package main

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

	"git.novox.be/novox/mesh-sdk/go/buildstep"
)

func fixture(t *testing.T) string {
	t.Helper()
	d := t.TempDir()
	os.MkdirAll(filepath.Join(d, "sub"), 0o755)
	os.WriteFile(filepath.Join(d, "a.txt"), []byte("alpha"), 0o644)
	os.WriteFile(filepath.Join(d, "sub", "run"), []byte("#!/bin/sh\n"), 0o755)
	return d
}

func TestPackFixtureTwiceGivesBuildstepsDigest(t *testing.T) {
	d := fixture(t)
	_, want, err := buildstep.Pack(d)
	if err != nil {
		t.Fatal(err)
	}
	for i := 0; i < 2; i++ {
		got, err := run([]string{"-pack", d, "-out", filepath.Join(t.TempDir(), "x.tgz")})
		if err != nil || got != want {
			t.Fatalf("run %d: %q, %v; want %q", i, got, err, want)
		}
	}
}

func TestBuildTwiceGivesOneDigestAndRecipeArgs(t *testing.T) {
	m := t.TempDir()
	os.WriteFile(filepath.Join(m, "go.mod"), []byte("module x\n\ngo 1.21\n"), 0o644)
	os.MkdirAll(filepath.Join(m, "cmd", "p"), 0o755)
	os.WriteFile(filepath.Join(m, "cmd", "p", "main.go"), []byte("package main\n\nvar builtFor string\n\nfunc main() { println(builtFor) }\n"), 0o644)
	args := []string{"-dir", m, "-from", "cmd/p", "-binary", "p", "-system", "arch"}
	a, err := run(args)
	if err != nil {
		t.Skipf("no go toolchain that builds offline: %v", err)
	}
	b, err := run(args)
	if err != nil || a != b {
		t.Fatalf("two builds: %q, %q, %v", a, b, err)
	}
	got := Args("/d", "./cmd/p/", "/o", "p", "arch")
	if got[len(got)-1] != "./cmd/p" || got[4] != "-s -w -X main.builtFor=arch" {
		t.Fatalf("args %v", got)
	}
}