smugmug-cli 0.5.1

use anyhow::Result;
use base64::{Engine as _, engine::general_purpose};
use md5::Context;
use reqwest::header::{AUTHORIZATION, CONTENT_LENGTH, CONTENT_TYPE, HeaderMap, HeaderValue};
use serde::{Deserialize, Serialize};
use std::path::Path;
use tokio::fs;

#[derive(Debug, Serialize, Deserialize)]
pub struct UploadResult {
    pub image_key: String,
    pub image_uri: String,
    pub status_code: u16,
}

#[derive(Debug, Deserialize)]
struct UploadResponse {
    stat: String,
    #[serde(rename = "Image")]
    image: ImageInfo,
}

#[derive(Debug, Deserialize)]
struct ImageInfo {
    #[serde(rename = "ImageUri")]
    image_uri: String,
}

/// A file to upload: its bytes and the name and type SmugMug records.
#[derive(Debug, Clone)]
pub struct UploadPayload {
    /// Shared, so retries don't copy the file.
    pub data: bytes::Bytes,
    pub file_name: String,
    pub mime_type: String,
}

impl UploadPayload {
    /// Read the file at `file_path`, named and typed after the path.
    pub async fn from_path(file_path: &Path) -> Result<Self> {
        let data = fs::read(file_path).await?.into();
        let file_name = file_path
            .file_name()
            .and_then(|n| n.to_str())
            .unwrap_or("image")
            .to_string();
        let mime_type = mime_guess::from_path(file_path)
            .first_or_octet_stream()
            .to_string();
        Ok(UploadPayload {
            data,
            file_name,
            mime_type,
        })
    }
}

pub async fn upload_image(
    client: &crate::api::SmugMugClient,
    album_uri: &str,
    payload: &UploadPayload,
) -> Result<UploadResult> {
    send_upload(client, "X-Smug-AlbumUri", album_uri, payload).await
}

/// Replace the file content of an existing image, identified by its image URI
/// (e.g. `/api/v2/image/<key>`). This uploads new bytes onto the existing
/// image record, keeping its album placement, keywords, and other metadata,
/// instead of creating a new image (which SmugMug rejects with 409 if an
/// image with the same filename already exists in the album).
pub async fn replace_image(
    client: &crate::api::SmugMugClient,
    image_uri: &str,
    payload: &UploadPayload,
) -> Result<UploadResult> {
    send_upload(client, "X-Smug-ImageUri", image_uri, payload).await
}

/// Upload endpoint for SmugMug's Library ("All Media"): media uploaded here
/// isn't placed in any album/gallery. Not in SmugMug's public API docs;
/// discovered from the web uploader. It takes a multipart form (`Media`,
/// `ByteCount`, `Sha256Sum`, optional `Filepath`/`Title`/`Caption`/
/// `Keywords`) and answers 201 with the standard v2 envelope
/// (`{"Response":{"Image":{...}},"Code":201}`).
pub const LIBRARY_UPLOAD_URL: &str = "https://upload.smugmug.com/api/v2/library";

#[derive(Debug, Deserialize)]
struct LibraryUploadResponse {
    #[serde(rename = "Response")]
    response: LibraryUploadResponseBody,
}

#[derive(Debug, Deserialize)]
struct LibraryUploadResponseBody {
    #[serde(rename = "Image")]
    image: LibraryImage,
}

#[derive(Debug, Deserialize)]
struct LibraryImage {
    #[serde(rename = "ImageKey")]
    image_key: String,
    #[serde(rename = "Uri")]
    uri: String,
}

/// Upload a file to the Library (no album). `filepath` is sent as the
/// `Filepath` field, which SmugMug describes as "the relative path to the
/// photo or video itself on the uploader's file system".
#[allow(dead_code)] // wired into the uploader once Library uploads are the default
pub async fn upload_to_library(
    client: &crate::api::SmugMugClient,
    file_path: &Path,
    filepath: &str,
) -> Result<UploadResult> {
    let (status_code, body_text) =
        send_library_upload(client, LIBRARY_UPLOAD_URL, file_path, filepath).await?;
    parse_library_upload_response(status_code, &body_text)
}

/// Send the Library upload request and return the HTTP status and raw body,
/// without interpreting either.
pub async fn send_library_upload(
    client: &crate::api::SmugMugClient,
    upload_url: &str,
    file_path: &Path,
    filepath: &str,
) -> Result<(u16, String)> {
    use reqwest::multipart::{Form, Part};
    use sha2::{Digest, Sha256};

    let file_data = fs::read(file_path).await?;
    let byte_count = file_data.len();
    let sha256_base64 = general_purpose::STANDARD.encode(Sha256::digest(&file_data));

    let mime_type = mime_guess::from_path(file_path)
        .first_or_octet_stream()
        .to_string();
    let filename = file_path
        .file_name()
        .and_then(|n| n.to_str())
        .unwrap_or("image")
        .to_string();

    let form = Form::new()
        .text("ByteCount", byte_count.to_string())
        .text("Filepath", filepath.to_string())
        .text("Sha256Sum", sha256_base64)
        .part(
            "Media",
            Part::bytes(file_data)
                .file_name(filename)
                .mime_str(&mime_type)?,
        );

    // Multipart fields aren't part of the OAuth1 signature base string, so
    // the plain POST signature for the URL is sufficient.
    let oauth_header = client.build_oauth_header("POST", upload_url);

    let response = reqwest::Client::new()
        .post(upload_url)
        .header(AUTHORIZATION, oauth_header)
        .header("Accept", "application/json")
        .multipart(form)
        .send()
        .await?;

    let status_code = response.status().as_u16();
    Ok((status_code, response.text().await?))
}

pub fn parse_library_upload_response(status_code: u16, body_text: &str) -> Result<UploadResult> {
    if !(200..300).contains(&status_code) {
        anyhow::bail!(
            "Library upload failed with status {}: {}",
            status_code,
            body_text
        );
    }

    let parsed: LibraryUploadResponse = serde_json::from_str(body_text)?;
    Ok(UploadResult {
        image_key: parsed.response.image.image_key,
        image_uri: parsed.response.image.uri,
        status_code,
    })
}

async fn send_upload(
    client: &crate::api::SmugMugClient,
    target_header: &'static str,
    target_uri: &str,
    payload: &UploadPayload,
) -> Result<UploadResult> {
    let mut context = Context::new();
    context.consume(&payload.data);
    let md5_base64 = general_purpose::STANDARD.encode(context.finalize().0);
    let headers = upload_headers(
        client,
        target_header,
        target_uri,
        payload.data.len() as u64,
        &md5_base64,
        &payload.mime_type,
        &payload.file_name,
    )?;
    let response = client
        .http()
        .post(UPLOAD_URL)
        .headers(headers)
        .body(payload.data.clone())
        .send()
        .await?;
    read_upload_response(response).await
}

/// SmugMug's upload endpoint.
const UPLOAD_URL: &str = "https://upload.smugmug.com/";

/// Who an upload goes to: a new image in an album, or new content for an
/// existing image.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum UploadTarget<'a> {
    Album(&'a str),
    ReplaceImage(&'a str),
}

/// A file uploaded straight from disk, without holding it in memory.
#[derive(Debug, Clone)]
pub struct FileUpload<'a> {
    pub path: &'a Path,
    /// Size of the file, as sent in Content-Length.
    pub size: u64,
    /// Hex MD5 of the file, computed when it was read.
    pub md5_hex: &'a str,
    /// Name SmugMug records (usually the file's own).
    pub file_name: &'a str,
}

/// Upload a file from disk, streaming its contents.
pub async fn upload_file(
    client: &crate::api::SmugMugClient,
    target: UploadTarget<'_>,
    file: &FileUpload<'_>,
) -> Result<UploadResult> {
    let (target_header, target_uri) = match target {
        UploadTarget::Album(uri) => ("X-Smug-AlbumUri", uri),
        UploadTarget::ReplaceImage(uri) => ("X-Smug-ImageUri", uri),
    };
    let md5 = hex::decode(file.md5_hex)?;
    let mime_type = mime_guess::from_path(file.path)
        .first_or_octet_stream()
        .to_string();
    let headers = upload_headers(
        client,
        target_header,
        target_uri,
        file.size,
        &general_purpose::STANDARD.encode(md5),
        &mime_type,
        file.file_name,
    )?;
    let reader = fs::File::open(file.path).await?;
    let body = reqwest::Body::wrap_stream(tokio_util::io::ReaderStream::with_capacity(
        reader,
        256 * 1024,
    ));
    let response = client
        .http()
        .post(UPLOAD_URL)
        .headers(headers)
        .body(body)
        .send()
        .await?;
    read_upload_response(response).await
}

/// Upload bytes held in memory (a JPEG rendered from a RAW file).
pub async fn upload_bytes(
    client: &crate::api::SmugMugClient,
    target: UploadTarget<'_>,
    payload: &UploadPayload,
) -> Result<UploadResult> {
    match target {
        UploadTarget::Album(uri) => upload_image(client, uri, payload).await,
        UploadTarget::ReplaceImage(uri) => replace_image(client, uri, payload).await,
    }
}

fn upload_headers(
    client: &crate::api::SmugMugClient,
    target_header: &'static str,
    target_uri: &str,
    size: u64,
    md5_base64: &str,
    mime_type: &str,
    filename: &str,
) -> Result<HeaderMap> {
    let oauth_header = client.build_oauth_header("POST", UPLOAD_URL);
    let mut headers = HeaderMap::new();
    headers.insert(AUTHORIZATION, HeaderValue::from_str(&oauth_header)?);
    headers.insert(CONTENT_LENGTH, HeaderValue::from(size));
    headers.insert(CONTENT_TYPE, HeaderValue::from_str(mime_type)?);
    headers.insert("Content-MD5", HeaderValue::from_str(md5_base64)?);
    headers.insert(target_header, HeaderValue::from_str(target_uri)?);
    headers.insert("X-Smug-FileName", header_text(filename)?);
    headers.insert("X-Smug-Title", header_text(filename)?);
    headers.insert("X-Smug-ResponseType", HeaderValue::from_static("JSON"));
    headers.insert("X-Smug-Version", HeaderValue::from_static("v2"));
    headers.insert("Accept", HeaderValue::from_static("application/json"));
    Ok(headers)
}

/// A header value for a file name. `HeaderValue::from_str` takes ASCII
/// only, which would fail every upload of a file named with accents or
/// emoji; the UTF-8 bytes are sent as they are instead.
fn header_text(text: &str) -> Result<HeaderValue> {
    Ok(HeaderValue::from_bytes(text.as_bytes())?)
}

/// SmugMug refused an upload with an HTTP error.
#[derive(Debug, thiserror::Error)]
#[error("Upload failed with status {status}: {body}")]
pub struct UploadRejected {
    pub status: u16,
    pub body: String,
}

impl UploadRejected {
    /// Refused for the file itself (too big, unsupported), so trying again
    /// won't help until the file changes. Not auth, rate-limit or
    /// conflict errors, which are about the account or the request.
    pub fn is_permanent(&self) -> bool {
        matches!(self.status, 400 | 413 | 415 | 422)
    }
}

async fn read_upload_response(response: reqwest::Response) -> Result<UploadResult> {
    let status = response.status();
    let status_code = status.as_u16();
    let body_text = response.text().await?;

    if !status.is_success() {
        return Err(UploadRejected {
            status: status_code,
            body: body_text,
        }
        .into());
    }

    let upload_response: UploadResponse = serde_json::from_str(&body_text)?;

    if upload_response.stat != "ok" {
        anyhow::bail!("Upload failed: {}", body_text);
    }

    // Extract image key from URI (format: /api/v2/album/<key>/image/<key>-0)
    let image_key = upload_response
        .image
        .image_uri
        .split('/')
        .next_back()
        .unwrap_or("")
        .to_string();

    Ok(UploadResult {
        image_key,
        image_uri: upload_response.image.image_uri,
        status_code,
    })
}

#[cfg(test)]
mod tests {
    use super::*;
    use std::io::Write;
    use tempfile::NamedTempFile;

    fn create_test_client() -> crate::api::SmugMugClient {
        crate::api::SmugMugClient::new(
            "test_api_key".to_string(),
            "test_api_secret".to_string(),
            "test_access_token".to_string(),
            "test_access_token_secret".to_string(),
        )
    }

    #[test]
    fn test_upload_result_structure() {
        let result = UploadResult {
            image_key: "IMG123".to_string(),
            image_uri: "/api/v2/image/IMG123".to_string(),
            status_code: 200,
        };

        assert_eq!(result.image_key, "IMG123");
        assert_eq!(result.image_uri, "/api/v2/image/IMG123");
        assert_eq!(result.status_code, 200);
    }

    #[test]
    fn test_upload_result_serialization() {
        let result = UploadResult {
            image_key: "IMG123".to_string(),
            image_uri: "/api/v2/image/IMG123".to_string(),
            status_code: 200,
        };

        let json = serde_json::to_string(&result).unwrap();
        assert!(json.contains("\"image_key\":\"IMG123\""));
        assert!(json.contains("\"image_uri\":\"/api/v2/image/IMG123\""));
        assert!(json.contains("\"status_code\":200"));
    }

    #[test]
    fn test_upload_result_deserialization() {
        let json = r#"{
            "image_key": "IMG123",
            "image_uri": "/api/v2/image/IMG123",
            "status_code": 200
        }"#;

        let result: UploadResult = serde_json::from_str(json).unwrap();
        assert_eq!(result.image_key, "IMG123");
        assert_eq!(result.image_uri, "/api/v2/image/IMG123");
        assert_eq!(result.status_code, 200);
    }

    #[tokio::test]
    async fn test_upload_image_creates_correct_headers() {
        // Create a temporary test file
        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(temp_file, "test image data").unwrap();
        let file_path = temp_file.path();

        let _client = create_test_client();

        let mut server = mockito::Server::new_async().await;
        let _mock = server
            .mock("POST", "/")
            .match_header(
                "authorization",
                mockito::Matcher::Regex("OAuth.*".to_string()),
            )
            .match_header("content-type", mockito::Matcher::Any)
            .match_header("content-md5", mockito::Matcher::Any)
            .match_header("x-smug-albumuri", "/api/v2/album/ABC123")
            .match_header("x-smug-responsetype", "JSON")
            .match_header("x-smug-version", "v2")
            .with_status(200)
            .with_header("content-type", "application/json")
            .with_body(
                r#"{
                "stat": "ok",
                "Image": {
                    "ImageUri": "/api/v2/album/ABC123/image/IMG123-0"
                }
            }"#,
            )
            .create_async()
            .await;

        // In a properly architected version, we'd inject the upload URL and test the actual call
    }

    #[tokio::test]
    async fn test_upload_image_mock_success() {
        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(temp_file, "test image data").unwrap();
        let _file_path = temp_file.path();

        let _client = create_test_client();

        let mut server = mockito::Server::new_async().await;
        let _mock = server
            .mock("POST", "/")
            .with_status(200)
            .with_header("content-type", "application/json")
            .with_body(
                r#"{
                "stat": "ok",
                "Image": {
                    "ImageUri": "/api/v2/album/ABC123/image/IMG123-0"
                }
            }"#,
            )
            .create_async()
            .await;
    }

    #[tokio::test]
    async fn test_upload_image_mock_failure() {
        let mut temp_file = NamedTempFile::new().unwrap();
        writeln!(temp_file, "test image data").unwrap();
        let _file_path = temp_file.path();

        let _client = create_test_client();

        let mut server = mockito::Server::new_async().await;
        let _mock = server
            .mock("POST", "/")
            .with_status(400)
            .with_body("Bad Request: Invalid album URI")
            .create_async()
            .await;
    }

    #[test]
    fn test_upload_response_deserialization() {
        let json = r#"{
            "stat": "ok",
            "Image": {
                "ImageUri": "/api/v2/album/ABC123/image/IMG123-0"
            }
        }"#;

        let response: UploadResponse = serde_json::from_str(json).unwrap();
        assert_eq!(response.stat, "ok");
        assert_eq!(
            response.image.image_uri,
            "/api/v2/album/ABC123/image/IMG123-0"
        );
    }

    #[test]
    fn test_image_key_extraction() {
        let image_uri = "/api/v2/album/ABC123/image/IMG123-0";
        let image_key = image_uri.split('/').last().unwrap_or("");
        assert_eq!(image_key, "IMG123-0");
    }

    #[tokio::test]
    async fn test_file_reading_and_md5() {
        // Create a temporary test file with known content
        let mut temp_file = NamedTempFile::new().unwrap();
        let test_data = b"Hello, SmugMug!";
        temp_file.write_all(test_data).unwrap();
        temp_file.flush().unwrap();

        let file_path = temp_file.path();

        // Read file and calculate MD5
        let file_data = fs::read(file_path).await.unwrap();
        assert_eq!(file_data, test_data);

        let mut context = Context::new();
        context.consume(&file_data);
        let md5_hash = context.finalize();
        let md5_base64 = general_purpose::STANDARD.encode(md5_hash.0);

        // Verify MD5 is not empty
        assert!(!md5_base64.is_empty());
    }

    #[test]
    fn test_mime_type_detection() {
        // Test various file extensions
        let jpg_path = Path::new("test.jpg");
        let mime_jpg = mime_guess::from_path(jpg_path).first_or_octet_stream();
        assert_eq!(mime_jpg.to_string(), "image/jpeg");

        let png_path = Path::new("test.png");
        let mime_png = mime_guess::from_path(png_path).first_or_octet_stream();
        assert_eq!(mime_png.to_string(), "image/png");

        // Test that unknown extensions have a default MIME type
        let unknown_path = Path::new("test.unknown123");
        let mime_unknown = mime_guess::from_path(unknown_path).first_or_octet_stream();
        assert_eq!(mime_unknown.to_string(), "application/octet-stream");
    }

    #[tokio::test]
    async fn test_upload_response_stat_not_ok() {
        let json = r#"{
            "stat": "fail",
            "message": "Upload failed",
            "code": 1
        }"#;

        // If we were to try to parse this as UploadResponse, it would fail
        // because the Image field is missing. This tests that error handling works.
        let result = serde_json::from_str::<UploadResponse>(json);
        assert!(result.is_err());
    }

    #[tokio::test]
    async fn test_library_upload_sends_multipart_fields() {
        use sha2::{Digest, Sha256};

        let mut temp_file = tempfile::Builder::new().suffix(".jpg").tempfile().unwrap();
        let test_data = b"library test data";
        temp_file.write_all(test_data).unwrap();
        temp_file.flush().unwrap();
        let file_name = temp_file
            .path()
            .file_name()
            .unwrap()
            .to_str()
            .unwrap()
            .to_string();
        let expected_sha = general_purpose::STANDARD.encode(Sha256::digest(test_data));
        assert_eq!(expected_sha.len(), 44);

        let mut server = mockito::Server::new_async().await;
        let mock = server
            .mock("POST", "/api/v2/library")
            .match_header(
                "authorization",
                mockito::Matcher::Regex("^OAuth .*oauth_signature=".to_string()),
            )
            .match_header(
                "content-type",
                mockito::Matcher::Regex("^multipart/form-data; boundary=".to_string()),
            )
            .match_body(mockito::Matcher::AllOf(vec![
                mockito::Matcher::Regex(format!(
                    "name=\"ByteCount\"\r\n\r\n{}\r\n",
                    test_data.len()
                )),
                mockito::Matcher::Regex(format!(
                    "name=\"Sha256Sum\"\r\n\r\n{}\r\n",
                    regex_escape(&expected_sha)
                )),
                mockito::Matcher::Regex("name=\"Filepath\"\r\n\r\n2024/Trip/a.jpg\r\n".to_string()),
                mockito::Matcher::Regex(format!(
                    "name=\"Media\"; filename=\"{}\"\r\nContent-Type: image/jpeg",
                    regex_escape(&file_name)
                )),
                mockito::Matcher::Regex("library test data".to_string()),
            ]))
            .with_status(201)
            .with_body(LIBRARY_RESPONSE_FIXTURE)
            .create_async()
            .await;

        let client = create_test_client();
        let url = format!("{}/api/v2/library", server.url());
        let (status, body) =
            send_library_upload(&client, &url, temp_file.path(), "2024/Trip/a.jpg")
                .await
                .unwrap();

        mock.assert_async().await;
        assert_eq!(status, 201);
        let result = parse_library_upload_response(status, &body).unwrap();
        assert_eq!(result.image_key, "5DftXbZ");
        assert_eq!(result.image_uri, "/api/v2/image/5DftXbZ-0");
    }

    #[test]
    fn test_parse_library_upload_response_error_status() {
        let err = parse_library_upload_response(401, r#"{"Code":401,"Message":"Unauthorized"}"#)
            .unwrap_err();
        assert!(err.to_string().contains("401"));
    }

    fn regex_escape(s: &str) -> String {
        s.chars()
            .flat_map(|c| {
                if "\\.+*?()|[]{}^$".contains(c) {
                    vec!['\\', c]
                } else {
                    vec![c]
                }
            })
            .collect()
    }

    /// Trimmed from a real 201 response of the web uploader's Library upload.
    const LIBRARY_RESPONSE_FIXTURE: &str = r#"{
        "Response": {
            "Uri": "/api/v2/image/5DftXbZ-0",
            "Locator": "Image",
            "LocatorType": "Object",
            "Image": {
                "FileName": "darth copy.png",
                "Processing": true,
                "ImageKey": "5DftXbZ",
                "ArchivedMD5": "fec6679b041962097bfd6a4fea03ab8d",
                "PublishedTo": [],
                "Uri": "/api/v2/image/5DftXbZ-0"
            },
            "EndpointType": "Image"
        },
        "Code": 201,
        "Message": "Created"
    }"#;

    #[tokio::test]
    async fn test_upload_invalid_file() {
        let _client = create_test_client();
        let non_existent_path = Path::new("/tmp/this_file_does_not_exist_12345.jpg");

        // Attempting to read a non-existent file should fail
        let result = fs::read(non_existent_path).await;
        assert!(result.is_err());
    }
}