package build

import (
	"errors"

	"strings"
	"testing"

	"git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/buildrun"
	"git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds"

	"git.novox.be/novox/mesh-sdk/go/catalogue"
	"git.novox.be/novox/mesh-sdk/go/seatdef"
)

// manifestOf is a manifest holding these artifacts: the plan reads only their name, kind and language.
func manifestOf(artifacts ...catalogue.Artifact) catalogue.Manifest {
	return catalogue.Manifest{Module: "m", Build: &catalogue.Build{Artifacts: artifacts}}
}

func TestPlanRoutesEachKindToItsBuildModule(t *testing.T) { // 1607/AC2
	m := manifestOf(
		catalogue.Artifact{Name: "tool", Kind: "bundle", Language: "go"},
		catalogue.Artifact{Name: "web", Kind: "bundle", Language: "typescript"},
		catalogue.Artifact{Name: "files", Kind: "archive"},
		catalogue.Artifact{Name: "go-overlay", Kind: "package", Language: "go"}) // design 47 G §370: a Go package is built
	p, err := PlanOf(m, testSeats())
	if err != nil {
		t.Fatal(err)
	}
	want := []Task{
		{Artifact: "files", Kind: "archive", Module: testGo, Language: "go"},
		{Artifact: "go-overlay", Kind: "package", Module: testGo, Language: "go"},
		{Artifact: "tool", Kind: "bundle", Module: testGo, Language: "go"},
		{Artifact: "web", Kind: "bundle", Module: testNode, Language: "typescript"},
	}
	if len(p.Tasks) != len(want) {
		t.Fatalf("tasks = %+v, want %+v", p.Tasks, want)
	}
	for i := range want {
		if p.Tasks[i] != want[i] {
			t.Errorf("task %d = %+v, want %+v", i, p.Tasks[i], want[i])
		}
	}
	if modules := p.Modules(); len(modules) != 2 || modules[0] != testGo || modules[1] != testNode {
		t.Errorf("modules = %v", modules)
	}
}

const pinned = "nats:2.11.17-alpine@sha256:3333333333333333333333333333333333333333333333333333333333333333"

func TestPlanSendsAPinnedUpstreamToTheImageBuildModulesCopyAndRefusesAnUnpinnedOne(t *testing.T) { // B3, ADR 0498 clause 4
	p, err := PlanOf(manifestOf(catalogue.Artifact{Name: "ok", Kind: "archive"}, catalogue.Artifact{Name: "up", Kind: "upstream", From: pinned}), testSeats())
	if err != nil || len(p.Tasks) != 2 {
		t.Fatalf("plan %+v, error %v", p, err)
	}
	if up := p.Tasks[1]; up.Artifact != "up" || up.Kind != "upstream" || up.Module != testImage || up.From != pinned || up.Language != "" {
		t.Errorf("task = %+v, want the upstream sent to %s with its pinned reference and no toolchain", up, testImage)
	}
	if p.NeedsToolchain(testImage) {
		t.Error("a copy needs no toolchain")
	}
	_, err = PlanOf(manifestOf(catalogue.Artifact{Name: "up", Kind: "upstream", From: "nats:2.11.17-alpine"}), testSeats())
	if err == nil || !strings.HasPrefix(err.Error(), builds.NotPinned+"up") || !builds.FailedUntilChanged(err.Error()) {
		t.Errorf("an upstream with no digest: error = %v, want it to open %q naming the artifact", err, builds.NotPinned)
	}
}

func TestPlanRefusesAPackageOfAnotherLanguageByName(t *testing.T) { // ADR 0498 clause 5
	_, err := PlanOf(manifestOf(catalogue.Artifact{Name: "ok", Kind: "archive"}, catalogue.Artifact{Name: "pkg", Kind: "package", Language: "python"}), testSeats())
	var r *Refused
	if err == nil || !asRefused(err, &r) || !strings.HasPrefix(err.Error(), builds.RefusedKind) || !strings.Contains(err.Error(), "python") || !strings.Contains(err.Error(), "pkg") {
		t.Errorf("error = %v, want it to open %q naming the artifact and its language", err, builds.RefusedKind)
	}
}

func TestPlanRefusesABundleOfAnotherLanguageAndAModuleWithNoArtifact(t *testing.T) {
	if _, err := PlanOf(manifestOf(catalogue.Artifact{Name: "x", Kind: "bundle", Language: "python"}), testSeats()); err == nil || !strings.HasPrefix(err.Error(), builds.RefusedKind) {
		t.Errorf("a python bundle: error = %v, want a refusal", err)
	}
	p, err := PlanOf(manifestOf(), testSeats())
	if err != nil || len(p.Tasks) != 0 {
		t.Errorf("no artifact: plan %+v error %v, want an empty plan", p, err)
	}
}

func asRefused(err error, target **Refused) bool { return errors.As(err, target) }

func TestPlanSendsAnImageToMeshBuildImageWithNoToolchain(t *testing.T) { // 1705a, ADR 0487 clause 5
	p, err := PlanOf(manifestOf(catalogue.Artifact{Name: "img", Kind: "image"}, catalogue.Artifact{Name: "files", Kind: "archive"}), testSeats())
	if err != nil || len(p.Tasks) != 2 {
		t.Fatalf("plan %+v, error %v", p, err)
	}
	if p.Tasks[1].Artifact != "img" || p.Tasks[1].Module != testImage {
		t.Errorf("task = %+v, want the image on %s", p.Tasks[1], testImage)
	}
	if p.NeedsToolchain(testImage) {
		t.Error("an image needs no toolchain")
	}
}

// A plan's task names the holder of the build seat the seat list and the catalog half give, and a plan made before they name one
// is no refusal and is not kept (design 47 G A-82).
func TestAPlanNamesTheHoldersOfTheBuildSeats(t *testing.T) {
	m := manifestOf(catalogue.Artifact{Name: "tool", Kind: "bundle", Language: "go"}, catalogue.Artifact{Name: "img", Kind: "image"})
	defs := map[string]seatdef.Definition{
		"node-build-go":    {Acts: []seatdef.ActingRule{{Step: seatdef.StepBuild, On: "go"}}},
		"node-build-image": {Acts: []seatdef.ActingRule{{Step: seatdef.StepBuild, On: seatdef.OnKindImage}}},
	}
	holders := map[string]string{}
	seats := buildrun.NewBuildSeats(func() map[string]seatdef.Definition { return defs }, func(s string) (string, bool) { h, ok := holders[s]; return h, ok })
	_, err := PlanOf(m, seats)
	var none *NoBuildModule
	if !errors.As(err, &none) {
		t.Fatalf("with no holder: %v, want NoBuildModule", err)
	}
	holders["node-build-go"], holders["node-build-image"] = "acme-go", "acme-img"
	p, err := PlanOf(m, seats)
	if err != nil || len(p.Tasks) != 2 || p.Tasks[0].Module != "acme-img" || p.Tasks[1].Module != "acme-go" || p.Tasks[1].Language != "go" || p.Tasks[0].Language != "" {
		t.Fatalf("plan = %+v, %v", p, err)
	}
}