package main

import (
	"crypto/md5"
	"fmt"
	"io"
	"os"
	"os/exec"
	"testing"
)

func must[T any](t T, err error) T {
	if err != nil {
		panic(err)
	}
	return t
}

func build() func() {
	must(exec.Command("go", "build", "-o", "testdata/app", "testdata/app.go").CombinedOutput())
	must(exec.Command("go", "build", "-o", "appify").CombinedOutput())
	return func() {
		os.RemoveAll("./appify")
		os.RemoveAll("./testdata/app")
	}
}

func Test(t *testing.T) {
	cleanup := build()
	defer cleanup()

	out := must(exec.Command("./appify",
		"-name", "Test",
		"-icon", "testdata/machina-square.png",
		"testdata/app").CombinedOutput())
	t.Logf("%q", string(out))
	defer os.RemoveAll("Test.app")

	actualAppHash := filehash("testdata/app")
	type file struct {
		path string
		perm string
		hash string
	}
	for _, f := range []file{
		{path: "Test.app", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents/MacOS", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents/MacOS/Test.app", perm: "-rwxr-xr-x", hash: actualAppHash},
		{path: "Test.app/Contents/Info.plist", perm: "-rw-r--r--", hash: "0cd092b7b884e87617648dbdadb6a804"},
		{path: "Test.app/Contents/Resources", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents/Resources/icon.icns", perm: "-rw-r--r--", hash: "23bdc36475094ed8886f319811d3a182"},
	} {
		t.Run(f.path, func(t *testing.T) {
			info := must(os.Stat(f.path))
			if info.Mode().String() != f.perm {
				t.Logf("%v != %v", info.Mode().String(), f.perm)
			}
			if f.hash != "" {
				actual := filehash(f.path)
				if actual != f.hash {
					t.Logf("%v != %v", actual, f.hash)
				}
			}
		})
	}
}

func TestWithPListInjection(t *testing.T) {
	cleanup := build()
	defer cleanup()

	out := must(exec.Command("./appify",
		"-name", "Test",
		"-icon", "testdata/machina-square.png",
		"-plist", "testdata/additionalplist.xml",
		"testdata/app").CombinedOutput())
	t.Logf("%q", string(out))
	defer os.RemoveAll("Test.app")

	actualAppHash := filehash("testdata/app")
	type file struct {
		path string
		perm string
		hash string
	}
	for _, f := range []file{
		{path: "Test.app", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents/MacOS", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents/MacOS/Test.app", perm: "-rwxr-xr-x", hash: actualAppHash},
		{path: "Test.app/Contents/Info.plist", perm: "-rw-r--r--", hash: "dd977257c7e77dc7739bb4ae70e5f697"},
		{path: "Test.app/Contents/Resources", perm: "drwxr-xr-x"},
		{path: "Test.app/Contents/Resources/icon.icns", perm: "-rw-r--r--", hash: "23bdc36475094ed8886f319811d3a182"},
	} {
		t.Run(f.path, func(t *testing.T) {
			info := must(os.Stat(f.path))
			if info.Mode().String() != f.perm {
				t.Logf("%v != %v", info.Mode().String(), f.perm)
			}
			if f.hash != "" {
				actual := filehash(f.path)
				if actual != f.hash {
					t.Logf("%v != %v", actual, f.hash)
				}
			}
		})
	}
}

// filehash gets an md5 hash of the file at path.
func filehash(path string) string {
	f := must(os.Open(path))
	defer f.Close()
	h := md5.New()
	must(io.Copy(h, f))
	return fmt.Sprintf("%x", h.Sum(nil))
}