xbp_build/

lib.rs

#![forbid(unsafe_code)]

use serde::{Deserialize, Serialize};
use serde_json::Value;
use std::collections::HashMap;
use std::fs;
use std::path::Path;
pub use xbp_core::ProjectRuntime;

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum ProjectType {
    Docker {
        has_dockerfile: bool,
        detected_ports: Vec<u16>,
    },
    DockerCompose {
        compose_files: Vec<String>,
        detected_ports: Vec<u16>,
    },
    Railway {
        has_railway_json: bool,
        has_railway_toml: bool,
    },
    Vercel {
        has_vercel_json: bool,
        has_project_link: bool,
    },
    Python {
        has_requirements_txt: bool,
        has_pyproject_toml: bool,
    },
    OpenApi {
        spec_files: Vec<String>,
    },
    Terraform {
        tf_file_count: usize,
    },
    NextJs {
        package_json: PackageJsonInfo,
        has_next_config: bool,
    },
    NodeJs {
        package_json: PackageJsonInfo,
    },
    Rust {
        cargo_toml: CargoTomlInfo,
    },
    Unknown,
}

impl ProjectType {
    pub const fn kind_slug(&self) -> &'static str {
        match self {
            Self::Docker { .. } => "docker",
            Self::DockerCompose { .. } => "docker-compose",
            Self::Railway { .. } => "railway",
            Self::Vercel { .. } => "vercel",
            Self::Python { .. } => "python",
            Self::OpenApi { .. } => "openapi",
            Self::Terraform { .. } => "terraform",
            Self::NextJs { .. } => "nextjs",
            Self::NodeJs { .. } => "nodejs",
            Self::Rust { .. } => "rust",
            Self::Unknown => "unknown",
        }
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
#[serde(rename_all = "snake_case")]
pub enum ProjectHint {
    Docker,
    DockerCompose,
    Python,
    NodeJs,
    Rust,
    Railway,
    Vercel,
    Go,
}

impl ProjectHint {
    pub const fn as_str(self) -> &'static str {
        match self {
            Self::Docker => "docker",
            Self::DockerCompose => "docker_compose",
            Self::Python => "python",
            Self::NodeJs => "nodejs",
            Self::Rust => "rust",
            Self::Railway => "railway",
            Self::Vercel => "vercel",
            Self::Go => "go",
        }
    }
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct PackageJsonInfo {
    pub name: String,
    pub version: String,
    pub scripts: HashMap<String, String>,
    pub dependencies: HashMap<String, String>,
    pub dev_dependencies: HashMap<String, String>,
    pub main: Option<String>,
}

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct CargoTomlInfo {
    pub name: String,
    pub version: String,
    pub description: Option<String>,
    pub authors: Vec<String>,
    pub edition: Option<String>,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub struct DeploymentRecommendations {
    pub build_command: Option<String>,
    pub start_command: Option<String>,
    pub install_command: Option<String>,
    pub dev_command: Option<String>,
    pub default_port: u16,
    pub process_name: Option<String>,
    pub requires_build: bool,
}

pub struct ProjectDetector;

impl ProjectDetector {
    pub async fn detect_project_type(project_path: &Path) -> Result<ProjectType, String> {
        let project_path = project_path
            .canonicalize()
            .map_err(|e| format!("Failed to resolve project path: {}", e))?;

        if let Ok(project_type) = Self::detect_docker_compose(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_docker(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_railway(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_vercel(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_python(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_nextjs(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_nodejs(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_rust(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_openapi(&project_path).await {
            return Ok(project_type);
        }
        if let Ok(project_type) = Self::detect_terraform(&project_path).await {
            return Ok(project_type);
        }

        Ok(ProjectType::Unknown)
    }

    pub fn detect_project_hints(project_path: &Path) -> Result<Vec<ProjectHint>, String> {
        let project_path = project_path
            .canonicalize()
            .map_err(|e| format!("Failed to resolve project path: {}", e))?;
        let mut hints = Vec::new();

        if project_path.join("Dockerfile").exists() {
            push_hint(&mut hints, ProjectHint::Docker);
        }

        if project_path.join("docker-compose.yml").exists()
            || project_path.join("docker-compose.yaml").exists()
            || project_path.join("compose.yml").exists()
            || project_path.join("compose.yaml").exists()
        {
            push_hint(&mut hints, ProjectHint::DockerCompose);
        }

        if project_path.join("requirements.txt").exists()
            || project_path.join("pyproject.toml").exists()
            || project_path.join("setup.py").exists()
        {
            push_hint(&mut hints, ProjectHint::Python);
        }

        if project_path.join("package.json").exists() {
            push_hint(&mut hints, ProjectHint::NodeJs);
        }

        if project_path.join("Cargo.toml").exists() {
            push_hint(&mut hints, ProjectHint::Rust);
        }

        if project_path.join("railway.json").exists() || project_path.join("railway.toml").exists()
        {
            push_hint(&mut hints, ProjectHint::Railway);
        }

        if project_path.join("vercel.json").exists()
            || project_path.join(".vercel").join("project.json").exists()
        {
            push_hint(&mut hints, ProjectHint::Vercel);
        }

        if project_path.join("go.mod").exists() {
            push_hint(&mut hints, ProjectHint::Go);
        }

        Ok(hints)
    }

    pub fn detect_provider_manifests(project_path: &Path) -> Vec<String> {
        let mut detections = Vec::new();

        if project_path.join("Dockerfile").exists() {
            detections.push("Dockerfile".to_string());
        }

        for name in [
            "docker-compose.yml",
            "docker-compose.yaml",
            "compose.yml",
            "compose.yaml",
        ] {
            if project_path.join(name).exists() {
                detections.push(name.to_string());
            }
        }

        if project_path.join("railway.json").exists() {
            detections.push("railway.json".to_string());
        }
        if project_path.join("railway.toml").exists() {
            detections.push("railway.toml".to_string());
        }
        if project_path.join("vercel.json").exists() {
            detections.push("vercel.json".to_string());
        }
        if project_path.join(".vercel").join("project.json").exists() {
            detections.push(".vercel/project.json".to_string());
        }
        if project_path.join("requirements.txt").exists() {
            detections.push("requirements.txt".to_string());
        }
        if project_path.join("pyproject.toml").exists() {
            detections.push("pyproject.toml".to_string());
        }
        if project_path.join("setup.py").exists() {
            detections.push("setup.py".to_string());
        }
        if project_path.join("go.mod").exists() {
            detections.push("go.mod".to_string());
        }

        for name in [
            "openapi.yaml",
            "openapi.yml",
            "swagger.yaml",
            "swagger.yml",
            "swagger.json",
        ] {
            if project_path.join(name).exists() {
                detections.push(name.to_string());
            }
        }

        let tf_count = match fs::read_dir(project_path) {
            Ok(entries) => entries
                .filter_map(|entry| entry.ok())
                .filter(|entry| {
                    entry
                        .path()
                        .extension()
                        .and_then(|s| s.to_str())
                        .map(|ext| ext.eq_ignore_ascii_case("tf"))
                        .unwrap_or(false)
                })
                .count(),
            Err(_) => 0,
        };
        if tf_count > 0 {
            detections.push(format!("Terraform (.tf) x{}", tf_count));
        }

        detections
    }

    pub fn get_deployment_recommendations(
        project_path: &Path,
        project_type: &ProjectType,
    ) -> DeploymentRecommendations {
        match project_type {
            ProjectType::DockerCompose { detected_ports, .. } => DeploymentRecommendations {
                build_command: Some("docker compose build".to_string()),
                start_command: Some("docker compose up -d".to_string()),
                install_command: None,
                dev_command: None,
                default_port: detected_ports.first().copied().unwrap_or(80),
                process_name: None,
                requires_build: true,
            },
            ProjectType::Docker { detected_ports, .. } => {
                let default_port = detected_ports.first().copied().unwrap_or(80);
                let image_tag = local_docker_image_tag(project_path, project_type);
                let container_name = local_docker_container_name(project_path, project_type);

                DeploymentRecommendations {
                    build_command: Some(format!("docker build -t {image_tag} .")),
                    start_command: Some(format!(
                        "docker run -d --rm --name {container_name} -p {default_port}:{default_port} -e PORT {image_tag}"
                    )),
                    install_command: None,
                    dev_command: None,
                    default_port,
                    process_name: None,
                    requires_build: true,
                }
            }
            ProjectType::Railway { .. } => DeploymentRecommendations {
                build_command: None,
                start_command: None,
                install_command: None,
                dev_command: None,
                default_port: 8080,
                process_name: None,
                requires_build: false,
            },
            ProjectType::Vercel { .. } => DeploymentRecommendations {
                build_command: None,
                start_command: None,
                install_command: None,
                dev_command: None,
                default_port: 3000,
                process_name: None,
                requires_build: false,
            },
            ProjectType::Python {
                has_requirements_txt,
                has_pyproject_toml,
            } => {
                let pip = preferred_pip_command();
                let install_command = if *has_requirements_txt {
                    Some(format!("{pip} install -r requirements.txt"))
                } else if *has_pyproject_toml {
                    Some(format!("{pip} install -e ."))
                } else {
                    None
                };

                DeploymentRecommendations {
                    build_command: None,
                    start_command: None,
                    install_command,
                    dev_command: None,
                    default_port: 8000,
                    process_name: None,
                    requires_build: false,
                }
            }
            ProjectType::OpenApi { .. } => DeploymentRecommendations {
                build_command: None,
                start_command: None,
                install_command: None,
                dev_command: None,
                default_port: 8080,
                process_name: None,
                requires_build: false,
            },
            ProjectType::Terraform { .. } => DeploymentRecommendations {
                build_command: None,
                start_command: None,
                install_command: None,
                dev_command: None,
                default_port: 8080,
                process_name: None,
                requires_build: false,
            },
            ProjectType::NextJs { package_json, .. } => {
                node_package_recommendations(project_path, package_json, true)
            }
            ProjectType::NodeJs { package_json } => {
                node_package_recommendations(project_path, package_json, false)
            }
            ProjectType::Rust { cargo_toml } => DeploymentRecommendations {
                build_command: Some("cargo build --release".to_string()),
                start_command: Some(format!("./target/release/{}", cargo_toml.name)),
                install_command: None,
                dev_command: None,
                default_port: 8080,
                process_name: Some(cargo_toml.name.clone()),
                requires_build: true,
            },
            ProjectType::Unknown => DeploymentRecommendations {
                build_command: None,
                start_command: None,
                install_command: None,
                dev_command: None,
                default_port: 8080,
                process_name: None,
                requires_build: false,
            },
        }
    }

    async fn detect_docker_compose(project_path: &Path) -> Result<ProjectType, String> {
        let compose_names = [
            "docker-compose.yml",
            "docker-compose.yaml",
            "compose.yml",
            "compose.yaml",
        ];

        let mut compose_files = Vec::new();
        for name in compose_names {
            if project_path.join(name).exists() {
                compose_files.push(name.to_string());
            }
        }

        if compose_files.is_empty() {
            return Err("No compose file found".to_string());
        }

        let mut detected_ports = Vec::new();
        for file in &compose_files {
            let path = project_path.join(file);
            if let Ok(contents) = fs::read_to_string(&path) {
                if let Ok(value) = serde_yaml::from_str::<serde_yaml::Value>(&contents) {
                    if let Some(services) = value.get("services").and_then(|v| v.as_mapping()) {
                        for (_service_name, service_cfg) in services {
                            let ports = service_cfg
                                .get("ports")
                                .and_then(|v| v.as_sequence())
                                .cloned()
                                .unwrap_or_default();

                            for port_value in ports {
                                if let Some(port_text) = port_value.as_str() {
                                    if let Some(host) = port_text.split(':').next() {
                                        if let Ok(port) = host.parse::<u16>() {
                                            detected_ports.push(port);
                                        }
                                    }
                                } else if let Some(port_number) = port_value.as_i64() {
                                    if port_number >= 1 && port_number <= u16::MAX as i64 {
                                        detected_ports.push(port_number as u16);
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

        detected_ports.sort_unstable();
        detected_ports.dedup();

        Ok(ProjectType::DockerCompose {
            compose_files,
            detected_ports,
        })
    }

    async fn detect_docker(project_path: &Path) -> Result<ProjectType, String> {
        let dockerfile_path = project_path.join("Dockerfile");
        if !dockerfile_path.exists() {
            return Err("No Dockerfile found".to_string());
        }
        let detected_ports = detect_dockerfile_ports(&dockerfile_path);
        Ok(ProjectType::Docker {
            has_dockerfile: true,
            detected_ports,
        })
    }

    async fn detect_railway(project_path: &Path) -> Result<ProjectType, String> {
        let has_railway_json = project_path.join("railway.json").exists();
        let has_railway_toml = project_path.join("railway.toml").exists();
        if !has_railway_json && !has_railway_toml {
            return Err("No railway manifest found".to_string());
        }

        Ok(ProjectType::Railway {
            has_railway_json,
            has_railway_toml,
        })
    }

    async fn detect_vercel(project_path: &Path) -> Result<ProjectType, String> {
        let has_vercel_json = project_path.join("vercel.json").exists();
        let has_project_link = project_path.join(".vercel").join("project.json").exists();
        if !has_vercel_json && !has_project_link {
            return Err("No vercel manifest found".to_string());
        }

        Ok(ProjectType::Vercel {
            has_vercel_json,
            has_project_link,
        })
    }

    async fn detect_python(project_path: &Path) -> Result<ProjectType, String> {
        let has_requirements_txt = project_path.join("requirements.txt").exists();
        let has_pyproject_toml = project_path.join("pyproject.toml").exists();
        if !has_requirements_txt && !has_pyproject_toml {
            return Err("No python manifest found".to_string());
        }

        Ok(ProjectType::Python {
            has_requirements_txt,
            has_pyproject_toml,
        })
    }

    async fn detect_openapi(project_path: &Path) -> Result<ProjectType, String> {
        let names = [
            "openapi.yaml",
            "openapi.yml",
            "swagger.yaml",
            "swagger.yml",
            "swagger.json",
        ];
        let mut spec_files = Vec::new();
        for name in names {
            if project_path.join(name).exists() {
                spec_files.push(name.to_string());
            }
        }

        if spec_files.is_empty() {
            return Err("No OpenAPI spec found".to_string());
        }
        Ok(ProjectType::OpenApi { spec_files })
    }

    async fn detect_terraform(project_path: &Path) -> Result<ProjectType, String> {
        let tf_file_count = fs::read_dir(project_path)
            .map_err(|_| "Failed to read directory".to_string())?
            .filter_map(|entry| entry.ok())
            .filter(|entry| {
                entry
                    .path()
                    .extension()
                    .and_then(|s| s.to_str())
                    .map(|ext| ext.eq_ignore_ascii_case("tf"))
                    .unwrap_or(false)
            })
            .count();

        if tf_file_count == 0 {
            return Err("No terraform files found".to_string());
        }
        Ok(ProjectType::Terraform { tf_file_count })
    }

    async fn detect_nextjs(project_path: &Path) -> Result<ProjectType, String> {
        let package_json_path = project_path.join("package.json");
        let next_config_path = project_path.join("next.config.js");
        let next_config_mjs_path = project_path.join("next.config.mjs");
        let next_dir = project_path.join(".next");

        if !package_json_path.exists() {
            return Err("No package.json found".to_string());
        }

        let package_json = Self::parse_package_json(&package_json_path)?;
        let has_next = package_json.dependencies.contains_key("next")
            || package_json.dev_dependencies.contains_key("next");
        if !has_next {
            return Err("Next.js not found in dependencies".to_string());
        }

        let has_next_config =
            next_config_path.exists() || next_config_mjs_path.exists() || next_dir.exists();

        Ok(ProjectType::NextJs {
            package_json,
            has_next_config,
        })
    }

    async fn detect_nodejs(project_path: &Path) -> Result<ProjectType, String> {
        let package_json_path = project_path.join("package.json");
        if !package_json_path.exists() {
            return Err("No package.json found".to_string());
        }

        Ok(ProjectType::NodeJs {
            package_json: Self::parse_package_json(&package_json_path)?,
        })
    }

    async fn detect_rust(project_path: &Path) -> Result<ProjectType, String> {
        let cargo_toml_path = project_path.join("Cargo.toml");
        if !cargo_toml_path.exists() {
            return Err("No Cargo.toml found".to_string());
        }

        Ok(ProjectType::Rust {
            cargo_toml: Self::parse_cargo_toml(&cargo_toml_path)?,
        })
    }

    fn parse_package_json(path: &Path) -> Result<PackageJsonInfo, String> {
        let content =
            fs::read_to_string(path).map_err(|e| format!("Failed to read package.json: {e}"))?;
        let json: Value = serde_json::from_str(&content)
            .map_err(|e| format!("Failed to parse package.json: {e}"))?;

        Ok(PackageJsonInfo {
            name: json["name"].as_str().unwrap_or("unknown").to_string(),
            version: json["version"].as_str().unwrap_or("0.0.0").to_string(),
            scripts: json["scripts"]
                .as_object()
                .map(|obj| {
                    obj.iter()
                        .filter_map(|(key, value)| {
                            value.as_str().map(|text| (key.clone(), text.to_string()))
                        })
                        .collect()
                })
                .unwrap_or_default(),
            dependencies: json["dependencies"]
                .as_object()
                .map(|obj| {
                    obj.iter()
                        .filter_map(|(key, value)| {
                            value.as_str().map(|text| (key.clone(), text.to_string()))
                        })
                        .collect()
                })
                .unwrap_or_default(),
            dev_dependencies: json["devDependencies"]
                .as_object()
                .map(|obj| {
                    obj.iter()
                        .filter_map(|(key, value)| {
                            value.as_str().map(|text| (key.clone(), text.to_string()))
                        })
                        .collect()
                })
                .unwrap_or_default(),
            main: json["main"].as_str().map(|value| value.to_string()),
        })
    }

    fn parse_cargo_toml(path: &Path) -> Result<CargoTomlInfo, String> {
        let content =
            fs::read_to_string(path).map_err(|e| format!("Failed to read Cargo.toml: {e}"))?;
        let toml_value: toml::Value =
            toml::from_str(&content).map_err(|e| format!("Failed to parse Cargo.toml: {e}"))?;
        let package = toml_value
            .get("package")
            .ok_or("No [package] section found in Cargo.toml")?;

        Ok(CargoTomlInfo {
            name: package
                .get("name")
                .and_then(|value| value.as_str())
                .ok_or("No name found in [package] section")?
                .to_string(),
            version: package
                .get("version")
                .and_then(|value| value.as_str())
                .unwrap_or("0.0.0")
                .to_string(),
            description: package
                .get("description")
                .and_then(|value| value.as_str())
                .map(|value| value.to_string()),
            authors: package
                .get("authors")
                .and_then(|value| value.as_array())
                .map(|values| {
                    values
                        .iter()
                        .filter_map(|value| value.as_str())
                        .map(|value| value.to_string())
                        .collect()
                })
                .unwrap_or_default(),
            edition: package
                .get("edition")
                .and_then(|value| value.as_str())
                .map(|value| value.to_string()),
        })
    }
}

fn push_hint(hints: &mut Vec<ProjectHint>, hint: ProjectHint) {
    if !hints.contains(&hint) {
        hints.push(hint);
    }
}

pub fn infer_project_name(
    project_root: &Path,
    project_type: &ProjectType,
    recommendations: &DeploymentRecommendations,
) -> String {
    if let Some(name) = recommendations.process_name.clone() {
        return name;
    }

    match project_type {
        ProjectType::Rust { cargo_toml } => cargo_toml.name.clone(),
        ProjectType::NextJs { package_json, .. } | ProjectType::NodeJs { package_json } => {
            package_json.name.clone()
        }
        _ => project_root
            .file_name()
            .and_then(|value| value.to_str())
            .unwrap_or("app")
            .to_string(),
    }
}

pub fn infer_target(project_type: &ProjectType) -> Option<String> {
    Some(
        match project_type {
            ProjectType::NextJs { .. } => "nextjs",
            ProjectType::NodeJs { .. } => "expressjs",
            ProjectType::Rust { .. } => "rust",
            ProjectType::Python { .. } => "python",
            ProjectType::DockerCompose { .. } => "docker-compose",
            ProjectType::Docker { .. } => "docker",
            ProjectType::Railway { .. } => "railway",
            ProjectType::Vercel { .. } => "vercel",
            ProjectType::OpenApi { .. } => "openapi",
            ProjectType::Terraform { .. } => "terraform",
            ProjectType::Unknown => "unknown",
        }
        .to_string(),
    )
}

fn detect_dockerfile_ports(dockerfile_path: &Path) -> Vec<u16> {
    let Ok(contents) = fs::read_to_string(dockerfile_path) else {
        return Vec::new();
    };

    let mut detected_ports = Vec::new();
    for line in contents.lines() {
        let line = line.split('#').next().unwrap_or_default().trim();
        if line.len() < 6 || !line[..6].eq_ignore_ascii_case("expose") {
            continue;
        }

        let Some(rest) = line.get(6..) else {
            continue;
        };

        for token in rest.split_whitespace() {
            let port_token = token.split('/').next().unwrap_or_default().trim();
            if let Ok(port) = port_token.parse::<u16>() {
                detected_ports.push(port);
            }
        }
    }

    detected_ports.sort_unstable();
    detected_ports.dedup();
    detected_ports
}

/// Prefer lockfile-detected package managers so discovered install/run commands match the repo.
fn detect_node_package_manager(project_path: &Path) -> &'static str {
    if project_path.join("pnpm-lock.yaml").is_file() {
        "pnpm"
    } else if project_path.join("yarn.lock").is_file() {
        "yarn"
    } else if project_path.join("bun.lockb").is_file() || project_path.join("bun.lock").is_file() {
        "bun"
    } else if project_path.join("package-lock.json").is_file() {
        "npm"
    } else {
        // Default for monorepos without a local lockfile.
        "pnpm"
    }
}

fn node_install_command(package_manager: &str) -> String {
    match package_manager {
        "yarn" => "yarn install".to_string(),
        "bun" => "bun install".to_string(),
        "npm" => "npm install".to_string(),
        _ => "pnpm install".to_string(),
    }
}

fn node_script_command(package_manager: &str, script: &str) -> String {
    match package_manager {
        "yarn" => format!("yarn {script}"),
        "bun" => format!("bun run {script}"),
        "npm" => format!("npm run {script}"),
        _ => format!("pnpm run {script}"),
    }
}

fn node_package_recommendations(
    project_path: &Path,
    package_json: &PackageJsonInfo,
    is_nextjs: bool,
) -> DeploymentRecommendations {
    let package_manager = detect_node_package_manager(project_path);
    let has_build = package_json.scripts.contains_key("build");
    let has_start = package_json.scripts.contains_key("start");
    let has_dev = package_json.scripts.contains_key("dev");

    let build_command = if has_build {
        Some(node_script_command(package_manager, "build"))
    } else if is_nextjs {
        // Next.js projects almost always build via the framework script.
        Some(node_script_command(package_manager, "build"))
    } else {
        None
    };

    let start_command = if has_start {
        Some(node_script_command(package_manager, "start"))
    } else if is_nextjs {
        Some(node_script_command(package_manager, "start"))
    } else {
        package_json
            .main
            .as_ref()
            .map(|main| format!("node {main}"))
    };

    let dev_command = if has_dev {
        Some(node_script_command(package_manager, "dev"))
    } else {
        None
    };

    DeploymentRecommendations {
        build_command,
        start_command,
        install_command: Some(node_install_command(package_manager)),
        dev_command,
        default_port: 3000,
        process_name: Some(package_json.name.clone()),
        requires_build: has_build || is_nextjs,
    }
}

fn local_docker_image_tag(project_path: &Path, project_type: &ProjectType) -> String {
    format!(
        "xbp-{}:latest",
        sanitize_docker_name(&infer_project_name(
            project_path,
            project_type,
            &DeploymentRecommendations {
                build_command: None,
                start_command: None,
                install_command: None,
                dev_command: None,
                default_port: 80,
                process_name: None,
                requires_build: true,
            },
        ))
    )
}

fn local_docker_container_name(project_path: &Path, project_type: &ProjectType) -> String {
    format!(
        "xbp-{}",
        sanitize_docker_name(&infer_project_name(
            project_path,
            project_type,
            &DeploymentRecommendations {
                build_command: None,
                start_command: None,
                install_command: None,
                dev_command: None,
                default_port: 80,
                process_name: None,
                requires_build: true,
            },
        ))
    )
}

fn sanitize_docker_name(value: &str) -> String {
    let mut sanitized = String::with_capacity(value.len());
    let mut previous_was_separator = false;

    for character in value.chars() {
        let normalized = if character.is_ascii_alphanumeric() {
            previous_was_separator = false;
            character.to_ascii_lowercase()
        } else if !previous_was_separator {
            previous_was_separator = true;
            '-'
        } else {
            continue;
        };
        sanitized.push(normalized);
    }

    let sanitized = sanitized.trim_matches('-').to_string();
    if sanitized.is_empty() {
        "app".to_string()
    } else {
        sanitized
    }
}

pub fn recommended_runtime(project_type: &ProjectType) -> Option<ProjectRuntime> {
    match project_type {
        ProjectType::Docker { .. } | ProjectType::DockerCompose { .. } => {
            Some(ProjectRuntime::Container)
        }
        ProjectType::NextJs { .. } | ProjectType::NodeJs { .. } => Some(ProjectRuntime::NativeNode),
        ProjectType::Rust { .. } => Some(ProjectRuntime::NativeRust),
        ProjectType::Railway { .. }
        | ProjectType::Vercel { .. }
        | ProjectType::Python { .. }
        | ProjectType::OpenApi { .. }
        | ProjectType::Terraform { .. }
        | ProjectType::Unknown => None,
    }
}

fn first_available_command(candidates: &[&str]) -> Option<String> {
    let path_var = std::env::var_os("PATH")?;

    for dir in std::env::split_paths(&path_var) {
        for candidate in candidates {
            let plain = dir.join(candidate);
            if plain.is_file() {
                return Some((*candidate).to_string());
            }

            #[cfg(windows)]
            for ext in ["exe", "cmd", "bat"] {
                let with_ext = dir.join(format!("{candidate}.{ext}"));
                if with_ext.is_file() {
                    return Some((*candidate).to_string());
                }
            }
        }
    }

    None
}

fn preferred_pip_command() -> String {
    first_available_command(&["pip3", "pip"]).unwrap_or_else(|| {
        if cfg!(target_os = "windows") {
            "pip".to_string()
        } else {
            "pip3".to_string()
        }
    })
}

#[cfg(test)]
mod tests {
    use super::{
        infer_project_name, infer_target, recommended_runtime, DeploymentRecommendations,
        PackageJsonInfo, ProjectDetector, ProjectHint, ProjectRuntime, ProjectType,
    };
    use std::collections::HashMap;
    use std::fs;
    use std::path::Path;
    use std::sync::atomic::{AtomicU64, Ordering};

    #[test]
    fn infer_name_prefers_process_name_then_manifest_name() {
        let project_type = ProjectType::NodeJs {
            package_json: PackageJsonInfo {
                name: "demo-node".to_string(),
                version: "1.0.0".to_string(),
                scripts: HashMap::new(),
                dependencies: HashMap::new(),
                dev_dependencies: HashMap::new(),
                main: Some("server.js".to_string()),
            },
        };
        let recommendations = DeploymentRecommendations {
            build_command: None,
            start_command: None,
            install_command: None,
            dev_command: None,
            default_port: 3000,
            process_name: Some("preferred-name".to_string()),
            requires_build: false,
        };

        assert_eq!(
            infer_project_name(Path::new("C:/work/demo"), &project_type, &recommendations),
            "preferred-name"
        );
    }

    #[test]
    fn target_and_runtime_mappings_match_control_plane_contracts() {
        let rust = ProjectType::Rust {
            cargo_toml: super::CargoTomlInfo {
                name: "demo".to_string(),
                version: "0.1.0".to_string(),
                description: None,
                authors: vec![],
                edition: Some("2021".to_string()),
            },
        };
        let docker = ProjectType::Docker {
            has_dockerfile: true,
            detected_ports: vec![8080],
        };
        let python = ProjectType::Python {
            has_requirements_txt: true,
            has_pyproject_toml: false,
        };
        let vercel = ProjectType::Vercel {
            has_vercel_json: true,
            has_project_link: false,
        };

        assert_eq!(infer_target(&rust).as_deref(), Some("rust"));
        assert_eq!(recommended_runtime(&rust), Some(ProjectRuntime::NativeRust));
        assert_eq!(
            recommended_runtime(&docker),
            Some(ProjectRuntime::Container)
        );
        assert_eq!(recommended_runtime(&python), None);
        assert_eq!(infer_target(&vercel).as_deref(), Some("vercel"));
        assert_eq!(recommended_runtime(&vercel), None);
    }

    #[tokio::test]
    async fn dockerfile_detection_reads_exposed_ports() {
        let project_root = temp_dir("xbp-build-docker-ports");
        fs::create_dir_all(&project_root).expect("create temp dir");
        fs::write(
            project_root.join("Dockerfile"),
            "FROM alpine\nEXPOSE 8080 3000/tcp\nEXPOSE 8080\n",
        )
        .expect("write dockerfile");

        let detected = ProjectDetector::detect_project_type(&project_root)
            .await
            .expect("detect docker project");

        assert_eq!(
            detected,
            ProjectType::Docker {
                has_dockerfile: true,
                detected_ports: vec![3000, 8080],
            }
        );

        let _ = fs::remove_dir_all(project_root);
    }

    #[test]
    fn docker_recommendations_are_concrete_and_path_aware() {
        let project_root = Path::new("C:/work/My Demo_App");
        let detected = ProjectType::Docker {
            has_dockerfile: true,
            detected_ports: vec![8080],
        };

        let recommendations =
            ProjectDetector::get_deployment_recommendations(project_root, &detected);

        assert_eq!(
            recommendations.build_command.as_deref(),
            Some("docker build -t xbp-my-demo-app:latest .")
        );
        assert_eq!(
            recommendations.start_command.as_deref(),
            Some(
                "docker run -d --rm --name xbp-my-demo-app -p 8080:8080 -e PORT xbp-my-demo-app:latest"
            )
        );
        assert_eq!(recommendations.default_port, 8080);
        assert!(recommendations.requires_build);
    }

    #[test]
    fn detect_project_hints_tracks_multi_manifest_projects_without_duplicates() {
        let project_root = temp_dir("xbp-build-hints");
        fs::create_dir_all(&project_root).expect("create temp dir");
        fs::write(project_root.join("Dockerfile"), "FROM alpine\n").expect("write dockerfile");
        fs::write(project_root.join("docker-compose.yml"), "services: {}\n")
            .expect("write compose");
        fs::write(project_root.join("requirements.txt"), "flask\n").expect("write requirements");
        fs::write(project_root.join("go.mod"), "module demo\n").expect("write go mod");
        fs::write(project_root.join("Cargo.toml"), "[package]\nname='demo'\n")
            .expect("write cargo toml");

        let hints = ProjectDetector::detect_project_hints(&project_root).expect("project hints");

        assert!(hints.contains(&ProjectHint::Docker));
        assert!(hints.contains(&ProjectHint::DockerCompose));
        assert!(hints.contains(&ProjectHint::Python));
        assert!(hints.contains(&ProjectHint::Go));
        assert!(hints.contains(&ProjectHint::Rust));
        assert_eq!(
            hints
                .iter()
                .filter(|hint| matches!(hint, ProjectHint::DockerCompose))
                .count(),
            1
        );

        let _ = fs::remove_dir_all(project_root);
    }

    #[test]
    fn detect_provider_manifests_includes_setup_py_and_go_mod() {
        let project_root = temp_dir("xbp-build-manifests");
        fs::create_dir_all(&project_root).expect("create temp dir");
        fs::write(
            project_root.join("setup.py"),
            "from setuptools import setup\n",
        )
        .expect("write setup.py");
        fs::write(project_root.join("go.mod"), "module demo\n").expect("write go mod");

        let manifests = ProjectDetector::detect_provider_manifests(&project_root);

        assert!(manifests.contains(&"setup.py".to_string()));
        assert!(manifests.contains(&"go.mod".to_string()));

        let _ = fs::remove_dir_all(project_root);
    }

    #[tokio::test]
    async fn vercel_detection_prefers_vercel_manifests_before_generic_nodejs() {
        let project_root = temp_dir("xbp-build-vercel-detection");
        fs::create_dir_all(project_root.join(".vercel")).expect("create .vercel");
        fs::write(
            project_root.join("package.json"),
            r#"{"name":"demo","version":"1.0.0"}"#,
        )
        .expect("write package json");
        fs::write(project_root.join("vercel.json"), "{\n}\n").expect("write vercel json");
        fs::write(
            project_root.join(".vercel").join("project.json"),
            r#"{"projectId":"prj_demo","orgId":"team_demo"}"#,
        )
        .expect("write vercel project link");

        let detected = ProjectDetector::detect_project_type(&project_root)
            .await
            .expect("detect vercel project");

        assert_eq!(
            detected,
            ProjectType::Vercel {
                has_vercel_json: true,
                has_project_link: true,
            }
        );

        let hints = ProjectDetector::detect_project_hints(&project_root).expect("project hints");
        assert!(hints.contains(&ProjectHint::Vercel));

        let manifests = ProjectDetector::detect_provider_manifests(&project_root);
        assert!(manifests.contains(&"vercel.json".to_string()));
        assert!(manifests.contains(&".vercel/project.json".to_string()));

        let _ = fs::remove_dir_all(project_root);
    }

    fn temp_dir(prefix: &str) -> std::path::PathBuf {
        static COUNTER: AtomicU64 = AtomicU64::new(0);
        let unique = COUNTER.fetch_add(1, Ordering::Relaxed);
        std::env::temp_dir().join(format!("{prefix}-{unique}"))
    }
}