package e2eutil

import (
	"context"
	"fmt"
	"path/filepath"
	"testing"
	"time"

	"github.com/testcontainers/testcontainers-go"
	"github.com/testcontainers/testcontainers-go/wait"
)

// StartTestWebServer starts an nginx container with test content for E2E testing.
// The container is attached to the shared network with the testServerAlias hostname,
// and the returned URL uses that alias so the Hako container can fetch from it.
func StartTestWebServer(ctx context.Context, t *testing.T) (testcontainers.Container, string, error) {
	t.Helper()

	// Get the project root (one level up from e2e)
	projectRoot, err := filepath.Abs(filepath.Join("..", ".."))
	if err != nil {
		return nil, "", fmt.Errorf("failed to get project root: %w", err)
	}

	// Ensure shared network exists so Hako can reach this server by alias.
	nw, err := getSharedNetwork(ctx)
	if err != nil {
		return nil, "", err
	}

	// Create container request attached to the shared network.
	req := testcontainers.ContainerRequest{
		FromDockerfile: testcontainers.FromDockerfile{
			Context:       filepath.Join(projectRoot, "e2e", "testserver"),
			Dockerfile:    "Dockerfile",
			PrintBuildLog: false,
		},
		ExposedPorts: []string{"80/tcp"},
		WaitingFor:   wait.ForHTTP("/").WithStartupTimeout(10 * time.Second),
		Networks:     []string{nw.Name},
		NetworkAliases: map[string][]string{
			nw.Name: {testServerAlias},
		},
	}

	// Start container
	t.Log("Starting test web server container...")
	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
		ContainerRequest: req,
		Started:          true,
	})
	if err != nil {
		return nil, "", fmt.Errorf("failed to start test web server container: %w", err)
	}

	// Register cleanup
	t.Cleanup(func() {
		if err := container.Terminate(ctx); err != nil {
			t.Logf("Failed to terminate test web server container: %v", err)
		}
	})

	// Use the network alias as the base URL so Hako can reach this server
	// from inside its container via Docker DNS.
	baseURL := fmt.Sprintf("http://%s", testServerAlias)
	t.Logf("Test web server started at %s (network alias)", baseURL)

	return container, baseURL, nil
}