forge-runtime 0.9.0

use chrono::{DateTime, Utc};
use forge_core::workflow::{StepStatus, WorkflowStatus};
use uuid::Uuid;

/// A workflow run record in the database.
#[derive(Debug, Clone)]
pub struct WorkflowRecord {
    /// Unique workflow run ID.
    pub id: Uuid,
    /// Workflow name.
    pub workflow_name: String,
    /// Version this run is pinned to.
    pub workflow_version: String,
    /// Signature this run was started with.
    pub workflow_signature: String,
    /// Principal that started the workflow.
    pub owner_subject: Option<String>,
    /// Input data as JSON.
    pub input: serde_json::Value,
    /// Output data as JSON (if completed).
    pub output: Option<serde_json::Value>,
    /// Current status.
    pub status: WorkflowStatus,
    /// Why the run is blocked (if status is blocked_*).
    pub blocking_reason: Option<String>,
    /// Why the run was resolved (for terminal operator actions).
    pub resolution_reason: Option<String>,
    /// Current step name.
    pub current_step: Option<String>,
    /// Step results as JSON map.
    pub step_results: serde_json::Value,
    /// When the workflow started.
    pub started_at: DateTime<Utc>,
    /// When the workflow completed.
    pub completed_at: Option<DateTime<Utc>>,
    /// Error message if failed.
    pub error: Option<String>,
    /// Trace ID for distributed tracing.
    pub trace_id: Option<String>,
}

impl WorkflowRecord {
    /// Create a new workflow record pinned to a specific version and signature.
    pub fn new(
        workflow_name: impl Into<String>,
        workflow_version: impl Into<String>,
        workflow_signature: impl Into<String>,
        input: serde_json::Value,
        owner_subject: Option<String>,
    ) -> Self {
        Self {
            id: Uuid::new_v4(),
            workflow_name: workflow_name.into(),
            workflow_version: workflow_version.into(),
            workflow_signature: workflow_signature.into(),
            owner_subject,
            input,
            output: None,
            status: WorkflowStatus::Created,
            blocking_reason: None,
            resolution_reason: None,
            current_step: None,
            step_results: serde_json::json!({}),
            started_at: Utc::now(),
            completed_at: None,
            error: None,
            trace_id: None,
        }
    }

    /// Set trace ID.
    pub fn with_trace_id(mut self, trace_id: impl Into<String>) -> Self {
        self.trace_id = Some(trace_id.into());
        self
    }

    /// Mark as running.
    pub fn start(&mut self) {
        self.status = WorkflowStatus::Running;
    }

    /// Mark as completed.
    pub fn complete(&mut self, output: serde_json::Value) {
        self.status = WorkflowStatus::Completed;
        self.output = Some(output);
        self.completed_at = Some(Utc::now());
    }

    /// Mark as failed.
    pub fn fail(&mut self, error: impl Into<String>) {
        self.status = WorkflowStatus::Failed;
        self.error = Some(error.into());
        self.completed_at = Some(Utc::now());
    }

    /// Mark as compensating.
    pub fn compensating(&mut self) {
        self.status = WorkflowStatus::Compensating;
    }

    /// Mark as compensated.
    pub fn compensated(&mut self) {
        self.status = WorkflowStatus::Compensated;
        self.completed_at = Some(Utc::now());
    }

    /// Update current step.
    pub fn set_current_step(&mut self, step: impl Into<String>) {
        self.current_step = Some(step.into());
    }

    /// Add step result.
    pub fn add_step_result(&mut self, step_name: &str, result: serde_json::Value) {
        if let Some(obj) = self.step_results.as_object_mut() {
            obj.insert(step_name.to_string(), result);
        }
    }
}

/// A workflow step record in the database.
#[derive(Debug, Clone)]
pub struct WorkflowStepRecord {
    /// Step record ID.
    pub id: Uuid,
    /// Parent workflow run ID.
    pub workflow_run_id: Uuid,
    /// Step name.
    pub step_name: String,
    /// Step status.
    pub status: StepStatus,
    /// Step result as JSON.
    pub result: Option<serde_json::Value>,
    /// Error message if failed.
    pub error: Option<String>,
    /// When the step started.
    pub started_at: Option<DateTime<Utc>>,
    /// When the step completed.
    pub completed_at: Option<DateTime<Utc>>,
}

impl WorkflowStepRecord {
    /// Create a new step record.
    pub fn new(workflow_run_id: Uuid, step_name: impl Into<String>) -> Self {
        Self {
            id: Uuid::new_v4(),
            workflow_run_id,
            step_name: step_name.into(),
            status: StepStatus::Pending,
            result: None,
            error: None,
            started_at: None,
            completed_at: None,
        }
    }

    /// Mark as running.
    pub fn start(&mut self) {
        self.status = StepStatus::Running;
        self.started_at = Some(Utc::now());
    }

    /// Mark as completed.
    pub fn complete(&mut self, result: serde_json::Value) {
        self.status = StepStatus::Completed;
        self.result = Some(result);
        self.completed_at = Some(Utc::now());
    }

    /// Mark as failed.
    pub fn fail(&mut self, error: impl Into<String>) {
        self.status = StepStatus::Failed;
        self.error = Some(error.into());
        self.completed_at = Some(Utc::now());
    }

    /// Mark as compensated.
    pub fn compensate(&mut self) {
        self.status = StepStatus::Compensated;
    }
}

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

    #[test]
    fn test_workflow_record_creation() {
        let record =
            WorkflowRecord::new("test_workflow", "v1", "abc123", serde_json::json!({}), None);
        assert_eq!(record.workflow_name, "test_workflow");
        assert_eq!(record.workflow_version, "v1");
        assert_eq!(record.workflow_signature, "abc123");
        assert_eq!(record.status, WorkflowStatus::Created);
    }

    #[test]
    fn test_workflow_record_transitions() {
        let mut record = WorkflowRecord::new("test", "v1", "sig", serde_json::json!({}), None);

        record.start();
        assert_eq!(record.status, WorkflowStatus::Running);

        record.complete(serde_json::json!({"result": "ok"}));
        assert_eq!(record.status, WorkflowStatus::Completed);
        assert!(record.completed_at.is_some());
    }

    #[test]
    fn test_workflow_step_record() {
        let workflow_id = Uuid::new_v4();
        let mut step = WorkflowStepRecord::new(workflow_id, "step1");

        assert_eq!(step.step_name, "step1");
        assert_eq!(step.status, StepStatus::Pending);

        step.start();
        assert_eq!(step.status, StepStatus::Running);

        step.complete(serde_json::json!({}));
        assert_eq!(step.status, StepStatus::Completed);
    }

    #[test]
    fn test_workflow_record_failure_path() {
        let mut record = WorkflowRecord::new("test", "v1", "sig", serde_json::json!({}), None);
        record.start();
        record.fail("something went wrong");

        assert_eq!(record.status, WorkflowStatus::Failed);
        assert_eq!(record.error.as_deref(), Some("something went wrong"));
        assert!(record.completed_at.is_some());
    }

    #[test]
    fn test_workflow_record_compensation_path() {
        let mut record = WorkflowRecord::new("test", "v1", "sig", serde_json::json!({}), None);
        record.start();
        record.compensating();
        assert_eq!(record.status, WorkflowStatus::Compensating);

        record.compensated();
        assert_eq!(record.status, WorkflowStatus::Compensated);
        assert!(record.completed_at.is_some());
    }

    #[test]
    fn test_workflow_step_results_accumulate() {
        let mut record = WorkflowRecord::new("test", "v1", "sig", serde_json::json!({}), None);
        record.add_step_result("step1", serde_json::json!({"user_id": 42}));
        record.add_step_result("step2", serde_json::json!({"verified": true}));

        let results = record.step_results.as_object().expect("should be object");
        assert_eq!(results.len(), 2);
        assert_eq!(
            results.get("step1").and_then(|v| v.get("user_id")),
            Some(&serde_json::json!(42))
        );
        assert_eq!(
            results.get("step2").and_then(|v| v.get("verified")),
            Some(&serde_json::json!(true))
        );
    }

    #[test]
    fn test_workflow_current_step_tracking() {
        let mut record = WorkflowRecord::new("test", "v1", "sig", serde_json::json!({}), None);
        assert!(record.current_step.is_none());

        record.set_current_step("validate_input");
        assert_eq!(record.current_step.as_deref(), Some("validate_input"));

        record.set_current_step("process_payment");
        assert_eq!(record.current_step.as_deref(), Some("process_payment"));
    }

    #[test]
    fn test_workflow_record_with_trace_id() {
        let record = WorkflowRecord::new("test", "v1", "sig", serde_json::json!({}), None)
            .with_trace_id("trace-abc-123");
        assert_eq!(record.trace_id.as_deref(), Some("trace-abc-123"));
    }

    #[test]
    fn test_workflow_record_with_owner() {
        let record = WorkflowRecord::new(
            "onboarding",
            "v1",
            "sig",
            serde_json::json!({}),
            Some("user-alice".into()),
        );
        assert_eq!(record.owner_subject.as_deref(), Some("user-alice"));
    }

    #[test]
    fn test_step_record_failure() {
        let mut step = WorkflowStepRecord::new(Uuid::new_v4(), "charge_card");
        step.start();
        step.fail("card declined");

        assert_eq!(step.status, StepStatus::Failed);
        assert_eq!(step.error.as_deref(), Some("card declined"));
        assert!(step.completed_at.is_some());
    }

    #[test]
    fn test_step_record_compensate() {
        let mut step = WorkflowStepRecord::new(Uuid::new_v4(), "reserve_inventory");
        step.start();
        step.complete(serde_json::json!({"reserved": 5}));

        // Later, compensation needed
        step.compensate();
        assert_eq!(step.status, StepStatus::Compensated);
    }
}