pigeon-cli 0.4.0

use std::path::PathBuf;

use dialoguer::Input;

use crate::commands::job::report_upload;
use crate::commands::job::shared_wizard::ConfirmInput;
use crate::commands::keyring::store::Store;
use crate::commands::{FAILURE_EXIT_CODE, fail};
use crate::core::job::Job;
use crate::core::wizard::WizardInput;

use super::ImportJob;
use super::worker;

/// Resolves the rclone source, e.g. `source:media/`. A plain string, not a
/// pigeon bucket-config alias -- `import` never looks this up against the
/// keyring (ADR-0101). Structurally identical to
/// `shared_wizard::SourceBucketInput`'s flag/prompt/error shape; kept local
/// since no second consumer exists yet.
struct SourceInput {
    flag: Option<String>,
}

impl WizardInput for SourceInput {
    type Value = String;

    fn flag_value(&self) -> Option<Result<String, String>> {
        self.flag.clone().map(Ok)
    }

    fn prompt(&self) -> Result<String, String> {
        Input::<String>::new()
            .with_prompt("rclone source (e.g. 'source:media/')")
            .interact_text()
            .map_err(|err| format!("failed to read source: {err}"))
    }

    fn non_interactive_fallback(&self) -> Result<String, String> {
        Err("--source is required when not running interactively".to_string())
    }
}

/// Resolves the rclone destination, e.g. `destination:`. Same shape as
/// `SourceInput`.
struct DestinationInput {
    flag: Option<String>,
}

impl WizardInput for DestinationInput {
    type Value = String;

    fn flag_value(&self) -> Option<Result<String, String>> {
        self.flag.clone().map(Ok)
    }

    fn prompt(&self) -> Result<String, String> {
        Input::<String>::new()
            .with_prompt("rclone destination (e.g. 'destination:')")
            .interact_text()
            .map_err(|err| format!("failed to read destination: {err}"))
    }

    fn non_interactive_fallback(&self) -> Result<String, String> {
        Err("--destination is required when not running interactively".to_string())
    }
}

fn default_local_output() -> PathBuf {
    std::env::temp_dir().join("pigeon-job")
}

/// Where this run's rclone log (also serving as this job's report) and
/// transcript are written -- unlike every other job, not a staging area
/// for transferred data, since rclone transfers directly source ->
/// destination with no pigeon-side staging. Same shape as
/// `reduce::wizard::LocalOutputInput`.
struct LocalOutputInput {
    flag: Option<PathBuf>,
}

impl WizardInput for LocalOutputInput {
    type Value = PathBuf;

    fn flag_value(&self) -> Option<Result<PathBuf, String>> {
        self.flag.clone().map(Ok)
    }

    fn prompt(&self) -> Result<PathBuf, String> {
        let default = default_local_output();
        let value = Input::<String>::new()
            .with_prompt("Local directory this run's rclone log and transcript are written under")
            .default(default.display().to_string())
            .interact_text()
            .map_err(|err| format!("failed to read local output directory: {err}"))?;
        Ok(PathBuf::from(value))
    }

    fn non_interactive_fallback(&self) -> Result<PathBuf, String> {
        Ok(default_local_output())
    }
}

/// Entry point for `pigeon job run import` (ADR-0101).
#[allow(clippy::too_many_arguments)]
pub fn dispatch(
    source: Option<String>,
    destination: Option<String>,
    local_output: Option<PathBuf>,
    report_bucket: Option<String>,
    job_name: &'static str,
    yes: bool,
) -> i32 {
    let runtime = match tokio::runtime::Builder::new_multi_thread()
        .enable_all()
        .build()
    {
        Ok(runtime) => runtime,
        Err(err) => return fail(format!("failed to start async runtime: {err}")),
    };
    runtime.block_on(dispatch_async(
        source,
        destination,
        local_output,
        report_bucket,
        job_name,
        yes,
    ))
}

#[allow(clippy::too_many_arguments)]
async fn dispatch_async(
    source: Option<String>,
    destination: Option<String>,
    local_output: Option<PathBuf>,
    report_bucket: Option<String>,
    job_name: &'static str,
    yes: bool,
) -> i32 {
    // Held for this whole async fn's lifetime -- every early `return
    // fail(...)` below drops it, aborting the sampling task automatically
    // (ADR-0073).
    let _sampler =
        crate::observability::resources::ResourceSampler::spawn(std::time::Duration::from_secs(5));

    // Checked before any prompts, mirroring `pull_transform::wizard`'s
    // `check_ffmpeg_available()` call -- fail immediately on a missing
    // binary, not partway through a long-running `rclone copy` subprocess.
    if let Err(err) = worker::check_rclone_available().await {
        return fail(err);
    }

    let keyring_store_path = match Store::default_path() {
        Ok(path) => path,
        Err(err) => return fail(err),
    };
    let keyring_store = match Store::load(&keyring_store_path) {
        Ok(store) => store,
        Err(err) => return fail(err),
    };

    let source = match (SourceInput { flag: source }).resolve() {
        Ok(value) => value,
        Err(err) => return fail(err),
    };
    let destination = match (DestinationInput { flag: destination }).resolve() {
        Ok(value) => value,
        Err(err) => return fail(err),
    };
    let local_output = match (LocalOutputInput { flag: local_output }).resolve() {
        Ok(value) => value,
        Err(err) => return fail(err),
    };
    let (report_bucket_config, report_secret) =
        match report_upload::resolve(report_bucket, &keyring_store) {
            Ok(value) => value,
            Err(err) => return fail(err),
        };

    println!("Source:      {source}");
    println!("Destination: {destination}");

    match (ConfirmInput { yes }).resolve() {
        Ok(true) => {}
        Ok(false) => {
            println!("Cancelled.");
            return 0;
        }
        Err(err) => return fail(err),
    }

    if let Err(err) = std::fs::create_dir_all(&local_output) {
        return fail(format!(
            "failed to create {}: {err}",
            local_output.display()
        ));
    }

    let run_id = report_upload::generate_run_id();
    let run_prefix = report_upload::run_prefix(job_name, &run_id);
    let (transcript, transcript_path) = match report_upload::new_transcript(&local_output) {
        Ok(value) => value,
        Err(err) => return fail(err),
    };
    let log_path = local_output.join(format!("rclone-{run_id}.jsonl"));
    let log_path_for_err = log_path.clone();

    let job = ImportJob {
        source,
        destination,
        log_path,
    };
    let plan = match job.gather().await {
        Ok(plan) => plan,
        Err(err) => return fail(err),
    };

    let (exit_code, report_path) = match job.run(plan, 1, 1).await {
        Ok(summary) => {
            let message = format!(
                "Transferred {} file(s) ({} bytes), {} error(s).",
                summary.transferred, summary.bytes, summary.errors
            );
            report_upload::say(&transcript, message);
            let exit_code = if summary.errors > 0 {
                FAILURE_EXIT_CODE
            } else {
                0
            };
            (exit_code, summary.log_path)
        }
        Err(err) => (fail(err), log_path_for_err),
    };

    println!("Report: {}", report_path.display());

    report_upload::upload_run_artifacts(
        &report_bucket_config,
        &report_secret,
        &run_prefix,
        &report_path,
        &transcript_path,
    )
    .await;

    exit_code
}