package releasekit_test

import (
	"context"
	"errors"
	"io"
	"net/http"
	"net/http/httptest"
	"runtime"
	"strings"
	"testing"

	releasekit "go.maximumdirect.net/releasekit"
)

func TestDeliveryPreservesAssetInspectionCauses(t *testing.T) {
	repository := newTaggedDeliveryConsumer(t)
	prebuilt, err := releasekit.Build(context.Background(), releasekit.BuildRequest{
		RepositoryDir: repository, Version: "v1.2.3", OutputDir: t.TempDir(),
		Spec: releasekit.BuildSpec{MainPackage: "./cmd/app", BinaryName: "fixture", Targets: []releasekit.Target{{OS: runtime.GOOS, Arch: runtime.GOARCH}}},
	})
	if err != nil {
		t.Fatal(err)
	}
	filename := prebuilt.Artifacts[0].Filename
	for _, cause := range []error{context.Canceled, io.ErrUnexpectedEOF} {
		t.Run(cause.Error(), func(t *testing.T) {
			ctx, cancel := context.WithCancel(context.Background())
			defer cancel()
			state := &facadeDeliveryServer{data: facadeDeliveryData{
				t: t, commit: prebuilt.CandidateCommit, tag: prebuilt.Tag, version: prebuilt.Version,
				noteBody: "# Fixture v1.2.3\n\nDelivery fixture.\n",
				pages:    map[string]bool{prebuilt.Tag: true}, assets: map[string][]byte{filename: []byte("data")},
			}}
			server := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				if strings.HasPrefix(r.URL.Path, "/files/") {
					if cause == context.Canceled {
						cancel()
						<-r.Context().Done()
						return
					}
					w.Header().Set("Content-Length", "100")
					_, _ = w.Write([]byte("truncated"))
					return
				}
				state.serveHTTP(w, r)
			}))
			state.data.url = "http://" + server.Listener.Addr().String()
			server.Start()
			defer server.Close()
			result, err := releasekit.Deliver(ctx, releasekit.DeliveryRequest{
				RepositoryDir: repository, Product: "Fixture", Version: "v1.2.3",
				Destination: facadeDeliveryDestination(server.URL), Prebuilt: &prebuilt,
			})
			if !errors.Is(err, cause) || !strings.Contains(err.Error(), filename) {
				t.Fatalf("Deliver() error = %v, want cause %v and asset context", err, cause)
			}
			if result.State != releasekit.DeliveryNotAttempted || len(result.Uncertain) != 1 || result.Uncertain[0].Filename != filename || state.snapshot().writes != 0 {
				t.Fatalf("result = %#v, want read-only uncertain asset without write", result)
			}
		})
	}
}