import os
os.system("playwright install")
# app.py (Final Version with Search Engines and Improved Formatting)

import gradio as gr
from playwright.async_api import async_playwright
from bs4 import BeautifulSoup, NavigableString
import urllib.parse
import os
from itertools import cycle
import uuid

# --- 1. GLOBAL RESOURCES & STATE ---
P = None
BROWSER = None
REVOLVER = None
LIVE_CONTEXTS = {}
APP_STARTED = False

# New: Search Engine Configuration
SEARCH_ENGINES = {
    "DuckDuckGo": "https://duckduckgo.com/html/?q={query}",
    "Google": "https://www.google.com/search?q={query}",
    "Bing": "https://www.bing.com/search?q={query}",
    "Brave": "https://search.brave.com/search?q={query}",
    "Ecosia": "https://www.ecosia.org/search?q={query}"
}

# --- 2. PLAIN DATA STATE CLASSES ---
class TabState:
    def __init__(self, tab_id, proxy_used="Direct Connection"):
        self.id, self.url, self.title = tab_id, "about:blank", "New Tab"
        self.parsed_text, self.links, self.proxy_used = "Welcome!", [], proxy_used

class BrowserState:
    def __init__(self): self.tabs, self.active_tab_id = [], None
    def get_active_tab(self): return next((t for t in self.tabs if t.id == self.active_tab_id), None)

class CredentialRevolver:
    def __init__(self, proxy_string: str):
        self.proxies = self._parse_proxies(proxy_string)
        self.proxy_cycler = cycle(self.proxies) if self.proxies else None
    def _parse_proxies(self, proxy_string: str):
        proxies = []
        for line in proxy_string.strip().splitlines():
            try:
                parsed = urllib.parse.urlparse(f"//{line.strip()}")
                server = f"{parsed.scheme or 'http'}://{parsed.hostname}:{parsed.port}"
                proxies.append({"server": server, "username": parsed.username, "password": parsed.password})
            except: pass
        return proxies
    def get_next(self): return next(self.proxy_cycler) if self.proxy_cycler else None
    def count(self): return len(self.proxies) if self.proxies else 0

# --- 3. CORE ASYNC LOGIC with NEW FORMATTER ---

def _format_html_to_markdown(soup):
    """
    NEW: Intelligently converts a BeautifulSoup object to formatted Markdown.
    """
    text_parts = []
    
    # Use a more specific main content area if available
    content_node = soup.find('main') or soup.find('body')
    if not content_node:
        return "Could not find main body content."

    for element in content_node.find_all(recursive=False):
        # Ignore common non-content sections
        if element.name in ['nav', 'footer', 'header', 'aside', 'form', 'script', 'style']:
            continue
        text_parts.append(_process_element_to_markdown(element))
        
    return '\n'.join(filter(None, text_parts))

def _process_element_to_markdown(element):
    """NEW: Recursive helper to process each element into Markdown."""
    if isinstance(element, NavigableString):
        return element.strip()
    
    if element.name is None:
        return ''

    # Get the inner text by recursively processing children
    inner_text = ''.join(_process_element_to_markdown(child) for child in element.children)

    # Apply formatting based on tag name
    if element.name in ['p', 'div', 'article', 'section']:
        return f"\n{inner_text.strip()}\n"
    if element.name == 'h1':
        return f"\n# {inner_text.strip()}\n"
    if element.name == 'h2':
        return f"\n## {inner_text.strip()}\n"
    if element.name == 'h3':
        return f"\n### {inner_text.strip()}\n"
    if element.name in ['h4', 'h5', 'h6']:
        return f"\n#### {inner_text.strip()}\n"
    if element.name == 'li':
        return f"* {inner_text.strip()}\n"
    if element.name in ['ul', 'ol']:
        return f"\n{inner_text}\n"
    if element.name in ['strong', 'b']:
        return f"**{inner_text.strip()}**"
    if element.name in ['em', 'i']:
        return f"*{inner_text.strip()}*"
    if element.name in ['pre', 'code']:
        return f"\n```\n{inner_text.strip()}\n```\n"
    if element.name == 'a':
        href = element.get('href', '')
        return f"[{inner_text.strip()}]({href})"
    if element.name == 'hr':
        return "\n---\n"
    
    return inner_text # For other tags like span, etc.

async def _fetch_and_update_tab_state(tab_state: TabState, url: str):
    """Uses Playwright to navigate and the new formatter to parse."""
    log = f"▶️ Navigating to {url}..."; live_page = LIVE_CONTEXTS[tab_state.id]["page"]
    try:
        await live_page.goto(url, wait_until='domcontentloaded', timeout=30000)
        tab_state.url = live_page.url; tab_state.title = await live_page.title() or "No Title"
        log += f"\n✅ Arrived at: {tab_state.url}"
        
        html_content = await live_page.content()
        soup = BeautifulSoup(html_content, 'lxml')
        
        # Use the new formatter
        tab_state.parsed_text = _format_html_to_markdown(soup)
        
        tab_state.links = [{'text': link.get_text(strip=True) or "[No Link Text]", 'url': urllib.parse.urljoin(tab_state.url, link['href'])} for link in soup.find_all('a', href=True) if link.get('href', '').startswith('http')]
        log += f"\n🔗 Found {len(tab_state.links)} links."
    except Exception as e:
        error_message = str(e).splitlines()[0]; tab_state.title = "Error"; tab_state.url = url
        tab_state.parsed_text = f"❌ Failed to load page.\n\nError: {error_message}"
        tab_state.links = []; log += f"\n❌ {error_message}"
    return log

async def handle_action(browser_state: BrowserState, search_engine: str, action: str, value=None):
    """Main logic handler, now with search engine selection."""
    log = ""; active_tab_state = browser_state.get_active_tab()
    
    if action == "go" and active_tab_state and value:
        is_url = urllib.parse.urlparse(value).scheme and urllib.parse.urlparse(value).netloc
        if is_url:
            url = value
        else: # It's a search query
            base_url = SEARCH_ENGINES.get(search_engine, SEARCH_ENGINES["DuckDuckGo"])
            url = base_url.format(query=urllib.parse.quote_plus(value))
        log = await _fetch_and_update_tab_state(active_tab_state, url)
    
    # --- Other actions remain the same ---
    elif action == "new_tab":
        tab_id, proxy_config = str(uuid.uuid4()), REVOLVER.get_next()
        context = await BROWSER.new_context(proxy=proxy_config)
        page = await context.new_page()
        LIVE_CONTEXTS[tab_id] = {"context": context, "page": page}
        new_tab = TabState(tab_id, proxy_used=proxy_config['server'].split('@')[-1] if proxy_config else "Direct")
        browser_state.tabs.append(new_tab); browser_state.active_tab_id = tab_id
        log = await _fetch_and_update_tab_state(new_tab, "https://www.startpage.com/") # New default page
    elif action == "click" and active_tab_state and value is not None:
        try:
            link_index = int(value)
            if 0 <= link_index < len(active_tab_state.links): log = await _fetch_and_update_tab_state(active_tab_state, active_tab_state.links[link_index]['url'])
            else: log = "Invalid link number."
        except: log = "Please enter a valid number to click."
    elif action == "close_tab" and active_tab_state:
        if len(browser_state.tabs) > 1:
            tab_to_close_id = browser_state.active_tab_id; tab_index = browser_state.tabs.index(active_tab_state)
            browser_state.tabs.pop(tab_index); new_index = tab_index - 1 if tab_index > 0 else 0
            browser_state.active_tab_id = browser_state.tabs[new_index].id
            resources = LIVE_CONTEXTS.pop(tab_to_close_id); await resources['context'].close(); log = f"💣 Tab closed."
        else: log = "Cannot close the last tab."
    elif action == "switch_tab" and value is not None:
        browser_state.active_tab_id = value; log = f"Switched to tab."
    return browser_state, log

# --- 4. GRADIO UI AND EVENT HANDLING ---
with gr.Blocks(theme=gr.themes.Soft(), title="Real Browser Demo") as demo:
    browser_state = gr.State(BrowserState())
    gr.Markdown("# 🛰️ Real Browser Demo v2")
    
    with gr.Row():
        with gr.Column(scale=4):
            with gr.Row():
                url_textbox = gr.Textbox(label="Enter URL or Search Query", interactive=True, scale=4)
                go_btn = gr.Button("Go", variant="primary", scale=1)
            with gr.Accordion("Page Content (Formatted)", open=True):
                page_content = gr.Markdown("Loading...")
        with gr.Column(scale=2):
            # NEW: Search Engine Selector
            search_engine_selector = gr.Radio(
                list(SEARCH_ENGINES.keys()), value="DuckDuckGo", label="Search Engine"
            )
            with gr.Row():
                new_tab_btn = gr.Button("➕ New Tab"); close_tab_btn = gr.Button("❌ Close Tab")
            tab_selector = gr.Radio(choices=[], label="Active Tabs", interactive=True)
            with gr.Accordion("Clickable Links", open=True):
                links_display = gr.Markdown("...");
                with gr.Row():
                    click_num_box = gr.Number(label="Link #", scale=1, minimum=0, step=1)
                    click_btn = gr.Button("Click Link", scale=2)
    
    log_display = gr.Textbox(label="Status Log", interactive=False)

    all_outputs = [page_content, url_textbox, links_display, tab_selector, log_display]
    
    async def master_handler(current_state, search_engine, action, value=None):
        global APP_STARTED, P, BROWSER, REVOLVER
        if not APP_STARTED:
            print("🚀 First request received, starting up Playwright...");
            P = await async_playwright().start(); BROWSER = await P.firefox.launch(headless=True)
            proxy_list_str = os.getenv("PROXY_LIST", ""); REVOLVER = CredentialRevolver(proxy_list_str)
            print(f"✅ Playwright started. {REVOLVER.count()} proxies loaded."); APP_STARTED = True
        
        new_state, log = await handle_action(current_state, search_engine, action, value)
        ui_updates = update_ui_components(current_state) # Use current state for UI updates
        
        return (
            new_state,
            ui_updates[page_content],
            ui_updates[url_textbox],
            ui_updates[links_display],
            ui_updates[tab_selector],
            log
        )
    
    # Each event listener is its own async function.
    async def on_load(state, search_engine):
        return await master_handler(state, search_engine, "new_tab", None)
    async def on_go_click(state, search_engine, value):
        return await master_handler(state, search_engine, "go", value)
    async def on_click_link(state, search_engine, value):
        return await master_handler(state, search_engine, "click", value)
    async def on_new_tab(state, search_engine):
        return await master_handler(state, search_engine, "new_tab", None)
    async def on_close_tab(state, search_engine):
        return await master_handler(state, search_engine, "close_tab", None)
    async def on_switch_tab(state, search_engine, value):
        return await master_handler(state, search_engine, "switch_tab", value)
        
    # Wire up the event handlers
    go_inputs = [browser_state, search_engine_selector, url_textbox]
    click_inputs = [browser_state, search_engine_selector, click_num_box]
    tab_inputs = [browser_state, search_engine_selector]
    switch_inputs = [browser_state, search_engine_selector, tab_selector]
    outputs = [browser_state, *all_outputs]

    demo.load(on_load, tab_inputs, outputs)
    go_btn.click(on_go_click, go_inputs, outputs, show_progress="full")
    url_textbox.submit(on_go_click, go_inputs, outputs, show_progress="full")
    click_btn.click(on_click_link, click_inputs, outputs, show_progress="full")
    new_tab_btn.click(on_new_tab, tab_inputs, outputs, show_progress="full")
    close_tab_btn.click(on_close_tab, tab_inputs, outputs)
    tab_selector.input(on_switch_tab, switch_inputs, outputs)

demo.launch()