package buildstep

import (
	"context"
	"encoding/json"
	"sync"
	"testing"
	"time"

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

// 1921/S10 (the operator's yes to D1, ADR 0541): a check's levels run side by side: the integration level has started
// before the unit level ends. The answer holds the levels in their order, so with the unit level failing it still names
// the unit level first; the integration level's answer is kept after it for the log.
func TestACheckRunsItsLevelsSideBySideAndAnswersThemInOrder(t *testing.T) {
	integrationStarted := make(chan struct{})
	var once sync.Once
	var mu sync.Mutex
	unitWaited := false
	steps := AskSteps{
		Fetch: func(context.Context, map[string]any) (any, error) {
			return map[string]any{"workspace": "/w", "modules": []string{"."}}, nil
		},
		Test: func(ctx context.Context, args map[string]any) (any, error) {
			switch args["level"] {
			case delivery.LevelUnit:
				select {
				case <-integrationStarted:
					mu.Lock()
					unitWaited = true
					mu.Unlock()
				case <-time.After(2 * time.Second):
				}
				return map[string]any{"passed": false, "level": "unit"}, nil
			default:
				once.Do(func() { close(integrationStarted) })
				return map[string]any{"passed": true, "level": "integration"}, nil
			}
		},
	}
	out, err := RunAsk(context.Background(), steps, ask(delivery.CheckJob{Levels: []string{delivery.LevelUnit, delivery.LevelIntegration},
		Fetch: map[string]any{"repository": "novox/x", "commit": runCommit}}))
	if err != nil {
		t.Fatal(err)
	}
	mu.Lock()
	defer mu.Unlock()
	if !unitWaited {
		t.Error("the integration level did not start while the unit level ran")
	}
	a := out.(delivery.CheckAnswer)
	if len(a.Levels) != 2 || a.Levels[0].Level != delivery.LevelUnit || a.Levels[1].Level != delivery.LevelIntegration {
		t.Fatalf("levels %+v, want unit then integration", a.Levels)
	}
	var first struct{ Passed bool }
	if err := json.Unmarshal(a.Levels[0].Tests[0], &first); err != nil || first.Passed {
		t.Errorf("the first level's result %s, want the unit level's failure", a.Levels[0].Tests[0])
	}
}