package main

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func TestTheManifestDeclaresNothingTheHostCouldNotInstall(t *testing.T) {
	m := readManifest(t)
	holdsTheBundle(t, m, "snapd")
	// snapd is not in the official repositories: no package, and no unit that only that package
	// brings, until the mesh's package repository builds it (research 027 question 1).
	if len(m.Resources) != 0 {
		t.Errorf("resources %v", m.Resources)
	}
}

const listAll = `Name               Version                     Rev    Tracking       Publisher    Notes
bare               1.0                         5      latest/stable  canonical**  base
code               04c0d99f                    266    latest/stable  vscode**     disabled,classic
code               07f806f9                    267    latest/stable  vscode**     classic
gtk-common-themes  0.1-81-g442e511             1535   latest/stable  canonical**  -
`

func TestListReadsEachRevisionAndMarksTheDisabledOnes(t *testing.T) {
	f := using(t, func(string, Cmd) Result { return ok(listAll) })
	got, err := List()
	if err != nil || len(got.Snaps) != 4 || got.Disabled != 1 || got.Active != 3 {
		t.Fatalf("%+v %v", got, err)
	}
	if s := got.Snaps[1]; s.Name != "code" || s.Revision != "266" || !s.Disabled || s.Publisher != "vscode" || strings.Join(s.Notes, ",") != "disabled,classic" {
		t.Errorf("%+v", s)
	}
	if s := got.Snaps[3]; len(s.Notes) != 0 || s.Disabled {
		t.Errorf("%+v", s)
	}
	if f.lines()[0] != "snap list --all --unicode=never --color=never" {
		t.Errorf("%v", f.lines())
	}
}

func TestToolsSayWhenSnapdIsNotInstalled(t *testing.T) {
	using(t, func(string, Cmd) Result { return Result{Status: 127, Error: "not-found"} })
	if _, err := List(); err == nil || !strings.Contains(err.Error(), "not in the official repositories") {
		t.Fatalf("%v", err)
	}
	got, err := Status()
	if err != nil || got.Installed || !strings.Contains(strings.Join(got.Findings, ";"), "not installed") {
		t.Fatalf("%+v %v", got, err)
	}
}

func TestStatusNamesWhatIsWrongWithTheInstallation(t *testing.T) {
	dir := t.TempDir()
	wasLSM, wasRoot := lsmFile, snapRoot
	lsmFile, snapRoot = filepath.Join(dir, "lsm"), filepath.Join(dir, "snap")
	defer func() { lsmFile, snapRoot = wasLSM, wasRoot }()
	_ = os.WriteFile(lsmFile, []byte("capability,landlock,lockdown,yama,bpf\n"), 0o644)
	_ = os.Mkdir(snapRoot, 0o755)
	using(t, func(line string, c Cmd) Result {
		switch {
		case line == "snap version":
			return ok("snap    2.76.2-2\nsnapd   2.76.2-2\nseries  16\n")
		case strings.HasSuffix(line, "is-enabled snapd.service"), strings.HasSuffix(line, "is-enabled apparmor.service"):
			return Result{Status: 1, Stdout: "disabled\n"}
		case strings.Contains(line, "is-enabled"):
			return ok("enabled\n")
		case strings.Contains(line, "is-active snapd.service"):
			return ok("active\n")
		}
		return Result{Status: 3, Stdout: "inactive\n"}
	})
	got, err := Status()
	if err != nil || !got.Installed || got.Version != "2.76.2-2" || got.AppArmor || !got.ClassicRoot || len(got.Units) != 4 {
		t.Fatalf("%+v %v", got, err)
	}
	if got.Units[1].Enabled != "disabled" || got.Units[1].Active != "active" {
		t.Errorf("socket-activated service: %+v", got.Units[1])
	}
	all := strings.Join(got.Findings, ";")
	if !strings.Contains(all, "without their confinement") || !strings.Contains(all, "nothing enforces") || strings.Contains(all, "/snap does not exist") {
		t.Errorf("%s", all)
	}
}

func TestInfoReadsFieldsCommandsAndChannels(t *testing.T) {
	using(t, func(string, Cmd) Result {
		return ok(`name:      code
summary:   Code editing. Redefined.
publisher: Visual Studio Code (vscode**)
license:   unset
description: |
  Visual Studio Code is a new choice
  of tool.
commands:
  - code
  - code.url-handler
tracking:     latest/stable
channels:
  latest/stable:    07f806f9 2026-09-30 (267) 543MB classic
  latest/candidate: ^
`)
	})
	got, err := Info("code")
	if err != nil || got.Fields["summary"] != "Code editing. Redefined." || len(got.Commands) != 2 || got.Fields["tracking"] != "latest/stable" {
		t.Fatalf("%+v %v", got, err)
	}
	if got.Channels["latest/stable"] != "07f806f9 2026-09-30 (267) 543MB classic" || got.Fields["description"] != "Visual Studio Code is a new choice of tool." {
		t.Errorf("%+v", got)
	}
}

func TestUpdatesAndChangesReadNothingToDoAsEmpty(t *testing.T) {
	using(t, func(line string, c Cmd) Result {
		if strings.Contains(line, "refresh --list") {
			return Result{Stderr: "All snaps up to date.\n"}
		}
		return Result{Status: 1, Stderr: "error: no changes found\n"}
	})
	u, err := Updates()
	if err != nil || u["count"] != 0 {
		t.Fatalf("%v %v", u, err)
	}
	c, err := Changes("")
	if err != nil || len(c["changes"].([]Change)) != 0 {
		t.Fatalf("%v %v", c, err)
	}
	if _, err := Changes("12; reboot"); err == nil {
		t.Error("a change id that is not a number")
	}
}

func TestChangesAndTasksAreReadByColumn(t *testing.T) {
	using(t, func(line string, c Cmd) Result {
		if strings.Contains(line, "tasks") {
			return ok("Status  Spawn                      Ready                      Summary\nDone    2026-10-01T18:57:00+02:00  2026-10-01T18:57:10+02:00  Download snap \"code\" (267)\n")
		}
		return ok("ID   Status  Spawn                      Ready  Summary\n42   Doing   2026-10-04T10:00:00+02:00  -      Install \"hello\" snap\n")
	})
	c, err := Changes("")
	ch := c["changes"].([]Change)
	if err != nil || len(ch) != 1 || ch[0].ID != "42" || ch[0].Ready != "" || ch[0].Summary != `Install "hello" snap` {
		t.Fatalf("%+v %v", c, err)
	}
	c, _ = Changes("42")
	if tasks := c["tasks"].([]Change); len(tasks) != 1 || tasks[0].Status != "Done" || tasks[0].Summary != `Download snap "code" (267)` {
		t.Errorf("%+v", c)
	}
}

func TestActsGoThroughSudoWithoutWaitingAndAnswerTheChange(t *testing.T) {
	f := using(t, func(line string, c Cmd) Result {
		if strings.Contains(line, "refresh") {
			return Result{Stderr: "All snaps up to date.\n"}
		}
		return ok("57\n")
	})
	got, err := Install("hello-world", "latest/edge", true)
	if err != nil || got.Change != "57" || !strings.Contains(got.Follow, "57") {
		t.Fatalf("%+v %v", got, err)
	}
	if _, err := Remove("hello-world", true); err != nil {
		t.Fatal(err)
	}
	r, err := Refresh("")
	if err != nil || r.Change != "" || !strings.Contains(r.Said, "up to date") {
		t.Fatalf("%+v %v", r, err)
	}
	want := "sudo -n snap install --no-wait --channel=latest/edge --classic hello-world\n" +
		"sudo -n snap remove --no-wait --purge hello-world\n" +
		"sudo -n snap refresh --no-wait"
	if got := strings.Join(f.lines(), "\n"); got != want {
		t.Errorf("asked\n%s", got)
	}
	for _, bad := range []string{"--classic", "Hello", "a b", "../x"} {
		if err := checkSnapName(bad); err == nil {
			t.Errorf("%q accepted as a snap name", bad)
		}
	}
	if _, err := Install("x", "--dangerous", false); err == nil {
		t.Error("an option as a channel")
	}
}

func TestDiskUsageMeasuresEachRevisionAndWhatDisabledOnesTake(t *testing.T) {
	dir := t.TempDir()
	was := snapsDir
	snapsDir = dir
	defer func() { snapsDir = was }()
	for name, size := range map[string]int{"code_266.snap": 500, "code_267.snap": 510, "bare_5.snap": 4} {
		_ = os.WriteFile(filepath.Join(dir, name), make([]byte, size), 0o600)
	}
	using(t, func(string, Cmd) Result { return ok(listAll) })
	got, err := DiskUsage()
	if err != nil || got.TotalBytes != 1014 || got.Reclaimable != 500 || len(got.Snaps) != 2 {
		t.Fatalf("%+v %v", got, err)
	}
	if c := got.Snaps[0]; c.Name != "code" || c.Bytes != 1010 || !c.Revisions[0].Disabled || c.Revisions[1].Disabled {
		t.Errorf("%+v", c)
	}
}