"""End-to-end tests for the Video Analyzer application using Playwright."""

from __future__ import annotations

import subprocess
import time
from typing import Generator

import pytest
from playwright.sync_api import Page, expect


@pytest.fixture(scope="module")
def app_url() -> Generator[str, None, None]:
    """Start the Gradio app and return its URL."""
    # Start the app in background
    process = subprocess.Popen(
        ["python", "app.py"],
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
    )

    # Wait for app to start
    time.sleep(10)

    yield "http://127.0.0.1:7860"

    # Cleanup
    process.terminate()
    process.wait()


class TestUnifiedChatbotUI:
    """E2E tests for the unified chatbot Video Analyzer UI."""

    def test_homepage_loads(self, page: Page, app_url: str):
        """Test that the homepage loads correctly."""
        page.goto(app_url)

        # Check title is visible
        expect(page.locator("text=Video Analyzer")).to_be_visible()

    def test_app_subtitle_visible(self, page: Page, app_url: str):
        """Test that the app subtitle is visible."""
        page.goto(app_url)

        # Check subtitle
        expect(page.locator("text=Analyze YouTube videos")).to_be_visible()

    def test_login_button_visible(self, page: Page, app_url: str):
        """Test that the login button is visible."""
        page.goto(app_url)

        # Look for login button (HuggingFace sign in)
        login_button = page.locator("button:has-text('Sign in')")
        expect(login_button).to_be_visible()

    def test_chatbot_visible(self, page: Page, app_url: str):
        """Test that the chatbot component is visible."""
        page.goto(app_url)

        # Check for chatbot container
        chatbot = page.locator("[data-testid='chatbot']")
        expect(chatbot).to_be_visible()

    def test_welcome_message_displayed(self, page: Page, app_url: str):
        """Test that welcome message is shown on load."""
        page.goto(app_url)

        # Wait for page to load
        page.wait_for_timeout(2000)

        # Check for welcome message content
        expect(page.locator("text=Welcome to Video Analyzer")).to_be_visible()

    def test_message_input_exists(self, page: Page, app_url: str):
        """Test that the message input field exists."""
        page.goto(app_url)

        # Check for text input with placeholder
        msg_input = page.locator("textarea[placeholder*='YouTube URL']")
        expect(msg_input).to_be_visible()

    def test_send_button_exists(self, page: Page, app_url: str):
        """Test that the Send button exists."""
        page.goto(app_url)

        # Check for Send button
        send_btn = page.locator("button:has-text('Send')")
        expect(send_btn).to_be_visible()

    def test_clear_chat_button_exists(self, page: Page, app_url: str):
        """Test that the Clear Chat button exists."""
        page.goto(app_url)

        # Check for Clear Chat button
        clear_btn = page.locator("button:has-text('Clear Chat')")
        expect(clear_btn).to_be_visible()

    def test_knowledge_base_status_visible(self, page: Page, app_url: str):
        """Test that knowledge base status is displayed."""
        page.goto(app_url)

        # Wait for status to load
        page.wait_for_timeout(2000)

        # Check for knowledge base empty message
        expect(page.locator("text=Knowledge base is empty")).to_be_visible()

    def test_can_type_in_message_input(self, page: Page, app_url: str):
        """Test that user can type in the message input."""
        page.goto(app_url)

        # Find and fill the message input
        msg_input = page.locator("textarea[placeholder*='YouTube URL']")
        msg_input.fill("https://youtube.com/watch?v=test123")

        # Verify the input has the text
        expect(msg_input).to_have_value("https://youtube.com/watch?v=test123")

    def test_send_button_is_primary(self, page: Page, app_url: str):
        """Test that Send button has primary styling."""
        page.goto(app_url)

        # Check for primary variant button
        send_btn = page.locator("button:has-text('Send')").first
        expect(send_btn).to_be_visible()

    def test_login_prompt_for_unauthenticated_users(self, page: Page, app_url: str):
        """Test that unauthenticated users see login prompt in welcome."""
        page.goto(app_url)

        # Wait for welcome message
        page.wait_for_timeout(2000)

        # Check for sign in prompt
        expect(page.locator("text=sign in with HuggingFace")).to_be_visible()

    def test_clear_chat_works(self, page: Page, app_url: str):
        """Test that Clear Chat button clears the chatbot."""
        page.goto(app_url)

        # Wait for welcome message to appear
        page.wait_for_timeout(2000)
        expect(page.locator("text=Welcome to Video Analyzer")).to_be_visible()

        # Click clear chat
        clear_btn = page.locator("button:has-text('Clear Chat')")
        clear_btn.click()

        # Wait a moment for clear to process
        page.wait_for_timeout(500)

        # Welcome message should be gone (chat cleared)
        expect(page.locator("text=Welcome to Video Analyzer")).not_to_be_visible()

    def test_responsive_layout(self, page: Page, app_url: str):
        """Test that the layout is responsive."""
        page.goto(app_url)

        # Set mobile viewport
        page.set_viewport_size({"width": 375, "height": 667})

        # UI elements should still be visible
        expect(page.locator("text=Video Analyzer")).to_be_visible()
        expect(page.locator("button:has-text('Send')")).to_be_visible()

    def test_chatbot_has_height(self, page: Page, app_url: str):
        """Test that chatbot has appropriate height."""
        page.goto(app_url)

        # Get chatbot element
        chatbot = page.locator("[data-testid='chatbot']")
        box = chatbot.bounding_box()

        # Should have significant height (500px configured)
        assert box is not None
        assert box["height"] >= 400  # Allow some flexibility

    def test_theme_applied(self, page: Page, app_url: str):
        """Test that Soft theme is applied (lighter colors)."""
        page.goto(app_url)

        # The Soft theme should be applied - check body has gradio styling
        body = page.locator("body")
        expect(body).to_be_visible()