package build

import (
	"context"
	"errors"
	"strings"
	"testing"
	"time"

	"git.novox.be/novox/mesh-delivery/modules/mesh-delivery-builder/builds"
	"git.novox.be/novox/mesh-delivery/modules/mesh-delivery-contracts/go/seats/meshbuilds"
	"git.novox.be/novox/mesh-delivery/modules/mesh-delivery-contracts/go/seats/meshcatalog"
	"git.novox.be/novox/mesh-sdk/go/catalogue"
)

// The runner's build step ask is the builder's one entry point for a candidate (design 47 G A-97): each entry is read by its
// fingerprint, built through the one claim, and the step's end says passed only for a build that is done.
func TestABuildStepAnswersItsEnd(t *testing.T) {
	r := newRig(t, catalogue.Artifact{Name: "files", Kind: "archive"})
	entryOf := func(fp, commit string) meshcatalog.CatalogEntry {
		return meshcatalog.CatalogEntry{Module: "m", Repository: "novox/m", Commit: commit, Fp: fp, ManifestDigest: mdigest('a'), Path: "."}
	}
	r.b.StepEntry = func(_ context.Context, fp string) (meshcatalog.CatalogEntry, error) {
		if fp == fp1 {
			return entryOf(fp1, "c1"), nil
		}
		return meshcatalog.CatalogEntry{}, errors.New("not found")
	}
	ask := func(entries ...meshbuilds.BuildEntry) meshbuilds.StepEnded {
		return r.b.BuildStep(t.Context(), meshbuilds.StepRun{Pipeline: "main.1.m", Step: meshbuilds.StepRunStepBuild, Entries: entries})
	}
	if end := ask(); end.Outcome != meshbuilds.StepEndedOutcomeNothingToRun {
		t.Errorf("an ask naming no entry: %+v", end)
	}
	if end := ask(meshbuilds.BuildEntry{Module: "m", Fingerprint: "src2:" + strings.Repeat("2", 64)}); end.Outcome != meshbuilds.StepEndedOutcomeCouldNotRun || !strings.Contains(end.Said, "cannot be read") {
		t.Errorf("an entry the seat does not hold: %+v", end)
	}
	if end := ask(meshbuilds.BuildEntry{Module: "m", Fingerprint: fp1, Commit: "other"}); end.Outcome != meshbuilds.StepEndedOutcomeCouldNotRun {
		t.Errorf("an entry at another commit: %+v", end)
	}
	// A build already done is passed at once, naming each entry as it was asked.
	done, _ := builds.EncodeBuilderBuild(builds.BuilderBuild{State: builds.BuildDone, Manifest: mdigest('a')})
	if _, err := r.st.Create(t.Context(), r.key, done); err != nil {
		t.Fatal(err)
	}
	entries := []meshbuilds.BuildEntry{{Module: "m", Fingerprint: fp1, Commit: "c1"}}
	if end := ask(entries...); end.Outcome != meshbuilds.StepEndedOutcomePassed || end.Step != meshbuilds.StepEndedStepBuild || len(end.Entries) != 1 || end.Entries[0].Commit != "c1" || end.Pipeline != "main.1.m" {
		t.Errorf("a done build: %+v", end)
	}
}

// A step ask waits for the end of its build without a timer: the log entry of that end wakes it (design 47 G A-97).
func TestAStepAskIsWokenByItsBuildsEnd(t *testing.T) {
	r := newRig(t)
	key := r.key
	ch := r.b.awaitEnd(key)
	r.b.stepEnded(builds.BuildLogEntry{Event: builds.BuildStartedEvent, Module: "m", FP: fp1}) // a start wakes nothing
	select {
	case <-ch:
		t.Fatal("a build's start woke the wait")
	default:
	}
	r.b.stepEnded(builds.BuildLogEntry{Event: builds.BuildEndedEvent, Module: "m", FP: fp1, Outcome: builds.BuildDone})
	select {
	case e := <-ch:
		if e.Outcome != builds.BuildDone {
			t.Errorf("end = %+v", e)
		}
	case <-time.After(time.Second):
		t.Fatal("the end of the build did not wake the wait")
	}
	r.b.dropEnd(key, ch)
	if len(r.b.stepWaits) != 0 {
		t.Errorf("waits left: %v", r.b.stepWaits)
	}
}