use crate::executors::SkillCall;
use crate::skill_scheduler::SkillScheduler;
use crate::t;
use serde_json::Value;
use std::collections::HashMap;
use std::time::Instant;
use tracing::info;
use super::core::WorkflowExecutor;
use super::prompt;
use super::types::*;
use super::utils::VARIABLE_REGEX;
pub fn parse_plan_response(response: &str) -> anyhow::Result<PlanInstruction> {
let json_str = WorkflowExecutor::extract_json(response);
let instruction: PlanInstruction = serde_json::from_str(&json_str)?;
Ok(instruction)
}
fn resolve_value_ref(value_ref: &ValueRef, context: &Workflow) -> Value {
match value_ref {
ValueRef::Literal(value) => value.clone(),
ValueRef::Reference(ref_reference) => {
let path = &ref_reference.path;
if let Some(value) = context.get_variable(path) {
value.clone()
} else if path == "user_input" {
Value::Null
} else {
Value::Null
}
}
ValueRef::Expression(expr) => Value::String(expr.expr.clone()),
}
}
fn resolve_variables_deep(value: &Value, context: &HashMap<String, Value>) -> Value {
if let Some(s) = value.as_str() {
if s.contains("{{") && s.contains("}}") {
let mut result = s.to_string();
for cap in VARIABLE_REGEX.captures_iter(s) {
let var_name = &cap[1];
if let Some(val) = context.get(var_name) {
let replacement = if let Some(num) = val.as_f64() {
num.to_string()
} else if let Some(s) = val.as_str() {
s.to_string()
} else {
val.to_string()
};
result = result.replace(&format!("{{{{{}}}}}", var_name), &replacement);
}
}
return Value::String(result);
}
return Value::String(s.to_string());
}
if let Some(s) = value.as_str() {
if s.starts_with("{{") && s.ends_with("}}") {
let var_name = &s[2..s.len() - 2];
if let Some(val) = context.get(var_name) {
return val.clone();
}
return Value::String(s.to_string());
}
return Value::String(s.to_string());
}
if let Some(obj) = value.as_object() {
let mut new_obj = serde_json::Map::new();
for (k, v) in obj {
new_obj.insert(k.clone(), resolve_variables_deep(v, context));
}
return Value::Object(new_obj);
}
if let Some(arr) = value.as_array() {
let new_arr: Vec<Value> = arr
.iter()
.map(|v| resolve_variables_deep(v, context))
.collect();
return Value::Array(new_arr);
}
value.clone()
}
fn evaluate_condition(condition: &Condition, context: &Workflow) -> bool {
let left = resolve_value_ref(&condition.left, context);
let right = resolve_value_ref(&condition.right, context);
match condition.op.as_str() {
"eq" => left == right,
"ne" => left != right,
"gt" => {
if let (Some(left_num), Some(right_num)) = (left.as_u64(), right.as_u64()) {
left_num > right_num
} else if let (Some(left_num), Some(right_num)) = (left.as_f64(), right.as_f64()) {
left_num > right_num
} else {
false
}
}
"lt" => {
if let (Some(left_num), Some(right_num)) = (left.as_u64(), right.as_u64()) {
left_num < right_num
} else if let (Some(left_num), Some(right_num)) = (left.as_f64(), right.as_f64()) {
left_num < right_num
} else {
false
}
}
"contains" => left
.as_str()
.map(|s| s.contains(right.as_str().unwrap_or("")))
.unwrap_or(false),
_ => false,
}
}
async fn execute_step_with_retry(
executor: &WorkflowExecutor,
skill_name: &str,
parameters: HashMap<String, Value>,
step: &WorkflowStep,
) -> anyhow::Result<String> {
let max_retries = step
.on_error
.as_ref()
.and_then(|e| e.max_retries)
.unwrap_or(1);
let mut last_error = None;
for attempt in 0..max_retries {
let call = SkillCall {
action: skill_name.to_string(),
parameters: parameters.clone(),
};
match executor.get_executor().execute(&call).await {
Ok(output) => return Ok(output),
Err(e) => {
last_error = Some(e);
if attempt < max_retries - 1 {
tokio::time::sleep(tokio::time::Duration::from_millis(
(100 * (attempt + 1)).into(),
))
.await;
}
}
}
}
Err(anyhow::anyhow!(
last_error.unwrap_or_else(|| anyhow::anyhow!("Unknown error"))
))
}
async fn execute_workflow_plan(
executor: &WorkflowExecutor,
plan: &WorkflowPlan,
) -> anyhow::Result<(String, usize, usize)> {
let mut context = Workflow::new();
for (key, value) in &plan.parameters {
context.set_variable(key, value.clone());
}
let mut string_context = HashMap::new();
let mut success_count = 0;
let mut failed_count = 0;
for step in &plan.steps {
if let Some(condition) = &step.condition {
if !evaluate_condition(condition, &context) {
info!("Step {} condition not met, skipping", step.id);
continue;
}
}
let mut resolved_params = HashMap::new();
for (key, value_ref) in &step.parameters {
let resolved = resolve_value_ref(value_ref, &context);
let final_resolved = resolve_variables_deep(&resolved, &string_context);
resolved_params.insert(key.clone(), final_resolved);
}
let result = execute_step_with_retry(executor, &step.action, resolved_params, step).await;
match result {
Ok(output) => {
if let Some(output_as) = &step.output_as {
context.set_variable(output_as, Value::String(output.clone()));
string_context.insert(output_as.clone(), Value::String(output.clone()));
}
context.add_step_result(WorkflowStepResult {
step_id: step.id.clone(),
skill: step.action.clone(),
input: step
.parameters
.iter()
.map(|(k, v)| (k.clone(), value_ref_to_value(v)))
.collect(),
output: output.clone(),
success: true,
error: None,
});
success_count += 1;
}
Err(e) => {
if let Some(error_handler) = &step.on_error {
match error_handler.action.as_str() {
"skip" => {
context.add_step_result(WorkflowStepResult {
step_id: step.id.clone(),
skill: step.action.clone(),
input: step
.parameters
.iter()
.map(|(k, v)| (k.clone(), value_ref_to_value(v)))
.collect(),
output: String::new(),
success: false,
error: Some(e.to_string()),
});
failed_count += 1;
continue;
}
"fail" => {
return Err(anyhow::anyhow!("Step {} failed: {}", step.id, e));
}
_ => {
return Err(anyhow::anyhow!("Step {} failed: {}", step.id, e));
}
}
} else {
return Err(anyhow::anyhow!("Step {} failed: {}", step.id, e));
}
}
}
}
let final_output = if let Some(last_result) = context.get_step_results().last() {
last_result.output.clone()
} else {
t!("skill.no_steps_executed").to_string()
};
Ok((final_output, success_count, failed_count))
}
fn value_ref_to_value(value_ref: &ValueRef) -> Value {
match value_ref {
ValueRef::Literal(value) => value.clone(),
ValueRef::Reference(ref_reference) => Value::String(format!("$ref:{}", ref_reference.path)),
ValueRef::Expression(expr) => Value::String(format!("$expr:{}", expr.expr)),
}
}
pub async fn execute_plan_and_execute(
executor: &WorkflowExecutor,
scheduler: &SkillScheduler,
input: &str,
skills_registry: &str,
instances_registry: &str,
) -> String {
let overall_start = Instant::now();
let plan_prompt = prompt::build_plan_prompt(skills_registry, instances_registry, input);
let llm_response = match scheduler.get_llm().generate(&plan_prompt).await {
Ok(resp) => resp,
Err(e) => return format!("{}: {}", t!("error.llm_error"), e),
};
let instruction = match parse_plan_response(&llm_response) {
Ok(instr) => instr,
Err(e) => return format!("Failed to parse plan: {}", e),
};
let task_id = executor.get_task_id().map(|s| s.to_string());
match instruction {
PlanInstruction {
mode,
plan,
message,
} => {
if mode == "done" {
let total_duration = overall_start.elapsed().as_millis() as u64;
let final_msg =
message.unwrap_or_else(|| t!("skill.no_actions_executed").to_string());
if let Some(cb) = executor.get_callback() {
if let Some(ref tid) = task_id {
cb.on_workflow_complete(tid, &final_msg, total_duration, 0)
.await;
}
}
return final_msg;
}
if let Some(plan) = plan {
match execute_workflow_plan(executor, &plan).await {
Ok((result, success_count, failed_count)) => {
let total_duration = overall_start.elapsed().as_millis() as u64;
let total_steps = success_count + failed_count;
if let Some(cb) = executor.get_callback() {
if let Some(ref tid) = task_id {
if failed_count > 0 {
cb.on_workflow_failed(
tid,
&result,
total_duration,
total_steps,
)
.await;
} else {
cb.on_workflow_complete(
tid,
&result,
total_duration,
total_steps,
)
.await;
}
}
}
result
}
Err(e) => {
let total_duration = overall_start.elapsed().as_millis() as u64;
let error_msg = e.to_string();
if let Some(cb) = executor.get_callback() {
if let Some(ref tid) = task_id {
cb.on_workflow_failed(tid, &error_msg, total_duration, 0)
.await;
}
}
format!("Workflow failed: {}", error_msg)
}
}
} else {
t!("skill.no_actions_executed").to_string()
}
}
}
}