#!/usr/bin/env nu
# Destroy an ephemeral buildkit runner VM by lease_id label.
# Idempotent: exits 0 with status="not_found" when the server is already gone.
# Outputs JSON {status, lease_id, server_id?} to stdout.

use std log

def main [
    --lease_id: string
]: nothing -> nothing {
    if ($lease_id | is-empty) {
        error make { msg: "--lease_id is required" }
    }

    let list_out = do {
        ^hcloud server list --selector $"lease_id=($lease_id)" --output json
    } | complete
    if $list_out.exit_code != 0 {
        error make { msg: $"hcloud server list failed:\n($list_out.stderr)" }
    }

    let servers = $list_out.stdout | from json
    if ($servers | length) == 0 {
        log info $"No server found for lease_id=($lease_id) — already destroyed or never created."
        { status: "not_found", lease_id: $lease_id } | to json
        return
    }

    if ($servers | length) > 1 {
        log warning $"Multiple servers found for lease_id=($lease_id) — destroying all ($servers | length)."
    }

    for server in $servers {
        let server_id = $server.id
        let server_name = $server.name
        log info $"Deleting server ($server_name) id=($server_id)..."
        let del_out = do { ^hcloud server delete $server_id } | complete
        if $del_out.exit_code != 0 {
            error make { msg: $"hcloud server delete ($server_id) failed:\n($del_out.stderr)" }
        }
        log info $"Server ($server_name) id=($server_id) deleted."
    }

    let first_id = $servers | first | get id
    { status: "deleted", lease_id: $lease_id, server_id: $first_id } | to json
}