package tests

import (
	"concord.hectabit.org/Hectabit/burgerbackup/lib/common"
	"golang.org/x/crypto/argon2"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestAES(t *testing.T) {
	t.Logf("[INFO] Running test: encryption and decryption\n")

	cryptoKeyHashed := argon2.IDKey([]byte("supersecretkey"), []byte("burgerbackup"), 1, 64*1024, 4, 32)
	encryptedContent, err := common.EncryptAES(cryptoKeyHashed, []byte("This is a test file for burgerbackup"))
	if err != nil {
		t.Fatalf("[FATAL] Error encrypting content: " + err.Error() + "\n")
	}

	decryptedContent, err := common.DecryptAES(cryptoKeyHashed, encryptedContent)
	if err != nil {
		t.Fatalf("[FATAL] Error decrypting content: " + err.Error() + "\n")
	}

	if string(decryptedContent) != "This is a test file for burgerbackup" {
		t.Logf(string(decryptedContent) + "\n")
		t.Fatalf("[FATAL] Decrypted content does not match original content\n")
	}

	t.Logf("[INFO] Test encryption and decryption successful: " + string(decryptedContent) + "\n")
}

func TestBld(t *testing.T) {
	t.Logf("[INFO] Running test: package build\n")

	goList := exec.Command("go", "list", "-m", "-f", "\"{{.Dir}}\"")
	directoryBytes, err := goList.Output()
	if err != nil {
		t.Fatalf("[FATAL] Error running go list: " + err.Error() + "\n")
	}
	directory := strings.TrimSuffix(strings.TrimPrefix(string(directoryBytes), "\""), "\"\n")
	t.Logf("[INFO] Located go.mod at: " + directory + "\n")
	err = os.RemoveAll("/tmp/burgerbackup")
	if err != nil {
		t.Fatalf("[FATAL] Error removing old build directory: " + err.Error() + "\n")
	}

	output, err := exec.Command("make", "-C", directory, "BUILDDIR=/tmp/burgerbackup").Output()
	if err != nil {
		t.Logf("[FATAL] Error building the package: " + err.Error() + "\n")
		t.Fatalf("[INFO] Make output: " + string(output) + "\n")
	}

	t.Logf("[INFO] Test package build successful\n")
}

func TestBbk(t *testing.T) {
	var processes []*exec.Cmd
	done := make(chan bool)
	t.Logf("[INFO] Starting requisites for test: server and client backup\n")

	serverIni := "[config]\nPORT = 8080\nHOST = 127.0.0.1\nBACKUP_FOLDER = /tmp/burgerbackup/\nBACKUP_KEY = supersecretkey\nCRYPTO_KEY = supersecretkey"
	err := os.WriteFile("/tmp/burgerbackup/server.ini", []byte(serverIni), 0644)
	if err != nil {
		t.Fatalf("[FATAL] Error writing server.ini: " + err.Error() + "\n")
	}

	clientIni := "[config]\nFILE_LOCATION = /tmp/burgerbackup/testfile.txt\nREMOTE_URL = http://127.0.0.1:8080/api/backup\nBACKUP_KEY = supersecretkey\nCRYPTO_KEY = supersecretkey\nBACKUP_INTERVAL = 1"
	err = os.WriteFile("/tmp/burgerbackup/client.ini", []byte(clientIni), 0644)
	if err != nil {
		t.Fatalf("[FATAL] Error writing client.ini: " + err.Error() + "\n")
	}

	testFile := "This is a test file for burgerbackup"
	err = os.WriteFile("/tmp/burgerbackup/testfile.txt", []byte(testFile), 0644)
	if err != nil {
		t.Fatalf("[FATAL] Error writing testfile: " + err.Error() + "\n")
	}

	t.Logf("[INFO] Requisites for test: server and client backup have finished\n")
	t.Logf("[INFO] Running test: server and client backup\n")

	go func() {
		cmd := exec.Command("/tmp/burgerbackup/bin/server", "/tmp/burgerbackup/server.ini")
		processes = append(processes, cmd)
		err := cmd.Start()
		if err != nil {
			t.Fatalf("[FATAL] Error running server: " + err.Error() + "\n")
		}
	}()

	go func() {
		cmd := exec.Command("/tmp/burgerbackup/bin/client", "/tmp/burgerbackup/server.ini")
		processes = append(processes, cmd)
		err := cmd.Start()
		if err != nil {
			t.Fatalf("[FATAL] Error running client: " + err.Error() + "\n")
		}
	}()

	go func() {
		time.Sleep(2 * 1000000000)
		for _, process := range processes {
			err := process.Process.Kill()
			if err != nil {
				t.Fatalf("[FATAL] Error killing process: " + err.Error() + "\n")
			}
		}
		t.Logf("[INFO] Server and client killed\n")
		matches, err := filepath.Glob("/tmp/burgerbackup/testfile_*.txt")
		if err != nil {
			t.Fatalf("[FATAL] Error globbing testfiles: " + err.Error() + "\n")
		}
		if len(matches) > 0 {
			matchesString := ""
			for _, match := range matches {
				matchesString += match + ","
			}
			t.Logf("[INFO] Testfiles found: " + matchesString + "\n")
			t.Logf("[INFO] Test server and client backup successful\n")
			done <- true
		} else {
			t.Fatalf("[FATAL] No testfiles found" + "\n")
		}
	}()

	finished := <-done
	if finished {
		return
	} else {
		t.Fatalf("[FATAL] Bit flip detected, please do not expose to cosmic radiation (impossible condition detected)\n")
	}
}

func Cleanup(t *testing.T) {
	t.Logf("[INFO] Tests completed successfully, cleaning up...\n")
	err := os.RemoveAll("/tmp/burgerbackup")
	if err != nil {
		t.Fatalf("[FATAL] Error cleaning up: " + err.Error() + "\n")
	}
	t.Logf("[INFO] Cleanup successful. Exiting...\n")
}