//! One-shot write probe: PUT a tiny file, report the status, DELETE it.
use dr_plat::PlatformSecretStore;
use dr_sync::{RemoteBackend, RemoteId, RemotePath};
use dr_sync_nextcloud::{NextcloudBackend, SessionStore};

#[tokio::main(flavor = "current_thread")]
async fn main() {
    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info")).init();

    let store = SessionStore::open(Box::new(PlatformSecretStore::new()));
    let Some(session) = store.current() else {
        println!("no stored session");
        return;
    };
    let creds = match store.credentials(&session) {
        Ok(c) => c,
        Err(e) => {
            println!("credentials: {e}");
            return;
        }
    };
    println!("account: {} root={}", session.describe(), session.root);

    let backend = NextcloudBackend::new(&creds, &session.user_id).unwrap();

    // Read, which we know works.
    let dir = RemotePath::new(&session.root);
    match backend.list(&dir, None).await {
        Ok(v) => println!("READ  ok: {} entries", v.len()),
        Err(e) => println!("READ  FAILED: {e}"),
    }

    // What is actually in the derived folder on the server?
    {
        let dir = RemotePath::new(format!("{}/.darkroom-derived", session.root));
        match backend.list(&dir, None).await {
            Ok(entries) => {
                println!("\n[derived] {} entry/entries on the server:", entries.len());
                for e in &entries {
                    println!("    {:<28} {:>10} bytes", e.path.name(), e.size);
                }
            }
            Err(e) => println!("\n[derived] listing failed: {e}"),
        }
    }

    // Probe a file the sweep reported as 423 Locked: is it the file, the
    // range request, or the folder?
    {
        let c = dr_sync_nextcloud::http_client("DarkRoom").unwrap();
        let base = format!(
            "{}/remote.php/dav/files/{}",
            creds.server.trim_end_matches('/'),
            session.user_id
        );
        let f = "PhotosRaw/Darktable/20230629_no_name/20230629_0030.jpeg";
        let enc: String = f
            .split('/')
            .map(|seg| {
                seg.bytes()
                    .map(|b| match b {
                        b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9' | b'-' | b'_' | b'.' | b'~' => {
                            (b as char).to_string()
                        }
                        _ => format!("%{b:02X}"),
                    })
                    .collect::<String>()
            })
            .collect::<Vec<_>>()
            .join("/");
        let url = format!("{base}/{enc}");

        for (what, range) in [
            ("ranged 0-256k", Some("bytes=0-262143")),
            ("whole file", None),
        ] {
            let mut rq = c
                .get(&url)
                .basic_auth(&creds.login_name, Some(&creds.app_password));
            if let Some(r) = range {
                rq = rq.header("Range", r);
            }
            match rq.send().await {
                Ok(r) => println!("GET {what}: {}", r.status()),
                Err(e) => println!("GET {what}: transport {e}"),
            }
        }
    }

    // Raw HTTP, to see the status the connector maps away.
    {
        let url = format!(
            "{}/remote.php/dav/files/{}/{}/.darkroom-write-test",
            creds.server.trim_end_matches('/'),
            session.user_id,
            session.root
        );
        let c = dr_sync_nextcloud::http_client("DarkRoom").unwrap();
        match c
            .put(&url)
            .basic_auth(&creds.login_name, Some(&creds.app_password))
            .body("probe")
            .send()
            .await
        {
            Ok(r) => {
                println!("RAW PUT status: {}", r.status());
                let body = r.text().await.unwrap_or_default();
                let body = body.trim();
                if !body.is_empty() {
                    println!("RAW body: {}", &body[..body.len().min(400)]);
                }
            }
            Err(e) => println!("RAW PUT transport error: {e}"),
        }
    }

    // Is it the folder or the account? Probe the account root too: a
    // read-only *share* refuses writes inside it while the account writes
    // freely elsewhere, which is a different fix from a credential problem.
    {
        let c = dr_sync_nextcloud::http_client("DarkRoom").unwrap();
        let base = format!(
            "{}/remote.php/dav/files/{}",
            creds.server.trim_end_matches('/'),
            session.user_id
        );
        for (what, url) in [
            ("account root", format!("{base}/.darkroom-write-test")),
            (
                "library root",
                format!("{base}/{}/.darkroom-write-test", session.root),
            ),
        ] {
            match c
                .put(&url)
                .basic_auth(&creds.login_name, Some(&creds.app_password))
                .body("probe")
                .send()
                .await
            {
                Ok(r) => {
                    println!("PUT {what}: {}", r.status());
                    if r.status().is_success() {
                        let _ = c
                            .delete(&url)
                            .basic_auth(&creds.login_name, Some(&creds.app_password))
                            .send()
                            .await;
                    }
                }
                Err(e) => println!("PUT {what}: transport error {e}"),
            }
        }
    }

    // Write into the library root.
    let p = RemotePath::new(format!("{}/.darkroom-write-test", session.root));
    match backend
        .put(&p, b"darkroom write probe\n".to_vec(), None)
        .await
    {
        Ok(v) => {
            println!("WRITE ok: etag={}", v.as_str());
            match backend.delete(&RemoteId::Path(p.clone()), None).await {
                Ok(()) => println!("CLEAN ok"),
                Err(e) => println!("CLEAN failed (harmless): {e}"),
            }
        }
        Err(e) => println!("WRITE FAILED: {e}"),
    }
}