilities with external services
// including GitHub, Slack, email, webhooks, and custom integrations for CI/CD automation.

use crate::error::{OptimError, Result};
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::time::{Duration, SystemTime};

use super::config::{
    CustomIntegrationConfig, EmailIntegration, EmailTemplateConfig, GitHubIntegration,
    GitHubLabelConfig, GitHubStatusCheckConfig, HttpMethod, IntegrationConfig, PayloadFormat,
    SlackIntegration, SlackNotificationConfig, SmtpConfig, WebhookAuth, WebhookIntegration,
    WebhookPayloadConfig, WebhookRetryConfig, WebhookTriggerConfig,
};
use super::reporting::GeneratedReport;
use super::test_execution::{CiCdTestResult, TestExecutionStatus, TestSuiteStatistics};

/// Integration manager for handling external service connections
#[derive(Debug)]
pub struct IntegrationManager {
    /// Configuration settings
    pub config: IntegrationConfig,
    /// GitHub integration client
    pub github_client: Option<GitHubClient>,
    /// Slack integration client
    pub slack_client: Option<SlackClient>,
    /// Email integration client
    pub email_client: Option<EmailClient>,
    /// Webhook clients
    pub webhook_clients: Vec<WebhookClient>,
    /// Custom integration handlers
    pub custom_integrations: HashMap<String, Box<dyn CustomIntegration>>,
    /// Integration statistics
    pub statistics: IntegrationStatistics,
}

/// GitHub integration client
#[derive(Debug, Clone)]
pub struct GitHubClient {
    /// GitHub configuration
    pub config: GitHubIntegration,
    /// HTTP client for API calls
    pub http_client: HttpClient,
    /// Rate limiter
    pub rate_limiter: RateLimiter,
}

/// Slack integration client
#[derive(Debug, Clone)]
pub struct SlackClient {
    /// Slack configuration
    pub config: SlackIntegration,
    /// HTTP client for API calls
    pub http_client: HttpClient,
}

/// Email integration client
#[derive(Debug, Clone)]
pub struct EmailClient {
    /// Email configuration
    pub config: EmailIntegration,
    /// SMTP client
    pub smtp_client: SmtpClient,
}

/// Webhook integration client
#[derive(Debug, Clone)]
pub struct WebhookClient {
    /// Webhook configuration
    pub config: WebhookIntegration,
    /// HTTP client for requests
    pub http_client: HttpClient,
    /// Retry manager
    pub retry_manager: RetryManager,
}

/// Custom integration trait
pub trait CustomIntegration: std::fmt::Debug + Send + Sync {
    /// Initialize the integration
    fn initialize(&mut self, config: &HashMap<String, String>) -> Result<()>;

    /// Send notification
    fn send_notification(&self, notification: &IntegrationNotification) -> Result<()>;

    /// Handle test results
    fn handle_test_results(
        &self,
        results: &[CiCdTestResult],
        statistics: &TestSuiteStatistics,
    ) -> Result<()>;

    /// Handle report generation
    fn handle_report_generated(&self, report: &GeneratedReport) -> Result<()>;

    /// Get integration status
    fn get_status(&self) -> IntegrationStatus;

    /// Validate configuration
    fn validate_config(&self, config: &HashMap<String, String>) -> Result<()>;
}

/// HTTP client for making API requests
#[derive(Debug, Clone)]
pub struct HttpClient {
    /// Base URL for requests
    pub base_url: String,
    /// Default headers
    pub default_headers: HashMap<String, String>,
    /// Request timeout
    pub timeout: Duration,
    /// User agent string
    pub user_agent: String,
}

/// SMTP client for sending emails
#[derive(Debug, Clone)]
pub struct SmtpClient {
    /// SMTP configuration
    pub config: SmtpConfig,
    /// Connection pool
    pub connection_pool: SmtpConnectionPool,
}

/// SMTP connection pool
#[derive(Debug, Clone)]
pub struct SmtpConnectionPool {
    /// Maximum connections
    pub max_connections: usize,
    /// Current active connections
    pub active_connections: usize,
    /// Connection timeout
    pub connection_timeout: Duration,
}

/// Rate limiter for API calls
#[derive(Debug, Clone)]
pub struct RateLimiter {
    /// Requests per minute limit
    pub requests_per_minute: u32,
    /// Current request count
    pub current_requests: u32,
    /// Reset time
    pub reset_time: SystemTime,
    /// Request history
    pub request_history: Vec<SystemTime>,
}

/// Retry manager for failed requests
#[derive(Debug, Clone)]
pub struct RetryManager {
    /// Retry configuration
    pub config: WebhookRetryConfig,
    /// Failed requests queue
    pub failed_requests: Vec<FailedRequest>,
    /// Retry statistics
    pub statistics: RetryStatistics,
}

/// Failed request information
#[derive(Debug, Clone)]
pub struct FailedRequest {
    /// Request ID
    pub id: String,
    /// Original request data
    pub request_data: RequestData,
    /// Failure timestamp
    pub failed_at: SystemTime,
    /// Number of retry attempts
    pub retry_attempts: u32,
    /// Last error message
    pub last_error: String,
    /// Next retry time
    pub next_retry_at: SystemTime,
}

/// Request data for retries
#[derive(Debug, Clone)]
pub struct RequestData {
    /// HTTP method
    pub method: HttpMethod,
    /// Request URL
    pub url: String,
    /// Request headers
    pub headers: HashMap<String, String>,
    /// Request body
    pub body: String,
}

/// Retry statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct RetryStatistics {
    /// Total retry attempts
    pub total_retries: u64,
    /// Successful retries
    pub successful_retries: u64,
    /// Failed retries
    pub failed_retries: u64,
    /// Average retry delay
    pub average_retry_delay_sec: f64,
}

/// Integration notification data
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct IntegrationNotification {
    /// Notification type
    pub notification_type: NotificationType,
    /// Notification title
    pub title: String,
    /// Notification message
    pub message: String,
    /// Notification priority
    pub priority: NotificationPriority,
    /// Additional data
    pub data: HashMap<String, String>,
    /// Timestamp
    pub timestamp: SystemTime,
}

/// Types of notifications
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
pub enum NotificationType {
    /// Test completion notification
    TestCompletion,
    /// Test failure notification
    TestFailure,
    /// Performance regression detected
    PerformanceRegression,
    /// Performance improvement detected
    PerformanceImprovement,
    /// Report generated notification
    ReportGenerated,
    /// System alert
    SystemAlert,
    /// Custom notification
    Custom(String),
}

/// Notification priority levels
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
pub enum NotificationPriority {
    /// Low priority
    Low,
    /// Normal priority
    Normal,
    /// High priority
    High,
    /// Critical priority
    Critical,
}

/// Integration status
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
pub enum IntegrationStatus {
    /// Integration is healthy
    Healthy,
    /// Integration has warnings
    Warning,
    /// Integration has errors
    Error,
    /// Integration is disabled
    Disabled,
    /// Integration is not configured
    NotConfigured,
}

/// Integration statistics
#[derive(Debug, Clone, Serialize, Deserialize, Default)]
pub struct IntegrationStatistics {
    /// GitHub statistics
    pub github: Option<GitHubStatistics>,
    /// Slack statistics
    pub slack: Option<SlackStatistics>,
    /// Email statistics
    pub email: Option<EmailStatistics>,
    /// Webhook statistics
    pub webhook: WebhookStatistics,
    /// Custom integration statistics
    pub custom: HashMap<String, CustomIntegrationStatistics>,
}

/// GitHub integration statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct GitHubStatistics {
    /// Status checks created
    pub status_checks_created: u64,
    /// PR comments created
    pub pr_comments_created: u64,
    /// Issues created
    pub issues_created: u64,
    /// API requests made
    pub api_requests: u64,
    /// Rate limit hits
    pub rate_limit_hits: u64,
    /// Last activity timestamp
    pub last_activity: Option<SystemTime>,
}

/// Slack integration statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SlackStatistics {
    /// Messages sent
    pub messages_sent: u64,
    /// Files uploaded
    pub files_uploaded: u64,
    /// Channels used
    pub channels_used: Vec<String>,
    /// Last activity timestamp
    pub last_activity: Option<SystemTime>,
}

/// Email integration statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EmailStatistics {
    /// Emails sent
    pub emails_sent: u64,
    /// Emails failed
    pub emails_failed: u64,
    /// Recipients contacted
    pub recipients_contacted: Vec<String>,
    /// Last activity timestamp
    pub last_activity: Option<SystemTime>,
}

/// Webhook integration statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct WebhookStatistics {
    /// Requests sent
    pub requests_sent: u64,
    /// Requests successful
    pub requests_successful: u64,
    /// Requests failed
    pub requests_failed: u64,
    /// Average response time
    pub average_response_time_ms: f64,
    /// Retry statistics
    pub retry_stats: RetryStatistics,
}

/// Custom integration statistics
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CustomIntegrationStatistics {
    /// Integration name
    pub name: String,
    /// Operations performed
    pub operations_performed: u64,
    /// Operations successful
    pub operations_successful: u64,
    /// Operations failed
    pub operations_failed: u64,
    /// Last activity timestamp
    pub last_activity: Option<SystemTime>,
}

/// GitHub API response types
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct GitHubStatusCheckResponse {
    /// Status check ID
    pub id: u64,
    /// Status state
    pub state: String,
    /// Status description
    pub description: String,
    /// Target URL
    pub target_url: Option<String>,
}

/// GitHub PR comment response
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct GitHubCommentResponse {
    /// Comment ID
    pub id: u64,
    /// Comment body
    pub body: String,
    /// Comment URL
    pub html_url: String,
    /// Creation timestamp
    pub created_at: String,
}

/// GitHub issue response
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct GitHubIssueResponse {
    /// Issue ID
    pub id: u64,
    /// Issue number
    pub number: u64,
    /// Issue title
    pub title: String,
    /// Issue URL
    pub html_url: String,
    /// Issue state
    pub state: String,
}

/// Slack message response
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SlackMessageResponse {
    /// Success status
    pub ok: bool,
    /// Message timestamp
    pub ts: Option<String>,
    /// Channel ID
    pub channel: Option<String>,
    /// Error message
    pub error: Option<String>,
}

impl IntegrationManager {
    /// Create a new integration manager
    pub fn new(config: IntegrationConfig) -> Result<Self> {
        let mut manager = Self {
            config: config.clone(),
            github_client: None,
            slack_client: None,
            email_client: None,
            webhook_clients: Vec::new(),
            custom_integrations: HashMap::new(),
            statistics: IntegrationStatistics::default(),
        };

        manager.initialize_integrations()?;
        Ok(manager)
    }

    /// Initialize all configured integrations
    fn initialize_integrations(&mut self) -> Result<()> {
        // Initialize GitHub integration
        if let Some(github_config) = &self.config.github {
            self.github_client = Some(GitHubClient::new(github_config.clone())?);
        }

        // Initialize Slack integration
        if let Some(slack_config) = &self.config.slack {
            self.slack_client = Some(SlackClient::new(slack_config.clone())?);
        }

        // Initialize Email integration
        if let Some(email_config) = &self.config.email {
            self.email_client = Some(EmailClient::new(email_config.clone())?);
        }

        // Initialize Webhook integrations
        for webhook_config in &self.config.webhooks {
            let client = WebhookClient::new(webhook_config.clone())?;
            self.webhook_clients.push(client);
        }

        // Initialize custom integrations
        for (name, custom_config) in &self.config.custom {
            // In a real implementation, this would load custom integration plugins
            // For now, we'll just validate the configuration
            if custom_config.enabled {
                // Custom integration initialization would go here
            }
        }

        Ok(())
    }

    /// Send notification to all configured integrations
    pub fn send_notification(&mut self, notification: &IntegrationNotification) -> Result<()> {
        // Send to GitHub
        if self.should_send_to_github(&notification.notification_type) {
            if let Some(github_client) = &mut self.github_client {
                github_client.send_notification(notification)?;
            }
        }

        // Send to Slack
        if self.should_send_to_slack(&notification.notification_type) {
            if let Some(slack_client) = &mut self.slack_client {
                slack_client.send_notification(notification)?;
            }
        }

        // Send to Email
        if self.should_send_to_email(&notification.notification_type) {
            if let Some(email_client) = &mut self.email_client {
                email_client.send_notification(notification)?;
            }
        }

        // Send to Webhooks
        for webhook_client in &mut self.webhook_clients {
            if webhook_client.should_trigger(&notification.notification_type) {
                webhook_client.send_notification(notification)?;
            }
        }

        // Send to custom integrations
        for (name, integration) in &self.custom_integrations {
            integration.send_notification(notification)?;
        }

        Ok(())
    }

    /// Handle test completion
    pub fn handle_test_completion(
        &mut self,
        results: &[CiCdTestResult],
        statistics: &TestSuiteStatistics,
    ) -> Result<()> {
        let notification_type = if statistics.failed > 0 {
            NotificationType::TestFailure
        } else {
            NotificationType::TestCompletion
        };

        let priority = if statistics.failed > 0 {
            NotificationPriority::High
        } else {
            NotificationPriority::Normal
        };

        let notification = IntegrationNotification {
            notification_type,
            title: format!(
                "Test Suite Completed: {}/{} Passed",
                statistics.passed, statistics.total_tests
            ),
            message: self.create_test_summary_message(results, statistics),
            priority,
            data: self.create_test_data_map(statistics),
            timestamp: SystemTime::now(),
        };

        self.send_notification(&notification)?;

        // Handle custom integration callbacks
        for integration in self.custom_integrations.values() {
            integration.handle_test_results(results, statistics)?;
        }

        Ok(())
    }

    /// Handle report generation
    pub fn handle_report_generated(&mut self, report: &GeneratedReport) -> Result<()> {
        let notification = IntegrationNotification {
            notification_type: NotificationType::ReportGenerated,
            title: format!("Performance Report Generated: {:?}", report.report_type),
            message: format!("Report available at: {:?}", report.file_path),
            priority: NotificationPriority::Normal,
            data: HashMap::new(),
            timestamp: SystemTime::now(),
        };

        self.send_notification(&notification)?;

        // Handle custom integration callbacks
        for integration in self.custom_integrations.values() {
            integration.handle_report_generated(report)?;
        }

        Ok(())
    }

    /// Get overall integration health status
    pub fn get_health_status(&self) -> IntegrationStatus {
        let mut has_errors = false;
        let mut has_warnings = false;

        // Check GitHub status
        if let Some(github_client) = &self.github_client {
            match github_client.get_health_status() {
                IntegrationStatus::Error => has_errors = true,
                IntegrationStatus::Warning => has_warnings = true,
                _ => {}
            }
        }

        // Check Slack status
        if let Some(slack_client) = &self.slack_client {
            match slack_client.get_health_status() {
                IntegrationStatus::Error => has_errors = true,
                IntegrationStatus::Warning => has_warnings = true,
                _ => {}
            }
        }

        // Check Email status
        if let Some(email_client) = &self.email_client {
            match email_client.get_health_status() {
                IntegrationStatus::Error => has_errors = true,
                IntegrationStatus::Warning => has_warnings = true,
                _ => {}
            }
        }

        // Check webhook statuses
        for webhook_client in &self.webhook_clients {
            match webhook_client.get_health_status() {
                IntegrationStatus::Error => has_errors = true,
                IntegrationStatus::Warning => has_warnings = true,
                _ => {}
            }
        }

        // Check custom integration statuses
        for integration in self.custom_integrations.values() {
            match integration.get_status() {
                IntegrationStatus::Error => has_errors = true,
                IntegrationStatus::Warning => has_warnings = true,
                _ => {}
            }
        }

        if has_errors {
            IntegrationStatus::Error
        } else if has_warnings {
            IntegrationStatus::Warning
        } else {
            IntegrationStatus::Healthy
        }
    }

    /// Determine if notification should be sent to GitHub
    fn should_send_to_github(&self, notification_type: &NotificationType) -> bool {
        if let Some(github_config) = &self.config.github {
            match notification_type {
                NotificationType::TestCompletion | NotificationType::TestFailure => {
                    github_config.create_status_checks || github_config.create_pr_comments
                }
                NotificationType::PerformanceRegression => github_config.create_regression_issues,
                _ => false,
            }
        } else {
            false
        }
    }

    /// Determine if notification should be sent to Slack
    fn should_send_to_slack(&self, notification_type: &NotificationType) -> bool {
        if let Some(slack_config) = &self.config.slack {
            match notification_type {
                NotificationType::TestCompletion => slack_config.notifications.notify_on_completion,
                NotificationType::TestFailure => slack_config.notifications.notify_on_failure,
                NotificationType::PerformanceRegression => {
                    slack_config.notifications.notify_on_regression
                }
                NotificationType::PerformanceImprovement => {
                    slack_config.notifications.notify_on_improvement
                }
                _ => true, // Send other notifications by default
            }
        } else {
            false
        }
    }

    /// Determine if notification should be sent to Email
    fn should_send_to_email(&self, notification_type: &NotificationType) -> bool {
        // For simplicity, send high and critical priority notifications via email
        matches!(
            notification_type,
            NotificationType::TestFailure
                | NotificationType::PerformanceRegression
                | NotificationType::SystemAlert
        )
    }

    /// Create test summary message
    fn create_test_summary_message(
        &self,
        results: &[CiCdTestResult],
        statistics: &TestSuiteStatistics,
    ) -> String {
        let mut message = format!(
            "Test Suite Results:\n• Total: {}\n• Passed: {}\n• Failed: {}\n• Skipped: {}\n• Success Rate: {:.1}%\n",
            statistics.total_tests,
            statistics.passed,
            statistics.failed,
            statistics.skipped,
            statistics.success_rate * 100.0
        );

        if statistics.failed > 0 {
            message.push_str("\nFailed Tests:\n");
            for result in results
                .iter()
                .filter(|r| r.status == TestExecutionStatus::Failed)
                .take(5)
            {
                message.push_str(&format!("• {}\n", result.test_name));
            }
            if statistics.failed > 5 {
                message.push_str(&format!("• ... and {} more\n", statistics.failed - 5));
            }
        }

        message
    }

    /// Create test data map for notification
    fn create_test_data_map(&self, statistics: &TestSuiteStatistics) -> HashMap<String, String> {
        let mut data = HashMap::new();
        data.insert(
            "total_tests".to_string(),
            statistics.total_tests.to_string(),
        );
        data.insert("passed_tests".to_string(), statistics.passed.to_string());
        data.insert("failed_tests".to_string(), statistics.failed.to_string());
        data.insert("skipped_tests".to_string(), statistics.skipped.to_string());
        data.insert(
            "success_rate".to_string(),
            format!("{:.1}", statistics.success_rate * 100.0),
        );
        data.insert(
            "duration_seconds".to_string(),
            statistics.total_duration.as_secs().to_string(),
        );
        data
    }
}

impl GitHubClient {
    /// Create a new GitHub client
    pub fn new(config: GitHubIntegration) -> Result<Self> {
        let http_client = HttpClient::new("https://api.github.com".to_string())?;
        let rate_limiter = RateLimiter::new(5000); // GitHub allows 5000 requests per hour

        Ok(Self {
            config,
            http_client,
            rate_limiter,
        })
    }

    /// Send notification to GitHub
    pub fn send_notification(&mut self, notification: &IntegrationNotification) -> Result<()> {
        match &notification.notification_type {
            NotificationType::TestCompletion | NotificationType::TestFailure => {
                if self.config.create_status_checks {
                    self.create_status_check(notification)?;
                }
                if self.config.create_pr_comments {
                    self.create_pr_comment(notification)?;
                }
            }
            NotificationType::PerformanceRegression => {
                if self.config.create_regression_issues {
                    self.create_issue(notification)?;
                }
            }
            _ => {}
        }

        Ok(())
    }

    /// Create status check
    fn create_status_check(&mut self, notification: &IntegrationNotification) -> Result<()> {
        let state = match &notification.notification_type {
            NotificationType::TestCompletion => "success",
            NotificationType::TestFailure => "failure",
            _ => "pending",
        };

        let payload = serde_json::json!({
            "state": state,
            "description": &notification.message,
            "context": self.config.status_checks.context
        });

        // In a real implementation, this would make an actual HTTP request to GitHub API
        println!("GitHub Status Check: {}", payload);
        Ok(())
    }

    /// Create PR comment
    fn create_pr_comment(&mut self, notification: &IntegrationNotification) -> Result<()> {
        let comment_body = format!("## {}\n\n{}", notification.title, notification.message);

        let payload = serde_json::json!({
            "body": comment_body
        });

        // In a real implementation, this would make an actual HTTP request to GitHub API
        println!("GitHub PR Comment: {}", payload);
        Ok(())
    }

    /// Create issue
    fn create_issue(&mut self, notification: &IntegrationNotification) -> Result<()> {
        let payload = serde_json::json!({
            "title": &notification.title,
            "body": &notification.message,
            "labels": [self.config.labels.performance_regression]
        });

        // In a real implementation, this would make an actual HTTP request to GitHub API
        println!("GitHub Issue: {}", payload);
        Ok(())
    }

    /// Get health status
    pub fn get_health_status(&self) -> IntegrationStatus {
        // In a real implementation, this would check API connectivity
        IntegrationStatus::Healthy
    }
}

impl SlackClient {
    /// Create a new Slack client
    pub fn new(config: SlackIntegration) -> Result<Self> {
        let http_client = HttpClient::new("https://hooks.slack.com".to_string())?;

        Ok(Self {
            config,
            http_client,
        })
    }

    /// Send notification to Slack
    pub fn send_notification(&mut self, notification: &IntegrationNotification) -> Result<()> {
        let color = match notification.priority {
            NotificationPriority::Critical => "#FF0000",
            NotificationPriority::High => "#FF8C00",
            NotificationPriority::Normal => "#36A64F",
            NotificationPriority::Low => "#808080",
        };

        let payload = serde_json::json!({
            "channel": self.config.default_channel,
            "username": self.config.username.as_deref().unwrap_or("CI/CD Bot"),
            "icon_emoji": self.config.icon_emoji.as_deref().unwrap_or(":robot_face:"),
            "attachments": [{
                "color": color,
                "title": &notification.title,
                "text": &notification.message,
                "timestamp": notification.timestamp.duration_since(SystemTime::UNIX_EPOCH)
                    .unwrap_or_default().as_secs()
            }]
        });

        // In a real implementation, this would make an actual HTTP request to Slack API
        println!("Slack Message: {}", payload);
        Ok(())
    }

    /// Get health status
    pub fn get_health_status(&self) -> IntegrationStatus {
        // In a real implementation, this would check webhook connectivity
        IntegrationStatus::Healthy
    }
}

impl EmailClient {
    /// Create a new email client
    pub fn new(config: EmailIntegration) -> Result<Self> {
        let smtp_client = SmtpClient::new(config.smtp.clone())?;

        Ok(Self {
            config,
            smtp_client,
        })
    }

    /// Send notification via email
    pub fn send_notification(&mut self, notification: &IntegrationNotification) -> Result<()> {
        let subject = match notification.priority {
            NotificationPriority::Critical => format!("[CRITICAL] {}", notification.title),
            NotificationPriority::High => format!("[HIGH] {}", notification.title),
            _ => notification.title.clone(),
        };

        let body = if self.config.templates.use_html {
            self.create_html_email(&notification.message)
        } else {
            notification.message.clone()
        };

        // In a real implementation, this would send actual emails
        println!("Email - Subject: {}, Body: {}", subject, body);
        Ok(())
    }

    /// Create HTML email body
    fn create_html_email(&self, message: &str) -> String {
        format!(
            r#"<!DOCTYPE html>
<html>
<head><title>CI/CD Notification</title></head>
<body>
<div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto;">
<h2>CI/CD Automation Notification</h2>
<p>{}</p>
<hr>
<p><small>This is an automated message from the CI/CD system.</small></p>
</div>
</body>
</html>"#,
            message.replace('\n', "<br>")
        )
    }

    /// Get health status
    pub fn get_health_status(&self) -> IntegrationStatus {
        // In a real implementation, this would check SMTP connectivity
        IntegrationStatus::Healthy
    }
}

impl WebhookClient {
    /// Create a new webhook client
    pub fn new(config: WebhookIntegration) -> Result<Self> {
        let http_client = HttpClient::new(config.url.clone())?;
        let retry_manager = RetryManager::new(config.payload.clone().into());

        Ok(Self {
            config,
            http_client,
            retry_manager,
        })
    }

    /// Check if webhook should trigger for notification type
    pub fn should_trigger(&self, notification_type: &NotificationType) -> bool {
        match notification_type {
            NotificationType::TestCompletion => self.config.triggers.on_completion,
            NotificationType::TestFailure => self.config.triggers.on_failure,
            NotificationType::PerformanceRegression => self.config.triggers.on_regression,
            NotificationType::PerformanceImprovement => self.config.triggers.on_improvement,
            _ => false,
        }
    }

    /// Send notification via webhook
    pub fn send_notification(&mut self, notification: &IntegrationNotification) -> Result<()> {
        let payload = self.create_webhook_payload(notification)?;

        // In a real implementation, this would make an actual HTTP request
        println!("Webhook {} - Payload: {}", self.config.name, payload);
        Ok(())
    }

    /// Create webhook payload
    fn create_webhook_payload(&self, notification: &IntegrationNotification) -> Result<String> {
        match self.config.payload.format {
            PayloadFormat::JSON => {
                let payload = serde_json::json!({
                    "type": format!("{:?}", notification.notification_type),
                    "title": notification.title,
                    "message": notification.message,
                    "priority": format!("{:?}", notification.priority),
                    "timestamp": notification.timestamp.duration_since(SystemTime::UNIX_EPOCH)
                        .unwrap_or_default().as_secs(),
                    "data": notification.data
                });
                Ok(serde_json::to_string(&payload)?)
            }
            PayloadFormat::XML => Ok(format!(
                r#"<?xml version="1.0"?>
<notification>
    <type>{:?}</type>
    <title>{}</title>
    <message>{}</message>
    <priority>{:?}</priority>
    <timestamp>{}</timestamp>
</notification>"#,
                notification.notification_type,
                notification.title,
                notification.message,
                notification.priority,
                notification
                    .timestamp
                    .duration_since(SystemTime::UNIX_EPOCH)
                    .unwrap_or_default()
                    .as_secs()
            )),
            _ => Ok(notification.message.clone()),
        }
    }

    /// Get health status
    pub fn get_health_status(&self) -> IntegrationStatus {
        // In a real implementation, this would check webhook endpoint connectivity
        IntegrationStatus::Healthy
    }
}

impl HttpClient {
    /// Create a new HTTP client
    pub fn new(base_url: String) -> Result<Self> {
        Ok(Self {
            base_url,
            default_headers: HashMap::new(),
            timeout: Duration::from_secs(30),
            user_agent: "CI/CD-Automation/1.0".to_string(),
        })
    }

    /// Make HTTP request
    pub fn request(&self, method: &HttpMethod, path: &str, body: Option<String>) -> Result<String> {
        // In a real implementation, this would make actual HTTP requests
        println!("HTTP Request: {:?} {}{}", method, self.base_url, path);
        if let Some(body) = body {
            println!("Body: {}", body);
        }
        Ok("success".to_string())
    }
}

impl SmtpClient {
    /// Create a new SMTP client
    pub fn new(config: SmtpConfig) -> Result<Self> {
        Ok(Self {
            config,
            connection_pool: SmtpConnectionPool {
                max_connections: 5,
                active_connections: 0,
                connection_timeout: Duration::from_secs(30),
            },
        })
    }

    /// Send email
    pub fn send_email(&self, to: &[String], subject: &str, body: &str) -> Result<()> {
        // In a real implementation, this would send actual emails via SMTP
        println!("SMTP Email - To: {:?}, Subject: {}", to, subject);
        Ok(())
    }
}

impl RateLimiter {
    /// Create a new rate limiter
    pub fn new(requests_per_minute: u32) -> Self {
        Self {
            requests_per_minute,
            current_requests: 0,
            reset_time: SystemTime::now() + Duration::from_secs(60),
            request_history: Vec::new(),
        }
    }

    /// Check if request is allowed
    pub fn is_allowed(&mut self) -> bool {
        let now = SystemTime::now();

        // Reset if time window has passed
        if now >= self.reset_time {
            self.current_requests = 0;
            self.reset_time = now + Duration::from_secs(60);
            self.request_history.clear();
        }

        // Check if under limit
        if self.current_requests < self.requests_per_minute {
            self.current_requests += 1;
            self.request_history.push(now);
            true
        } else {
            false
        }
    }
}

impl RetryManager {
    /// Create a new retry manager
    pub fn new(config: WebhookRetryConfig) -> Self {
        Self {
            config,
            failed_requests: Vec::new(),
            statistics: RetryStatistics::default(),
        }
    }

    /// Add failed request for retry
    pub fn add_failed_request(&mut self, request_data: RequestData, error: String) {
        let failed_request = FailedRequest {
            id: uuid::Uuid::new_v4().to_string(),
            request_data,
            failed_at: SystemTime::now(),
            retry_attempts: 0,
            last_error: error,
            next_retry_at: SystemTime::now() + Duration::from_secs(self.config.initial_delay_sec),
        };

        self.failed_requests.push(failed_request);
    }

    /// Process retry queue
    pub fn process_retries(&mut self) -> Result<()> {
        let now = SystemTime::now();
        let mut completed_retries = Vec::new();

        for (index, failed_request) in self.failed_requests.iter_mut().enumerate() {
            if now >= failed_request.next_retry_at
                && failed_request.retry_attempts < self.config.max_retries
            {
                // Attempt retry
                // In a real implementation, this would make the actual request
                println!("Retrying request: {}", failed_request.id);

                failed_request.retry_attempts += 1;
                self.statistics.total_retries += 1;

                // Calculate next retry time with exponential backoff
                let delay = self.config.initial_delay_sec as f64
                    * self
                        .config
                        .backoff_multiplier
                        .powi(failed_request.retry_attempts as i32);
                let delay = delay.min(self.config.max_delay_sec as f64) as u64;

                failed_request.next_retry_at = now + Duration::from_secs(delay);

                // Simulate success for demonstration
                if failed_request.retry_attempts >= 2 {
                    self.statistics.successful_retries += 1;
                    completed_retries.push(index);
                }
            } else if failed_request.retry_attempts >= self.config.max_retries {
                self.statistics.failed_retries += 1;
                completed_retries.push(index);
            }
        }

        // Remove completed retries (in reverse order to maintain indices)
        for &index in completed_retries.iter().rev() {
            self.failed_requests.remove(index);
        }

        Ok(())
    }
}

// Default implementations

impl Default for WebhookStatistics {
    fn default() -> Self {
        Self {
            requests_sent: 0,
            requests_successful: 0,
            requests_failed: 0,
            average_response_time_ms: 0.0,
            retry_stats: RetryStatistics::default(),
        }
    }
}

impl Default for RetryStatistics {
    fn default() -> Self {
        Self {
            total_retries: 0,
            successful_retries: 0,
            failed_retries: 0,
            average_retry_delay_sec: 0.0,
        }
    }
}

impl From<WebhookPayloadConfig> for WebhookRetryConfig {
    fn from(_payload_config: WebhookPayloadConfig) -> Self {
        Self {
            max_retries: 3,
            initial_delay_sec: 5,
            backoff_multiplier: 2.0,
            max_delay_sec: 300,
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_notification_creation() {
        let notification = IntegrationNotification {
            notification_type: NotificationType::TestCompletion,
            title: "Tests Completed".to_string(),
            message: "All tests passed successfully".to_string(),
            priority: NotificationPriority::Normal,
            data: HashMap::new(),
            timestamp: SystemTime::now(),
        };

        assert_eq!(
            notification.notification_type,
            NotificationType::TestCompletion
        );
        assert_eq!(notification.priority, NotificationPriority::Normal);
    }

    #[test]
    fn test_rate_limiter() {
        let mut limiter = RateLimiter::new(5);

        // Should allow first 5 requests
        for _ in 0..5 {
            assert!(limiter.is_allowed());
        }

        // Should deny 6th request
        assert!(!limiter.is_allowed());
    }

    #[test]
    fn test_integration_status() {
        assert!(IntegrationStatus::Healthy < IntegrationStatus::Warning);
        assert!(IntegrationStatus::Warning < IntegrationStatus::Error);
    }

    #[test]
    fn test_notification_priority() {
        assert!(NotificationPriority::Low < NotificationPriority::Normal);
        assert!(NotificationPriority::Normal < NotificationPriority::High);
        assert!(NotificationPriority::High < NotificationPriority::Critical);
    }

    #[test]
    fn test_webhook_payload_format() {
        let notification = IntegrationNotification {
            notification_type: NotificationType::TestCompletion,
            title: "Test".to_string(),
            message: "Test message".to_string(),
            priority: NotificationPriority::Normal,
            data: HashMap::new(),
            timestamp: SystemTime::now(),
        };

        // Test that we can create webhook clients
        let webhook_config = WebhookIntegration {
            name: "test".to_string(),
            url: "https://example.com/webhook".to_string(),
            method: HttpMethod::POST,
            headers: HashMap::new(),
            auth: None,
            triggers: WebhookTriggerConfig {
                on_completion: true,
                on_regression: false,
                on_failure: false,
                on_improvement: false,
                custom_conditions: Vec::new(),
            },
            payload: WebhookPayloadConfig {
                format: PayloadFormat::JSON,
                include_results: true,
                include_metrics: true,
                include_environment: false,
                custom_template: None,
            },
        };

        let client = WebhookClient::new(webhook_config);
        assert!(client.is_ok());
    }
}