oxirs-physics 0.2.4

//! Physics Simulation Runner (SciRS2 Bridge)

use super::parameter_extraction::SimulationParameters;
use super::result_injection::{
    ConvergenceInfo, SimulationProvenance, SimulationResult, StateVector,
};
use crate::error::{PhysicsError, PhysicsResult};
use async_trait::async_trait;
use chrono::Utc;
use std::collections::HashMap;
use uuid::Uuid;

/// Trait for physics simulations (SciRS2 integration)
#[async_trait]
pub trait PhysicsSimulation: Send + Sync {
    /// Get simulation type name
    fn simulation_type(&self) -> &str;

    /// Run the simulation
    async fn run(&self, params: &SimulationParameters) -> PhysicsResult<SimulationResult>;

    /// Validate results against physics constraints
    fn validate_results(&self, result: &SimulationResult) -> PhysicsResult<()>;
}

/// Simulation Runner (executes simulations)
pub struct SimulationRunner;

impl SimulationRunner {
    pub fn new() -> Self {
        Self
    }
}

impl Default for SimulationRunner {
    fn default() -> Self {
        Self::new()
    }
}

/// Mock thermal simulation (example)
pub struct MockThermalSimulation;

#[async_trait]
impl PhysicsSimulation for MockThermalSimulation {
    fn simulation_type(&self) -> &str {
        "thermal"
    }

    async fn run(&self, params: &SimulationParameters) -> PhysicsResult<SimulationResult> {
        // Mock simulation - returns dummy data
        let mut trajectory = Vec::new();

        for i in 0..params.time_steps {
            let time = params.time_span.0
                + (params.time_span.1 - params.time_span.0) * (i as f64 / params.time_steps as f64);

            let mut state = HashMap::new();
            state.insert("temperature".to_string(), 20.0 + time * 0.1);

            trajectory.push(StateVector { time, state });
        }

        Ok(SimulationResult {
            entity_iri: params.entity_iri.clone(),
            simulation_run_id: Uuid::new_v4().to_string(),
            timestamp: Utc::now(),
            state_trajectory: trajectory,
            derived_quantities: HashMap::new(),
            convergence_info: ConvergenceInfo {
                converged: true,
                iterations: params.time_steps,
                final_residual: 1e-6,
            },
            provenance: SimulationProvenance {
                software: "oxirs-physics".to_string(),
                version: crate::VERSION.to_string(),
                parameters_hash: "mock_hash".to_string(),
                executed_at: Utc::now(),
                execution_time_ms: 100,
            },
        })
    }

    fn validate_results(&self, result: &SimulationResult) -> PhysicsResult<()> {
        if !result.convergence_info.converged {
            return Err(PhysicsError::Simulation(
                "Simulation did not converge".to_string(),
            ));
        }
        Ok(())
    }
}

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

    #[tokio::test]
    async fn test_mock_thermal_simulation() {
        let sim = MockThermalSimulation;

        let params = SimulationParameters {
            entity_iri: "urn:example:battery:001".to_string(),
            simulation_type: "thermal".to_string(),
            initial_conditions: HashMap::new(),
            boundary_conditions: Vec::new(),
            time_span: (0.0, 100.0),
            time_steps: 10,
            material_properties: HashMap::new(),
            constraints: Vec::new(),
        };

        let result = sim.run(&params).await.expect("should succeed");

        assert_eq!(result.state_trajectory.len(), 10);
        assert!(result.convergence_info.converged);
        assert!(sim.validate_results(&result).is_ok());
    }
}