package main

import (
	"encoding/json"
	"os"
	"path/filepath"
	"reflect"
	"strings"
	"testing"
)

// nextcloud-client's shape (novox/hq ADR 0208, ADR 0210, ADR 0182): one official package, no seat,
// the X display on its own machine, no start of its own (the client's own autostart entry is the one
// start), no file of the client's, and the Go bundle serving exactly the listed nextcloud_ tools.

type manifest struct {
	Module        string           `json:"module"`
	Version       string           `json:"version"`
	Capabilities  []string         `json:"capabilities"`
	Requires      []string         `json:"requires"`
	Tools         []string         `json:"tools"`
	Resources     []map[string]any `json:"resources"`
	Claims        []any            `json:"claims"`
	Seats         []any            `json:"seats"`
	Shell         []any            `json:"shell"`
	Contributions []any            `json:"contributions"`
	Environment   any              `json:"environment"`
	Build         struct {
		Artifacts []map[string]any `json:"artifacts"`
	} `json:"build"`
}

func readManifest(t *testing.T) (manifest, string) {
	t.Helper()
	raw, err := os.ReadFile(filepath.Join("..", "..", "module.json"))
	if err != nil {
		t.Fatal(err)
	}
	dec := json.NewDecoder(strings.NewReader(string(raw)))
	dec.DisallowUnknownFields()
	var m manifest
	if err := dec.Decode(&m); err != nil {
		t.Fatalf("module.json: %v", err)
	}
	return m, string(raw)
}

func TestItInstallsTheClientAndNothingElse(t *testing.T) {
	m, _ := readManifest(t)
	if m.Module != "nextcloud-client" || !reflect.DeepEqual(m.Requires, []string{"x11-display"}) ||
		!reflect.DeepEqual(m.Capabilities, []string{"package-manager"}) {
		t.Fatalf("%+v", m)
	}
	if len(m.Resources) != 1 || m.Resources[0]["type"] != "package" || m.Resources[0]["package"] != packageFor {
		t.Fatalf("resources: %v", m.Resources)
	}
	if m.Claims != nil || m.Seats != nil || m.Environment != nil {
		t.Fatal("it holds no seat and sets no environment")
	}
}

func TestItAddsNoSecondStartAndOwnsNoneOfTheClientsFiles(t *testing.T) {
	m, raw := readManifest(t)
	// The client writes its own XDG autostart entry, which the session's dex runs: an xinitrc slot
	// or a window-manager exec would start it twice.
	if m.Shell != nil || m.Contributions != nil {
		t.Fatalf("a second start: shell %v, contributions %v", m.Shell, m.Contributions)
	}
	for _, never := range []string{"nextcloud.cfg", "autostart", "service"} {
		if strings.Contains(raw, never) {
			t.Errorf("module.json names %q: the client's files and start are its own", never)
		}
	}
}

func TestTheToolsAgreeWithTheManifest(t *testing.T) {
	m, raw := readManifest(t)
	served := map[string]bool{}
	for _, tool := range tools() {
		served[tool.Name] = true
		if !strings.HasPrefix(tool.Name, "nextcloud_") || strings.TrimSpace(tool.Description) == "" {
			t.Errorf("%s: prefixed nextcloud_ and described", tool.Name)
		}
	}
	for _, name := range m.Tools {
		if !served[name] {
			t.Errorf("module.json lists %s, which the bundle does not serve", name)
		}
		delete(served, name)
	}
	for name := range served {
		t.Errorf("the bundle serves %s, which module.json does not list", name)
	}
	if len(m.Build.Artifacts) != 1 {
		t.Fatalf("%v", m.Build.Artifacts)
	}
	b := m.Build.Artifacts[0]
	if b["kind"] != "bundle" || b["language"] != "go" || b["system"] != "arch" ||
		b["from"] != "cmd/nextcloud-client-tools" || b["binary"] != "nextcloud-client-tools" {
		t.Errorf("the Go tools bundle: %v", b)
	}
	s := strings.ToLower(raw)
	for _, never := range []string{"/home/", "jochen", "g14", "shanks", "novox.be", "http", "password", "token"} {
		if strings.Contains(s, never) {
			t.Errorf("module.json names %q", never)
		}
	}
}