"""Forgejo REST API tools."""

import json
import httpx
from ..config import settings

_client: httpx.AsyncClient | None = None


def _get_client() -> httpx.AsyncClient:
    global _client
    if _client is None:
        _client = httpx.AsyncClient(
            base_url=settings.forgejo_url,
            headers={
                "Authorization": f"token {settings.forgejo_token}",
                "Accept": "application/json",
            },
            timeout=30.0,
        )
    return _client


async def list_repos(org: str = "", limit: int = 20) -> dict:
    client = _get_client()
    if org:
        resp = await client.get(f"/api/v1/orgs/{org}/repos", params={"limit": limit})
    else:
        resp = await client.get("/api/v1/repos/search", params={"limit": limit})
    resp.raise_for_status()
    data = resp.json()
    repos = data if isinstance(data, list) else data.get("data", [])
    return {
        "repos": [
            {
                "full_name": r["full_name"],
                "description": r.get("description", ""),
                "default_branch": r.get("default_branch", "main"),
                "updated_at": r.get("updated_at", ""),
                "stars": r.get("stars_count", 0),
                "open_issues": r.get("open_issues_count", 0),
            }
            for r in repos
        ],
        "count": len(repos),
    }


async def read_file(repo: str, path: str, ref: str = "main") -> str:
    client = _get_client()
    resp = await client.get(f"/api/v1/repos/{repo}/raw/{path}", params={"ref": ref})
    resp.raise_for_status()
    return resp.text


async def create_branch(repo: str, branch: str, from_ref: str = "main") -> dict:
    client = _get_client()
    resp = await client.post(
        f"/api/v1/repos/{repo}/branches",
        json={"new_branch_name": branch, "old_branch_name": from_ref},
    )
    resp.raise_for_status()
    return {"branch": branch, "repo": repo, "status": "created"}


async def create_pr(
    repo: str, title: str, body: str,
    head: str, base: str = "main",
    labels: list[str] | None = None,
    metadata: dict | None = None,
) -> dict:
    client = _get_client()

    full_body = body
    if metadata:
        full_body += f"\n\n<!-- agent-metadata: {json.dumps(metadata)} -->"

    resp = await client.post(
        f"/api/v1/repos/{repo}/pulls",
        json={
            "title": title,
            "body": full_body,
            "head": head,
            "base": base,
        },
    )
    resp.raise_for_status()
    pr = resp.json()
    return {
        "number": pr["number"],
        "url": pr.get("html_url", ""),
        "state": pr["state"],
    }


async def get_pr(repo: str, pr_number: int) -> dict:
    client = _get_client()
    resp = await client.get(f"/api/v1/repos/{repo}/pulls/{pr_number}")
    resp.raise_for_status()
    pr = resp.json()

    ci = await ci_status(repo, ref=pr.get("head", {}).get("sha", ""))

    return {
        "number": pr["number"],
        "title": pr["title"],
        "state": pr["state"],
        "mergeable": pr.get("mergeable"),
        "body": pr.get("body", ""),
        "ci": ci,
        "created_at": pr.get("created_at"),
        "updated_at": pr.get("updated_at"),
    }


async def ci_status(repo: str, ref: str = "main") -> dict:
    client = _get_client()
    try:
        resp = await client.get(f"/api/v1/repos/{repo}/commits/{ref}/status")
        if resp.status_code == 200:
            data = resp.json()
            return {
                "state": data.get("state", "unknown"),
                "total": data.get("total_count", 0),
                "statuses": [
                    {"context": s.get("context"), "state": s.get("status")}
                    for s in data.get("statuses", [])
                ],
            }
    except Exception:
        pass
    return {"state": "unknown", "total": 0, "statuses": []}


async def merge_pr(repo: str, pr_number: int, method: str = "merge") -> dict:
    """Merge a PR. Only called by the confidence gate on auto-merge."""
    client = _get_client()
    resp = await client.post(
        f"/api/v1/repos/{repo}/pulls/{pr_number}/merge",
        json={"Do": method, "merge_message_field": ""},
    )
    resp.raise_for_status()
    return {"merged": True, "pr_number": pr_number}