import argparse
import importlib.util
from pathlib import Path

import pytest


MODULE_PATH = Path(__file__).with_name("gh_pr_watch.py")
MODULE_SPEC = importlib.util.spec_from_file_location("gh_pr_watch", MODULE_PATH)
gh_pr_watch = importlib.util.module_from_spec(MODULE_SPEC)
assert MODULE_SPEC.loader is not None
MODULE_SPEC.loader.exec_module(gh_pr_watch)


def sample_pr():
    return {
        "number": 123,
        "url": "https://github.com/openai/codex/pull/123",
        "repo": "openai/codex",
        "head_sha": "abc123",
        "head_branch": "feature",
        "state": "OPEN",
        "merged": False,
        "closed": False,
        "mergeable": "MERGEABLE",
        "merge_state_status": "CLEAN",
        "review_decision": "",
    }


def sample_checks(**overrides):
    checks = {
        "pending_count": 0,
        "failed_count": 0,
        "passed_count": 12,
        "all_terminal": True,
    }
    checks.update(overrides)
    return checks


def test_collect_snapshot_fetches_review_items_before_ci(monkeypatch, tmp_path):
    call_order = []
    pr = sample_pr()

    monkeypatch.setattr(gh_pr_watch, "resolve_pr", lambda *args, **kwargs: pr)
    monkeypatch.setattr(gh_pr_watch, "load_state", lambda path: ({}, True))
    monkeypatch.setattr(
        gh_pr_watch,
        "get_authenticated_login",
        lambda: call_order.append("auth") or "octocat",
    )
    monkeypatch.setattr(
        gh_pr_watch,
        "fetch_new_review_items",
        lambda *args, **kwargs: call_order.append("review") or [],
    )
    monkeypatch.setattr(
        gh_pr_watch,
        "get_pr_checks",
        lambda *args, **kwargs: call_order.append("checks") or [],
    )
    monkeypatch.setattr(
        gh_pr_watch,
        "summarize_checks",
        lambda checks: call_order.append("summarize") or sample_checks(),
    )
    monkeypatch.setattr(
        gh_pr_watch,
        "get_workflow_runs_for_sha",
        lambda *args, **kwargs: call_order.append("workflow") or [],
    )
    monkeypatch.setattr(
        gh_pr_watch,
        "failed_runs_from_workflow_runs",
        lambda *args, **kwargs: call_order.append("failed_runs") or [],
    )
    monkeypatch.setattr(
        gh_pr_watch,
        "recommend_actions",
        lambda *args, **kwargs: call_order.append("recommend") or ["idle"],
    )
    monkeypatch.setattr(gh_pr_watch, "save_state", lambda *args, **kwargs: None)

    args = argparse.Namespace(
        pr="123",
        repo=None,
        state_file=str(tmp_path / "watcher-state.json"),
        max_flaky_retries=3,
    )

    gh_pr_watch.collect_snapshot(args)

    assert call_order.index("review") < call_order.index("checks")
    assert call_order.index("review") < call_order.index("workflow")


def test_recommend_actions_prioritizes_review_comments():
    actions = gh_pr_watch.recommend_actions(
        sample_pr(),
        sample_checks(failed_count=1),
        [{"run_id": 99}],
        [{"kind": "review_comment", "id": "1"}],
        0,
        3,
    )

    assert actions == [
        "process_review_comment",
        "diagnose_ci_failure",
        "retry_failed_checks",
    ]


def test_run_watch_keeps_polling_open_ready_to_merge_pr(monkeypatch):
    sleeps = []
    events = []
    snapshot = {
        "pr": sample_pr(),
        "checks": sample_checks(),
        "failed_runs": [],
        "new_review_items": [],
        "actions": ["ready_to_merge"],
        "retry_state": {
            "current_sha_retries_used": 0,
            "max_flaky_retries": 3,
        },
    }

    monkeypatch.setattr(
        gh_pr_watch,
        "collect_snapshot",
        lambda args: (snapshot, Path("/tmp/codex-babysit-pr-state.json")),
    )
    monkeypatch.setattr(
        gh_pr_watch,
        "print_event",
        lambda event, payload: events.append((event, payload)),
    )

    class StopWatch(Exception):
        pass

    def fake_sleep(seconds):
        sleeps.append(seconds)
        if len(sleeps) >= 2:
            raise StopWatch

    monkeypatch.setattr(gh_pr_watch.time, "sleep", fake_sleep)

    with pytest.raises(StopWatch):
        gh_pr_watch.run_watch(argparse.Namespace(poll_seconds=30))

    assert sleeps == [30, 30]
    assert [event for event, _ in events] == ["snapshot", "snapshot"]