package build

import (
	"context"
	"encoding/json"
	"os"
	"strings"
	"testing"
	"time"

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

// result reads a captured step value of mesh-build-image (testdata/captured/README) and returns its result.
func captured(t *testing.T, name string) json.RawMessage {
	t.Helper()
	raw, err := os.ReadFile("testdata/captured/" + name)
	if err != nil {
		t.Fatal(err)
	}
	var step delivery.Step
	if err := json.Unmarshal(raw, &step); err != nil {
		t.Fatalf("%s: %v", name, err)
	}
	if step.State != delivery.StepPassed || len(step.Result) == 0 {
		t.Fatalf("%s: state %q, result %s, want a passed step with a result", name, step.State, step.Result)
	}
	return step.Result
}

// The captured image steps, run as a pulled ask runs them (buildstep.RunAsk), answer what the builder reads: the trunk's
// build its digest and reference, a candidate's its digest and no reference (issue 1887 A4a).
func TestCapturedImageStepsDecodeWithTheBuildersOwnTypes(t *testing.T) { // review r2, mesh-catalog 2; ADR 0487 clause 1
	for _, tc := range []struct {
		build   string
		publish bool
		ref     bool
	}{{"build-trunk.json", true, true}, {"build-candidate.json", false, false}} {
		steps := buildstep.AskSteps{
			Fetch: func(context.Context, map[string]any) (any, error) {
				return json.RawMessage(captured(t, "fetch.json")), nil
			},
			Build: func(context.Context, map[string]any) (any, error) { return json.RawMessage(captured(t, tc.build)), nil },
		}
		ask := delivery.StepAsk{ID: buildstep.NewID(), Kind: delivery.AskDelivery, Language: delivery.AskImage, Asker: delivery.BuilderModule,
			At: time.Now(), Build: &delivery.BuildJob{Module: "m", Path: "modules/m", Publish: tc.publish,
				Fetch:     map[string]any{"repository": "novox/mesh-catalog", "commit": strings.Repeat("a", 40)},
				Artifacts: []delivery.AskArtifact{{Artifact: "server"}}}}
		out, err := buildstep.RunAsk(context.Background(), steps, ask)
		if err != nil {
			t.Fatalf("%s: %v", tc.build, err)
		}
		a := out.(delivery.BuildAnswer)
		if len(a.Artifacts) != 1 || a.Artifacts[0].Digest == "" || (a.Artifacts[0].Reference != "") != tc.ref {
			t.Errorf("%s answered %+v, want a digest and a reference only for the trunk", tc.build, a)
		}
	}
}