from typing import cast

from agentci.engine.repository import Repository
from agentci.gitea import CommentInfo, Gitea, IssueInfo, PullRequestInfo
from agentci.workflows.context import build_issue_context, build_pull_request_context


class FakeIssueGitea:
    async def issue(self, *_args):
        return IssueInfo(number=2, title="Broken widget", body="It fails.", state="open")

    async def issue_comments(self, *_args):
        return [
            CommentInfo(1, "alice", "Details", "2026-01-01"),
            CommentInfo(2, "agentci", "Agent job queued", "2026-01-02"),
        ]


class FakeRepository:
    async def operational_comment_ids(self, *_args):
        return {2}


class FakePullRequestGitea:
    async def pull_request(self, *_args):
        return PullRequestInfo(
            number=3,
            title="Fix widget",
            body="Fixes the failure.",
            state="open",
            merged=False,
            base_branch="main",
            head_branch="fix-widget",
            head_sha="abcdef1234567890",
            head_owner="alice",
            head_repo="repo",
        )

    async def issue_comments(self, *_args):
        return [CommentInfo(3, "bob", "Please add a test.", "2026-01-03")]

    async def pull_reviews(self, *_args):
        return [
            {
                "id": 4,
                "user": {"login": "carol"},
                "state": "REQUEST_CHANGES",
                "body": "One issue remains.",
            }
        ]

    async def review_comments(self, *_args):
        return [
            {
                "path": "src/widget.py",
                "new_position": 12,
                "body": "Handle the empty value.",
            }
        ]

    async def pull_commits(self, *_args):
        return [{"sha": "abcdef1234567890", "commit": {"message": "Fix widget"}}]


class EmptyIssueGitea:
    async def issue(self, *_args):
        return IssueInfo(number=5, title="Empty issue", body="", state="open")

    async def issue_comments(self, *_args):
        return []


class EmptyRepository:
    async def operational_comment_ids(self, *_args):
        return set()


class EmptyPullRequestGitea:
    async def pull_request(self, *_args):
        return PullRequestInfo(
            number=6,
            title="Empty pull request",
            body="",
            state="open",
            merged=False,
            base_branch="main",
            head_branch="empty",
            head_sha="1234567890abcdef",
            head_owner="alice",
            head_repo="repo",
        )

    async def issue_comments(self, *_args):
        return []

    async def pull_reviews(self, *_args):
        return []

    async def pull_commits(self, *_args):
        return []

    async def review_comments(self, *_args):
        raise AssertionError("review comments should not be requested without reviews")


class OrderedPullRequestGitea(FakePullRequestGitea):
    async def issue_comments(self, *_args):
        return [
            CommentInfo(1, "alice", "First timeline comment", "2026-01-01"),
            CommentInfo(2, "bob", "Second timeline comment", "2026-01-02"),
        ]

    async def pull_reviews(self, *_args):
        return [
            {
                "id": 10,
                "user": {"login": "carol"},
                "state": "REQUEST_CHANGES",
                "body": "First formal review",
            },
            {
                "id": 11,
                "user": {"login": "dave"},
                "state": "APPROVED",
                "body": "Second formal review",
            },
        ]

    async def review_comments(self, *_args):
        review_id = _args[-1]
        if review_id == 10:
            return [
                {
                    "path": "src/old.py",
                    "new_position": None,
                    "old_position": 21,
                    "body": "Old-side position",
                }
            ]
        return [
            {
                "path": "src/new.py",
                "new_position": 34,
                "body": "New-side position",
            }
        ]

    async def pull_commits(self, *_args):
        return [
            {"sha": "111111111111aaaa", "commit": {"message": "First commit"}},
            {"sha": "222222222222bbbb", "commit": {"message": "Second commit"}},
        ]


async def test_issue_context_excludes_operational_comments() -> None:
    context = await build_issue_context(
        cast(Gitea, FakeIssueGitea()),
        cast(Repository, FakeRepository()),
        "org",
        "repo",
        2,
    )

    assert "Broken widget" in context
    assert "Details" in context
    assert "Agent job queued" not in context


async def test_pull_request_context_includes_feedback_and_commits() -> None:
    pull, context = await build_pull_request_context(
        cast(Gitea, FakePullRequestGitea()), "org", "repo", 3
    )

    assert pull.number == 3
    assert "Please add a test." in context
    assert "One issue remains." in context
    assert "`src/widget.py:12`: Handle the empty value." in context
    assert "abcdef123456 Fix widget" in context


async def test_issue_context_labels_empty_body_and_discussion() -> None:
    context = await build_issue_context(
        cast(Gitea, EmptyIssueGitea()),
        cast(Repository, EmptyRepository()),
        "org",
        "repo",
        5,
    )

    assert "## Issue body\n(empty)" in context
    assert "## Discussion\n(none)" in context


async def test_pull_request_context_labels_empty_sections() -> None:
    _, context = await build_pull_request_context(
        cast(Gitea, EmptyPullRequestGitea()), "org", "repo", 6
    )

    assert "## Pull request body\n(empty)" in context
    assert "## Commits\n(none)" in context
    assert "## Timeline discussion\n(none)" in context
    assert "## Formal and inline reviews\n(none)" in context


async def test_pull_request_context_preserves_source_order_and_positions() -> None:
    _, context = await build_pull_request_context(
        cast(Gitea, OrderedPullRequestGitea()), "org", "repo", 3
    )

    assert context.index("First timeline comment") < context.index("Second timeline comment")
    assert context.index("111111111111 First commit") < context.index("222222222222 Second commit")
    assert context.index("Review 10 by carol") < context.index("Review 11 by dave")
    assert "`src/old.py:21`: Old-side position" in context
    assert "`src/new.py:34`: New-side position" in context