package encrypt

import (
	"io/fs"
	"os"
	"testing"

	"git.burning.moe/celediel/agedit/pkg/tmpfile"
)

var generator = tmpfile.NewGenerator("test_", ".txt", 18)

// TestEncryptionDecryption writes a string to a file, encrypts it, then decrypts it, and reads the string.
func TestEncryptionDecryption(t *testing.T) {
	var (
		strings_to_write = []string{
			"hello world",
			"hola mundo",
			"مرحبا بالعالم",
			"こんにちは世界",
			"你好世界",
			"Γειά σου Κόσμε",
			"Привіт Світ",
			"Բարեւ աշխարհ",
			"გამარჯობა მსოფლიო",
			"अभिवादन पृथ्वी",
		}
	)

	id, err := NewIdentity()
	if err != nil {
		t.Fatal(err)
	}

	for _, str := range strings_to_write {
		var (
			outname           string = generator.GenerateFullPath()
			encrypted_outname string = outname + ".age"
			b                 []byte
			err               error
		)

		t.Run("testing writing "+str, func(t *testing.T) {
			if err = os.WriteFile(outname, []byte(str), fs.FileMode(0600)); err != nil {
				t.Fatal(err)
			}

			if b, err = os.ReadFile(outname); err != nil {
				t.Fatal(err)
			}

			if err = Encrypt(b, encrypted_outname, id); err != nil {
				t.Fatal(err)
			}

			if b, err = Decrypt(encrypted_outname, id); err != nil {
				t.Fatal(err)
			}

			if string(b) != str {
				t.Fatal(string(b) + " isn't the same as " + str)
			}

			if err = os.Remove(outname); err != nil {
				t.Fatal(err)
			}

			if err = os.Remove(encrypted_outname); err != nil {
				t.Fatal(err)
			}

		})
	}
}

// TestNewIdentity creats a new identity, writes it to file, then re-reads it back from the file.
func TestNewIdentity(t *testing.T) {
	for range 1000 {
		outfile := generator.GenerateFullPath()

		identity, err := NewIdentity()
		if err != nil {
			t.Fatal(err)
		}

		err = WriteIdentityToFile(identity, outfile)
		if err != nil {
			t.Fatal(err)
		}

		other_identity, err := ReadIdentityFromFile(outfile)
		if err != nil {
			t.Fatal(err)
		}

		if identity.Recipient().String() != other_identity.Recipient().String() && identity.String() != other_identity.String() {
			t.Fatal("Identities don't match!", identity.Recipient(), "!=", identity.Recipient())
		}
		os.Remove(outfile)
	}
}