use caldav_sync::{Config, CalDavResult};

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

    #[test]
    fn test_default_config() -> CalDavResult<()> {
        let config = Config::default();
        assert_eq!(config.server.url, "https://caldav.example.com");
        assert_eq!(config.calendar.name, "calendar");
        assert_eq!(config.sync.interval, 300);
        config.validate()?;
        Ok(())
    }

    #[test]
    fn test_config_validation() -> CalDavResult<()> {
        let mut config = Config::default();
        
        // Should fail with empty credentials
        assert!(config.validate().is_err());
        
        config.server.username = "test_user".to_string();
        config.server.password = "test_pass".to_string();
        
        // Should succeed now
        assert!(config.validate().is_ok());
        Ok(())
    }
}

#[cfg(test)]
mod error_tests {
    use caldav_sync::{CalDavError, CalDavResult};

    #[test]
    fn test_error_retryable() {
        let network_error = CalDavError::Network(
            reqwest::Error::from(std::io::Error::new(std::io::ErrorKind::ConnectionRefused, "test"))
        );
        assert!(network_error.is_retryable());

        let auth_error = CalDavError::Authentication("Invalid credentials".to_string());
        assert!(!auth_error.is_retryable());

        let config_error = CalDavError::Config("Missing URL".to_string());
        assert!(!config_error.is_retryable());
    }

    #[test]
    fn test_error_classification() {
        let auth_error = CalDavError::Authentication("Invalid".to_string());
        assert!(auth_error.is_auth_error());

        let config_error = CalDavError::Config("Invalid".to_string());
        assert!(config_error.is_config_error());
    }
}

#[cfg(test)]
mod event_tests {
    use caldav_sync::event::{Event, EventStatus, EventType};
    use chrono::{DateTime, Utc, NaiveDate};

    #[test]
    fn test_event_creation() {
        let start = Utc::now();
        let end = start + chrono::Duration::hours(1);
        let event = Event::new("Test Event".to_string(), start, end);
        
        assert_eq!(event.summary, "Test Event");
        assert_eq!(event.start, start);
        assert_eq!(event.end, end);
        assert!(!event.all_day);
        assert_eq!(event.status, EventStatus::Confirmed);
        assert_eq!(event.event_type, EventType::Public);
    }

    #[test]
    fn test_all_day_event() {
        let date = NaiveDate::from_ymd_opt(2023, 12, 25).unwrap();
        let event = Event::new_all_day("Christmas".to_string(), date);
        
        assert_eq!(event.summary, "Christmas");
        assert!(event.all_day);
        assert!(event.occurs_on(date));
    }

    #[test]
    fn test_event_to_ical() -> caldav_sync::CalDavResult<()> {
        let event = Event::new(
            "Meeting".to_string(),
            DateTime::from_naive_utc_and_offset(
                chrono::NaiveDateTime::parse_from_str("20231225T100000", "%Y%m%dT%H%M%S").unwrap(),
                Utc
            ),
            DateTime::from_naive_utc_and_offset(
                chrono::NaiveDateTime::parse_from_str("20231225T110000", "%Y%m%dT%H%M%S").unwrap(),
                Utc
            ),
        );
        
        let ical = event.to_ical()?;
        assert!(ical.contains("SUMMARY:Meeting"));
        assert!(ical.contains("DTSTART:20231225T100000Z"));
        assert!(ical.contains("DTEND:20231225T110000Z"));
        assert!(ical.contains("BEGIN:VCALENDAR"));
        assert!(ical.contains("END:VCALENDAR"));
        Ok(())
    }
}

#[cfg(test)]
mod timezone_tests {
    use caldav_sync::timezone::TimezoneHandler;

    #[test]
    fn test_timezone_handler_creation() -> CalDavResult<()> {
        let handler = TimezoneHandler::new("UTC")?;
        assert_eq!(handler.default_timezone(), "UTC");
        Ok(())
    }

    #[test]
    fn test_timezone_validation() {
        assert!(TimezoneHandler::validate_timezone("UTC"));
        assert!(TimezoneHandler::validate_timezone("America/New_York"));
        assert!(TimezoneHandler::validate_timezone("Europe/London"));
        assert!(!TimezoneHandler::validate_timezone("Invalid/Timezone"));
    }

    #[test]
    fn test_ical_formatting() -> CalDavResult<()> {
        let handler = TimezoneHandler::default();
        let dt = DateTime::from_naive_utc_and_offset(
            chrono::NaiveDateTime::parse_from_str("20231225T100000", "%Y%m%dT%H%M%S").unwrap(),
            Utc
        );
        
        let ical_utc = handler.format_ical_datetime(dt, false)?;
        assert_eq!(ical_utc, "20231225T100000Z");
        
        let ical_date = handler.format_ical_date(dt);
        assert_eq!(ical_date, "20231225");
        Ok(())
    }
}

#[cfg(test)]
mod filter_tests {
    use caldav_sync::calendar_filter::{
        CalendarFilter, FilterRule, DateRangeFilter, KeywordFilter, 
        EventTypeFilter, EventStatusFilter, FilterBuilder
    };
    use caldav_sync::event::{Event, EventStatus, EventType};
    use chrono::{DateTime, Utc};

    #[test]
    fn test_date_range_filter() {
        let start = DateTime::from_naive_utc_and_offset(
            chrono::NaiveDateTime::parse_from_str("20231225T000000", "%Y%m%dT%H%M%S").unwrap(),
            Utc
        );
        let end = DateTime::from_naive_utc_and_offset(
            chrono::NaiveDateTime::parse_from_str("20231225T235959", "%Y%m%dT%H%M%S").unwrap(),
            Utc
        );
        
        let filter = DateRangeFilter::new(start, end);
        
        let event_start = DateTime::from_naive_utc_and_offset(
            chrono::NaiveDateTime::parse_from_str("20231225T100000", "%Y%m%dT%H%M%S").unwrap(),
            Utc
        );
        let event = Event::new("Test".to_string(), event_start, event_start + chrono::Duration::hours(1));
        assert!(filter.matches_event(&event));
        
        let event_outside = Event::new(
            "Test".to_string(),
            start - chrono::Duration::days(1),
            start - chrono::Duration::hours(23),
        );
        assert!(!filter_outside.matches_event(&event_outside));
    }

    #[test]
    fn test_keyword_filter() {
        let filter = KeywordFilter::new(vec!["meeting".to_string(), "important".to_string()], false);
        
        let event1 = Event::new("Team Meeting".to_string(), Utc::now(), Utc::now());
        assert!(filter.matches_event(&event1));
        
        let event2 = Event::new("Lunch".to_string(), Utc::now(), Utc::now());
        assert!(!filter.matches_event(&event2));
    }

    #[test]
    fn test_calendar_filter() {
        let mut filter = CalendarFilter::new(true); // OR logic
        filter.add_rule(FilterRule::Keywords(KeywordFilter::new(vec!["meeting".to_string()], false)));
        filter.add_rule(FilterRule::EventStatus(EventStatusFilter::new(vec![EventStatus::Cancelled])));
        
        let event1 = Event::new("Team Meeting".to_string(), Utc::now(), Utc::now());
        assert!(filter.matches_event(&event1)); // Matches keyword
        
        let mut event2 = Event::new("Holiday".to_string(), Utc::now(), Utc::now());
        event2.status = EventStatus::Cancelled;
        assert!(filter.matches_event(&event2)); // Matches status
        
        let event3 = Event::new("Lunch".to_string(), Utc::now(), Utc::now());
        assert!(!filter.matches_event(&event3)); // Matches neither
    }

    #[test]
    fn test_filter_builder() {
        let filter = FilterBuilder::new()
            .match_any(false) // AND logic
            .keywords(vec!["meeting".to_string()])
            .event_types(vec![EventType::Public])
            .build();
        
        let event = Event::new("Team Meeting".to_string(), Utc::now(), Utc::now());
        assert!(filter.matches_event(&event)); // Matches both conditions
    }
}

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

    #[test]
    fn test_library_initialization() -> CalDavResult<()> {
        caldav_sync::init()?;
        Ok(())
    }

    #[test]
    fn test_version() {
        assert!(!caldav_sync::VERSION.is_empty());
    }

    #[test]
    fn test_full_workflow() -> CalDavResult<()> {
        // Initialize library
        caldav_sync::init()?;
        
        // Create configuration
        let config = Config::default();
        
        // Validate configuration
        config.validate()?;
        
        // Create some test events
        let event1 = caldav_sync::event::Event::new(
            "Test Meeting".to_string(),
            Utc::now(),
            Utc::now() + chrono::Duration::hours(1),
        );
        
        let event2 = caldav_sync::event::Event::new_all_day(
            "Test Holiday".to_string(),
            chrono::NaiveDate::from_ymd_opt(2023, 12, 25).unwrap(),
        );
        
        // Test event serialization
        let ical1 = event1.to_ical()?;
        let ical2 = event2.to_ical()?;
        
        assert!(!ical1.is_empty());
        assert!(!ical2.is_empty());
        assert!(ical1.contains("SUMMARY:Test Meeting"));
        assert!(ical2.contains("SUMMARY:Test Holiday"));
        
        // Test filtering
        let filter = caldav_sync::calendar_filter::FilterBuilder::new()
            .keywords(vec!["test".to_string()])
            .build();
        
        assert!(filter.matches_event(&event1));
        assert!(filter.matches_event(&event2));
        
        Ok(())
    }
}