"""Tests covering the security fixes made in this session.

Each test class is named after the fix it verifies:

  - TestB104ConfigHttpsValidator  : 0.0.0.0 no longer exempt from HTTPS check
  - TestBuildCommentBodyRefactor   : list+join rewrite preserves all output
  - TestDiscoverDropdownRefactor   : list+join rewrite produces correct HTML
  - TestRequestsTimeouts           : all HTTP calls in hf.py carry explicit timeouts
"""
import importlib
import json
import re
from unittest.mock import AsyncMock, MagicMock, patch

import pytest


# ── B104: AI_EXPLAINER_BASE_URL validator ────────────────────────────────────

class TestB104ConfigHttpsValidator:
    """AI_EXPLAINER_BASE_URL must reject http:// for non-localhost hosts.

    Previously 0.0.0.0 was in the localhost allowlist, which bandit (B104)
    flagged as 'binding to all interfaces'. The fix removes 0.0.0.0 from the
    allowlist so that http://0.0.0.0:... is treated as a remote URL and
    rejected.
    """

    def _make_settings(self, url: str):
        """Import Settings fresh so environment doesn't pollute the test."""
        import importlib
        import sentinel.config as cfg_mod
        importlib.reload(cfg_mod)
        from pydantic_settings import BaseSettings
        return cfg_mod.Settings(
            AI_EXPLAINER_BASE_URL=url,
            DATABASE_URL="sqlite+aiosqlite:////tmp/test.db",
            DATA_DIR="/tmp",
        )

    def test_localhost_http_allowed(self):
        s = self._make_settings("http://localhost:11434")
        assert s.AI_EXPLAINER_BASE_URL == "http://localhost:11434"

    def test_loopback_ip_http_allowed(self):
        s = self._make_settings("http://127.0.0.1:11434")
        assert s.AI_EXPLAINER_BASE_URL == "http://127.0.0.1:11434"

    def test_ipv6_loopback_http_allowed(self):
        s = self._make_settings("http://[::1]:11434")
        assert s.AI_EXPLAINER_BASE_URL == "http://[::1]:11434"

    def test_https_remote_allowed(self):
        s = self._make_settings("https://ollama.example.com")
        assert s.AI_EXPLAINER_BASE_URL == "https://ollama.example.com"

    def test_http_remote_rejected(self):
        from pydantic import ValidationError
        with pytest.raises((ValidationError, ValueError)):
            self._make_settings("http://ollama.example.com")

    def test_bind_all_0000_now_rejected(self):
        """0.0.0.0 is NOT a loopback address — it must be rejected for http://."""
        from pydantic import ValidationError
        with pytest.raises((ValidationError, ValueError)):
            self._make_settings("http://0.0.0.0:11434")


# ── _build_comment_body: list+join refactor correctness ─────────────────────

class TestBuildCommentBodyRefactor:
    """Verify the list+join rewrite produces the same output as the old body+=.

    The performance fix changed string concatenation inside the per-finding
    loop to list accumulation + ''.join() at the end.  All existing content
    invariants must still hold.
    """

    def _finding(self, **kwargs) -> dict:
        defaults = dict(
            file="app.py", line=10, confidence="likely",
            message="Shell injection found", remediation="Use subprocess.run",
        )
        defaults.update(kwargs)
        return defaults

    def _body(self, findings):
        from core.hf import _build_comment_body
        return _build_comment_body(findings)

    def test_returns_string(self):
        assert isinstance(self._body([self._finding()]), str)

    def test_header_present(self):
        assert "security scan findings" in self._body([self._finding()])

    def test_details_block_present(self):
        body = self._body([self._finding()])
        assert "<details>" in body
        assert "</details>" in body

    def test_file_path_in_output(self):
        assert "src/auth.py" in self._body([self._finding(file="src/auth.py")])

    def test_message_in_output(self):
        assert "Hardcoded secret" in self._body([self._finding(message="Hardcoded secret")])

    def test_line_number_formatted(self):
        assert "L99" in self._body([self._finding(line=99)])

    def test_remediation_included(self):
        body = self._body([self._finding(remediation="Upgrade to >=2.0")])
        assert "Fix:" in body
        assert "Upgrade to" in body

    def test_empty_remediation_not_rendered(self):
        assert "Fix:" not in self._body([self._finding(remediation="")])

    def test_confidence_uppercased(self):
        assert "CONFIRMED" in self._body([self._finding(confidence="confirmed")])

    def test_finding_count_in_summary(self):
        f = [self._finding(), self._finding(line=20, file="b.py")]
        body = self._body(f)
        assert "2" in body

    def test_groups_by_file(self):
        f = [
            self._finding(file="a.py", line=1),
            self._finding(file="a.py", line=5),
            self._finding(file="b.py", line=3),
        ]
        body = self._body(f)
        assert "a.py" in body
        assert "b.py" in body

    def test_large_finding_list_is_efficient(self):
        """100 findings across 10 files must complete quickly (list+join is O(n))."""
        import time
        findings = [
            self._finding(file=f"file{i % 10}.py", line=i, message=f"msg {i}")
            for i in range(100)
        ]
        t0 = time.monotonic()
        body = self._body(findings)
        elapsed = time.monotonic() - t0
        assert elapsed < 1.0, f"_build_comment_body took {elapsed:.3f}s for 100 findings"
        assert "file0.py" in body


# ── discover.py quicksearch dropdown: list+join refactor correctness ─────────

class TestDiscoverDropdownRefactor:
    """Verify the quicksearch dropdown HTML builder uses list+join correctly.

    The quicksearch_dropdown route built items_html via += in a loop (O(n²)).
    The fix extracts the logic into _build_dropdown_html() which collects items
    in a list and joins at the end.  Content must be correct.
    """

    def _html(self, spaces=None, users=None) -> str:
        from sentinel.routes.discover import _build_dropdown_html
        return _build_dropdown_html(
            spaces=spaces or [],
            users=users or [],
        )

    def test_space_id_appears_in_html(self):
        html = self._html(spaces=[{"id": "owner/cool-space"}])
        assert "owner/cool-space" in html

    def test_user_appears_in_html(self):
        html = self._html(users=[{"user": "alice"}])
        assert "alice" in html

    def test_empty_user_entry_skipped(self):
        html = self._html(users=[{"user": ""}, {"user": None}, {"user": "bob"}])
        assert html.count("<li") == 1
        assert "bob" in html

    def test_user_fullname_fallback(self):
        html = self._html(users=[{"fullname": "Charlie"}])
        assert "Charlie" in html

    def test_empty_inputs_return_empty_string(self):
        assert self._html() == ""

    def test_space_li_has_type_label(self):
        html = self._html(spaces=[{"id": "a/b"}])
        assert "space" in html

    def test_user_li_has_type_label(self):
        html = self._html(users=[{"user": "alice"}])
        assert "user" in html

    def test_multiple_spaces_all_included(self):
        spaces = [{"id": f"owner/space{i}"} for i in range(4)]
        html = self._html(spaces=spaces)
        assert html.count("<li") == 4

    def test_html_special_chars_escaped(self):
        """Space IDs with HTML special chars must be escaped."""
        html = self._html(spaces=[{"id": "<script>alert(1)</script>"}])
        assert "<script>" not in html

    def test_returns_string(self):
        assert isinstance(self._html(spaces=[{"id": "a/b"}]), str)


# ── HTTP requests in hf.py carry explicit timeouts ───────────────────────────

class TestRequestsTimeouts:
    """All requests.get/post calls in core/hf.py must pass an explicit timeout.

    These are false positives for the semgrep requests-no-timeout rule because
    timeout kwargs are present, but we keep regression tests so the timeouts
    are never accidentally removed.
    """

    def _mock_resp(self, status=200, data=None):
        m = MagicMock()
        m.status_code = status
        m.json.return_value = data or []
        m.text = ""
        return m

    def test_list_user_spaces_passes_timeout(self):
        from core.hf import list_user_spaces
        with patch("core.hf.requests.get", return_value=self._mock_resp()) as mock_get:
            list_user_spaces("testuser")
        kwargs = mock_get.call_args[1]
        assert "timeout" in kwargs, "list_user_spaces must pass timeout= to requests.get"
        assert isinstance(kwargs["timeout"], (int, float))

    def test_comment_on_space_passes_timeout(self):
        from core.hf import comment_on_space
        finding = dict(
            file="f.py", line=1, severity="HIGH", confidence="confirmed",
            message="test", remediation="fix",
        )
        with patch("core.hf.requests.post", return_value=self._mock_resp(201)) as mock_post:
            comment_on_space(
                "https://huggingface.co/spaces/ns/repo",
                "token123",
                [finding],
            )
        kwargs = mock_post.call_args[1]
        assert "timeout" in kwargs, "comment_on_space must pass timeout= to requests.post"
        assert isinstance(kwargs["timeout"], (int, float))