import platform
from pathlib import Path
from wasabi import msg
import srsly

from .validate import get_model_pkgs
from .. import util
from .. import about


def info(
    model: ("Optional model name", "positional", None, str) = None,
    markdown: ("Generate Markdown for GitHub issues", "flag", "md", str) = False,
    silent: ("Don't print anything (just return)", "flag", "s") = False,
):
    """
    Print info about spaCy installation. If a model is speficied as an argument,
    print model information. Flag --markdown prints details in Markdown for easy
    copy-pasting to GitHub issues.
    """
    if model:
        if util.is_package(model):
            model_path = util.get_package_path(model)
        else:
            model_path = model
        meta_path = model_path / "meta.json"
        if not meta_path.is_file():
            msg.fail("Can't find model meta.json", meta_path, exits=1)
        meta = srsly.read_json(meta_path)
        if model_path.resolve() != model_path:
            meta["link"] = str(model_path)
            meta["source"] = str(model_path.resolve())
        else:
            meta["source"] = str(model_path)
        if not silent:
            title = f"Info about model '{model}'"
            model_meta = {
                k: v for k, v in meta.items() if k not in ("accuracy", "speed")
            }
            if markdown:
                print_markdown(model_meta, title=title)
            else:
                msg.table(model_meta, title=title)
        return meta
    all_models, _ = get_model_pkgs()
    data = {
        "spaCy version": about.__version__,
        "Location": str(Path(__file__).parent.parent),
        "Platform": platform.platform(),
        "Python version": platform.python_version(),
        "Models": ", ".join(
            f"{m['name']} ({m['version']})" for m in all_models.values()
        ),
    }
    if not silent:
        title = "Info about spaCy"
        if markdown:
            print_markdown(data, title=title)
        else:
            msg.table(data, title=title)
    return data


def print_markdown(data, title=None):
    """Print data in GitHub-flavoured Markdown format for issues etc.

    data (dict or list of tuples): Label/value pairs.
    title (unicode or None): Title, will be rendered as headline 2.
    """
    markdown = []
    for key, value in data.items():
        if isinstance(value, str) and Path(value).exists():
            continue
        markdown.append(f"* **{key}:** {value}")
    if title:
        print(f"\n## {title}")
    print("\n{}\n".format("\n".join(markdown)))