package pkg_test

//go:generate go build -tags testtool -ldflags "-extldflags='-static'" -o testdata/testtool ./testdata

import (
	_ "embed"
	"errors"
	"log"
	"os"
	"os/exec"
	"testing"

	"hakurei.app/container/check"
	"hakurei.app/container/stub"
	"hakurei.app/hst"
	"hakurei.app/internal/pkg"
	"hakurei.app/message"
)

// testtoolBin is the container test tool binary made available to the
// execArtifact for testing its curing environment.
//
//go:embed testdata/testtool
var testtoolBin []byte

func TestExec(t *testing.T) {
	t.Parallel()

	checkWithCache(t, []cacheTestCase{
		{"container", nil, func(t *testing.T, base *check.Absolute, c *pkg.Cache) {
			c.SetStrict(true)

			// this is built during go:generate and is not deterministic
			testtool := overrideIdent{pkg.ID{0xfe, 0xff}, stubArtifact{
				kind: pkg.KindTar,
				cure: func(c *pkg.CureContext) error {
					work := c.GetWorkDir()
					if err := os.MkdirAll(
						work.Append("bin").String(),
						0700,
					); err != nil {
						return err
					}
					return os.WriteFile(c.GetWorkDir().Append(
						"bin",
						"testtool",
					).String(), testtoolBin, 0500)
				},
			}}

			msg := message.New(log.New(os.Stderr, "container: ", 0))
			msg.SwapVerbose(testing.Verbose())

			cureMany(t, c, []cureStep{
				{"container", pkg.NewExec(
					t.Context(),
					msg,
					0,
					check.MustAbs("/work"),
					[]string{"HAKUREI_TEST=1"},
					check.MustAbs("/opt/bin/testtool"),
					[]string{"testtool"},

					pkg.MustPath("/file", newStubFile(
						pkg.KindHTTPGet,
						pkg.ID{0xfe, 0},
						nil,
						nil, nil,
					)),
					pkg.MustPath("/.hakurei", stubArtifact{
						kind:   pkg.KindTar,
						params: []byte("empty directory"),
						cure: func(c *pkg.CureContext) error {
							return os.MkdirAll(c.GetWorkDir().String(), 0700)
						},
					}),
					pkg.MustPath("/opt", testtool),
				), ignorePathname, pkg.MustDecode(
					"GPa4aBakdSJd7Tz7LYj_VJFoojzyZinmVcG3k6M5xI6CZ821J5sXLhLDDuS47gi9",
				), nil},

				{"error passthrough", pkg.NewExec(
					t.Context(),
					msg,
					0,
					check.MustAbs("/work"),
					[]string{"HAKUREI_TEST=1"},
					check.MustAbs("/opt/bin/testtool"),
					[]string{"testtool"},

					pkg.MustPath("/proc/nonexistent", stubArtifact{
						kind:   pkg.KindTar,
						params: []byte("doomed artifact"),
						cure: func(c *pkg.CureContext) error {
							return stub.UniqueError(0xcafe)
						},
					}),
				), nil, pkg.Checksum{}, errors.Join(stub.UniqueError(0xcafe))},
			})

			// check init failure passthrough
			var exitError *exec.ExitError
			if _, _, err := c.Cure(pkg.NewExec(
				t.Context(),
				msg,
				0,
				check.MustAbs("/work"),
				nil,
				check.MustAbs("/opt/bin/testtool"),
				[]string{"testtool"},
			)); !errors.As(err, &exitError) ||
				exitError.ExitCode() != hst.ExitFailure {
				t.Fatalf("Cure: error = %v, want init exit status 1", err)
			}

			// the testtool is not deterministic
			if pathname, checksum, err := c.Cure(testtool); err != nil {
				t.Fatalf("Cure: error = %v", err)
			} else if err = os.Remove(pathname.String()); err != nil {
				t.Fatal(err)
			} else {
				p := base.Append(
					"checksum",
					pkg.Encode(checksum),
				)
				if err = os.Chmod(p.Append("bin").String(), 0700); err != nil {
					t.Fatal(err)
				}
				if err = os.Chmod(p.String(), 0700); err != nil {
					t.Fatal(err)
				}
				if err = os.RemoveAll(p.String()); err != nil {
					t.Fatal(err)
				}
			}
		}, pkg.MustDecode("7PoPpWLjFPXIymbuIYLZAzOpCYr-2PN4CZ11jFdO-mDlnZNgFO3JyOtK8HW8Jxvm")},
	})
}