use std::env::consts::EXE_EXTENSION;
use std::ffi::OsStr;
use std::ops::Deref;
use std::path::{Path, PathBuf};
use std::process::Stdio;
use std::str::FromStr;
use std::sync::Arc;

use anyhow::{Context, bail};
use itertools::{Either, Itertools};
use prek_consts::env_vars::EnvVars;
use prek_consts::prepend_paths;
use tracing::debug;

use crate::cli::reporter::HookInstallReporter;
use crate::cli::run::HookRunReporter;
use crate::fs::is_executable;
use crate::git::GitCommandExt;
use crate::hook::{Hook, InstallInfo, InstalledHook};
use crate::languages::LanguageBackend;
use crate::languages::rust::RustRequest;
use crate::languages::rust::installer::RustInstaller;
use crate::languages::rust::rustup::Rustup;
use crate::languages::rust::version::{Channel, EXTRA_KEY_CHANNEL};
use crate::languages::version::LanguageRequest;
use crate::process::Cmd;
use crate::run::run_by_batch;
use crate::store::{CacheBucket, Store, ToolBucket};

fn format_cargo_dependency(dep: &str) -> String {
    let (name, version) = dep.split_once(':').unwrap_or((dep, ""));
    if version.is_empty() {
        format!("{name}@*")
    } else {
        format!("{name}@{version}")
    }
}

#[derive(Debug, Eq, PartialEq)]
enum CargoCliDependency {
    Crate {
        name: String,
        version: Option<String>,
    },
    Git {
        url: String,
        tag: Option<String>,
        package: Option<String>,
    },
}

impl FromStr for CargoCliDependency {
    type Err = anyhow::Error;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let is_url = s.starts_with("http://") || s.starts_with("https://");
        if is_url {
            let scheme_end = s
                .find("://")
                .map(|idx| idx + 3)
                .with_context(|| format!("Invalid git URL `{s}`"))?;
            let rest = &s[scheme_end..];

            let parts: Vec<&str> = rest.rsplitn(3, ':').collect();
            let (url_without_scheme, tag, package) = match parts.as_slice() {
                [url] => (*url, None, None),
                [tag, url] => {
                    if tag.is_empty() {
                        bail!(
                            "Git CLI dependency `{s}` contains an empty tag; use `cli:<url>`, `cli:<url>:<tag>`, or `cli:<url>:<tag>:<package>`"
                        );
                    }
                    (*url, Some(*tag), None)
                }
                [package, tag, url] => {
                    if package.is_empty() {
                        bail!(
                            "Git CLI dependency `{s}` must specify a non-empty package when using `cli:<url>:<tag>:<package>`"
                        );
                    }
                    let tag = if tag.is_empty() { None } else { Some(*tag) };
                    (*url, tag, Some(*package))
                }
                _ => unreachable!(),
            };

            let url = format!("{}{}", &s[..scheme_end], url_without_scheme);
            Ok(CargoCliDependency::Git {
                url,
                tag: tag.map(ToString::to_string),
                package: package.map(ToString::to_string),
            })
        } else {
            let (name, version) = if let Some((pkg, ver)) = s.rsplit_once(':') {
                (pkg.to_string(), Some(ver.to_string()))
            } else {
                (s.to_string(), None)
            };

            Ok(CargoCliDependency::Crate { name, version })
        }
    }
}

impl CargoCliDependency {
    fn to_cargo_args(&self) -> Vec<&str> {
        let mut args: Vec<&str> = Vec::with_capacity(2);
        match self {
            CargoCliDependency::Crate { name, version } => {
                args.push(name);
                if let Some(version) = version {
                    args.push("--version");
                    args.push(version);
                }
            }
            CargoCliDependency::Git { url, tag, package } => {
                args.push("--git");
                args.push(url);
                if let Some(tag) = tag {
                    args.push("--tag");
                    args.push(tag);
                }
                if let Some(package) = package {
                    args.push(package);
                }
            }
        }

        args
    }
}

/// Find the package directory that produces the given binary.
/// Returns (`package_dir`, `package_name`, `is_workspace`).
async fn find_package_dir(
    repo: &Path,
    binary_name: &str,
    cargo: Option<&Path>,
    cargo_home: Option<&Path>,
    new_path: Option<&OsStr>,
) -> anyhow::Result<Option<(PathBuf, String, bool)>> {
    let cargo = cargo.unwrap_or(Path::new("cargo"));

    let mut cmd = Cmd::new(cargo);
    if let Some(new_path) = new_path {
        cmd.env(EnvVars::PATH, new_path);
    }
    if let Some(cargo_home) = cargo_home {
        cmd.env(EnvVars::CARGO_HOME, cargo_home);
    }
    let output = cmd
        .arg("metadata")
        .arg("--format-version")
        .arg("1")
        .arg("--no-deps")
        .arg("--manifest-path")
        .arg(repo.join("Cargo.toml"))
        .output()
        .await?;
    let stdout = str::from_utf8(&output.stdout)?
        .lines()
        .find(|line| line.starts_with('{'))
        .ok_or(cargo_metadata::Error::NoJson)?;
    let metadata: cargo_metadata::Metadata =
        serde_json::from_str(stdout).context("Failed to parse cargo metadata output")?;

    // Search all workspace packages for one that produces this binary
    for package_id in &metadata.workspace_members {
        let package = metadata
            .packages
            .iter()
            .find(|p| &p.id == package_id)
            .with_context(|| format!("Package not found in metadata for id: {package_id}"))?;

        if package_produces_binary(package, binary_name) {
            let package_dir = package
                .manifest_path
                .parent()
                .expect("manifest should have parent")
                .as_std_path()
                .to_path_buf();

            // It's a workspace if either:
            // - there are multiple members, OR
            // - the package is not at the workspace root
            let is_workspace = metadata.workspace_members.len() > 1
                || package_dir != metadata.workspace_root.as_std_path();

            return Ok(Some((package_dir, package.name.to_string(), is_workspace)));
        }
    }

    Ok(None)
}

/// Check if two names match, accounting for hyphen/underscore normalization.
fn names_match(name: &str, binary_name: &str) -> bool {
    name == binary_name || name.replace('-', "_") == binary_name.replace('-', "_")
}

/// Check if a package produces a binary with the given name.
fn package_produces_binary(package: &cargo_metadata::Package, binary_name: &str) -> bool {
    package
        .targets
        .iter()
        .filter(|t| t.is_bin())
        .any(|t| names_match(&t.name, binary_name))
}

/// Copy executable binaries from a release directory to a destination bin directory.
async fn copy_binaries(release_dir: &Path, dest_bin_dir: &Path) -> anyhow::Result<()> {
    let mut entries = fs_err::tokio::read_dir(release_dir).await?;
    while let Some(entry) = entries.next_entry().await? {
        let path = entry.path();
        if let Some(ext) = path.extension() {
            // Skip non-binary files like .d, .rlib, etc.
            if ext == "d" || ext == "rlib" || ext == "rmeta" {
                continue;
            }
        }

        // Copy executable files (not directories, not .d files, etc.)
        if is_executable(&path) {
            let dest = dest_bin_dir.join(entry.file_name());
            fs_err::tokio::copy(&path, &dest).await?;
        }
    }
    Ok(())
}

async fn install_local_project(
    hook_binary: &str,
    repo_path: &Path,
    info: &InstallInfo,
    lib_deps: &[&String],
    cargo: &Path,
    cargo_home: &Path,
    new_path: &OsStr,
) -> anyhow::Result<()> {
    // Find the specific package directory for this hook's binary
    let (package_dir, package_name, is_workspace) = match find_package_dir(
        repo_path,
        hook_binary,
        Some(cargo),
        Some(cargo_home),
        Some(new_path),
    )
    .await
    {
        Err(e) => {
            return Err(e.context("Failed to find package directory using cargo metadata"));
        }
        Ok(Some((package_dir, package_name, is_workspace))) => {
            debug!(
                "Found package `{package_name}` for binary `{hook_binary}` in repo `{}` at `{}`",
                repo_path.display(),
                package_dir.display(),
            );
            (package_dir, package_name, is_workspace)
        }
        Ok(None) => {
            debug!(
                "Binary `{hook_binary}` not found in cargo metadata for repo `{}`, falling back to repo root",
                repo_path.display(),
            );
            (repo_path.to_path_buf(), String::new(), false)
        }
    };

    if lib_deps.is_empty() {
        // For packages without lib deps, use `cargo install` directly
        Cmd::new(cargo)
            .args(["install", "--bins", "--root"])
            .arg(&info.env_path)
            .args(["--path", ".", "--locked"])
            .current_dir(&package_dir)
            .env(EnvVars::PATH, new_path)
            .env(EnvVars::CARGO_HOME, cargo_home)
            .isolate_from_git_env()
            .check(true)
            .output()
            .await?;
    } else {
        // For packages with lib deps, copy manifest, modify, build and copy binaries
        let manifest_dir = info.env_path.join("manifest");
        fs_err::tokio::create_dir_all(&manifest_dir).await?;

        // Copy Cargo.toml
        let src_manifest = package_dir.join("Cargo.toml");
        let dst_manifest = manifest_dir.join("Cargo.toml");
        fs_err::tokio::copy(&src_manifest, &dst_manifest).await?;

        // Copy Cargo.lock if it exists (check both package dir and repo root for workspaces)
        let lock_locations = if is_workspace {
            vec![repo_path.join("Cargo.lock"), package_dir.join("Cargo.lock")]
        } else {
            vec![package_dir.join("Cargo.lock")]
        };
        for lock_path in lock_locations {
            if lock_path.exists() {
                fs_err::tokio::copy(&lock_path, manifest_dir.join("Cargo.lock")).await?;
                break;
            }
        }

        // Copy src directory (cargo add needs it to exist for path validation)
        let src_dir = package_dir.join("src");
        if src_dir.exists() {
            let dst_src = manifest_dir.join("src");
            fs_err::tokio::create_dir_all(&dst_src).await?;
            let mut entries = fs_err::tokio::read_dir(&src_dir).await?;
            while let Some(entry) = entries.next_entry().await? {
                if entry.file_type().await?.is_file() {
                    fs_err::tokio::copy(entry.path(), dst_src.join(entry.file_name())).await?;
                }
            }
        }

        // Run cargo add on the copied manifest
        let mut cmd = Cmd::new(cargo);
        cmd.arg("add");
        for dep in lib_deps {
            cmd.arg(format_cargo_dependency(dep.as_str()));
        }
        cmd.current_dir(&manifest_dir)
            .env(EnvVars::PATH, new_path)
            .env(EnvVars::CARGO_HOME, cargo_home)
            .isolate_from_git_env()
            .check(true)
            .output()
            .await?;

        // Build using cargo build with --manifest-path pointing to modified manifest
        // but source files come from original package_dir
        let target_dir = info.env_path.join("target");
        let mut cmd = Cmd::new(cargo);
        cmd.args(["build", "--bins", "--release"])
            .arg("--manifest-path")
            .arg(&dst_manifest)
            .arg("--target-dir")
            .arg(&target_dir);

        // For workspace members, explicitly specify the package
        if is_workspace && !package_name.is_empty() {
            cmd.args(["--package", &package_name]);
        }

        cmd.current_dir(&package_dir)
            .env(EnvVars::PATH, new_path)
            .env(EnvVars::CARGO_HOME, cargo_home)
            .isolate_from_git_env()
            .check(true)
            .output()
            .await?;

        // Copy compiled binaries to the bin directory
        copy_binaries(&target_dir.join("release"), &bin_dir(&info.env_path)).await?;

        // Clean up manifest and target directories
        fs_err::tokio::remove_dir_all(&manifest_dir).await?;
        fs_err::tokio::remove_dir_all(&target_dir).await?;
    }

    Ok(())
}

async fn install_cli_dependency(
    cli_dep: &str,
    info: &InstallInfo,
    cargo: &Path,
    cargo_home: &Path,
    new_path: &OsStr,
) -> anyhow::Result<()> {
    let dep = CargoCliDependency::from_str(cli_dep)?;

    let mut cmd = Cmd::new(cargo);
    cmd.args(["install", "--bins", "--root"])
        .arg(&info.env_path)
        .args(dep.to_cargo_args())
        .arg("--locked");

    cmd.env(EnvVars::PATH, new_path)
        .env(EnvVars::CARGO_HOME, cargo_home)
        .isolate_from_git_env()
        .check(true)
        .output()
        .await?;

    Ok(())
}

#[derive(Debug, Copy, Clone)]
pub(crate) struct Rust;

#[async_trait::async_trait(?Send)]
impl LanguageBackend for Rust {
    async fn install(
        &self,
        store: &Store,
        hook: Arc<Hook>,
        reporter: &HookInstallReporter,
    ) -> anyhow::Result<InstalledHook> {
        let progress = reporter.on_install_start(&hook);

        // 1. Install Rust
        let cargo_home = store.cache_path(CacheBucket::Cargo);
        let rustup_dir = store.tools_path(ToolBucket::Rustup);
        let rustup = Rustup::install(store, &rustup_dir).await?;
        let installer = RustInstaller::new(rustup);

        let (version, allows_download) = match &hook.language_request {
            LanguageRequest::Any { system_only } => (&RustRequest::Any, !system_only),
            LanguageRequest::Rust(version) => (version, true),
            _ => unreachable!(),
        };

        let rust = installer
            .install(version, allows_download)
            .await
            .context("Failed to install rust")?;
        let rustc_bin = bin_dir(rust.toolchain());
        let cargo = rustc_bin.join("cargo").with_extension(EXE_EXTENSION);
        // Add toolchain bin to PATH, for cargo to use correct rustc
        let new_path = prepend_paths(&[&rustc_bin]).context("Failed to join PATH")?;

        let mut info = InstallInfo::new(&hook, &store.hooks_dir())?;
        info.with_toolchain(rust.toolchain().to_path_buf())
            .with_language_version(rust.version().deref().clone());

        // Store the channel name for cache matching
        match version {
            RustRequest::Channel(channel) => {
                info.with_extra(EXTRA_KEY_CHANNEL, &channel.to_string());
            }
            RustRequest::Any => {
                let channel = rust.version().channel().unwrap_or(Channel::Stable);
                info.with_extra(EXTRA_KEY_CHANNEL, &channel.to_string());
            }
            _ => {}
        }

        // 2. Create environment
        fs_err::tokio::create_dir_all(bin_dir(&info.env_path)).await?;

        // 3. Install dependencies
        // Split dependencies by cli: prefix
        let (cli_deps, lib_deps): (Vec<_>, Vec<_>) =
            hook.additional_dependencies.iter().partition_map(|dep| {
                if let Some(stripped) = dep.strip_prefix("cli:") {
                    Either::Left(stripped)
                } else {
                    Either::Right(dep)
                }
            });

        // Use the hook entry as the binary name to find the package, this could be improved by allowing an explicit binary name in the hook config.
        let hook_entry = hook.entry.expect_direct().split()?;
        let hook_bin = hook_entry[0]
            .to_str()
            .context("Rust hook entry binary must be valid UTF-8")?;

        // Install library dependencies and local project
        if let Some(repo) = hook.repo_path() {
            install_local_project(
                hook_bin,
                repo,
                &info,
                &lib_deps,
                &cargo,
                &cargo_home,
                &new_path,
            )
            .await?;
        }

        // Install CLI dependencies
        for cli_dep in cli_deps {
            install_cli_dependency(cli_dep, &info, &cargo, &cargo_home, &new_path).await?;
        }

        info.persist_env_path();

        reporter.on_install_complete(progress);

        Ok(InstalledHook::Installed {
            hook,
            info: Arc::new(info),
        })
    }

    async fn check_health(&self, _info: &InstallInfo) -> anyhow::Result<()> {
        Ok(())
    }

    async fn run(
        &self,
        store: &Store,
        hook: &InstalledHook,
        filenames: &[&Path],
        reporter: &HookRunReporter,
    ) -> anyhow::Result<(i32, Vec<u8>)> {
        let progress = reporter.on_run_start(hook, filenames.len());

        let env_dir = hook.env_path().expect("Rust hook must have env path");
        let info = hook.install_info().expect("Rust hook must be installed");

        let rust_bin = bin_dir(env_dir);
        let cargo_home = store.cache_path(CacheBucket::Cargo);
        let rustc_bin = bin_dir(&info.toolchain);

        let new_path = prepend_paths(&[&rust_bin, &rustc_bin]).context("Failed to join PATH")?;

        let entry = hook.entry.resolve(Some(&new_path), store)?;
        let run = async |batch: &[&Path]| {
            let mut output = Cmd::new(&entry[0])
                .current_dir(hook.work_dir())
                .args(&entry[1..])
                .env(EnvVars::PATH, &new_path)
                .env(EnvVars::CARGO_HOME, &cargo_home)
                .env(EnvVars::RUSTUP_AUTO_INSTALL, "0")
                .envs(&hook.env)
                .args(&hook.args)
                .file_args(batch)
                .check(false)
                .stdin(Stdio::null())
                .pty_output_with_sink(reporter.output_sink(progress))
                .await?;

            reporter.on_run_progress(progress, batch.len() as u64);

            output.stdout.extend(output.stderr);
            let code = output.status.code().unwrap_or(1);
            anyhow::Ok((code, output.stdout))
        };

        let results = run_by_batch(hook, filenames, entry.argv(), run).await?;

        let mut combined_status = 0;
        let mut combined_output = Vec::new();

        for (code, output) in results {
            combined_status |= code;
            combined_output.extend(output);
        }

        reporter.on_run_complete(progress);

        Ok((combined_status, combined_output))
    }
}

pub(crate) fn bin_dir(env_path: &Path) -> PathBuf {
    env_path.join("bin")
}

#[cfg(test)]
mod tests {
    use super::*;
    use tempfile::TempDir;

    async fn write_file(path: &Path, content: &str) {
        if let Some(parent) = path.parent() {
            fs_err::tokio::create_dir_all(parent).await.unwrap();
        }
        fs_err::tokio::write(path, content).await.unwrap();
    }

    #[tokio::test]
    async fn test_find_package_dir_single_package() {
        let temp = TempDir::new().unwrap();
        let cargo_toml = r#"
[package]
name = "my-tool"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;
        write_file(&temp.path().join("src/main.rs"), "fn main() {}").await;

        let (path, pkg_name, is_workspace) =
            find_package_dir(temp.path(), "my-tool", None, None, None)
                .await
                .unwrap()
                .unwrap();
        assert_eq!(path, temp.path());
        assert_eq!(pkg_name, "my-tool");
        assert!(!is_workspace);
    }

    #[tokio::test]
    async fn test_find_package_dir_single_package_underscore_normalization() {
        let temp = TempDir::new().unwrap();
        let cargo_toml = r#"
[package]
name = "my-tool"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;
        write_file(&temp.path().join("src/main.rs"), "fn main() {}").await;

        // Should match with underscores instead of hyphens
        let (path, _pkg, is_workspace) = find_package_dir(temp.path(), "my_tool", None, None, None)
            .await
            .unwrap()
            .unwrap();
        assert_eq!(path, temp.path());
        assert!(!is_workspace);
    }

    #[tokio::test]
    async fn test_find_package_dir_workspace_with_root_package() {
        let temp = TempDir::new().unwrap();
        let cargo_toml = r#"
[package]
name = "cargo-deny"
version = "0.18.5"
edition = "2021"

[workspace]
members = ["subcrate"]
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;
        write_file(&temp.path().join("src/main.rs"), "fn main() {}").await;

        // Create subcrate with a lib.rs
        let subcrate_toml = r#"
[package]
name = "subcrate"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("subcrate/Cargo.toml"), subcrate_toml).await;
        write_file(&temp.path().join("subcrate/src/lib.rs"), "").await;

        let (path, pkg_name, is_workspace) =
            find_package_dir(temp.path(), "cargo-deny", None, None, None)
                .await
                .unwrap()
                .unwrap();
        assert_eq!(path, temp.path());
        assert_eq!(pkg_name, "cargo-deny");
        assert!(is_workspace);
    }

    #[tokio::test]
    async fn test_find_package_dir_workspace_member() {
        let temp = TempDir::new().unwrap();
        let cargo_toml = r#"
[workspace]
members = ["cli", "lib"]
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;

        let cli_toml = r#"
[package]
name = "my-cli"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("cli/Cargo.toml"), cli_toml).await;
        write_file(&temp.path().join("cli/src/main.rs"), "fn main() {}").await;

        let lib_toml = r#"
[package]
name = "my-lib"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("lib/Cargo.toml"), lib_toml).await;
        write_file(&temp.path().join("lib/src/lib.rs"), "").await;

        let (path, pkg_name, is_workspace) =
            find_package_dir(temp.path(), "my-cli", None, None, None)
                .await
                .unwrap()
                .unwrap();
        assert_eq!(path, temp.path().join("cli"));
        assert_eq!(pkg_name, "my-cli");
        assert!(is_workspace);
    }

    #[tokio::test]
    async fn test_find_package_dir_by_bin_name() {
        let temp = TempDir::new().unwrap();

        let cargo_toml = r#"
[workspace]
members = ["crates/typos-cli"]
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;

        // Package is typos-cli but binary is typos
        let cli_toml = r#"
[package]
name = "typos-cli"
version = "0.1.0"
edition = "2021"

[[bin]]
name = "typos"
path = "src/main.rs"
"#;
        write_file(&temp.path().join("crates/typos-cli/Cargo.toml"), cli_toml).await;
        write_file(
            &temp.path().join("crates/typos-cli/src/main.rs"),
            "fn main() {}",
        )
        .await;

        // Should find by binary name, return package name
        let (path, pkg_name, is_workspace) =
            find_package_dir(temp.path(), "typos", None, None, None)
                .await
                .unwrap()
                .unwrap();
        assert_eq!(path, temp.path().join("crates/typos-cli"));
        assert_eq!(pkg_name, "typos-cli");
        assert!(is_workspace);
    }

    #[tokio::test]
    async fn test_find_package_dir_by_src_bin_file() {
        let temp = TempDir::new().unwrap();

        let cargo_toml = r#"
[package]
name = "my-pkg"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;
        write_file(&temp.path().join("src/bin/my-tool.rs"), "fn main() {}").await;
        // Need a lib.rs or main.rs for the package itself
        write_file(&temp.path().join("src/lib.rs"), "").await;

        let (path, _pkg, is_workspace) = find_package_dir(temp.path(), "my-tool", None, None, None)
            .await
            .unwrap()
            .unwrap();
        assert_eq!(path, temp.path());
        assert!(!is_workspace);
    }

    #[tokio::test]
    async fn test_find_package_dir_virtual_workspace_nested_member() {
        let temp = TempDir::new().unwrap();

        let cargo_toml = r#"
[workspace]
members = ["crates/cli"]
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;

        let cli_toml = r#"
[package]
name = "virtual-cli"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("crates/cli/Cargo.toml"), cli_toml).await;
        write_file(&temp.path().join("crates/cli/src/main.rs"), "fn main() {}").await;

        let (path, pkg_name, is_workspace) =
            find_package_dir(temp.path(), "virtual-cli", None, None, None)
                .await
                .unwrap()
                .unwrap();
        assert_eq!(path, temp.path().join("crates/cli"));
        assert_eq!(pkg_name, "virtual-cli");
        assert!(is_workspace);
    }

    #[tokio::test]
    async fn test_find_package_dir_virtual_workspace_glob_members() {
        let temp = TempDir::new().unwrap();

        let cargo_toml = r#"
[workspace]
members = ["crates/*"]
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;

        let cli_toml = r#"
[package]
name = "my-cli"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("crates/cli/Cargo.toml"), cli_toml).await;
        write_file(&temp.path().join("crates/cli/src/main.rs"), "fn main() {}").await;

        let lib_toml = r#"
[package]
name = "my-lib"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("crates/lib/Cargo.toml"), lib_toml).await;
        write_file(&temp.path().join("crates/lib/src/lib.rs"), "").await;

        let (path, pkg_name, is_workspace) =
            find_package_dir(temp.path(), "my-cli", None, None, None)
                .await
                .unwrap()
                .unwrap();
        assert_eq!(path, temp.path().join("crates/cli"));
        assert_eq!(pkg_name, "my-cli");
        assert!(is_workspace);

        // my-lib is a library (no binary), so searching for it should fail
        let result = find_package_dir(temp.path(), "my-lib", None, None, None)
            .await
            .unwrap();
        assert!(result.is_none());
    }

    #[tokio::test]
    async fn test_find_package_dir_no_cargo_toml() {
        let temp = TempDir::new().unwrap();

        let result = find_package_dir(temp.path(), "anything", None, None, None).await;
        assert!(result.is_err());
        // cargo metadata gives a different error message
        assert!(result.unwrap_err().to_string().contains("cargo metadata"));
    }

    #[tokio::test]
    async fn test_find_package_dir_workspace_binary_not_found() {
        let temp = TempDir::new().unwrap();
        let cargo_toml = r#"
[workspace]
members = ["cli"]
"#;
        write_file(&temp.path().join("Cargo.toml"), cargo_toml).await;

        let cli_toml = r#"
[package]
name = "some-other-tool"
version = "0.1.0"
edition = "2021"
"#;
        write_file(&temp.path().join("cli/Cargo.toml"), cli_toml).await;
        write_file(&temp.path().join("cli/src/main.rs"), "fn main() {}").await;

        let result = find_package_dir(temp.path(), "nonexistent-binary", None, None, None)
            .await
            .unwrap();
        assert!(result.is_none());
    }

    #[test]
    fn test_format_cargo_dependency() {
        assert_eq!(format_cargo_dependency("serde"), "serde@*");
        assert_eq!(format_cargo_dependency("serde:1.0"), "serde@1.0");
        assert_eq!(format_cargo_dependency("tokio:1.0.0"), "tokio@1.0.0");
    }

    #[test]
    fn test_parse_cargo_cli_dependency_crate_forms() {
        assert_eq!(
            CargoCliDependency::from_str("typos-cli").unwrap(),
            CargoCliDependency::Crate {
                name: "typos-cli".to_string(),
                version: None,
            }
        );
        assert_eq!(
            CargoCliDependency::from_str("typos-cli:1.0").unwrap(),
            CargoCliDependency::Crate {
                name: "typos-cli".to_string(),
                version: Some("1.0".to_string())
            }
        );
    }

    #[test]
    fn test_parse_cargo_cli_dependency_git_valid_forms() {
        let cases = [
            (
                "https://github.com/fish-shell/fish-shell",
                CargoCliDependency::Git {
                    url: "https://github.com/fish-shell/fish-shell".to_string(),
                    tag: None,
                    package: None,
                },
            ),
            (
                "https://github.com/fish-shell/fish-shell:v4.5.0",
                CargoCliDependency::Git {
                    url: "https://github.com/fish-shell/fish-shell".to_string(),
                    tag: Some("v4.5.0".to_string()),
                    package: None,
                },
            ),
            (
                "https://github.com/fish-shell/fish-shell::fish",
                CargoCliDependency::Git {
                    url: "https://github.com/fish-shell/fish-shell".to_string(),
                    tag: None,
                    package: Some("fish".to_string()),
                },
            ),
            (
                "https://github.com/fish-shell/fish-shell:v4.5.0:fish",
                CargoCliDependency::Git {
                    url: "https://github.com/fish-shell/fish-shell".to_string(),
                    tag: Some("v4.5.0".to_string()),
                    package: Some("fish".to_string()),
                },
            ),
        ];

        for (input, expected) in cases {
            assert_eq!(CargoCliDependency::from_str(input).unwrap(), expected);
        }
    }

    #[test]
    fn test_parse_cargo_cli_dependency_git_invalid_forms() {
        let invalid_cases = [
            "https://github.com/fish-shell/fish-shell:",
            "https://github.com/fish-shell/fish-shell:v4.5.0:",
            "https://github.com/fish-shell/fish-shell::",
        ];

        for input in invalid_cases {
            assert!(
                CargoCliDependency::from_str(input).is_err(),
                "input: {input}"
            );
        }
    }

    #[test]
    fn test_format_cargo_cli_dependency() {
        let cases = [
            ("typos-cli", vec!["typos-cli"]),
            ("typos-cli:1.0", vec!["typos-cli", "--version", "1.0"]),
            (
                "https://github.com/fish-shell/fish-shell",
                vec!["--git", "https://github.com/fish-shell/fish-shell"],
            ),
            (
                "https://github.com/fish-shell/fish-shell:v4.5.0",
                vec![
                    "--git",
                    "https://github.com/fish-shell/fish-shell",
                    "--tag",
                    "v4.5.0",
                ],
            ),
            (
                "https://github.com/fish-shell/fish-shell::fish",
                vec!["--git", "https://github.com/fish-shell/fish-shell", "fish"],
            ),
            (
                "https://github.com/fish-shell/fish-shell:v4.5.0:fish",
                vec![
                    "--git",
                    "https://github.com/fish-shell/fish-shell",
                    "--tag",
                    "v4.5.0",
                    "fish",
                ],
            ),
        ];

        for (input, expected) in cases {
            let dep = CargoCliDependency::from_str(input).unwrap();
            assert_eq!(dep.to_cargo_args(), expected, "input: {input}");
        }
    }
}
