"""Confluence REST API v1 client using httpx."""

from __future__ import annotations

import os
from dataclasses import dataclass

import httpx


@dataclass
class PageData:
    """Confluence page data."""

    page_id: str
    title: str
    body_html: str
    version: int


@dataclass
class Auth:
    """Confluence authentication credentials."""

    base_url: str
    username: str
    api_token: str

    @classmethod
    def from_env(cls) -> Auth:
        """Load auth from environment variables."""
        return cls(
            base_url=os.environ.get("CONFLUENCE_URL", ""),
            username=os.environ.get("CONFLUENCE_USERNAME", os.environ.get("CONFLUENCE_USER", "")),
            api_token=os.environ.get("CONFLUENCE_API_TOKEN", ""),
        )

    @property
    def httpx_auth(self) -> tuple[str, str]:
        return (self.username, self.api_token)


async def get_page(page_id: str, auth: Auth) -> PageData:
    """Fetch a Confluence page with body.storage and version."""
    url = f"{auth.base_url}/rest/api/content/{page_id}"
    params = {"expand": "body.storage,version,title"}
    async with httpx.AsyncClient(timeout=15.0) as client:
        resp = await client.get(url, params=params, auth=auth.httpx_auth)
        resp.raise_for_status()
        data = resp.json()

    return PageData(
        page_id=str(data["id"]),
        title=data["title"],
        body_html=data["body"]["storage"]["value"],
        version=data["version"]["number"],
    )


async def put_page(
    page_id: str,
    title: str,
    body_html: str,
    version: int,
    auth: Auth,
) -> PageData:
    """Update a Confluence page with version increment.

    Raises httpx.HTTPStatusError on 409 (version conflict) or other errors.
    """
    url = f"{auth.base_url}/rest/api/content/{page_id}"
    payload = {
        "version": {"number": version},
        "title": title,
        "type": "page",
        "body": {
            "storage": {
                "value": body_html,
                "representation": "storage",
            }
        },
    }
    async with httpx.AsyncClient(timeout=15.0) as client:
        resp = await client.put(url, json=payload, auth=auth.httpx_auth)
        resp.raise_for_status()
        data = resp.json()

    return PageData(
        page_id=str(data["id"]),
        title=data["title"],
        body_html=data["body"]["storage"]["value"],
        version=data["version"]["number"],
    )