package builder

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	"github.com/novox/mesh-controller/internal/catalogue"
)

// novox/hq ADR 0193: every entrypoint the runtime may serve is executable, and the runtime knows no
// language — so a TypeScript bundle carries a launcher beside each entrypoint.
func TestATypeScriptBundleCarriesAnExecutableLauncherBesideEachEntrypoint(t *testing.T) {
	root := t.TempDir()
	chain, err := ToolchainFor("typescript")
	if err != nil {
		t.Fatal(err)
	}
	got, err := writeLaunchers(root, chain, catalogue.Artifact{Name: "tools", Kind: catalogue.ArtifactBundle,
		Language: "typescript", Entrypoints: []string{"tools/index.js", "index.js"}})
	if err != nil {
		t.Fatal(err)
	}
	if got["tools/index.js"] != "tools/index.serve.mjs" || got["index.js"] != "index.serve.mjs" {
		t.Fatalf("launchers: %v", got)
	}
	path := filepath.Join(root, "tools", "index.serve.mjs")
	info, err := os.Stat(path)
	if err != nil {
		t.Fatal(err)
	}
	if info.Mode().Perm() != 0o755 {
		t.Errorf("the launcher is %v, not executable 0755", info.Mode().Perm())
	}
	body, _ := os.ReadFile(path)
	for _, want := range []string{"#!/usr/bin/env node\n", `from "@novox/mesh-sdk/stdio"`, `await import("./index.js")`, "serveRegisteredOverStdio()"} {
		if !strings.Contains(string(body), want) {
			t.Errorf("the launcher lacks %q:\n%s", want, body)
		}
	}

	// A compiled language's build is executable already: no launcher.
	goChain, _ := ToolchainFor("go")
	none, err := writeLaunchers(t.TempDir(), goChain, catalogue.Artifact{Name: "tools", Kind: catalogue.ArtifactBundle, Language: "go"})
	if err != nil || len(none) != 0 {
		t.Errorf("a Go bundle was given launchers: %v %v", none, err)
	}
}