zoi-deps 1.26.1

//! Manages external package dependencies for Zoi.
//!
//! This crate provides the logic to parse dependency strings and interact with
//! various external package managers (e.g. apt, brew, cargo) to install and
//! uninstall dependencies.

use anyhow::{Result, anyhow};
use colored::Colorize;
use dialoguer::Select;
use dialoguer::theme::ColorfulTheme;
pub use zoi_core::dependency::Dependency;
use zoi_core::{types, utils};

include!(concat!(env!("OUT_DIR"), "/generated_managers.rs"));

/// Parses a dependency string with Zoi-specific manager validation.
///
/// Recognized managers include "zoi", "native", and all external managers
/// defined in `managers.json`.
///
/// # Errors
///
/// Returns an error if the dependency string is malformed or uses an
/// unsupported manager.
pub fn parse_dependency_string(dep_str: &str) -> Result<Dependency<'_>> {
    zoi_core::dependency::parse_dependency_string(dep_str, |m| {
        m == "zoi" || m == "native" || MANAGERS.contains_key(m)
    })
}

/// A callback function type for uninstalling a Zoi package by its name.
type ZoiUninstaller = dyn Fn(&str) -> Result<()>;

/// Attempts to remove a dependency using its responsible package manager.
///
/// Note: Zoi cannot guarantee full rollbacks for external package managers
/// as it does not own their internal state.
///
/// # Errors
///
/// Returns an error if:
/// - The dependency string cannot be parsed.
/// - The package manager is not supported for uninstallation.
/// - The uninstallation command fails to execute.
pub fn uninstall_dependency(
    dep_str: &str,
    zoi_uninstaller: &ZoiUninstaller
) -> Result<()> {
    let dep = parse_dependency_string(dep_str)?;
    println!(
        "-> Attempting to uninstall dependency: {} via {}",
        dep.package.cyan(),
        dep.manager.yellow()
    );

    if dep.manager == "zoi" {
        return zoi_uninstaller(dep.package);
    }

    if let Some(pm_commands) = MANAGERS.get(dep.manager) {
        let mut uninstall_cmd =
            pm_commands.uninstall.replace("{package}", dep.package);

        if pm_commands.sudo_uninstall && !utils::is_admin() {
            if let Some(escalator) = utils::get_privilege_escalator() {
                uninstall_cmd = format!("{escalator} {uninstall_cmd}");
            } else {
                eprintln!(
                    "{}: root privileges are required for '{}' but neither \
                     'sudo' nor 'doas' was found. Attempting to run without \
                     escalation...",
                    "Warning".yellow(),
                    dep.manager
                );
            }
        }

        println!("Running uninstall command: {}", uninstall_cmd.italic());
        utils::run_shell_command(&uninstall_cmd)
    } else {
        Err(anyhow!(
            "Unknown or unsupported package manager for uninstall: {}",
            dep.manager
        ))
    }
}

/// Recursively collects all dependencies for a package, including sub-package
/// specific ones.
///
/// This function handles the complex logic of:
/// - Required Dependencies: Automatically added to the list.
/// - Optional Dependencies: Prompts the user (unless `--all-optional` or
///   `--yes` is used).
/// - Selectable Options: Prompts the user to choose between multiple providers.
/// - Recursive Sub-packages: Follows `sub_packages` maps to pull in
///   component-specific requirements.
///
/// # Errors
///
/// Returns an error if any of the underlying dependency collection or prompting
/// operations fail.
pub fn collect_dependencies_for_group(
    group: &types::DependencyGroup,
    sub_package_name: Option<&str>,
    dep_type: Option<&str>,
    yes: bool,
    all_optional: bool
) -> Result<(Vec<String>, Vec<String>, Vec<String>)> {
    let mut deps = Vec::new();
    let mut chosen_options = Vec::new();
    let mut chosen_optionals = Vec::new();

    match group {
        types::DependencyGroup::Simple(d) => {
            deps.extend(d.clone());
        }
        types::DependencyGroup::Complex(g) => {
            deps.extend(g.required.clone());

            let options = prompt_for_options(&g.options, yes)?;
            chosen_options.extend(options.clone());
            deps.extend(options);

            let optionals =
                prompt_for_optionals(&g.optional, dep_type, yes, all_optional)?;
            chosen_optionals.extend(optionals.clone());
            deps.extend(optionals);

            if let Some(sub_name) = sub_package_name
                && let Some(sub_deps_map) = &g.sub_packages
                && let Some(sub_dep_group) = sub_deps_map.get(sub_name)
            {
                let (sub_d, sub_co, sub_coo) = collect_dependencies_for_group(
                    sub_dep_group,
                    None,
                    dep_type,
                    yes,
                    all_optional
                )?;
                deps.extend(sub_d);
                chosen_options.extend(sub_co);
                chosen_optionals.extend(sub_coo);
            }
        }
    }
    Ok((deps, chosen_options, chosen_optionals))
}

/// Presents interactive choices for selectable dependency groups.
///
/// # Errors
///
/// Returns an error if user interaction via the terminal fails or if a
/// dependency string is invalid.
pub fn prompt_for_options(
    option_groups: &[types::DependencyOptionGroup],
    yes: bool
) -> Result<Vec<String>> {
    let mut chosen = Vec::new();
    if option_groups.is_empty() {
        return Ok(chosen);
    }

    for group in option_groups {
        println!(
            "{} There are {} options available for {}:",
            "::".bold().blue(),
            group.depends.len(),
            group.desc.italic()
        );

        let parsed_deps: Vec<_> = group
            .depends
            .iter()
            .map(|d| parse_dependency_string(d))
            .collect::<Result<_>>()?;

        if yes {
            if group.all {
                println!(
                    "--yes provided, selecting all options for '{}'",
                    group.name
                );
                chosen.extend(group.depends.clone());
            } else {
                println!(
                    "--yes provided, selecting first option for '{}'",
                    group.name
                );
                if let Some(dep) = group.depends.first() {
                    chosen.push(dep.clone());
                }
            }
            continue;
        }

        if group.all {
            let items: Vec<_> = parsed_deps
                .iter()
                .map(|d| {
                    format!(
                        "{}:{} - {}",
                        d.manager,
                        d.package,
                        d.description.unwrap_or("No description")
                    )
                })
                .collect();
            let selections =
                dialoguer::MultiSelect::with_theme(&ColorfulTheme::default())
                    .with_prompt(
                        "Choose which to install (space to select, enter to \
                         confirm)"
                    )
                    .items(&items)
                    .interact()?;

            for i in selections {
                if let Some(dep) = group.depends.get(i) {
                    chosen.push(dep.clone());
                }
            }
        } else {
            let items: Vec<_> = parsed_deps
                .iter()
                .map(|d| {
                    format!(
                        "{}:{} - {}",
                        d.manager,
                        d.package,
                        d.description.unwrap_or("No description")
                    )
                })
                .collect();
            let selection = Select::with_theme(&ColorfulTheme::default())
                .with_prompt("Choose one to install")
                .items(&items)
                .default(0)
                .interact()?;
            if let Some(dep) = group.depends.get(selection) {
                chosen.push(dep.clone());
            }
        }
    }
    Ok(chosen)
}

/// Prompts the user to install optional dependencies.
///
/// # Errors
///
/// Returns an error if user interaction via the terminal fails or if a
/// dependency string is invalid.
pub fn prompt_for_optionals(
    deps: &[String],
    dep_type: Option<&str>,
    yes: bool,
    all_optional: bool
) -> Result<Vec<String>> {
    if deps.is_empty() {
        return Ok(Vec::new());
    }

    let type_str = dep_type.map(|s| format!("{s} ")).unwrap_or_default();

    if all_optional {
        println!(
            "{} Installing all optional {}dependencies...",
            "::".bold().blue(),
            type_str
        );
        return Ok(deps.to_vec());
    }

    if yes {
        println!(
            "{} Skipping optional {}dependencies (--yes provided without \
             --all-optional).",
            "::".bold().yellow(),
            type_str
        );
        return Ok(Vec::new());
    }

    let items: Vec<_> = deps
        .iter()
        .map(|d| {
            parse_dependency_string(d).map(|dep| {
                format!(
                    "{}:{} - {}",
                    dep.manager,
                    dep.package,
                    dep.description.unwrap_or("No description")
                )
            })
        })
        .collect::<Result<_>>()?;

    let selections =
        dialoguer::MultiSelect::with_theme(&ColorfulTheme::default())
            .with_prompt(format!(
                "Select optional {type_str}dependencies to install"
            ))
            .items(&items)
            .defaults(&vec![false; deps.len()])
            .interact()?;

    let mut chosen = Vec::new();
    for i in selections {
        if let Some(dep) = deps.get(i) {
            chosen.push(dep.clone());
        }
    }
    Ok(chosen)
}