"""Unit: GiteaClient + GiteaForge (PRD forge-native-integration)."""

from __future__ import annotations

import json
import unittest
import urllib.error
from io import BytesIO
from unittest.mock import MagicMock, patch

from bot_bottle.contrib.gitea.client import GiteaClient, GiteaForge


def _client() -> GiteaClient:
    return GiteaClient(
        api_url="https://gitea.example.com/api/v1",
        owner="didericis",
        repo="bot-bottle",
        token="test-token",
    )


def _resp(body: object, status: int = 200) -> MagicMock:
    resp = MagicMock()
    resp.read.return_value = json.dumps(body).encode() if body is not None else b""
    resp.status = status
    resp.__enter__ = lambda s: s  # type: ignore
    resp.__exit__ = MagicMock(return_value=False)
    return resp


def _http_error(code: int, body: str = "") -> urllib.error.HTTPError:
    return urllib.error.HTTPError(
        url="http://x", code=code, msg="err", hdrs=None,  # type: ignore[arg-type]
        fp=BytesIO(body.encode()),
    )


_URLOPEN = "bot_bottle.contrib.gitea.client.urllib.request.urlopen"


class TestOrgMembership(unittest.TestCase):
    def test_member_returns_true_on_2xx(self):
        with patch(_URLOPEN, return_value=_resp(None, 204)) as m:
            self.assertTrue(_client().is_org_member("bot-bottle", "alice"))
        req = m.call_args.args[0]
        self.assertIn("/orgs/bot-bottle/members/alice", req.full_url)

    def test_nonmember_returns_false_on_404(self):
        with patch(_URLOPEN, side_effect=_http_error(404)):
            self.assertFalse(_client().is_org_member("bot-bottle", "stranger"))

    def test_other_http_error_raises(self):
        with patch(_URLOPEN, side_effect=_http_error(403, "forbidden")):
            with self.assertRaises(RuntimeError) as ctx:
                _client().is_org_member("bot-bottle", "alice")
        self.assertIn("403", str(ctx.exception))


class TestForgeReads(unittest.TestCase):
    def test_read_issue_maps_fields(self):
        raw = {"number": 17, "title": "Bug", "body": "broken", "state": "open"}
        with patch(_URLOPEN, return_value=_resp(raw)) as m:
            issue = GiteaForge(_client()).read_issue(17)
        self.assertEqual((17, "Bug", "broken", "open"),
                         (issue.number, issue.title, issue.body, issue.state))
        self.assertIn("/repos/didericis/bot-bottle/issues/17",
                      m.call_args.args[0].full_url)

    def test_read_issue_tolerates_null_body(self):
        raw = {"number": 17, "title": "T", "body": None, "state": "open"}
        with patch(_URLOPEN, return_value=_resp(raw)):
            self.assertEqual("", GiteaForge(_client()).read_issue(17).body)

    def test_read_comments_maps_user_login(self):
        raw = [
            {"id": 1, "user": {"login": "alice"}, "body": "hi"},
            {"id": 2, "user": {"login": "bob"}, "body": "yo"},
        ]
        with patch(_URLOPEN, return_value=_resp(raw)):
            comments = GiteaForge(_client()).read_comments(17)
        self.assertEqual(["alice", "bob"], [c.user for c in comments])
        self.assertEqual([1, 2], [c.id for c in comments])


class TestForgeWrites(unittest.TestCase):
    def test_post_comment_payload_and_url(self):
        with patch(_URLOPEN, return_value=_resp(None, 201)) as m:
            GiteaForge(_client()).post_comment(17, "done ✓")
        req = m.call_args.args[0]
        self.assertEqual("POST", req.method)
        self.assertIn("/repos/didericis/bot-bottle/issues/17/comments", req.full_url)
        self.assertEqual("done ✓", json.loads(req.data)["body"])

    def test_update_description_patches_issue(self):
        with patch(_URLOPEN, return_value=_resp(None, 200)) as m:
            GiteaForge(_client()).update_description(17, "edited")
        req = m.call_args.args[0]
        self.assertEqual("PATCH", req.method)
        self.assertTrue(req.full_url.endswith("/issues/17"))
        self.assertEqual("edited", json.loads(req.data)["body"])

    def test_auth_header_sent(self):
        with patch(_URLOPEN, return_value=_resp(None, 201)) as m:
            GiteaForge(_client()).post_comment(17, "x")
        self.assertEqual("token test-token",
                         m.call_args.args[0].headers["Authorization"])


class TestPRHelpers(unittest.TestCase):
    def test_get_pr_for_issue_returns_number_when_issue_is_pr(self):
        raw = {"number": 18, "pull_request": {"merged": False}}
        with patch(_URLOPEN, return_value=_resp(raw)):
            self.assertEqual(18, GiteaForge(_client()).get_pr_for_issue(18))

    def test_get_pr_for_issue_none_for_plain_issue(self):
        raw = {"number": 17, "pull_request": None}
        with patch(_URLOPEN, return_value=_resp(raw)):
            self.assertIsNone(GiteaForge(_client()).get_pr_for_issue(17))

    def test_is_pr_open_true_when_state_open(self):
        with patch(_URLOPEN, return_value=_resp({"state": "open"})):
            self.assertTrue(GiteaForge(_client()).is_pr_open(18))

    def test_is_pr_open_false_when_closed(self):
        with patch(_URLOPEN, return_value=_resp({"state": "closed"})):
            self.assertFalse(GiteaForge(_client()).is_pr_open(18))

    def test_read_pr_maps_fields_including_merged(self):
        raw = {"number": 18, "title": "Fix", "body": "patch",
               "state": "closed", "merged": True}
        with patch(_URLOPEN, return_value=_resp(raw)) as m:
            pr = GiteaForge(_client()).read_pr(18)
        self.assertEqual((18, "Fix", "patch", "closed", True),
                         (pr.number, pr.title, pr.body, pr.state, pr.merged))
        self.assertIn("/repos/didericis/bot-bottle/pulls/18",
                      m.call_args.args[0].full_url)

    def test_read_pr_merged_defaults_false(self):
        with patch(_URLOPEN, return_value=_resp({"number": 18, "state": "open"})):
            self.assertFalse(GiteaForge(_client()).read_pr(18).merged)


if __name__ == "__main__":
    unittest.main()