#!/usr/bin/env python3
"""
Maintenance Page UI Tests
Tests CSV export/import, delete operations, database tools
"""

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

from .test_helpers import BASE_URL, api_get, wait_for_page_load  # noqa: E402


def test_maintenance_page_loads(driver):
    """Test: Maintenance page loads successfully"""
    driver.get(f"{BASE_URL}/maintenance.php")
    wait_for_page_load(driver, timeout=10)
    assert "Maintenance" in driver.page_source, "Page should show Maintenance content"


def test_export_buttons_present(driver):
    """Test: Export buttons are visible"""
    driver.get(f"{BASE_URL}/maintenance.php")
    wait_for_page_load(driver, timeout=10)
    export_btn = driver.find_elements(By.ID, "btnExportCSV")
    assert len(export_btn) > 0, "Export CSV button should be present"


def test_export_csv_button_works(driver):
    """Test: CSV export button triggers download"""
    import os
    import glob

    # Use 127.0.0.1 instead of localhost to avoid IPv6 resolution issues in the browser
    # which can lead to "Failed to fetch" if the server is only listening on IPv4.
    target_url = f"{BASE_URL}/maintenance.php".replace("localhost", "127.0.0.1")
    driver.get(target_url)
    wait_for_page_load(driver, timeout=10)

    # Clear any existing downloads
    download_dir = getattr(driver, 'download_dir', '/tmp/selenium_downloads')
    for f in glob.glob(f"{download_dir}/*.csv"):
        os.remove(f)

    # Ensure the Backup/Restore tab is active so the button is in a clickable state
    try:
        tab = WebDriverWait(driver, 5).until(
            EC.element_to_be_clickable((By.ID, "tab_BackupRestore_id"))
        )
        tab.click()
    except Exception:
        pass

    # Find the export button
    try:
        export_btn = WebDriverWait(driver, 10).until(
            EC.presence_of_element_located((By.ID, "btnExportCSV"))
        )

        # Click it (JavaScript click works even if CSS hides it or if it's overlapped)
        driver.execute_script("arguments[0].click();", export_btn)

        # Wait for download to complete (up to 10 seconds)
        try:
            WebDriverWait(driver, 10).until(
                lambda d: any(os.path.getsize(f) > 0 for f in glob.glob(f"{download_dir}/*.csv"))
            )
            downloaded = True
        except Exception:
            downloaded = False

        if downloaded:
            # Verify CSV file exists and has data
            csv_file = glob.glob(f"{download_dir}/*.csv")[0]
            assert os.path.exists(csv_file), "CSV file should be downloaded"
            assert os.path.getsize(csv_file) > 100, "CSV file should have content"

            # Optional: Verify CSV format
            with open(csv_file, 'r') as f:
                first_line = f.readline()
                assert 'mac' in first_line.lower() or 'device' in first_line.lower(), "CSV should have header"
        else:
            # Download via blob/JavaScript - can't verify file in headless mode
            # Just verify button click didn't cause errors
            assert "error" not in driver.page_source.lower(), "Button click should not cause errors"
    except Exception as e:
        # Check for alerts that might be blocking page_source access
        try:
            alert = driver.switch_to.alert
            alert_text = alert.text
            alert.accept()
            assert False, f"Alert present: {alert_text}"
        except Exception:
            raise e


def test_import_section_present(driver):
    """Test: Import section is rendered or page loads without errors"""
    driver.get(f"{BASE_URL}/maintenance.php")
    wait_for_page_load(driver, timeout=10)
    # Check page loaded and doesn't show fatal errors
    assert "fatal" not in driver.page_source.lower(), "Page should not show fatal errors"
    assert "maintenance" in driver.page_source.lower() or len(driver.page_source) > 100, "Page should load content"


def test_delete_buttons_present(driver):
    """Test: Delete operation buttons are visible (at least some)"""
    driver.get(f"{BASE_URL}/maintenance.php")
    wait_for_page_load(driver, timeout=10)
    buttons = [
        "btnDeleteEmptyMACs",
        "btnDeleteAllDevices",
        "btnDeleteUnknownDevices",
        "btnDeleteEvents",
        "btnDeleteEvents30"
    ]
    found = []
    for btn_id in buttons:
        found.append(len(driver.find_elements(By.ID, btn_id)) > 0)
    # At least 2 buttons should be present (Events buttons are always there)
    assert sum(found) >= 2, f"At least 2 delete buttons should be present, found: {sum(found)}/{len(buttons)}"


def test_csv_export_api(api_token):
    """Test: CSV export endpoint returns data"""
    response = api_get("/devices/export/csv", api_token)
    assert response.status_code == 200, "CSV export API should return 200"
    # Check if response looks like CSV
    content = response.text
    assert "mac" in content.lower() or len(content) > 0, "CSV should contain data"