rsclaw 2026.5.1

use anyhow::Result;
use tracing::warn;

use super::style::*;
use crate::{cli::CronCommand, config};

pub async fn cmd_cron(sub: CronCommand) -> Result<()> {
    match sub {
        CronCommand::List | CronCommand::Status => {
            banner(&format!("rsclaw cron v{}", option_env!("RSCLAW_BUILD_VERSION").unwrap_or("dev")));
            let (jobs, parse_ok) = crate::cron::load_cron_jobs();
            if !parse_ok {
                warn_msg("cron.json5 has syntax errors - fix the file before modifying jobs");
            }
            if jobs.is_empty() {
                warn_msg("no cron jobs configured");
            } else {
                println!(
                    "  {:<36} {:<10} {:<14} {}",
                    bold("ID"),
                    bold("STATUS"),
                    bold("AGENT"),
                    bold("SCHEDULE")
                );
                for j in &jobs {
                    let enabled = j.enabled;
                    let agent = if j.agent_id.is_empty() { "(default)" } else { &j.agent_id };
                    let status = if enabled {
                        green("enabled")
                    } else {
                        red("disabled")
                    };
                    let schedule = j.cron_expr();
                    println!(
                        "  {:<36} {:<10} {:<14} {}",
                        cyan(&j.id),
                        status,
                        agent,
                        dim(schedule)
                    );
                }
            }
        }
        CronCommand::Run { id } => {
            // Manual trigger: POST to gateway API if running.
            let config = config::load()?;
            let port = config.gateway.port;
            let (jobs, _) = crate::cron::load_cron_jobs();
            let job = jobs
                .iter()
                .find(|j| j.id == id)
                .ok_or_else(|| anyhow::anyhow!("cron job '{id}' not found"))?;
            let url = format!("http://127.0.0.1:{port}/api/v1/message");
            let body = serde_json::json!({
                "text": job.effective_message(),
                "agent_id": job.agent_id,
                "session_key": format!("cron:{id}:manual"),
            });
            let client = reqwest::Client::new();
            let resp = client
                .post(&url)
                .json(&body)
                .send()
                .await
                .map_err(|e| anyhow::anyhow!("gateway unreachable at {url}: {e}"))?;
            if resp.status().is_success() {
                ok(&format!("cron job '{}' triggered", cyan(&id)));
            } else {
                let status = resp.status();
                let text = resp.text().await.unwrap_or_default();
                anyhow::bail!("gateway error {status}: {text}");
            }
        }
        CronCommand::Runs { id } => {
            banner(&format!("rsclaw cron runs: {id}"));
            let log_file = config::loader::base_dir()
                .join("var/data/cron")
                .join(format!("{id}.jsonl"));
            if !log_file.exists() {
                warn_msg(&format!("no run history for '{}'", cyan(&id)));
            } else {
                let content = std::fs::read_to_string(&log_file)?;
                for line in content.lines().rev().take(20) {
                    if let Ok(entry) = serde_json::from_str::<serde_json::Value>(line) {
                        let success = entry["success"].as_bool().unwrap_or(false);
                        let status = if success { green("ok") } else { red("fail") };
                        let ts = entry["startedAt"].as_str().unwrap_or("?");
                        let error = entry["error"].as_str().unwrap_or("");
                        println!(
                            "  [{}] {} {}",
                            dim(ts),
                            status,
                            if error.is_empty() {
                                String::new()
                            } else {
                                red(error)
                            }
                        );
                    }
                }
            }
        }
        CronCommand::Add(args) => {
            validate_cron_schedule(&args.schedule)?;

            let (mut jobs, parse_ok) = crate::cron::load_cron_jobs();
            if !parse_ok {
                anyhow::bail!("cron.json5 has syntax errors - fix the file before adding jobs");
            }
            let id = format!("job-{}", jobs.len() + 1);

            let job = crate::cron::CronJob {
                id: id.clone(),
                name: None,
                agent_id: args.agent.clone().unwrap_or_else(|| "main".to_string()),
                session_key: None,
                enabled: true,
                schedule: crate::cron::CronSchedule::Flat(args.schedule.clone()),
                payload: None,
                message: Some(args.message.clone()),
                delivery: None,
                session_target: None,
                wake_mode: None,
                state: Some(crate::cron::CronJobState::default()),
                iter: None,
                created_at_ms: Some(chrono::Utc::now().timestamp_millis() as u64),
                updated_at_ms: None,
            };

            jobs.push(job);
            crate::cron::save_cron_jobs(&jobs)?;

            // Notify the running gateway to reload cron jobs
            if let Ok(config) = config::load() {
                let port = config.gateway.port;
                let url = format!("http://127.0.0.1:{port}/api/v1/cron/reload");
                if let Ok(client) = reqwest::blocking::Client::builder()
                    .timeout(std::time::Duration::from_secs(3))
                    .build()
                {
                    if let Err(e) = client.post(&url).send() {
                        warn!("failed to notify gateway of cron reload: {e}");
                    }
                }
            }

            ok(&format!(
                "added cron job '{}' ({})",
                cyan(&id),
                dim(&args.schedule)
            ));
        }
        CronCommand::Edit { id } => {
            let (jobs, _) = crate::cron::load_cron_jobs();
            jobs.iter()
                .find(|j| j.id == id)
                .ok_or_else(|| anyhow::anyhow!("cron job '{id}' not found"))?;

            // Open the jobs.json file in editor
            let jobs_file = config::loader::base_dir().join("cron.json5");
            let editor = std::env::var("EDITOR").unwrap_or_else(|_| {
                if cfg!(windows) { "notepad".to_owned() } else { "vi".to_owned() }
            });
            let status = std::process::Command::new(&editor).arg(&jobs_file).status()?;
            if !status.success() {
                anyhow::bail!("editor exited with {status}");
            }
            ok(&format!("edited cron jobs file"));
        }
        CronCommand::Enable { id } => cron_set_enabled(&id, true)?,
        CronCommand::Disable { id } => cron_set_enabled(&id, false)?,
        CronCommand::Rm { id } => {
            let (mut jobs, parse_ok) = crate::cron::load_cron_jobs();
            if !parse_ok {
                anyhow::bail!("cron.json5 has syntax errors - fix the file before removing jobs");
            }
            let before = jobs.len();
            jobs.retain(|j| j.id != id);
            if jobs.len() == before {
                anyhow::bail!("cron job '{id}' not found");
            }
            crate::cron::save_cron_jobs(&jobs)?;

            // Notify the running gateway to reload cron jobs
            if let Ok(config) = config::load() {
                let port = config.gateway.port;
                let url = format!("http://127.0.0.1:{port}/api/v1/cron/reload");
                if let Ok(client) = reqwest::blocking::Client::builder()
                    .timeout(std::time::Duration::from_secs(3))
                    .build()
                {
                    if let Err(e) = client.post(&url).send() {
                        warn!("failed to notify gateway of cron reload: {e}");
                    }
                }
            }

            ok(&format!("removed cron job '{}'", cyan(&id)));
        }
    }
    Ok(())
}

// ---------------------------------------------------------------------------
// Cron expression validator
// ---------------------------------------------------------------------------

/// Validate a 5-field cron expression (minute hour day month weekday).
fn validate_cron_schedule(schedule: &str) -> Result<()> {
    let fields: Vec<&str> = schedule.split_whitespace().collect();
    if fields.len() != 5 {
        anyhow::bail!(
            "cron schedule must have exactly 5 fields (got {}): \"{}\"",
            fields.len(),
            schedule
        );
    }
    // (min, max) for each field
    let ranges = [(0u32, 59u32), (0, 23), (1, 31), (1, 12), (0, 7)];
    let names = ["minute", "hour", "day", "month", "weekday"];
    for (i, (field, &(lo, hi))) in fields.iter().zip(ranges.iter()).enumerate() {
        validate_cron_field(field, lo, hi)
            .map_err(|e| anyhow::anyhow!("{} field: {e}", names[i]))?;
    }
    Ok(())
}

fn validate_cron_field(field: &str, min: u32, max: u32) -> Result<()> {
    if field == "*" {
        return Ok(());
    }
    for part in field.split(',') {
        validate_cron_part(part, min, max)?;
    }
    Ok(())
}

fn validate_cron_part(part: &str, min: u32, max: u32) -> Result<()> {
    // */n
    if let Some(step) = part.strip_prefix("*/") {
        let n: u32 = step
            .parse()
            .map_err(|_| anyhow::anyhow!("invalid step '{step}'"))?;
        if n == 0 {
            anyhow::bail!("step cannot be 0");
        }
        return Ok(());
    }
    // n-m or n-m/step
    if part.contains('-') {
        let (range_part, step_opt) = match part.split_once('/') {
            Some((r, s)) => {
                let n: u32 = s
                    .parse()
                    .map_err(|_| anyhow::anyhow!("invalid step '{s}'"))?;
                if n == 0 {
                    anyhow::bail!("step cannot be 0");
                }
                (r, Some(n))
            }
            None => (part, None),
        };
        let (a, b) = range_part
            .split_once('-')
            .ok_or_else(|| anyhow::anyhow!("invalid range '{range_part}'"))?;
        let lo: u32 = a
            .parse()
            .map_err(|_| anyhow::anyhow!("invalid value '{a}'"))?;
        let hi: u32 = b
            .parse()
            .map_err(|_| anyhow::anyhow!("invalid value '{b}'"))?;
        if lo < min || hi > max || lo > hi {
            anyhow::bail!("range {lo}-{hi} out of bounds ({min}-{max})");
        }
        let _ = step_opt;
        return Ok(());
    }
    // single value
    let n: u32 = part
        .parse()
        .map_err(|_| anyhow::anyhow!("invalid value '{part}'"))?;
    if n < min || n > max {
        anyhow::bail!("value {n} out of range ({min}-{max})");
    }
    Ok(())
}

// ---------------------------------------------------------------------------

pub fn cron_set_enabled(id: &str, enabled: bool) -> Result<()> {
    let (mut jobs, parse_ok) = crate::cron::load_cron_jobs();
    if !parse_ok {
        anyhow::bail!("cron.json5 has syntax errors - fix the file before modifying jobs");
    }
    let mut found = false;
    for job in &mut jobs {
        if job.id == id {
            job.enabled = enabled;
            job.updated_at_ms = Some(chrono::Utc::now().timestamp_millis() as u64);
            found = true;
            break;
        }
    }
    if !found {
        anyhow::bail!("cron job '{id}' not found");
    }
    crate::cron::save_cron_jobs(&jobs)?;

    // Notify the running gateway to reload cron jobs
    if let Ok(config) = config::load() {
        let port = config.gateway.port;
        let url = format!("http://127.0.0.1:{port}/api/v1/cron/reload");
        if let Ok(client) = reqwest::blocking::Client::builder()
            .timeout(std::time::Duration::from_secs(3))
            .build()
        {
            if let Err(e) = client.post(&url).send() {
                warn!("failed to notify gateway of cron reload: {e}");
            }
        }
    }

    if enabled {
        ok(&format!("cron job '{}' enabled", cyan(id)));
    } else {
        ok(&format!("cron job '{}' disabled", cyan(id)));
    }
    Ok(())
}

// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------

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

    #[test]
    fn valid_schedules() {
        assert!(validate_cron_schedule("* * * * *").is_ok());
        assert!(validate_cron_schedule("0 9 * * 1").is_ok());
        assert!(validate_cron_schedule("*/15 * * * *").is_ok());
        assert!(validate_cron_schedule("0 0 1 1 *").is_ok());
        assert!(validate_cron_schedule("0,30 8-18 * * 1-5").is_ok());
        assert!(validate_cron_schedule("0 12 * * 7").is_ok()); // weekday 7 = Sunday
    }

    #[test]
    fn wrong_field_count() {
        assert!(validate_cron_schedule("* * * *").is_err());
        assert!(validate_cron_schedule("* * * * * *").is_err());
        assert!(validate_cron_schedule("").is_err());
    }

    #[test]
    fn out_of_range_values() {
        assert!(validate_cron_schedule("60 * * * *").is_err()); // minute > 59
        assert!(validate_cron_schedule("* 24 * * *").is_err()); // hour > 23
        assert!(validate_cron_schedule("* * 0 * *").is_err()); // day < 1
        assert!(validate_cron_schedule("* * * 13 *").is_err()); // month > 12
        assert!(validate_cron_schedule("* * * * 8").is_err()); // weekday > 7
    }

    #[test]
    fn invalid_step_zero() {
        assert!(validate_cron_schedule("*/0 * * * *").is_err());
    }
}