# ---------------------------------------------------------------------------------
# IMPORTS: Importing necessary modules from the Selenium and standard Python libraries
# ---------------------------------------------------------------------------------
from selenium import webdriver
from selenium.webdriver.chrome.service import Service
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
import time
from selenium.webdriver.support.ui import Select
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.action_chains import ActionChains

# ---------------------------------------------------------------------------------
# INITIALIZATION FUNCTIONS (Corrected function and variable names)
# ---------------------------------------------------------------------------------

# initialize_service: Sets up the Chrome driver service.
def initialize_service():
    # Corrected variable name: executable_path
    executable_path = r"C:\Users\karan\Downloads\chromedriver-win64\chromedriver.exe"
    # Creates a Service object for the Chrome browser.
    service = Service(executable_path=executable_path)
    return service

# open_website: Opens the specified URL and maximizes the window.
def open_website(driver):
    # Corrected variable name: url. Removed '#' from the end of the URL.
    url = r"file:///C:/Users/karan/Desktop/selenium_test_page.html"
    # Navigates the browser to the local HTML file.
    driver.get(url)
    # Corrected method name: maximize_window()
    driver.maximize_window()
    # Pauses execution for 2 seconds to allow the page to fully load.
    time.sleep(2)

# ---------------------------------------------------------------------------------
# TASK FUNCTIONS (Web Interactions) - Using IDs for stability
# ---------------------------------------------------------------------------------

def task1(driver):
    print("Executing Task 1: Basic Inputs...")
    # Click on the Radio Button "Option B"
    driver.find_element(By.XPATH, "/html/body/div/div/section[1]/div/div[1]/div/div[2]/label[2]/input").click()
    time.sleep(1)

    # Click on the Checkbox
    driver.find_element(By.ID, "myCheckbox").click()
    time.sleep(1)

    # Select "Option 2" from the Standard Dropdown
    dropdown_element = driver.find_element(By.ID, "basic-dropdown")
    select = Select(dropdown_element)
    select.select_by_visible_text("Option 2")
    time.sleep(1)

def task2(driver):
    print("Executing Task 2: Delayed Alert Simulation...")
    # Click to trigger the custom alert modal
    driver.find_element(By.ID, "alert-trigger-btn").click()

    # Wait for the custom alert modal to become visible
    wait = WebDriverWait(driver, 10)
    wait.until(EC.visibility_of_element_located((By.ID, "custom-alert-modal")))

    # Input text into the alert's input field (simulating send_keys)
    alert_input_element = driver.find_element(By.ID, "alert-input")
    alert_input_element.clear()
    alert_input_element.send_keys("Welcome to Selenium")
    time.sleep(2)

    # Accept the alert (simulates clicking 'OK')
    driver.find_element(By.XPATH, "//button[text()='OK']").click()
    time.sleep(2)

def task3(driver):
    print("Executing Task 3: Multi-step Dropdown and Hover...")
    # Click on "Redirect link page" to switch to the Task 3 section
    driver.find_element(By.ID, "redirect-link-page").click()
    time.sleep(1)

    # Click on "Redirect to Country info page" (stays on the same section for this test page)
    driver.find_element(By.ID, "redirect-country-link").click()
    time.sleep(1)

    # Select value "15" from the dropdown
    dropdown_driver = driver.find_element(By.ID, "value-dropdown")
    select = Select(dropdown_driver)
    select.select_by_value("15")
    time.sleep(1)

    # Hover over the element to reveal the hidden option
    hover_div_element = driver.find_element(By.ID, "hover-div")
    actions = ActionChains(driver)
    actions.move_to_element(hover_div_element).perform()
    time.sleep(1)

    # Select the revealed option by value
    hidden_select = driver.find_element(By.ID, "hidden-option-select")
    select_revealed = Select(hidden_select)
    select_revealed.select_by_value("revealed")
    time.sleep(1)

def task4(driver):
    print("Executing Task 4: File Upload...")
    # Click to navigate to the File Upload section
    driver.find_element(By.ID, "file-upload-link").click()
    time.sleep(2)

    # Finds the file input element by its ID.
    file_input_element = driver.find_element(By.ID, "uploadFile")

    # IMPORTANT: The file must exist at this path for send_keys to work.
    filepath_to_upload = r"C:\Users\karan\Desktop\selenium_test_page.html"

    # Sends the file path to the input element (performs the upload)
    file_input_element.send_keys(filepath_to_upload)
    time.sleep(2)

def task5(driver):
    print("Executing Task 5: Drag and Drop...")
    # Click to navigate to the Drag and Drop section
    driver.find_element(By.ID, "drag-drop-link").click()
    time.sleep(2)

    # Find the source element
    source_driver = driver.find_element(By.ID, "dragFrom")
    # Find the target drop zone element
    target_driver = driver.find_element(By.ID, "dropZone")

    # Performs the drag and drop action.
    actions = ActionChains(driver)
    actions.drag_and_drop(source_driver, target_driver).perform()
    time.sleep(2)

# ---------------------------------------------------------------------------------
# MAIN EXECUTION (Centralized control flow)
# ---------------------------------------------------------------------------------

def main():
    driver = None
    try:
        print("Starting Selenium Automation Script...")
        # 1. Initialize the Chrome WebDriver service.
        service = initialize_service()
        # 2. Create the WebDriver instance.
        driver = webdriver.Chrome(service=service)

        # 3. Open the web page and maximize the window.
        open_website(driver)

        # 4. Execute the tasks sequentially.
        task1(driver)
        task2(driver)
        task3(driver)
        task4(driver)
        task5(driver)

        print("Automation tasks completed successfully.")

    except Exception as e:
        print(f"\n--- EXECUTION FAILED ---")
        print(f"An error occurred: {e}")
        print("\nPlease check the following common issues:")
        print("1. Your Chrome browser version matches your 'chromedriver.exe' version.")
        print("2. The path to 'chromedriver.exe' is exactly correct.")
        print("3. The path to 'selenium_test_page.html' is exactly correct.")
    finally:
        # 5. Closes the browser window safely.
        if driver:
            print("Quitting driver.")
            driver.quit()

if __name__ == "__main__":
    main()