package main

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

// ADR 0593 §1: a source that imports a package mesh-sdk gave up, or names the build runner through mesh-sdk's buildstep, is
// refused naming where it went; the contract that stays, the runner's own package and a testdata copy are not.
func TestFindingsRefuseWhatMeshSDKGaveUp(t *testing.T) {
	const head = "package x\n\nimport (\n"
	for _, row := range []struct {
		name, file, src string
		want            string // empty: clean
	}{
		{"clean", "modules/a/x.go", head + "\t\"git.novox.be/novox/mesh-sdk/go/delivery\"\n)\n\nvar _ = delivery.StepsState\n", ""},
		{"a removed package", "modules/a/x.go", head + "\t\"git.novox.be/novox/mesh-sdk/go/compose\"\n)\n\nvar _ = compose.Resolve\n", "imports git.novox.be/novox/mesh-sdk/go/compose, which left mesh-sdk; it is the node-engine"},
		{"under a removed package", "modules/a/x_test.go", head + "\t\"git.novox.be/novox/mesh-sdk/go/compose/frombus\"\n)\n", "the node-engine"},
		{"buildcpu", "checks/c/x.go", head + "\t\"git.novox.be/novox/mesh-sdk/go/buildcpu\"\n)\n", "buildstep/buildcpu"},
		{"the runner through mesh-sdk's buildstep", "modules/a/x.go", head + "\t\"git.novox.be/novox/mesh-sdk/go/buildstep\"\n)\n\nvar _ = buildstep.RunAsk\n", "uses buildstep.RunAsk, which is the build runner's"},
		{"the runner through an alias", "modules/a/x.go", head + "\tsdkstep \"git.novox.be/novox/mesh-sdk/go/buildstep\"\n)\n\nvar _ = sdkstep.Puller{}\n", "uses sdkstep.Puller"},
		{"the contract of buildstep", "modules/a/x.go", head + "\t\"git.novox.be/novox/mesh-sdk/go/buildstep\"\n)\n\nvar _ = buildstep.NewID\nvar _ buildstep.Failure\n", ""},
		{"the runner's own package", "modules/a/x.go", head + "\t\"git.novox.be/novox/mesh-catalog/modules/mesh-build-go/buildstep\"\n)\n\nvar _ = buildstep.RunAsk\n", ""},
		{"a copy in testdata", "modules/a/testdata/x.go", head + "\t\"git.novox.be/novox/mesh-sdk/go/compose\"\n)\n", ""},
	} {
		t.Run(row.name, func(t *testing.T) {
			root := t.TempDir()
			p := filepath.Join(root, row.file)
			if err := os.MkdirAll(filepath.Dir(p), 0o755); err != nil {
				t.Fatal(err)
			}
			if err := os.WriteFile(p, []byte(row.src), 0o644); err != nil {
				t.Fatal(err)
			}
			got, err := Findings(root)
			if err != nil {
				t.Fatal(err)
			}
			if all := strings.Join(got, "\n"); (row.want == "") != (all == "") || !strings.Contains(all, row.want) {
				t.Fatalf("findings = %q, want one containing %q", all, row.want)
			}
		})
	}
}

// The script's run of this check over the real tree (novox/hq ADR 0529 clause 2).
func TestTheCatalogueImportsNothingMeshSDKGaveUp(t *testing.T) {
	got, err := Findings(filepath.Join("..", ".."))
	if err != nil {
		t.Fatal(err)
	}
	for _, f := range got {
		t.Error(f)
	}
}