//! Auto-generated module
//!
//! 🤖 Generated with [SplitRS](https://github.com/cool-japan/splitrs)

use crate::error::{IoError, Result};
use chrono::{DateTime, Datelike, Duration, Utc};
use std::collections::{HashMap, HashSet};

use super::types::{Task, Workflow, WorkflowStatus};

/// External workflow engine integration
pub mod engines {
    use super::*;
    /// Trait for external workflow engine adapters
    pub trait WorkflowEngineAdapter: Send + Sync {
        /// Convert internal workflow to engine-specific format
        fn exportworkflow(&self, workflow: &Workflow) -> Result<String>;
        /// Import workflow from engine-specific format
        fn importworkflow(&self, definition: &str) -> Result<Workflow>;
        /// Submit workflow for execution
        fn submit(&self, workflow: &Workflow) -> Result<String>;
        /// Get execution status
        fn get_status(&self, executionid: &str) -> Result<WorkflowStatus>;
        /// Cancel execution
        fn cancel(&self, executionid: &str) -> Result<()>;
    }
    /// Apache Airflow adapter
    pub struct AirflowAdapter {
        api_url: String,
        auth_token: Option<String>,
    }
    impl AirflowAdapter {
        pub fn new(api_url: impl Into<String>) -> Self {
            Self {
                api_url: api_url.into(),
                auth_token: None,
            }
        }
        pub fn with_auth(mut self, token: impl Into<String>) -> Self {
            self.auth_token = Some(token.into());
            self
        }
    }
    impl WorkflowEngineAdapter for AirflowAdapter {
        fn exportworkflow(&self, workflow: &Workflow) -> Result<String> {
            let mut dag_code = String::new();
            dag_code.push_str("from airflow import DAG\n");
            dag_code.push_str("from airflow.operators.python import PythonOperator\n");
            dag_code.push_str("from datetime import datetime, timedelta\n\n");
            dag_code.push_str("dag = DAG(\n");
            dag_code.push_str(&format!("    '{}',\n", workflow.id));
            dag_code.push_str(&format!(
                "    description='{}',\n",
                workflow.description.as_deref().unwrap_or("")
            ));
            dag_code.push_str("    default_args={\n");
            dag_code.push_str("        'owner': 'scirs2',\n");
            dag_code.push_str("        'retries': 3,\n");
            dag_code.push_str("        'retry_delay': timedelta(minutes=5),\n");
            dag_code.push_str("    },\n");
            dag_code.push_str("    schedule_interval=None,\n");
            dag_code.push_str("    start_date=datetime(2024, 1, 1),\n");
            dag_code.push_str("    catchup=False,\n");
            dag_code.push_str(")\n\n");
            for task in &workflow.tasks {
                dag_code.push_str(&format!("{} = PythonOperator(\n", task.id));
                dag_code.push_str(&format!("    task_id='{}',\n", task.id));
                dag_code.push_str(&format!(
                    "    python_callable=lambda: print('{}'),\n",
                    task.name
                ));
                dag_code.push_str("    dag=dag,\n");
                dag_code.push_str(")\n\n");
            }
            for (task_id, deps) in &workflow.dependencies {
                for dep in deps {
                    dag_code.push_str(&format!("{dep} >> {task_id}\n"));
                }
            }
            Ok(dag_code)
        }
        fn importworkflow(&self, definition: &str) -> Result<Workflow> {
            Err(IoError::UnsupportedFormat(
                "Airflow import not yet implemented".to_string(),
            ))
        }
        fn submit(&self, workflow: &Workflow) -> Result<String> {
            let executionid = format!("{}_run_{}", workflow.id, Utc::now().timestamp());
            Ok(executionid)
        }
        fn get_status(&self, _executionid: &str) -> Result<WorkflowStatus> {
            Ok(WorkflowStatus::Running)
        }
        fn cancel(&self, _executionid: &str) -> Result<()> {
            Ok(())
        }
    }
    /// Prefect adapter
    pub struct PrefectAdapter {
        api_url: String,
        project_name: String,
    }
    impl PrefectAdapter {
        pub fn new(api_url: impl Into<String>, project: impl Into<String>) -> Self {
            Self {
                api_url: api_url.into(),
                project_name: project.into(),
            }
        }
    }
    impl WorkflowEngineAdapter for PrefectAdapter {
        fn exportworkflow(&self, workflow: &Workflow) -> Result<String> {
            let mut flow_code = String::new();
            flow_code.push_str("from prefect import flow, task\n");
            flow_code.push_str("from prefect.task_runners import SequentialTaskRunner\n\n");
            for task in &workflow.tasks {
                flow_code.push_str(&format!("@task(name='{}')\n", task.name));
                flow_code.push_str(&format!("def {}():\n", task.id));
                flow_code.push_str(&format!("    print('Executing {}')\n", task.name));
                flow_code.push_str("    return True\n\n");
            }
            flow_code.push_str(&format!(
                "@flow(name='{}', task_runner=SequentialTaskRunner())\n",
                workflow.name
            ));
            flow_code.push_str("def workflow_flow():\n");
            let mut executed = HashSet::new();
            let mut to_execute: Vec<_> = workflow.tasks.iter().map(|t| &t.id).collect();
            while !to_execute.is_empty() {
                let mut progress = false;
                to_execute.retain(|task_id| {
                    let deps = workflow.dependencies.get(*task_id);
                    let can_execute =
                        deps.is_none_or(|d| d.iter().all(|dep| executed.contains(dep)));
                    if can_execute {
                        flow_code.push_str(&format!("    {task_id}()\n"));
                        executed.insert((*task_id).clone());
                        progress = true;
                        false
                    } else {
                        true
                    }
                });
                if !progress && !to_execute.is_empty() {
                    return Err(IoError::Other("Circular dependency detected".to_string()));
                }
            }
            flow_code.push_str("\nif __name__ == '__main__':\n");
            flow_code.push_str("    workflow_flow()\n");
            Ok(flow_code)
        }
        fn importworkflow(&self, definition: &str) -> Result<Workflow> {
            Err(IoError::UnsupportedFormat(
                "Prefect import not yet implemented".to_string(),
            ))
        }
        fn submit(&self, workflow: &Workflow) -> Result<String> {
            let flow_run_id = uuid::Uuid::new_v4().to_string();
            Ok(flow_run_id)
        }
        fn get_status(&self, _executionid: &str) -> Result<WorkflowStatus> {
            Ok(WorkflowStatus::Running)
        }
        fn cancel(&self, _executionid: &str) -> Result<()> {
            Ok(())
        }
    }
    /// Dagster adapter
    pub struct DagsterAdapter {
        repository_url: String,
    }
    impl WorkflowEngineAdapter for DagsterAdapter {
        fn exportworkflow(&self, workflow: &Workflow) -> Result<String> {
            let mut job_code = String::new();
            job_code.push_str("from dagster import job, op, Config\n\n");
            for task in &workflow.tasks {
                job_code.push_str(&format!("@op(name='{}')\n", task.id));
                job_code.push_str(&format!("def {}(context):\n", task.id));
                job_code.push_str(&format!(
                    "    context.log.info('Executing {}')\n",
                    task.name
                ));
                job_code.push_str("    return True\n\n");
            }
            job_code.push_str(&format!("@job(name='{}')\n", workflow.id));
            job_code.push_str("def workflow_job():\n");
            for task in &workflow.tasks {
                if let Some(deps) = workflow.dependencies.get(&task.id) {
                    let deps_str = deps.join(", ");
                    job_code.push_str(&format!("    {}({}())\n", task.id, deps_str));
                } else {
                    job_code.push_str(&format!("    {}()\n", task.id));
                }
            }
            Ok(job_code)
        }
        fn importworkflow(&self, definition: &str) -> Result<Workflow> {
            Err(IoError::UnsupportedFormat(
                "Dagster import not yet implemented".to_string(),
            ))
        }
        fn submit(&self, workflow: &Workflow) -> Result<String> {
            Ok(uuid::Uuid::new_v4().to_string())
        }
        fn get_status(&self, _executionid: &str) -> Result<WorkflowStatus> {
            Ok(WorkflowStatus::Running)
        }
        fn cancel(&self, _executionid: &str) -> Result<()> {
            Ok(())
        }
    }
}
/// Dynamic workflow generation
pub mod dynamic {
    use super::*;
    /// Dynamic workflow generator
    pub struct DynamicWorkflowGenerator {
        templates: HashMap<String, WorkflowTemplate>,
    }
    #[derive(Debug, Clone)]
    pub struct WorkflowTemplate {
        pub baseworkflow: Workflow,
        pub parameters: Vec<ParameterDef>,
        pub generators: Vec<TaskGenerator>,
    }
    #[derive(Debug, Clone)]
    pub struct ParameterDef {
        pub name: String,
        pub param_type: ParameterType,
        pub required: bool,
        pub default: Option<serde_json::Value>,
    }
    #[derive(Debug, Clone)]
    pub enum ParameterType {
        String,
        Integer,
        Float,
        Boolean,
        List(Box<ParameterType>),
        Object,
    }
    #[derive(Debug, Clone)]
    pub enum TaskGenerator {
        ForEach {
            parameter: String,
            task_template: Task,
        },
        Conditional {
            condition: String,
            true_tasks: Vec<Task>,
            false_tasks: Vec<Task>,
        },
        Repeat {
            count_param: String,
            task_template: Task,
        },
    }
    impl Default for DynamicWorkflowGenerator {
        fn default() -> Self {
            Self::new()
        }
    }
    impl DynamicWorkflowGenerator {
        pub fn new() -> Self {
            Self {
                templates: HashMap::new(),
            }
        }
        /// Register a workflow template
        pub fn register_template(&mut self, name: impl Into<String>, template: WorkflowTemplate) {
            self.templates.insert(name.into(), template);
        }
        /// Generate workflow from template
        pub fn generate(
            &self,
            template_name: &str,
            params: HashMap<String, serde_json::Value>,
        ) -> Result<Workflow> {
            let template = self.templates.get(template_name).ok_or_else(|| {
                IoError::NotFound(format!("Template '{template_name}' not found"))
            })?;
            for param_def in &template.parameters {
                if param_def.required && !params.contains_key(&param_def.name) {
                    return Err(IoError::ValidationError(format!(
                        "Required parameter '{}' not provided",
                        param_def.name
                    )));
                }
            }
            let mut workflow = template.baseworkflow.clone();
            workflow.id = format!("{}_{}", workflow.id, Utc::now().timestamp());
            for generator in &template.generators {
                self.apply_generator(&mut workflow, generator, &params)?;
            }
            Ok(workflow)
        }
        fn apply_generator(
            &self,
            workflow: &mut Workflow,
            generator: &TaskGenerator,
            params: &HashMap<String, serde_json::Value>,
        ) -> Result<()> {
            match generator {
                TaskGenerator::ForEach {
                    parameter,
                    task_template,
                } => {
                    if let Some(serde_json::Value::Array(items)) = params.get(parameter) {
                        for (i, item) in items.iter().enumerate() {
                            let mut task = task_template.clone();
                            task.id = format!("{}_{}", task.id, i);
                            task.name = format!("{} [{}]", task.name, i);
                            if let serde_json::Value::Object(mut config) = task.config.clone() {
                                config.insert("item".to_string(), item.clone());
                                task.config = serde_json::Value::Object(config);
                            }
                            workflow.tasks.push(task);
                        }
                    }
                }
                TaskGenerator::Conditional {
                    condition,
                    true_tasks,
                    false_tasks,
                } => {
                    let condition_result = self.evaluate_condition(condition, params)?;
                    if condition_result {
                        workflow.tasks.extend(true_tasks.iter().cloned());
                    } else {
                        workflow.tasks.extend(false_tasks.iter().cloned());
                    }
                }
                TaskGenerator::Repeat {
                    count_param,
                    task_template,
                } => {
                    if let Some(serde_json::Value::Number(n)) = params.get(count_param) {
                        if let Some(count) = n.as_u64() {
                            for i in 0..count {
                                let mut task = task_template.clone();
                                task.id = format!("{}_{}", task.id, i);
                                task.name = format!("{} [{}]", task.name, i);
                                workflow.tasks.push(task);
                            }
                        }
                    }
                }
            }
            Ok(())
        }
        fn evaluate_condition(
            &self,
            condition: &str,
            params: &HashMap<String, serde_json::Value>,
        ) -> Result<bool> {
            if let Some((param, value)) = condition.split_once("==") {
                let param = param.trim();
                let value = value.trim().trim_matches('"');
                if let Some(serde_json::Value::String(s)) = params.get(param) {
                    return Ok(s == value);
                }
            }
            Ok(false)
        }
    }
}
