"""Validation tests for the structured content schema models."""

from __future__ import annotations

import pytest
from pydantic import ValidationError
from roboco.foundation.policy.content import (
    AuditorNote,
    ContentValidationError,
    DeveloperNote,
    DocNote,
    Finding,
    PmReviewContent,
    PrReviewContent,
    QaNote,
    ResumptionNote,
    TaskDescription,
    validate_content,
    validate_findings,
)
from roboco.foundation.policy.content.enums import Severity, Verdict
from roboco.foundation.policy.content.models import CONTENT_MODELS

# --------------------------------------------------------------------------- #
# Valid construction
# --------------------------------------------------------------------------- #


def test_pr_review_valid() -> None:
    c = PrReviewContent.model_validate(
        {
            "summary": "The change is correct and covered by tests.",
            "findings": [
                {
                    "file": "roboco/services/git.py",
                    "line": 42,
                    "severity": "major",
                    "expected": "raises on 422",
                    "actual": "swallows the error",
                }
            ],
            "verdict": "changes_requested",
        }
    )
    assert c.findings[0].severity is Severity.MAJOR
    assert c.verdict is Verdict.CHANGES_REQUESTED


def test_qa_valid() -> None:
    c = QaNote.model_validate(
        {
            "summary": "Reviewed all acceptance criteria against the diff.",
            "ac_verdicts": [
                {
                    "criterion": "AC1 returns 400",
                    "status": "verified",
                    "how": "test passes",
                }
            ],
            "verdict": "passed",
        }
    )
    assert c.ac_verdicts[0].status == "verified"


def test_task_description_valid() -> None:
    c = TaskDescription.model_validate(
        {
            "objective": "Add a structured PR-review comment format.",
            "what_this_builds": ["a reviewer schema"],
            "the_work": [
                {
                    "team": "backend",
                    "summary": "schema + gateway",
                    "items": ["model", "verb"],
                }
            ],
            "acceptance_criteria": ["reviewer notes land in their own slot"],
        }
    )
    assert c.the_work[0].team.value == "backend"


def test_resumption_valid() -> None:
    c = ResumptionNote(
        done="schema landed", next="wire the gateway", where_to_look=["models.py"]
    )
    assert c.next == "wire the gateway"


# --------------------------------------------------------------------------- #
# Rejection
# --------------------------------------------------------------------------- #


def test_validate_content_unknown_type() -> None:
    with pytest.raises(ContentValidationError) as exc:
        validate_content("nonsense", {})
    assert exc.value.field == "content_type"


def test_pr_review_missing_summary_rejected() -> None:
    with pytest.raises(ContentValidationError) as exc:
        validate_content("pr_review", {"verdict": "approved"})
    assert exc.value.field == "summary"


def test_pr_review_trivial_summary_rejected() -> None:
    with pytest.raises(ContentValidationError):
        validate_content("pr_review", {"summary": "wip", "verdict": "approved"})


def test_pr_review_negative_verdict_allows_summary_only() -> None:
    # A reviewer can fail on a summary alone (e.g. "CI is red"); findings are
    # format-enforced (file/line/expected/actual) when present, not mandatory.
    c = validate_content(
        "pr_review",
        {
            "summary": "CI is red on this PR; the failing job blocks merge.",
            "verdict": "failed",
            "findings": [],
        },
    )
    assert isinstance(c, PrReviewContent)
    assert c.verdict.value == "failed"


def test_pr_review_approved_allows_empty_findings() -> None:
    c = validate_content(
        "pr_review",
        {"summary": "All criteria met, nothing to change.", "verdict": "approved"},
    )
    assert isinstance(c, PrReviewContent)


def test_qa_verdict_must_be_pass_or_fail() -> None:
    with pytest.raises(ContentValidationError) as exc:
        validate_content(
            "qa",
            {
                "summary": "Reviewed the acceptance criteria thoroughly.",
                "ac_verdicts": [
                    {"criterion": "c", "status": "verified", "how": "test"}
                ],
                "verdict": "approved",
            },
        )
    assert exc.value.field == "verdict"


def test_qa_allows_empty_ac_verdicts() -> None:
    # ac_verdicts is optional (a QA fail can be summary-only); the verb's
    # coverage gate enforces per-criterion verdicts for a pass.
    c = validate_content(
        "qa",
        {
            "summary": "Reviewed everything carefully here.",
            "ac_verdicts": [],
            "verdict": "failed",
        },
    )
    assert isinstance(c, QaNote)
    assert c.ac_verdicts == []


def test_task_description_requires_work() -> None:
    with pytest.raises(ContentValidationError) as exc:
        validate_content(
            "task_description",
            {
                "objective": "Build the thing properly.",
                "the_work": [],
                "acceptance_criteria": ["x"],
            },
        )
    assert exc.value.field == "the_work"


def test_work_unit_rejects_non_cell_team() -> None:
    with pytest.raises(ContentValidationError):
        validate_content(
            "task_description",
            {
                "objective": "Build the thing properly.",
                "the_work": [{"team": "board", "summary": "do it", "items": ["a"]}],
                "acceptance_criteria": ["x"],
            },
        )


# --------------------------------------------------------------------------- #
# Graceful coercion (lone scalar -> one-element list)
# --------------------------------------------------------------------------- #


def test_findings_single_dict_coerced_to_list() -> None:
    c = validate_content(
        "pr_review",
        {
            "summary": "One finding passed as a bare dict.",
            "verdict": "changes_requested",
            "findings": {
                "file": "a.py",
                "severity": "nit",
                "expected": "trailing newline",
                "actual": "no newline",
            },
        },
    )
    assert isinstance(c, PrReviewContent)
    assert len(c.findings) == 1


def test_pr_review_issues_carry_free_text_change_requests() -> None:
    # The in-path gate fails on free-text issues (not structured Finding
    # objects, which require file/severity/expected/actual). Those issues now
    # land in the additive `issues` slot instead of being flattened into the
    # summary string alone — so a reader of notes_structured.pr_review gets the
    # concrete change-requests, and the rendered TEXT mirror gains an Issues
    # section.
    c = validate_content(
        "pr_review",
        {
            "summary": "PR review needs changes before this can merge.",
            "verdict": "changes_requested",
            "issues": ["seam mismatch on the rebase path", "docs lag the diff"],
        },
    )
    assert isinstance(c, PrReviewContent)
    assert c.issues == ["seam mismatch on the rebase path", "docs lag the diff"]
    rendered = c.render_markdown()
    assert "## Issues" in rendered
    assert "seam mismatch on the rebase path" in rendered
    assert "docs lag the diff" in rendered


def test_pr_review_issues_default_empty_and_single_scalar_coerced() -> None:
    c = validate_content(
        "pr_review",
        {"summary": "Clean PR, no free-text issues to raise.", "verdict": "approved"},
    )
    assert isinstance(c, PrReviewContent)
    assert c.issues == []
    assert "## Issues" not in c.render_markdown()

    coerced = validate_content(
        "pr_review",
        {
            "summary": "One free-text issue passed as a bare string here.",
            "verdict": "changes_requested",
            "issues": "lone issue string",
        },
    )
    assert isinstance(coerced, PrReviewContent)
    assert coerced.issues == ["lone issue string"]


def test_where_to_look_single_string_coerced() -> None:
    c = validate_content(
        "resumption",
        {
            "done": "did the thing",
            "next": "do next thing",
            "where_to_look": "models.py",
        },
    )
    assert isinstance(c, ResumptionNote)
    assert c.where_to_look == ["models.py"]


def test_developer_and_doc_and_auditor_models() -> None:
    assert isinstance(
        validate_content("developer", {"summary": "Implemented the schema layer."}),
        DeveloperNote,
    )
    assert isinstance(
        validate_content("doc", {"summary": "Documented the new endpoints."}), DocNote
    )
    assert isinstance(
        validate_content(
            "auditor", {"summary": "No concerns with this change.", "severity": "info"}
        ),
        AuditorNote,
    )


# --------------------------------------------------------------------------- #
# Finding — revision-findings ledger caps (fix / evidence / file-relative)
# --------------------------------------------------------------------------- #

_FINDING_TEXT_CAP = 300


def _finding(**overrides: object) -> dict[str, object]:
    base: dict[str, object] = {
        "file": "roboco/services/task.py",
        "line": 42,
        "severity": "major",
        "expected": "raises on invalid input",
        "actual": "swallows the error silently",
    }
    base.update(overrides)
    return base


def test_finding_accepts_fix_and_evidence() -> None:
    f = Finding.model_validate(
        _finding(
            fix="raise ValueError instead", evidence="Traceback: ...\nAssertionError"
        )
    )
    assert f.fix == "raise ValueError instead"
    assert f.evidence is not None
    assert f.evidence.startswith("Traceback")


def test_finding_file_is_optional() -> None:
    f = Finding.model_validate(_finding(file=None))
    assert f.file is None


def test_finding_rejects_absolute_unix_path() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(file="/etc/passwd"))


def test_finding_rejects_absolute_windows_path() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(file="C:\\Windows\\system32"))


def test_finding_rejects_dotdot_traversal_path() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(file="a/../../etc/passwd"))


def test_finding_rejects_dotdot_leading_segment() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(file="../roboco/services/task.py"))


def test_finding_accepts_dot_segment_and_double_dot_substring() -> None:
    # A literal ".." SEGMENT is rejected, but a filename merely containing
    # dots (not a traversal component) must not false-positive.
    ok = Finding.model_validate(_finding(file="./roboco/services/foo..bar.py"))
    assert ok.file == "./roboco/services/foo..bar.py"


def test_finding_rejects_prose_file_with_spaces() -> None:
    # Live bug: a finding's `file` carried a PR reference ("PR #676
    # description") instead of a path — it validated, and the panel then
    # tried (and failed) to fetch a git blob literally named that.
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(file="PR #676 description"))
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(file="the description in the PR"))


def test_finding_accepts_real_nested_path() -> None:
    ok = Finding.model_validate(
        _finding(file="roboco/services/gateway/choreographer/findings.py")
    )
    assert ok.file == "roboco/services/gateway/choreographer/findings.py"


def test_finding_accepts_nextjs_route_group_and_dynamic_segment_paths() -> None:
    # This repo's own tracked tree uses parens (route groups) and brackets
    # (dynamic segments) in real, common paths — the shape gate must not
    # reject them.
    ok = Finding.model_validate(
        _finding(file="panel/src/app/(dashboard)/tasks/[taskId]/page.tsx")
    )
    assert ok.file == "panel/src/app/(dashboard)/tasks/[taskId]/page.tsx"


def test_finding_accepts_client_repo_path_conventions() -> None:
    # Findings reference paths in arbitrary reviewed projects, not just this
    # repo: SvelteKit route files (+), @types dirs and @2x assets (@) are
    # real, common tracked paths a reviewer must be able to cite.
    for path in (
        "src/routes/+page.svelte",
        "src/@types/foo.d.ts",
        "assets/logo@2x.png",
    ):
        ok = Finding.model_validate(_finding(file=path))
        assert ok.file == path


def test_finding_file_none_bypasses_the_shape_gate() -> None:
    f = Finding.model_validate(_finding(file=None))
    assert f.file is None


def test_finding_rejects_non_positive_line() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(line=0))
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(line=-1))


def test_finding_expected_actual_cap_at_300() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(expected="x" * (_FINDING_TEXT_CAP + 1)))
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(actual="x" * (_FINDING_TEXT_CAP + 1)))
    # exactly at the cap is fine
    ok = Finding.model_validate(_finding(expected="x" * _FINDING_TEXT_CAP))
    assert len(ok.expected) == _FINDING_TEXT_CAP


def test_finding_fix_cap_at_500() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(fix="x" * 501))


def test_finding_evidence_cap_at_2000() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(evidence="x" * 2001))


def test_finding_file_cap_at_300() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(file="a/" * 200 + "f.py"))


def test_finding_rejects_placeholder_fix() -> None:
    with pytest.raises(ValidationError):
        Finding.model_validate(_finding(fix="tbd"))


# --------------------------------------------------------------------------- #
# validate_findings — the ledger's raw list[dict] -> list[Finding] entry point
# --------------------------------------------------------------------------- #

_EXPECTED_TWO_FINDINGS = 2


def test_validate_findings_returns_typed_list() -> None:
    findings = validate_findings([_finding(), _finding(file=None, line=None)])
    assert len(findings) == _EXPECTED_TWO_FINDINGS
    assert all(isinstance(f, Finding) for f in findings)
    assert findings[1].file is None


def test_validate_findings_passes_through_existing_finding_instances() -> None:
    f = Finding.model_validate(_finding())
    assert validate_findings([f]) == [f]


def test_validate_findings_raises_content_validation_error() -> None:
    with pytest.raises(ContentValidationError):
        validate_findings([_finding(severity="catastrophic")])


# --------------------------------------------------------------------------- #
# QaNote.findings — parity with PrReviewContent.findings
# --------------------------------------------------------------------------- #


def test_qa_note_accepts_findings() -> None:
    c = QaNote.model_validate(
        {
            "summary": "[F-abc12345] task.py:42 (major) — expected → actual",
            "findings": [_finding()],
            "verdict": "failed",
        }
    )
    assert len(c.findings) == 1
    assert c.findings[0].severity is Severity.MAJOR
    # QaNote deliberately does not re-render findings into their own section
    # (summary already carries the deterministic per-finding rendering) —
    # avoids the double-rendering the PR-gate summary explicitly avoids.
    rendered = c.render_markdown()
    assert "## Findings" not in rendered


def test_qa_note_findings_default_empty() -> None:
    c = QaNote.model_validate(
        {"summary": "Everything checked out fine.", "verdict": "passed"}
    )
    assert c.findings == []


# --------------------------------------------------------------------------- #
# PmReviewContent — the request_changes note (no verdict field)
# --------------------------------------------------------------------------- #


def test_pm_review_content_valid() -> None:
    c = validate_content(
        "pm_review",
        {
            "summary": "[F-abc12345] file.py:10 (major) — expected → actual",
            "findings": [_finding()],
        },
    )
    assert isinstance(c, PmReviewContent)
    assert len(c.findings) == 1
    assert c.render_markdown() == "## Summary\n" + c.summary


def test_pm_review_content_rejects_trivial_summary() -> None:
    with pytest.raises(ContentValidationError):
        validate_content("pm_review", {"summary": "wip"})


def test_pm_review_content_registered_in_content_models() -> None:
    assert CONTENT_MODELS["pm_review"] is PmReviewContent