use std::io;
use std::path::PathBuf;
use thiserror::Error;
use crate::i18n::Language;
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct UserFacingError {
pub title: String,
pub reason: String,
pub suggestions: Vec<String>,
}
#[derive(Debug, Error)]
pub enum AppError {
#[error("repository cannot be empty")]
EmptyRepository,
#[error("remote path cannot be empty")]
EmptyRemotePath,
#[error("GitHub returned an unexpected response")]
UnexpectedApiResponse,
#[error("file entry is missing repository path")]
MissingRepositoryPath,
#[error("HTTP {status} for {url}")]
HttpStatus {
status: u16,
url: String,
detail: Option<String>,
},
#[error("request failed: {message}")]
Request {
url: Option<String>,
message: String,
},
#[error("json parse failed: {0}")]
Json(String),
#[error("invalid configuration: {0}")]
Config(String),
#[error("failed to write local path: {path}")]
Io {
path: PathBuf,
#[source]
source: io::Error,
},
#[error("invalid local path: {0}")]
InvalidPath(String),
}
pub fn classify_error(
error: &AppError,
token_present: bool,
language: Language,
) -> UserFacingError {
let title = match language {
Language::En => "✖ Download failed".to_string(),
Language::Zh => "✖ 下载失败".to_string(),
};
match (language, error) {
(Language::Zh, AppError::HttpStatus { status, detail, .. })
if *status == 401 || *status == 403 || *status == 429 =>
{
let mut suggestions = vec![
"设置环境变量 GITHUB_TOKEN 或 GH_TOKEN".to_string(),
"或使用 --token <token> 重新执行".to_string(),
];
if !token_present {
suggestions.push("如果直连 GitHub 不稳定，可检查 --proxy-base 是否可访问".to_string());
}
UserFacingError {
title,
reason: detail
.clone()
.unwrap_or_else(|| format!("GitHub 认证失败或触发限流（HTTP {}）", status)),
suggestions,
}
}
(Language::En, AppError::HttpStatus { status, detail, .. })
if *status == 401 || *status == 403 || *status == 429 =>
{
let mut suggestions = vec![
"Set GITHUB_TOKEN or GH_TOKEN in the environment".to_string(),
"Or rerun with --token <token>".to_string(),
];
if !token_present {
suggestions.push(
"If direct GitHub access is unstable, verify that --proxy-base is reachable"
.to_string(),
);
}
UserFacingError {
title,
reason: detail.clone().unwrap_or_else(|| {
format!(
"GitHub authentication failed or the rate limit was hit (HTTP {})",
status
)
}),
suggestions,
}
}
(Language::Zh, AppError::HttpStatus { status, detail, .. }) if *status == 404 => {
UserFacingError {
title,
reason: detail.clone().unwrap_or_else(|| {
"未找到指定的仓库、分支或远端路径，或者当前凭证无法访问该私有仓库".to_string()
}),
suggestions: vec![
"检查 owner/repo 是否正确".to_string(),
"检查 --ref 指向的分支、tag 或 commit 是否存在".to_string(),
"检查远端路径大小写是否正确".to_string(),
"如果是私有仓库，请提供 --token 或设置 GITHUB_TOKEN / GH_TOKEN".to_string(),
],
}
}
(Language::En, AppError::HttpStatus { status, detail, .. }) if *status == 404 => {
UserFacingError {
title,
reason: detail.clone().unwrap_or_else(|| {
"The repository, ref, or remote path was not found, or the current credentials cannot access the private repository".to_string()
}),
suggestions: vec![
"Check whether owner/repo is correct".to_string(),
"Check whether --ref points to an existing branch, tag, or commit".to_string(),
"Check the remote path and its letter casing".to_string(),
"If this is a private repository, provide --token or set GITHUB_TOKEN / GH_TOKEN".to_string(),
],
}
}
(Language::Zh, AppError::Request { .. }) => UserFacingError {
title,
reason: "连接 GitHub 或代理失败".to_string(),
suggestions: vec![
"检查当前网络是否可访问 GitHub".to_string(),
"如果使用了 --proxy-base，请确认代理地址可访问".to_string(),
"稍后重试，或提供 --token 降低匿名请求失败概率".to_string(),
],
},
(Language::En, AppError::Request { .. }) => UserFacingError {
title,
reason: "Failed to connect to GitHub or the configured proxy".to_string(),
suggestions: vec![
"Check whether the current network can reach GitHub".to_string(),
"If you are using --proxy-base, verify that the proxy URL is reachable".to_string(),
"Try again later, or provide --token to reduce anonymous request failures".to_string(),
],
},
(Language::Zh, AppError::Io { path, .. }) => UserFacingError {
title,
reason: format!("无法写入本地路径 {}", path.display()),
suggestions: vec![
"检查目标目录是否有写权限".to_string(),
"确认磁盘空间充足，且目标文件未被其他程序占用".to_string(),
],
},
(Language::En, AppError::Io { path, .. }) => UserFacingError {
title,
reason: format!("Failed to write local path {}", path.display()),
suggestions: vec![
"Check whether the target directory is writable".to_string(),
"Confirm that disk space is available and the file is not locked by another program".to_string(),
],
},
(Language::Zh, AppError::UnexpectedApiResponse) => UserFacingError {
title,
reason: "GitHub 返回了无法识别的响应格式".to_string(),
suggestions: vec![
"稍后重试，或检查仓库路径是否正确".to_string(),
"如果问题持续出现，请附上命令和仓库信息进行排查".to_string(),
],
},
(Language::En, AppError::UnexpectedApiResponse) => UserFacingError {
title,
reason: "GitHub returned a response format that the CLI could not understand".to_string(),
suggestions: vec![
"Try again later, or verify that the repository path is correct".to_string(),
"If the issue persists, capture the command and repository details for debugging".to_string(),
],
},
(Language::Zh, AppError::EmptyRepository) => UserFacingError {
title,
reason: "仓库参数不能为空".to_string(),
suggestions: vec!["请按 OWNER/REPO 格式提供仓库参数".to_string()],
},
(Language::En, AppError::EmptyRepository) => UserFacingError {
title,
reason: "The repository argument cannot be empty".to_string(),
suggestions: vec!["Provide the repository in OWNER/REPO format".to_string()],
},
(Language::Zh, AppError::EmptyRemotePath) => UserFacingError {
title,
reason: "远端路径参数不能为空".to_string(),
suggestions: vec!["请提供仓库内文件或目录路径".to_string()],
},
(Language::En, AppError::EmptyRemotePath) => UserFacingError {
title,
reason: "The remote path argument cannot be empty".to_string(),
suggestions: vec!["Provide a file or directory path inside the repository".to_string()],
},
(Language::Zh, AppError::MissingRepositoryPath) => UserFacingError {
title,
reason: "GitHub 返回的文件条目缺少仓库路径".to_string(),
suggestions: vec!["稍后重试，或检查目标仓库路径是否正常".to_string()],
},
(Language::En, AppError::MissingRepositoryPath) => UserFacingError {
title,
reason: "GitHub returned a file entry without its repository path".to_string(),
suggestions: vec!["Try again later, or verify that the target repository path is valid".to_string()],
},
(Language::Zh, AppError::Json(message)) => UserFacingError {
title,
reason: format!("解析 GitHub 响应失败：{}", message),
suggestions: vec!["稍后重试，或检查代理返回内容是否被修改".to_string()],
},
(Language::En, AppError::Json(message)) => UserFacingError {
title,
reason: format!("Failed to parse the GitHub response: {}", message),
suggestions: vec!["Try again later, or verify that the proxy response was not altered".to_string()],
},
(Language::Zh, AppError::Config(message)) => UserFacingError {
title,
reason: format!("配置文件无效：{}", message),
suggestions: vec![
"检查 --config 指向的文件是否存在且可读".to_string(),
"确认配置文件使用 TOML 格式，且只包含 token、api_base、proxy_base、prefix_mode、concurrency、lang".to_string(),
"如果不想使用配置文件，请修正该文件或移除 --config".to_string(),
],
},
(Language::En, AppError::Config(message)) => UserFacingError {
title,
reason: format!("Configuration file error: {}", message),
suggestions: vec![
"Check whether the file passed to --config exists and is readable".to_string(),
"Confirm that the file uses TOML and only contains token, api_base, proxy_base, prefix_mode, concurrency, and lang".to_string(),
"If you do not want to use a config file, fix it or remove --config".to_string(),
],
},
(Language::Zh, AppError::InvalidPath(message)) => UserFacingError {
title,
reason: format!("本地路径无效：{}", message),
suggestions: vec!["检查本地路径是否存在非法字符，或家目录是否可解析".to_string()],
},
(Language::En, AppError::InvalidPath(message)) => UserFacingError {
title,
reason: format!("Invalid local path: {}", message),
suggestions: vec![
"Check whether the local path contains invalid characters or whether the home directory can be resolved".to_string(),
],
},
(Language::Zh, AppError::HttpStatus { status, detail, .. }) => UserFacingError {
title,
reason: detail
.clone()
.unwrap_or_else(|| format!("GitHub 请求失败（HTTP {}）", status)),
suggestions: vec![
"稍后重试，或检查仓库与路径是否正确".to_string(),
"如果问题持续出现，请确认代理和认证配置".to_string(),
],
},
(Language::En, AppError::HttpStatus { status, detail, .. }) => UserFacingError {
title,
reason: detail
.clone()
.unwrap_or_else(|| format!("GitHub request failed (HTTP {})", status)),
suggestions: vec![
"Try again later, or verify that the repository and path are correct".to_string(),
"If the issue persists, check the proxy and authentication settings".to_string(),
],
},
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn classify_rate_limit_error_suggests_token() {
let error = AppError::HttpStatus {
status: 403,
url: "https://api.github.com".to_string(),
detail: Some("API rate limit exceeded".to_string()),
};
let user_error = classify_error(&error, false, Language::En);
assert!(
user_error
.suggestions
.iter()
.any(|item| item.contains("GITHUB_TOKEN"))
);
}
}