"""issue #15 — density/readability gate 테스트 (Gitea #98 추천 1·2).

계약:
  - payload 결정론 + 측정 높이만 사용 (final.html 영향 0 — 리포팅 계층)
  - 임계값은 mdx 01~05 실측 캘리브레이션: dense<16 / tight<45 px/line
    (사람 판정 정렬: mdx03 105.8=ready, mdx02 40~44=cramped, mdx01 11.5=dense)
  - dense/tight 는 design_readiness 의 warnings(needs_review) — not_ready 아님
  - presentation_ready 는 density 실패 시 False (#98 추천 1: 신호 통합)
"""
from __future__ import annotations

from src.phase_z2_pipeline import (
    _compute_density_gate,
    _compute_design_readiness,
    _estimate_max_card_lines,
)


def _overflow(heights: dict[str, int]) -> dict:
    return {"passed": True, "zones": [
        {"position": p, "clientHeight": h} for p, h in heights.items()
    ]}


# ── _estimate_max_card_lines ────────────────────────────────────────


def test_repeat_slot_pattern_lines():
    payload = {
        "title": "t", "_slot_count": 3,
        "pill_1_label": "라벨", "pill_1_body": ["a", "b", "c"],
        "pill_2_label": "라벨", "pill_2_body": ["a"],
        "pill_3_label": "", "pill_3_body": [],
    }
    # pill_1: label 1 + body 3 = 4
    assert _estimate_max_card_lines(payload) == 4


def test_list_of_dict_columns_lines():
    payload = {"pillars": [
        {"label": "A", "lines": ["1", "2", "3"]},
        {"label": "B", "lines": ["1"]},
    ]}
    assert _estimate_max_card_lines(payload) == 4  # label 1 + 3 lines


def test_br_joined_string_lines():
    payload = {"row_1_body": "가<br>나<br>다"}
    assert _estimate_max_card_lines(payload) == 3


def test_non_card_payload_not_measurable():
    assert _estimate_max_card_lines({"title": "t", "body_text": "x"}) == 0


# ── _compute_density_gate (실측 캘리브레이션 fixture) ─────────────────


def _zone(pos: str, payload: dict, template="three_persona_benefits") -> dict:
    return {"position": pos, "template_id": template, "slot_payload": payload}


def test_mdx03_calibration_comfortable():
    """mdx03 left: 585px, pillar 최대 5라인 → 105.8px/line = comfortable."""
    zones = [_zone("left", {"pillars": [
        {"label": "L", "lines": ["1", "2", "3", "4"]},
    ]})]
    gate = _compute_density_gate(zones, _overflow({"left": 585}))
    assert gate["passed"] is True
    assert gate["zones"][0]["verdict"] == "comfortable"
    assert gate["zones"][0]["px_per_line"] == 105.8


def test_mdx02_calibration_tight():
    """mdx02 bottom: 339px, intro 7라인 → 40.4px/line = tight (사람: cramped)."""
    zones = [_zone("bottom", {"intro_sections": [
        {"label": "a", "lines": ["1", "2", "3", "4", "5", "6"]},  # 7 lines
        {"label": "b", "lines": ["1", "2"]},
    ]})]
    gate = _compute_density_gate(zones, _overflow({"bottom": 339}))
    assert gate["passed"] is False
    assert gate["worst_verdict"] == "tight"
    assert gate["zones"][0]["px_per_line"] == 40.4


def test_mdx01_calibration_dense():
    """mdx01 bottom-right: 286px 표 20라인 → 11.5px/line = dense
    (#98 사람 판정 'bottom comparison dense')."""
    zones = [_zone("bottom-right", {"rows": [
        {"cell": "<br>".join(str(i) for i in range(20))},
    ]}, template="bim_dx_comparison_table")]
    gate = _compute_density_gate(zones, _overflow({"bottom-right": 286}))
    assert gate["worst_verdict"] == "dense"
    assert gate["zones"][0]["px_per_line"] == 11.5


def test_unmeasurable_zone_does_not_fail_gate():
    zones = [_zone("top", {"title": "only-title"})]
    gate = _compute_density_gate(zones, _overflow({"top": 300}))
    assert gate["passed"] is True
    assert gate["zones"][0]["verdict"] == "not_measurable"


def test_missing_height_not_measurable():
    zones = [_zone("top", {"pill_1_label": "L", "pill_1_body": ["a"]})]
    gate = _compute_density_gate(zones, _overflow({}))
    assert gate["zones"][0]["verdict"] == "not_measurable"
    assert gate["passed"] is True


# ── design_readiness 통합 ────────────────────────────────────────────


def _readiness(density_gate):
    return _compute_design_readiness(
        units=[],
        rendered_text_coverage={"passed": True},
        applied_render_consistency={"passed": True},
        density_gate=density_gate,
    )


def test_tight_zone_downgrades_to_needs_review():
    gate = {"passed": False, "zones": [
        {"position": "bottom", "template_id": "t", "verdict": "tight",
         "px_per_line": 40.4, "estimated_max_lines": 7, "zone_height_px": 339},
    ]}
    r = _readiness(gate)
    assert r["status"] == "needs_review"  # not_ready 아님 (사람 판정 정렬)
    assert any(w["code"] == "density_tight" for w in r["warnings"])


def test_dense_zone_also_needs_review_not_not_ready():
    gate = {"passed": False, "zones": [
        {"position": "br", "template_id": "t", "verdict": "dense",
         "px_per_line": 11.5, "estimated_max_lines": 20, "zone_height_px": 286},
    ]}
    r = _readiness(gate)
    assert r["status"] == "needs_review"
    assert any(w["code"] == "density_dense" for w in r["warnings"])


def test_comfortable_gate_keeps_ready():
    gate = {"passed": True, "zones": [
        {"position": "left", "verdict": "comfortable"},
    ]}
    r = _readiness(gate)
    assert r["status"] == "ready"


def test_density_gate_none_backward_compat():
    r = _compute_design_readiness(
        units=[],
        rendered_text_coverage={"passed": True},
        applied_render_consistency={"passed": True},
    )
    assert r["status"] == "ready"