package tui

import (
	"fmt"
	"os/exec"
	"os/user"
	"path/filepath"
	"strings"
	"time"
)

const networkName = "app-dono_app"

func RunContainer(image string, name string, port int) error {

	cmd := exec.Command(
		"docker", "run",
		"-d",
		"--name", name,
		"-p", fmt.Sprintf("%d:%d", port, port),
		image,
	)

	return cmd.Run()
}

func PullImage(image string) (string, error) {

	cmd := exec.Command("docker", "pull", image)

	out, err := cmd.CombinedOutput()
	return string(out), err
}

func ImageExists(image string) bool {
	cmd := exec.Command("docker", "image", "inspect", image)
	err := cmd.Run()

	return err == nil
}

func PushFileToContainer(container, filePath, destinationPath string) bool {
	dest := fmt.Sprintf("%s:%s", container, destinationPath)

	cmd := exec.Command("docker", "cp", filePath, dest)

	err := cmd.Run()
	return err == nil
}

func EnsureNetwork(name string) error {
	cmd := exec.Command("docker", "network", "inspect", name)
	if err := cmd.Run(); err == nil {
		return nil
	}
	cmd = exec.Command("docker", "network", "create", name)
	out, err := cmd.CombinedOutput()
	if err != nil {
		return fmt.Errorf("erro ao criar network %s: %w\noutput", name, err, string(out))
	}
	return nil
}

func RunWireguardDockerContainer(envFilePath string, cv ConfigValues) error {
	containerName := "vproxy"

	removeExistingContainer(containerName)

	if err := EnsureNetwork(networkName); err != nil {
		return err
	}

	absPath, err := filepath.Abs(envFilePath)
	if err != nil {
		return fmt.Errorf("erro ao resolver caminho absoluto: %w", err)
	}

	args := []string{
		"run", "-it", "-d",
		"--name", containerName,
		"--network", networkName,
		"--restart", "unless-stopped",
		"--cap-add=NET_ADMIN",
		"--device", "/dev/net/tun:/dev/net/tun",
		"--log-opt", "max-size=5m",
		"--log-opt", "max-file=1",
		"--env-file", absPath,
	}
	if cv.Server["seccomp_unconfined"] == "Sim" {
		args = append(args, "--security-opt", "seccomp=unconfined")
	}
	args = append(args, wireguardImageName)
	cmd := exec.Command("docker", args...)

	out, err := cmd.CombinedOutput()
	if err != nil {
		return fmt.Errorf("docker run falhou: %w\noutput: %s", err, string(out))
	}

	time.Sleep(2 * time.Second)
	containerID := strings.TrimSpace(string(out))
	return verifyContainerRunning(containerID)
}

func RunAppClienteContainer(image, containerName, configPath, configDestinationPath string, cv ConfigValues) error {
	removeExistingContainer(containerName)

	if err := EnsureNetwork(networkName); err != nil {
		return err
	}

	absPath, err := filepath.Abs(configPath)
	if err != nil {
		return fmt.Errorf("erro ao resolver caminho absoluto: %w", err)
	}

	currentUser, err := user.Current()
	if err != nil {
		return err
	}
	uidGid := fmt.Sprintf("%s:%s", currentUser.Uid, currentUser.Gid)

	args := []string{
		"run", "-d",
		"-u", uidGid,
		"-p", fmt.Sprintf("%s:8080", cv.Server["port"]),
		"--name", containerName,
		"--network", "app-dono_app",
		"--restart", "unless-stopped",
		"-v", fmt.Sprintf("%s:%s", absPath, configDestinationPath),
		"-v", fmt.Sprintf("%s:/app/certs", cv.Cert["cert_dir_path"]),
	}
	if cv.Server["seccomp_unconfined"] == "Sim" {
		args = append(args, "--security-opt", "seccomp=unconfined")
	}
	args = append(args, image)
	cmd := exec.Command("docker", args...)

	out, err := cmd.CombinedOutput()
	if err != nil {
		return fmt.Errorf("docker run falhou: %w\noutput: %s", err, string(out))
	}

	time.Sleep(2 * time.Second)
	containerID := strings.TrimSpace(string(out))
	return verifyContainerRunning(containerID)
}

func removeExistingContainer(name string) {
	exec.Command("docker", "stop", name).Run()
	exec.Command("docker", "rm", name).Run()
}

func verifyContainerRunning(containerID string) error {
	cmd := exec.Command("docker", "inspect", "--format", "{{.State.Status}}", containerID)
	out, err := cmd.Output()
	if err != nil {
		return fmt.Errorf("erro ao inspecionar container: %w", err)
	}

	status := strings.TrimSpace(string(out))
	if status != "running" {
		logCmd := exec.Command("docker", "logs", "--tail", "20", containerID)
		logs, _ := logCmd.CombinedOutput()
		return fmt.Errorf("container parou com status %q.\nlogs:\n%s", status, string(logs))
	}

	return nil
}