"""Tests for code suggestions carried by an escalated diagnosis."""

from __future__ import annotations

import json

import pytest

from ariadne.services import hermes_autotriage_decision as decision_module
from ariadne.services import hermes_code_suggestion as module
from ariadne.services import hermes_incident_body as body


SUGGESTION = {
    "path": "ariadne/utils/errors.py",
    "explanation": "safe_error_detail drops the response body, so the assertion never sees it.",
    "code": 'def safe_error_detail(exc):\n    return f"http {exc.response.status_code}: {exc.response.text}"',
}


def _payload(**overrides):
    payload = {
        "incident_id": "ariadne/408",
        "classification": "pytest_test_failure",
        "confidence": 0.9,
        "facts": [],
        "inferences": [],
        "first_failed_gate": "tests",
        "requested_action": None,
        "human_required": True,
        "reason": "a repository test failure",
    }
    payload.update(overrides)
    return payload


def _parse(payload):
    return decision_module.parse_triage_response(json.dumps(payload), "ariadne/408")


def test_a_response_without_the_field_still_validates() -> None:
    """Responses written before the field existed must keep parsing."""

    outcome = _parse(_payload())

    assert outcome.valid
    assert outcome.decision.code_suggestions == []


def test_suggestions_are_parsed() -> None:
    outcome = _parse(_payload(code_suggestions=[dict(SUGGESTION)]))

    suggestion = outcome.decision.code_suggestions[0]
    assert suggestion.path == "ariadne/utils/errors.py"
    assert "drops the response body" in suggestion.explanation
    assert "def safe_error_detail" in suggestion.code


def test_a_null_field_is_accepted() -> None:
    assert _parse(_payload(code_suggestions=None)).decision.code_suggestions == []


@pytest.mark.parametrize(
    ("suggestions", "expected"),
    [
        ("nope", "must be a list or null"),
        ([dict(SUGGESTION)] * 4, "at most 3 suggestions"),
        (["not-an-object"], "[0] must be an object"),
        ([{"path": "a"}], "[0] must have exactly path, explanation, code"),
        ([{**SUGGESTION, "code": "  "}], "[0] code must be a non-empty string"),
        ([{**SUGGESTION, "path": 7}], "[0] path must be a non-empty string"),
    ],
)
def test_a_malformed_field_is_rejected(suggestions, expected) -> None:
    outcome = _parse(_payload(code_suggestions=suggestions))

    assert not outcome.valid
    assert expected in outcome.reject_reason


def test_a_long_suggestion_is_clipped() -> None:
    outcome = _parse(
        _payload(code_suggestions=[{**SUGGESTION, "code": "x" * 5000, "explanation": "y " * 900}])
    )

    suggestion = outcome.decision.code_suggestions[0]
    assert len(suggestion.code) <= 1700
    assert len(suggestion.explanation) <= 700


def test_a_suggestion_never_becomes_an_action() -> None:
    """It is advice in an issue; the gates must not see it as anything else."""

    outcome = _parse(_payload(code_suggestions=[dict(SUGGESTION)], human_required=False))
    allowed, reason = decision_module.authorize_action(
        outcome,
        {
            "allowed_actions": ["retry_transient_infra"],
            "action_classifications": {"pytest_test_failure": "retry_transient_infra"},
            "autoremediation_enabled": True,
            "min_confidence": 0.5,
        },
        prior_action_count=0,
        build_is_terminal_failure=True,
        job_allowlisted=True,
        evidence_has_signature=True,
    )

    assert not allowed
    assert reason == "requested_action_missing"


def test_the_issue_section_says_the_change_was_not_applied() -> None:
    """A code block in an issue reads as a change that was made."""

    section = module.issue_section(module.from_payload({"code_suggestions": [dict(SUGGESTION)]}))

    assert "## Suggested fix (not applied)" in section
    assert "not written, validated, or pushed anywhere" in section
    assert "**`ariadne/utils/errors.py`**" in section
    assert section.count("```") == 2
    assert module.issue_section(None) == ""
    assert module.issue_section([]) == ""


def test_a_fence_inside_a_suggestion_cannot_break_the_block() -> None:
    section = module.issue_section(
        module.from_payload({"code_suggestions": [{**SUGGESTION, "code": "a\n```\nb"}]})
    )

    assert section.count("```") == 2


def test_the_detail_recorded_for_the_audit_trail() -> None:
    detail = module.as_detail(module.from_payload({"code_suggestions": [dict(SUGGESTION)]}))

    assert detail[0]["path"] == "ariadne/utils/errors.py"
    assert module.as_detail(None) == []


def test_from_payload_tolerates_junk() -> None:
    assert module.from_payload({}) == []
    assert module.from_payload({"code_suggestions": "nope"}) == []
    assert module.from_payload({"code_suggestions": ["x"]}) == []


def test_the_issue_body_carries_the_suggestion_and_keeps_its_marker() -> None:
    rendered = body.issue_body(
        {
            "incident_id": "ariadne/408",
            "job": "ariadne",
            "build_number": 408,
            "classification": "pytest_test_failure",
            "reason": "a repository test failure",
            "run_id": "run-1",
            "code_suggestions": module.from_payload({"code_suggestions": [dict(SUGGESTION)]}),
        }
    )

    assert "## Suggested fix (not applied)" in rendered
    assert "def safe_error_detail" in rendered
    assert rendered.index("Suggested fix") < rendered.index("## Links")
    assert rendered.rstrip().endswith("-->")


def test_the_prompt_asks_for_suggestions_without_promising_to_apply_them() -> None:
    from ariadne.services import hermes_triage_prompt

    prompt = hermes_triage_prompt.build_prompt("ariadne/408", "ariadne", {})

    assert '"code_suggestions": <array or null>' in prompt
    assert "at most three" in prompt
    assert "nothing you put here is applied" in prompt
    assert "prefer correcting the code under test" in prompt