#!/usr/bin/env nu
# .ontoref/gen-registry.nu
# Reads registry.ncl, validates project paths, and writes registry.toml.
# registry.ncl is the source of truth; registry.toml is derived — do not edit it by hand.

def main [] {
    let script_dir = ($env.CURRENT_FILE | path dirname)
    let ncl_file   = $"($script_dir)/registry.ncl"
    let toml_file  = $"($script_dir)/registry.toml"

    let result = (do { ^nickel export --format json $ncl_file } | complete)
    if $result.exit_code != 0 {
        error make { msg: $"nickel export failed:\n($result.stderr)" }
    }

    let registry = ($result.stdout | from json)

    let valid_projects = ($registry.projects | each { |p|
        if ($p.root | path exists) {
            $p
        } else {
            print $"  (ansi yellow)WARN(ansi reset) project '($p.slug)': root not found at ($p.root) — skipping"
            null
        }
    } | compact)

    let skipped = ($registry.projects | length) - ($valid_projects | length)
    if $skipped > 0 {
        print $"  (ansi yellow)($skipped) project(s) skipped due to missing paths(ansi reset)"
    }

    { projects: $valid_projects } | to toml | save -f $toml_file

    print $"  (ansi green)OK(ansi reset) ($valid_projects | length) project\(s\) written to ($toml_file)"
}