from typing import Any

from langgraph.config import get_config

from agent.utils.slack import GitHubPrRef, parse_github_pr_url


async def trigger_pr_review_from_ref(
    pr_ref: GitHubPrRef,
    *,
    source: str,
    github_login: str = "",
    github_user_id: int | None = None,
    slack_channel_id: str = "",
    slack_thread_ts: str = "",
    instructions: str = "",
    request_verdict: bool = False,
) -> dict[str, Any]:
    from agent.webhooks.github import trigger_pr_review_from_ref as _trigger_pr_review_from_ref

    return await _trigger_pr_review_from_ref(
        pr_ref,
        source=source,
        github_login=github_login,
        github_user_id=github_user_id,
        slack_channel_id=slack_channel_id,
        slack_thread_ts=slack_thread_ts,
        instructions=instructions,
        request_verdict=request_verdict,
    )


async def request_pr_review(
    pr_url: str,
    instructions: str = "",
    request_verdict: bool = False,
) -> dict[str, Any]:
    """Start the reviewer agent for a GitHub pull request URL.

    Args:
        pr_url: The pull request URL, e.g.
            ``https://github.com/OWNER/REPO/pull/NUMBER``.
        instructions: The requesting user's review instructions, passed
            VERBATIM (do not paraphrase, summarize, or add your own). They may
            set review focus, a merge bar, or verdict criteria for the
            reviewer.
        request_verdict: Set True ONLY when the user explicitly asked for a
            review verdict (approve / request changes) in their own words.
            Never infer it from tone or context. When True, the reviewer run
            is authorized to submit a real GitHub APPROVE or REQUEST_CHANGES;
            otherwise it publishes an advisory comment review. Never attempt
            to approve or request changes yourself via ``gh pr review`` or the
            GitHub API — that path is blocked.
    """
    pr_ref = parse_github_pr_url(pr_url)
    if not pr_ref:
        return {
            "success": False,
            "error": "Expected a GitHub PR URL like https://github.com/OWNER/REPO/pull/NUMBER",
        }

    configurable = get_config().get("configurable", {})
    source = configurable.get("source") or "agent"
    slack_thread = configurable.get("slack_thread") or {}
    return await trigger_pr_review_from_ref(
        pr_ref,
        source=source,
        github_login=configurable.get("github_login", ""),
        github_user_id=configurable.get("github_user_id"),
        slack_channel_id=slack_thread.get("channel_id", ""),
        slack_thread_ts=slack_thread.get("thread_ts", ""),
        instructions=instructions,
        request_verdict=request_verdict,
    )