use octofhir_fhirpath::FhirPathEngine;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let engine = FhirPathEngine::with_mock_provider().await?;
    
    let patient = json!({
        "resourceType": "Patient",
        "name": [
            {"given": ["Alice"], "family": "Smith"},
            {"given": ["Dr. Alice"], "family": "Smith", "use": "professional"}
        ],
        "active": true
    });
    
    // Get all given names
    let names = engine.evaluate("Patient.name.given", patient.clone()).await?;
    println!("Names: {}", names); // ["Alice", "Dr. Alice"]
    
    // Filter by use and get family name
    let professional = engine.evaluate(
        "Patient.name.where(use = 'professional').family.first()", 
        patient.clone()
    ).await?;
    println!("Professional name: {}", professional); // "Smith"
    
    Ok(())
}

use octofhir_fhirpath::FhirPathEngine;
use serde_json::json;

// Create engine (use MockModelProvider for simple cases)
let engine = FhirPathEngine::with_mock_provider().await?;

// Your FHIR data
let patient = json!({"resourceType": "Patient", "active": true});

// Evaluate expressions
let result = engine.evaluate("Patient.active", patient).await?;
println!("Active: {}", result); // [true]

use octofhir_fhirpath::{FhirPathEngine, FhirPathValue};
use octofhir_fhirpath_model::FhirSchemaModelProvider;

// Create engine with full FHIR R5 schema support
let model_provider = FhirSchemaModelProvider::r5().await?;
let engine = FhirPathEngine::with_model_provider(Box::new(model_provider)).await?;

// Now supports advanced features like type checking, resolve(), etc.
let result = engine.evaluate("Patient.active is Boolean", patient).await?;

// Find all active patients over 18
engine.evaluate("Bundle.entry.resource.where(resourceType='Patient' and active=true and birthDate < today()-18 'years')", bundle).await?

// Get medication names from prescriptions
engine.evaluate("Bundle.entry.resource.where(resourceType='MedicationRequest').medicationReference.resolve().code.coding.display", bundle).await?

// Check if patient has required fields
engine.evaluate("Patient.name.exists() and Patient.birthDate.exists()", patient).await?

// Validate phone number format
engine.evaluate("Patient.telecom.where(system='phone').value.matches('[0-9-()]+')", patient).await?

// Find high-risk patients
engine.evaluate("Patient.extension.where(url='http://example.org/risk-score').valueInteger > 8", patient).await?

// Calculate medication dosage
engine.evaluate("MedicationRequest.dosageInstruction.doseAndRate.doseQuantity.value * 2", medication).await?