package e2eutil

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

	"github.com/playwright-community/playwright-go"
	"github.com/stretchr/testify/require"
)

var globalReporter *Reporter

// TestHelper provides utility methods for E2E testing.
type TestHelper struct {
	t              *testing.T
	testName       string
	baseURL        string
	page           playwright.Page
	screenshotNum  int
	screenshotDir  string
}

// NewTestHelper creates a new TestHelper instance.
func NewTestHelper(t *testing.T, testName string, baseURL string, page playwright.Page) *TestHelper {
	t.Helper()

	// Initialize reporter if not already set
	if globalReporter == nil {
		globalReporter = GetReporter()
	}

	// Get screenshot directory
	screenshotDir := filepath.Join("..", "screenshots")

	h := &TestHelper{
		t:             t,
		testName:      testName,
		baseURL:       baseURL,
		page:          page,
		screenshotNum: 1,
		screenshotDir: screenshotDir,
	}

	// Initialize test in reporter
	h.recordResult("Test started", true, nil, "", 0)

	// Automatically mark test as complete when it finishes
	t.Cleanup(func() {
		if globalReporter != nil {
			globalReporter.TestFinished(t)
		}
	})

	return h
}

// recordResult is a helper to record results to the reporter if available
func (h *TestHelper) recordResult(description string, passed bool, err error, screenshotPath string, duration time.Duration) {
	if globalReporter != nil {
		globalReporter.AddResult(h.testName, description, passed, err, screenshotPath, duration)
	}
}

// Navigate navigates to the given path relative to the base URL.
func (h *TestHelper) Navigate(path string) error {
	h.t.Helper()
	url := h.baseURL + path
	h.t.Logf("Navigating to %s", url)
	_, err := h.page.Goto(url)
	return err
}

// Fill fills an input field with the given value.
func (h *TestHelper) Fill(selector, value string) error {
	h.t.Helper()
	h.t.Logf("Filling %s with value", selector)
	return h.page.Fill(selector, value)
}

// Click clicks on an element matching the given selector.
func (h *TestHelper) Click(selector string) error {
	h.t.Helper()
	h.t.Logf("Clicking %s", selector)
	return h.page.Click(selector)
}

// Screenshot captures a screenshot with an auto-incrementing number.
// Returns the path to the saved screenshot.
func (h *TestHelper) Screenshot(name string) string {
	h.t.Helper()

	// Create filename with number prefix
	filename := fmt.Sprintf("%02d-%s.png", h.screenshotNum, name)
	h.screenshotNum++

	// Full path
	fullPath := filepath.Join(h.screenshotDir, filename)

	// Capture screenshot
	_, err := h.page.Screenshot(playwright.PageScreenshotOptions{
		Path: playwright.String(fullPath),
	})
	if err != nil {
		h.t.Logf("Failed to capture screenshot: %v", err)
		return ""
	}

	h.t.Logf("Screenshot saved: %s", fullPath)
	return fullPath
}

// WaitForSelector waits for an element matching the selector to appear.
func (h *TestHelper) WaitForSelector(selector string, timeout time.Duration) error {
	h.t.Helper()
	h.t.Logf("Waiting for selector %s", selector)
	_, err := h.page.WaitForSelector(selector, playwright.PageWaitForSelectorOptions{
		Timeout: playwright.Float(float64(timeout.Milliseconds())),
	})
	return err
}

// AssertTextContains asserts that an element contains the expected text.
func (h *TestHelper) AssertTextContains(selector, expected string) {
	h.t.Helper()
	start := time.Now()

	text, err := h.page.Locator(selector).TextContent()
	if err != nil {
		duration := time.Since(start)
		screenshot := h.Screenshot("assertion-failure-text-content")
		h.recordResult(fmt.Sprintf("Assert text in %s contains %q", selector, expected), false,
			fmt.Errorf("Failed to get text content of %s: %v", selector, err), screenshot, duration)
		require.NoError(h.t, err, "Failed to get text content of %s", selector)
		return
	}

	passed := strings.Contains(text, expected)
	var screenshot string
	var resultErr error

	if !passed {
		resultErr = fmt.Errorf("Element %s should contain text %q, got %q", selector, expected, text)
		screenshot = h.Screenshot("assertion-failure-text-contains")
	}

	duration := time.Since(start)
	h.recordResult(fmt.Sprintf("Assert text in %s contains %q", selector, expected), passed, resultErr, screenshot, duration)
	require.Contains(h.t, text, expected, "Element %s should contain text %q", selector, expected)
}

// AssertURL asserts that the current URL contains the expected string.
func (h *TestHelper) AssertURL(expected string) {
	h.t.Helper()
	start := time.Now()

	url := h.page.URL()
	passed := strings.Contains(url, expected)

	var err error
	var screenshot string

	if !passed {
		err = fmt.Errorf("URL should contain %q, got %q", expected, url)
		screenshot = h.Screenshot("assertion-failure-url")
	}

	duration := time.Since(start)
	h.recordResult(fmt.Sprintf("Assert URL contains %q", expected), passed, err, screenshot, duration)
	require.Contains(h.t, url, expected, "URL should contain %q, got %q", expected, url)
	h.t.Logf("URL contains %q: %s", expected, url)
}

// GetURL returns the current page URL.
func (h *TestHelper) GetURL() string {
	return h.page.URL()
}

// IsVisible checks if an element matching the selector is visible.
func (h *TestHelper) IsVisible(selector string) bool {
	h.t.Helper()
	visible, err := h.page.Locator(selector).IsVisible()
	if err != nil {
		h.t.Logf("Error checking visibility of %s: %v", selector, err)
		return false
	}
	return visible
}

// GetText returns the text content of an element.
func (h *TestHelper) GetText(selector string) (string, error) {
	h.t.Helper()
	return h.page.Locator(selector).TextContent()
}

// AssertNotVisible asserts that an element is not visible.
func (h *TestHelper) AssertNotVisible(selector string, message string) {
	h.t.Helper()
	start := time.Now()

	visible := h.IsVisible(selector)
	passed := !visible

	if message == "" {
		message = fmt.Sprintf("Element %s should not be visible", selector)
	}

	var err error
	var screenshot string

	if !passed {
		err = fmt.Errorf("%s", message)
		screenshot = h.Screenshot("assertion-failure-not-visible")
	}

	duration := time.Since(start)
	h.recordResult(fmt.Sprintf("Assert %s not visible", selector), passed, err, screenshot, duration)
	require.False(h.t, visible, message)
}

// AssertVisible asserts that an element is visible.
func (h *TestHelper) AssertVisible(selector string, message string) {
	h.t.Helper()
	start := time.Now()

	visible := h.IsVisible(selector)
	passed := visible

	if message == "" {
		message = fmt.Sprintf("Element %s should be visible", selector)
	}

	var err error
	var screenshot string

	if !passed {
		err = fmt.Errorf("%s", message)
		screenshot = h.Screenshot("assertion-failure-visible")
	}

	duration := time.Since(start)
	h.recordResult(fmt.Sprintf("Assert %s visible", selector), passed, err, screenshot, duration)
	require.True(h.t, visible, message)
}

// GetCurrentPath returns the path portion of the current URL (without baseURL).
func (h *TestHelper) GetCurrentPath() string {
	h.t.Helper()

	url := h.page.URL()
	// Remove baseURL to get just the path
	path := strings.TrimPrefix(url, h.baseURL)
	return path
}

// LoginAsAdmin logs in as admin user with default credentials.
func (h *TestHelper) LoginAsAdmin() error {
	h.t.Helper()

	// Navigate to login page
	if err := h.Navigate("/login"); err != nil {
		return fmt.Errorf("failed to navigate to login page: %w", err)
	}

	// Wait for login form
	if err := h.WaitForSelector("#email", 5*time.Second); err != nil {
		return fmt.Errorf("email input not found: %w", err)
	}

	// Fill credentials
	if err := h.Fill("#email", "hako@hako.com"); err != nil {
		return fmt.Errorf("failed to fill email: %w", err)
	}

	if err := h.Fill("#password", "hako"); err != nil {
		return fmt.Errorf("failed to fill password: %w", err)
	}

	// Submit form
	if err := h.Click("button[type=\"submit\"]"); err != nil {
		return fmt.Errorf("failed to click submit: %w", err)
	}

	// Wait for redirect to home
	time.Sleep(2 * time.Second)

	h.t.Log("Logged in as admin")
	return nil
}

// Logout logs out the current user.
func (h *TestHelper) Logout() error {
	h.t.Helper()

	// Click logout button (adjust selector based on actual UI)
	if err := h.Click("a[href=\"/logout\"]"); err != nil {
		return fmt.Errorf("failed to click logout: %w", err)
	}

	time.Sleep(1 * time.Second)
	h.t.Log("Logged out")
	return nil
}

// CreateLink creates a new link via the Quick Add form.
func (h *TestHelper) CreateLink(url string) error {
	h.t.Helper()

	// Wait for URL input on home page
	if err := h.WaitForSelector("input[name=\"url\"]", 5*time.Second); err != nil {
		return fmt.Errorf("URL input not found: %w", err)
	}

	// Fill URL
	if err := h.Fill("input[name=\"url\"]", url); err != nil {
		return fmt.Errorf("failed to fill URL: %w", err)
	}

	// Submit form
	if err := h.Click("button[type=\"submit\"]"); err != nil {
		return fmt.Errorf("failed to submit form: %w", err)
	}

	// Wait for redirect to /links page
	start := time.Now()
	for time.Since(start) < 5*time.Second {
		currentURL := h.GetURL()
		if strings.Contains(currentURL, "/links") {
			h.t.Logf("Successfully redirected to links page")
			break
		}
		time.Sleep(500 * time.Millisecond)
	}

	h.t.Logf("Created link: %s", url)
	return nil
}

// SearchLinks performs a search for links.
func (h *TestHelper) SearchLinks(query string) error {
	h.t.Helper()

	// Wait for search input
	if err := h.WaitForSelector("input[name=\"search\"]", 5*time.Second); err != nil {
		return fmt.Errorf("search input not found: %w", err)
	}

	// Fill search query
	if err := h.Fill("input[name=\"search\"]", query); err != nil {
		return fmt.Errorf("failed to fill search query: %w", err)
	}

	// Submit search (might be automatic or require button click)
	time.Sleep(1 * time.Second)

	h.t.Logf("Searched for: %s", query)
	return nil
}

// WaitForText waits for an element to contain specific text.
func (h *TestHelper) WaitForText(selector, text string, timeout time.Duration) error {
	h.t.Helper()

	start := time.Now()
	for time.Since(start) < timeout {
		content, err := h.GetText(selector)
		if err == nil && strings.Contains(content, text) {
			return nil
		}
		time.Sleep(500 * time.Millisecond)
	}

	return fmt.Errorf("timeout waiting for text %q in selector %s", text, selector)
}

// WaitForElementCount waits for a specific number of elements matching the selector.
func (h *TestHelper) WaitForElementCount(selector string, count int, timeout time.Duration) error {
	h.t.Helper()

	start := time.Now()
	for time.Since(start) < timeout {
		elements, err := h.page.Locator(selector).All()
		if err == nil && len(elements) == count {
			return nil
		}
		time.Sleep(500 * time.Millisecond)
	}

	return fmt.Errorf("timeout waiting for %d elements matching %s", count, selector)
}

// SelectDropdown selects an option from a dropdown.
func (h *TestHelper) SelectDropdown(selector, value string) error {
	h.t.Helper()

	h.t.Logf("Selecting %s from dropdown %s", value, selector)
	_, err := h.page.SelectOption(selector, playwright.SelectOptionValues{Values: &[]string{value}})
	return err
}

// WaitForArchiveComplete waits for an archive to complete processing.
func (h *TestHelper) WaitForArchiveComplete(timeout time.Duration) error {
	h.t.Helper()

	// Wait for status indicator to show "completed" or similar
	// This is a generic implementation - adjust based on actual UI
	return h.WaitForText(".archive-status", "completed", timeout)
}

// GetArchiveStatus returns the current archive status.
func (h *TestHelper) GetArchiveStatus() (string, error) {
	h.t.Helper()

	return h.GetText(".archive-status")
}

// FillForm fills multiple form fields at once.
func (h *TestHelper) FillForm(fields map[string]string) error {
	h.t.Helper()

	for selector, value := range fields {
		if err := h.Fill(selector, value); err != nil {
			return fmt.Errorf("failed to fill %s: %w", selector, err)
		}
	}

	return nil
}

// GetElementCount returns the number of elements matching the selector.
func (h *TestHelper) GetElementCount(selector string) (int, error) {
	h.t.Helper()

	elements, err := h.page.Locator(selector).All()
	if err != nil {
		return 0, err
	}
	return len(elements), nil
}

// WaitForPath waits for the current path to contain the expected path.
func (h *TestHelper) WaitForPath(expectedPath string, timeout time.Duration) error {
	h.t.Helper()
	start := time.Now()
	for time.Since(start) < timeout {
		currentPath := h.GetCurrentPath()
		if strings.Contains(currentPath, expectedPath) {
			return nil
		}
		time.Sleep(100 * time.Millisecond)
	}
	return fmt.Errorf("timeout waiting for path containing %q", expectedPath)
}