#!/usr/bin/env python3
# License: MIT
# Copyright (C) 2024, Shinon.
# Code inspiration from Ronsor Labs. Licensed as below.
# License: AGPL 3.0
# Copyright (C) 2023, 2024 Ronsor Labs.
import asyncio
import concurrent.futures as conc
import csv
import pathlib
import random
import urllib.parse

import aiofile
import httpx
import orjson
import tqdm
from bs4 import BeautifulSoup

from proxy_magic_session import get_async_session

CONCURRENT_WORKERS = 128

executor = conc.ProcessPoolExecutor(max_workers=64)

queue = asyncio.Queue(maxsize=1048576)

WIKI_LIST = pathlib.Path("fandom_wikis_210224.csv")
OUPUT_JSONL = pathlib.Path("fandom_wikis_pages_210224_v2.jsonl")


def parse_special_index(html_text: str):
    doc = BeautifulSoup(html_text, "lxml")

    page_list_li = doc.select("ul.mw-allpages-chunk li a")
    page_list = set()
    for page_item in page_list_li:
        page_title = page_item.get("title", "")
        if not page_title or page_title is None:
            print("[W] no page title?")
            continue
        if page_title.lower().rstrip().endswith("(redirect)"):
            continue
        else:
            page_list.add(page_item["title"])
    page_list = list(page_list)

    next_url = doc.select(".mw-allpages-nav a")
    if next_url is None or len(next_url) == 0:
        next_url = None
    else:
        candidates = next_url
        next_url = None
        for x in candidates:
            if "next page" in x.text.lower():
                if "index.php" not in x["href"].lower():
                    next_url = x["href"].split("=", 1)
                    next_url[1] = urllib.parse.quote_plus(
                        next_url[1].replace("+", "__SAFE_PLUS__")
                    ).replace("__SAFE_PLUS__", "+")
                    next_url = "=".join(next_url)
                else:
                    next_url = x["href"]

    return page_list, next_url


async def domain_procesor(domain: str, path: str):
    session: httpx.AsyncClient = get_async_session()
    loop = asyncio.get_running_loop()
    session.cookies.clear()
    session.headers["user-agent"] = (
        "Mozilla/6.2 (compatible; Microsoft Chrome 137.0; Apple Gecko 47.0 in AOL Firefox 37.6) Google Toolbar/1.3"
    )
    print(f"[I] Processing: https://{domain}{path}Special:AllPages")
    tries = 10
    # pbar = tqdm.tqdm(desc=f"{domain}")
    data = None
    while True:
        try:
            data = await session.get(
                f"https://{domain}{path}Special:AllPages", follow_redirects=True
            )
            if data.status_code != 200:
                if data.status_code == 410:
                    break

                # print(f"https://{domain}{path}Special:AllPages", data.status_code)
                continue
            break
        except httpx.TransportError as e:
            await session.aclose()
            session: httpx.AsyncClient = get_async_session()
            print(f"[W] Retry TransportError https://{domain}{path} {e}")
            await asyncio.sleep(1)
            tries -= 1
        except httpx.HTTPError as e:
            print(f"[W] Uncaught Exception Retry... https://{domain}{path} | {e}")
            await session.aclose()
            session: httpx.AsyncClient = get_async_session()
            # print(f"[W] Retry TransportError https://{domain}{path} {e}")
            await asyncio.sleep(1)
            tries -= 1
        except Exception as e:
            print(f"[W] Uncaught Exception https://{domain}{path} | {e}")
            break
        if tries <= 0:
            print(f"[W] Tries Exceeded https://{domain}{path}")
            break

    if tries <= 0 or data is None:
        return
    if data.status_code == 410:
        return

    # Handle redirected domains
    domain = data.url.host

    page_list, next_url = await loop.run_in_executor(
        executor, parse_special_index, data.text
    )
    # pbar.update(len(page_list))
    while next_url:
        tries = 10
        data = None
        while True:
            try:
                data = await session.get(
                    f"https://{domain}{next_url}", follow_redirects=True
                )
                if data.status_code != 200:
                    if data.status_code == 410:
                        break
                    print(f"https://{domain}{next_url}", data.status_code)
                    continue
                break
            except httpx.TransportError as e:
                await session.aclose()
                session: httpx.AsyncClient = get_async_session()
                print(f"[W2] Retry TransportError https://{domain}{next_url} {e}")
                await asyncio.sleep(1)
                tries -= 1
            except httpx.HTTPError as e:
                print(
                    f"[W2] Uncaught Exception Retry... https://{domain}{next_url} | {e}"
                )
                await session.aclose()
                session: httpx.AsyncClient = get_async_session()
                # print(f"[W] Retry TransportError https://{domain}{path} {e}")
                await asyncio.sleep(1)
                tries -= 1
            except Exception as e:
                print(f"[W2] Uncaught Exception https://{domain}{next_url} | {e}")
                break
            if tries <= 0:
                print(f"[W2] Tries Exceeded https://{domain}{next_url}")
                break
        if tries <= 0 or data is None:
            return
        if data.status_code == 410:
            return
        new_page_list, next_url = await loop.run_in_executor(
            executor, parse_special_index, data.text
        )
        # pbar.update(len(new_page_list))
        page_list.extend(new_page_list)
    # pbar.close()
    print(f"[I] Done: {domain} | {len(page_list)}")
    await session.aclose()
    return page_list


export_queue = asyncio.Queue(CONCURRENT_WORKERS + 1)


async def compiler_worker():
    loop = asyncio.get_running_loop()
    async with aiofile.async_open(OUPUT_JSONL, "ab") as f:
        while True:
            page_data = await export_queue.get()
            if page_data is None:
                break
            domain, pages, path = page_data
            print(f"[I] Dump: {domain}")
            fi = {"domain": domain, "path": path, "pages": pages}
            bytes_data = await loop.run_in_executor(executor, orjson.dumps, fi)
            await f.write(bytes_data)
            await f.write(b"\n")
            print(f"[I] OKDump: {domain}")


async def worker():
    await asyncio.sleep(random.uniform(1, CONCURRENT_WORKERS / 60))
    while True:
        domain_root = await queue.get()
        if domain_root is None:
            break
        domain, _, path, __ = domain_root
        if path == "":
            path = "/wiki/"
        if "vpn-restricted" in domain:
            continue
        pages = await domain_procesor(domain, path)
        if pages is None:
            continue
        await export_queue.put((domain, pages, path))


async def main():
    loop = asyncio.get_running_loop()
    workers = [loop.create_task(worker()) for _ in range(CONCURRENT_WORKERS)]
    writer = loop.create_task(compiler_worker())

    seen_domains = set()
    if OUPUT_JSONL.exists():
        print("[I] Fetching seen domains...")
        with open(OUPUT_JSONL, "rb") as f:
            for line in tqdm.tqdm(f, desc="Domains Parsed"):
                seen_domains.add(orjson.loads(line)["domain"])

    with open(WIKI_LIST) as f:
        reader = csv.reader(f)
        for line in reader:
            if len(line) == 0:
                continue
            domain, friendly_name, path, has_scraped = line
            if domain[0] == "#":
                continue
            if domain in seen_domains:
                continue
            await queue.put((domain, friendly_name, path, has_scraped))
    for _ in range(CONCURRENT_WORKERS + 1):
        await queue.put(None)

    await asyncio.gather(*workers)
    await export_queue.put(None)
    await asyncio.gather(writer)


if __name__ == "__main__":
    asyncio.run(main())