"""
pylsp plugin: injects i80/LRU packages into import completions.

Registered via entry_points group "pylsp" in pyproject.toml.
pylsp calls these hooks automatically when the plugin is installed.
"""

import asyncio
import logging

from pylsp import hookimpl

from .catalog import PypiCatalog

logger = logging.getLogger(__name__)

# Trigger characters that indicate we're completing an import statement
_IMPORT_TRIGGERS = {"import", "from"}


def _is_import_context(document, position) -> bool:
    """Return True if the cursor is on an import line."""
    line_num = position["line"]
    if line_num >= len(document.lines):
        return False
    line = document.lines[line_num].strip()
    return any(line.startswith(kw) for kw in _IMPORT_TRIGGERS)


@hookimpl
def pylsp_completions(config, workspace, document, position):
    """Inject i80 pypi packages when completing import statements."""
    if not _is_import_context(document, position):
        return []

    # PypiCatalog._packages is populated at startup; safe to read synchronously
    packages = PypiCatalog._packages
    if not packages:
        return []

    return [
        {
            "label": pkg["name"],
            "kind": 9,  # Module
            "detail": "i80 — pypi-server.i80.dk",
            "sortText": f"{pkg['sort_prefix']}{pkg['name']}",
            "documentation": {
                "kind": "markdown",
                "value": f"**{pkg['name']}**\n\nCustom i80/LRU package from `pypi-server.i80.dk`",
            },
        }
        for pkg in packages
    ]


@hookimpl
def pylsp_hover(config, workspace, document, position):
    """Show package docs on hover for i80 packages."""
    word = document.word_at_position(position)
    if not word:
        return None

    for pkg in PypiCatalog._packages:
        if pkg["name"] == word:
            return {
                "contents": {
                    "kind": "markdown",
                    "value": (
                        f"**{pkg['name']}** — i80 internal package\n\n"
                        f"Source: `pypi-server.i80.dk`\n\n"
                        f"Install: `pip install {pkg['name']} --index-url https://pypi-server.i80.dk/simple/`"
                    ),
                }
            }
    return None