#!/usr/bin/env python3

# PEP 723 metadata
# /// script
# requires-python = ">=3.10"
# dependencies = [
#   "nltk",
#   "huggingface-hub"
# ]
# ///

# This script downloads every artifact that the `infiniflow/ragflow_deps`
# Docker image bakes in. Run it from anywhere — the `__main__` block
# chdir's into this file's own directory, so all outputs land under
# `ragflow_deps/` regardless of the caller's CWD.
#
# Build-context relationship: `ragflow_deps/Dockerfile` is built with
# `ragflow_deps/` as its build context, so the files written here MUST
# sit at the top of `ragflow_deps/`. The Dockerfile's COPY lines assume
# top-level paths (`huggingface.co`, `nltk_data`, `cl100k_base.tiktoken`,
# `*.deb`, `*.jar`, `*.tar.gz`, `stagehand-server-v3-linux-<arch>`).
#
# Typical workflow:
#
#   uv run python3 ragflow_deps/download_deps.py            # download
#   cd ragflow_deps
#   docker build -f Dockerfile -t infiniflow/ragflow_deps .
#
# The main `Dockerfile` (built from the project root) pulls this image
# via `--mount=type=bind,from=infiniflow/ragflow_deps:latest,...` and
# is unaffected by where these files live locally.

import argparse
import os
import sys
import requests
from typing import Union


def get_urls(use_china_mirrors=False) -> list[Union[str, list[str]]]:
    if use_china_mirrors:
        return [
            # stagehand-server-v3 Node.js SEA binaries (used by Browser
            # component in local mode).
            #
            # The stagehand-go Go module (pinned in go.mod) and the
            # stagehand-server binary (this release) are LOOSELY
            # MATCHED — both stay on the v3.x line and remain
            # protocol-compatible. The two version numbers do NOT
            # track each other: the Go SDK is at v3.21.0 while the
            # current latest server release is v3.7.2.
            #
            # On every go.mod bump, refresh this URL to the current
            # latest server release. There is no version
            # correspondence to maintain; "both on v3.x" is the
            # compatibility contract.
            "https://gh-proxy.com/https://github.com/browserbase/stagehand/releases/download/stagehand-server-v3/v3.7.2/stagehand-server-v3-linux-x64",
            "https://gh-proxy.com/https://github.com/browserbase/stagehand/releases/download/stagehand-server-v3/v3.7.2/stagehand-server-v3-linux-arm64",
            # Native static libraries for Go build (pdfium, pdf_oxide, office_oxide)
            # Used by build.sh's check_*_deps functions — pre-downloaded to avoid
            # network access during CI.
            ["https://gh-proxy.com/https://github.com/kognitos/pdfium-static/releases/download/chromium%2F7809/pdfium-linux-x64-static.tgz", "pdfium-linux-x64-static.tgz"],
            ["https://gh-proxy.com/https://github.com/yfedoseev/pdf_oxide/releases/download/v0.3.73/pdf_oxide-go-ffi-linux-amd64.tar.gz", "pdf_oxide-go-ffi-linux-amd64.tar.gz"],
            ["https://gh-proxy.com/https://github.com/yfedoseev/office_oxide/releases/download/v0.1.3/native-linux-x86_64.tar.gz", "office_oxide-linux-x86_64.tar.gz"],
        ]
    else:
        return [
            # stagehand-server-v3 Node.js SEA binaries (used by Browser
            # component in local mode).
            #
            # The stagehand-go Go module (pinned in go.mod) and the
            # stagehand-server binary (this release) are LOOSELY
            # MATCHED — both stay on the v3.x line and remain
            # protocol-compatible. The two version numbers do NOT
            # track each other: the Go SDK is at v3.21.0 while the
            # current latest server release is v3.7.2.
            #
            # On every go.mod bump, refresh this URL to the current
            # latest server release. There is no version
            # correspondence to maintain; "both on v3.x" is the
            # compatibility contract.
            "https://github.com/browserbase/stagehand/releases/download/stagehand-server-v3/v3.7.2/stagehand-server-v3-linux-x64",
            "https://github.com/browserbase/stagehand/releases/download/stagehand-server-v3/v3.7.2/stagehand-server-v3-linux-arm64",
            # Native static libraries for Go build (pdfium, pdf_oxide, office_oxide)
            # Used by build.sh's check_*_deps functions — pre-downloaded to avoid
            # network access during CI.
            ["https://github.com/kognitos/pdfium-static/releases/download/chromium%2F7809/pdfium-linux-x64-static.tgz", "pdfium-linux-x64-static.tgz"],
            ["https://github.com/yfedoseev/pdf_oxide/releases/download/v0.3.73/pdf_oxide-go-ffi-linux-amd64.tar.gz", "pdf_oxide-go-ffi-linux-amd64.tar.gz"],
            ["https://github.com/yfedoseev/office_oxide/releases/download/v0.1.3/native-linux-x86_64.tar.gz", "office_oxide-linux-x86_64.tar.gz"],
        ]


def download_with_progress(url, filename):
    response = requests.get(url, stream=True)
    total_size = int(response.headers.get("content-length", 0))
    block_size = 1024

    with open(filename, "wb") as file:
        downloaded = 0
        for data in response.iter_content(block_size):
            file.write(data)
            downloaded += len(data)

            if total_size > 0:
                progress = (downloaded / total_size) * 100
                sys.stdout.write(f"\rProgress: {progress:.1f}% ({downloaded}/{total_size} bytes)")
                sys.stdout.flush()

    print()


if __name__ == "__main__":
    # Anchor CWD to this file's directory so all relative outputs
    # (huggingface.co/, nltk_data/, *.deb, *.jar, *.tar.gz, etc.) land
    # at the top of ragflow_deps/ regardless of where the user invokes
    # the script from. This is the build context for `ragflow_deps/Dockerfile`.
    os.chdir(os.path.dirname(os.path.abspath(__file__)))

    parser = argparse.ArgumentParser(description="Download dependencies with optional China mirror support")
    parser.add_argument("--china-mirrors", action="store_true", help="Use China-accessible mirrors for downloads")
    args = parser.parse_args()

    urls = get_urls(args.china_mirrors)

    # Some mirrors (e.g. archive.ubuntu.com) reject the default urllib
    # User-Agent with HTTP 403, so install an opener with a browser-like UA.
    #     opener = urllib.request.build_opener()
    #     opener.addheaders = [("User-Agent", "Mozilla/5.0")]
    #     urllib.request.install_opener(opener)

    for url in urls:
        download_url = url[0] if isinstance(url, list) else url
        filename = url[1] if isinstance(url, list) else url.split("/")[-1]
        print(f"Downloading {filename} from {download_url}...")
        if not os.path.exists(filename):
            download_with_progress(download_url, filename)

    # Extract native static libraries to ~/ragflow-native-libs for Go build.
    # Ensures build.sh can find them without network access.
    native_deps_dir = os.path.expanduser("~/ragflow-native-libs")
    extractions = [
        ("pdfium-linux-x64-static.tgz", "pdfium-static"),
        ("pdf_oxide-go-ffi-linux-amd64.tar.gz", "pdf_oxide"),
        ("office_oxide-linux-x86_64.tar.gz", "office_oxide"),
    ]
    import tarfile

    for archive, subdir in extractions:
        archive_path = os.path.join(os.getcwd(), archive)
        if not os.path.isfile(archive_path):
            print(f"  Skipping extraction: {archive} not found")
            continue
        target = os.path.join(native_deps_dir, subdir)
        if os.path.isdir(target):
            print(f"  ✓ {subdir} already extracted to {target}")
            continue
        os.makedirs(target, exist_ok=True)
        print(f"  Extracting {archive} → {target}")
        with tarfile.open(archive_path) as tf:
            tf.extractall(target)
