// Telemedicine Platform - Chicago TDD Tests
// London School TDD approach with comprehensive test coverage

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

    // ===== Unit Tests =====

    #[test]
    fn test_consultation_creation() {
        let mut platform = TelemedicinePlatform::new();
        let result = platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        );
        assert!(result.is_ok());
        let consultation = result.unwrap();
        assert_eq!(consultation.id, "CONS-001");
        assert!(consultation.encrypted);
    }

    #[test]
    fn test_consultation_lifecycle() {
        let mut platform = TelemedicinePlatform::new();
        platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        // Start consultation
        platform.start_consultation("CONS-001").unwrap();
        let active = platform.get_active_consultations();
        assert_eq!(active.len(), 1);

        // End consultation
        platform.end_consultation("CONS-001", 30).unwrap();
        let active_after = platform.get_active_consultations();
        assert_eq!(active_after.len(), 0);
    }

    #[test]
    fn test_prescription_creation() {
        let mut platform = TelemedicinePlatform::new();
        platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        let rx_id = platform.create_prescription(
            "CONS-001",
            "00093-4157-01".to_string(),
            "500mg".to_string(),
            "twice daily".to_string(),
            30,
            "PHARM-001".to_string(),
        ).unwrap();

        assert!(rx_id.starts_with("RX-"));
    }

    #[test]
    fn test_consultation_types() {
        let mut platform = TelemedicinePlatform::new();

        platform.create_consultation(
            "CONS-VIDEO".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        platform.create_consultation(
            "CONS-AUDIO".to_string(),
            ConsultationType::Audio,
            "PROV-001".to_string(),
            "PAT-002".to_string(),
        ).unwrap();

        platform.create_consultation(
            "CONS-CHAT".to_string(),
            ConsultationType::Chat,
            "PROV-001".to_string(),
            "PAT-003".to_string(),
        ).unwrap();

        let provider_consultations = platform.get_consultations_by_provider("PROV-001");
        assert_eq!(provider_consultations.len(), 3);
    }

    #[test]
    fn test_consultation_not_found() {
        let mut platform = TelemedicinePlatform::new();
        let result = platform.start_consultation("NONEXISTENT");
        assert!(result.is_err());
    }

    #[test]
    fn test_multiple_providers() {
        let mut platform = TelemedicinePlatform::new();

        platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        platform.create_consultation(
            "CONS-002".to_string(),
            ConsultationType::Video,
            "PROV-002".to_string(),
            "PAT-002".to_string(),
        ).unwrap();

        let prov1_cons = platform.get_consultations_by_provider("PROV-001");
        let prov2_cons = platform.get_consultations_by_provider("PROV-002");

        assert_eq!(prov1_cons.len(), 1);
        assert_eq!(prov2_cons.len(), 1);
    }

    #[test]
    fn test_consultation_encryption() {
        let mut platform = TelemedicinePlatform::new();
        let consultation = platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        assert!(consultation.encrypted);
    }

    #[test]
    fn test_prescription_details() {
        let mut platform = TelemedicinePlatform::new();
        platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        let rx_id = platform.create_prescription(
            "CONS-001",
            "00093-4157-01".to_string(),
            "500mg".to_string(),
            "twice daily".to_string(),
            30,
            "PHARM-001".to_string(),
        ).unwrap();

        assert!(rx_id.len() > 0);
    }

    // ===== Integration Tests =====

    #[test]
    fn test_full_consultation_workflow() {
        let mut platform = TelemedicinePlatform::new();

        // Create consultation
        platform.create_consultation(
            "CONS-WORKFLOW".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        // Start
        platform.start_consultation("CONS-WORKFLOW").unwrap();
        assert_eq!(platform.get_active_consultations().len(), 1);

        // Create prescription during consultation
        platform.create_prescription(
            "CONS-WORKFLOW",
            "12345-678-90".to_string(),
            "250mg".to_string(),
            "once daily".to_string(),
            60,
            "PHARM-001".to_string(),
        ).unwrap();

        // End consultation
        platform.end_consultation("CONS-WORKFLOW", 25).unwrap();
        assert_eq!(platform.get_active_consultations().len(), 0);
    }

    #[test]
    fn test_concurrent_consultations() {
        let mut platform = TelemedicinePlatform::new();

        for i in 1..=5 {
            platform.create_consultation(
                format!("CONS-{}", i),
                ConsultationType::Video,
                format!("PROV-{}", i),
                format!("PAT-{}", i),
            ).unwrap();
            platform.start_consultation(&format!("CONS-{}", i)).unwrap();
        }

        assert_eq!(platform.get_active_consultations().len(), 5);
    }

    // ===== Performance Tests =====

    #[test]
    fn test_large_consultation_volume() {
        let mut platform = TelemedicinePlatform::new();

        for i in 1..=100 {
            platform.create_consultation(
                format!("CONS-{}", i),
                ConsultationType::Video,
                "PROV-001".to_string(),
                format!("PAT-{}", i),
            ).unwrap();
        }

        let consultations = platform.get_consultations_by_provider("PROV-001");
        assert_eq!(consultations.len(), 100);
    }

    #[test]
    fn test_prescription_bulk_creation() {
        let mut platform = TelemedicinePlatform::new();
        platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        for i in 1..=10 {
            platform.create_prescription(
                "CONS-001",
                format!("NDC-{}", i),
                "100mg".to_string(),
                "once daily".to_string(),
                30,
                "PHARM-001".to_string(),
            ).unwrap();
        }
    }

    // ===== Edge Cases =====

    #[test]
    fn test_zero_duration_consultation() {
        let mut platform = TelemedicinePlatform::new();
        platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        platform.start_consultation("CONS-001").unwrap();
        let result = platform.end_consultation("CONS-001", 0);
        assert!(result.is_ok());
    }

    #[test]
    fn test_long_duration_consultation() {
        let mut platform = TelemedicinePlatform::new();
        platform.create_consultation(
            "CONS-001".to_string(),
            ConsultationType::Video,
            "PROV-001".to_string(),
            "PAT-001".to_string(),
        ).unwrap();

        platform.start_consultation("CONS-001").unwrap();
        let result = platform.end_consultation("CONS-001", 480); // 8 hours
        assert!(result.is_ok());
    }

    #[test]
    fn test_empty_provider_consultations() {
        let platform = TelemedicinePlatform::new();
        let consultations = platform.get_consultations_by_provider("NONEXISTENT");
        assert_eq!(consultations.len(), 0);
    }

    // ===== Security Tests =====

    #[test]
    fn test_all_consultations_encrypted() {
        let mut platform = TelemedicinePlatform::new();

        for i in 1..=10 {
            platform.create_consultation(
                format!("CONS-{}", i),
                ConsultationType::Video,
                "PROV-001".to_string(),
                format!("PAT-{}", i),
            ).unwrap();
        }

        let consultations = platform.get_consultations_by_provider("PROV-001");
        assert!(consultations.iter().all(|c| c.encrypted));
    }
}

// Mock implementations for compilation
struct TelemedicinePlatform {
    consultations: Vec<Consultation>,
    prescriptions: Vec<EPrescription>,
}

#[derive(Clone)]
struct Consultation {
    id: String,
    consultation_type: ConsultationType,
    provider_id: String,
    patient_id: String,
    status: ConsultationStatus,
    encrypted: bool,
}

struct EPrescription {
    id: String,
    consultation_id: String,
}

#[derive(Clone)]
enum ConsultationType {
    Video,
    Audio,
    Chat,
}

#[derive(Clone, PartialEq)]
enum ConsultationStatus {
    Scheduled,
    InProgress,
    Completed,
}

impl TelemedicinePlatform {
    fn new() -> Self {
        Self {
            consultations: Vec::new(),
            prescriptions: Vec::new(),
        }
    }

    fn create_consultation(
        &mut self,
        id: String,
        consultation_type: ConsultationType,
        provider_id: String,
        patient_id: String,
    ) -> Result<&Consultation, String> {
        let consultation = Consultation {
            id,
            consultation_type,
            provider_id,
            patient_id,
            status: ConsultationStatus::Scheduled,
            encrypted: true,
        };
        self.consultations.push(consultation);
        self.consultations.last().ok_or("Failed".to_string())
    }

    fn start_consultation(&mut self, id: &str) -> Result<(), String> {
        let consultation = self.consultations.iter_mut()
            .find(|c| c.id == id)
            .ok_or("Not found")?;
        consultation.status = ConsultationStatus::InProgress;
        Ok(())
    }

    fn end_consultation(&mut self, id: &str, _duration: u32) -> Result<(), String> {
        let consultation = self.consultations.iter_mut()
            .find(|c| c.id == id)
            .ok_or("Not found")?;
        consultation.status = ConsultationStatus::Completed;
        Ok(())
    }

    fn create_prescription(
        &mut self,
        consultation_id: &str,
        _ndc: String,
        _dosage: String,
        _frequency: String,
        _quantity: u32,
        _pharmacy: String,
    ) -> Result<String, String> {
        let id = format!("RX-{}", self.prescriptions.len() + 1);
        self.prescriptions.push(EPrescription {
            id: id.clone(),
            consultation_id: consultation_id.to_string(),
        });
        Ok(id)
    }

    fn get_active_consultations(&self) -> Vec<&Consultation> {
        self.consultations.iter()
            .filter(|c| c.status == ConsultationStatus::InProgress)
            .collect()
    }

    fn get_consultations_by_provider(&self, provider_id: &str) -> Vec<&Consultation> {
        self.consultations.iter()
            .filter(|c| c.provider_id == provider_id)
            .collect()
    }
}
