#!/usr/bin/env nu

# install.nu — install scripts and config from this repo into the user's home.
#
#   bin/      -> $HOME/bin           (made executable, overwrite silently)
#   config/   -> $HOME/.config/      (mirrored recursively, overwrite silently)
#
# The repo root is resolved relative to this script's own location, so it
# works regardless of the current working directory.

def "repo-root" [] {
    $env.CURRENT_FILE | path dirname | path expand
}

# Recursively mirror a source directory tree into a target directory,
# overwriting existing files and creating needed subdirectories.
# Optionally chmod +x each target file.
def "install-tree" [source_dir: path, target_dir: path, make_exec: bool] {
    if not ($source_dir | path exists) {
        error make { msg: $"Source directory not found: ($source_dir)" }
    }

    mkdir $target_dir

    # Enumerate all files under source_dir (dirs filtered; hidden files included).
    let files = (glob -D $"($source_dir)/**/*")
    if ($files | is-empty) {
        error make { msg: $"No files found in ($source_dir)" }
    }

    let installed = ($files | each { |file|
        let rel = ($file | path relative-to $source_dir)
        let dest = ($target_dir | path join $rel)
        # Ensure the parent directory exists, then copy the file.
        mkdir ($dest | path dirname)
        cp $file $dest
        if $make_exec { chmod +x $dest }
        $dest
    })

    $installed | each { |path| print $"installed: ($path)" }

    let count = ($installed | length)
    print $"installed ($count) entries into ($target_dir)"
}

def "main" [] {
    let root = (repo-root)

    let bin_source = ($root | path join bin)
    let bin_target = ($env.HOME | path join bin | path expand)
    print $"(ansi cyan_bold)Installing scripts(ansi reset)  bin/ -> ($bin_target)"
    install-tree $bin_source $bin_target true

    print ""

    let cfg_source = ($root | path join config)
    let cfg_target = ($env.HOME | path join .config | path expand)
    print $"(ansi cyan_bold)Installing config(ansi reset)  config/ -> ($cfg_target)"
    install-tree $cfg_source $cfg_target false
}