"""Tests для layout_tz_pdf renderer (Issue #113 PR D).

WeasyPrint requires native GTK/Pango/GObject shared libraries. These are present
in the Docker container (Linux) but absent on Windows dev machines. All tests in
this module are skipped automatically when the native libs are unavailable.
"""

import datetime as dt

import pytest

# Attempt to import the module under test; skip entire module if native libs missing.
try:
    from app.services.exporters.layout_tz_pdf import render_layout_tz_pdf
except (OSError, ImportError) as _e:  # GTK libs missing on Windows, or weasyprint not installed
    pytest.skip(f"WeasyPrint deps missing: {_e}", allow_module_level=True)

from app.schemas.parcel import (
    BestLayoutsResponse,
    LayoutDataQuality,
    LayoutTzMixRow,
    LayoutTzRecommendation,
    TopLayoutRow,
)


def _sample_response() -> BestLayoutsResponse:
    return BestLayoutsResponse(
        top_layouts=[
            TopLayoutRow(
                rank=1,
                room_bucket="1",
                area_bin="25-40",
                signature="1__25-40",
                competitor_obj_ids=[1234, 5678],
                competitor_count=2,
                total_sold_in_window=67,
                velocity_per_month=8.4,
                avg_price_per_m2_rub=148000.0,
                avg_area_m2=38.5,
                supply_units_in_radius=312,
                sold_pct_of_supply=21.5,
            ),
            TopLayoutRow(
                rank=2,
                room_bucket="studio",
                area_bin="<25",
                signature="studio__<25",
                competitor_obj_ids=[1234],
                competitor_count=1,
                total_sold_in_window=40,
                velocity_per_month=5.0,
                avg_price_per_m2_rub=160000.0,
                avg_area_m2=22.0,
                supply_units_in_radius=100,
                sold_pct_of_supply=40.0,
            ),
        ],
        recommendation_for_tz=LayoutTzRecommendation(
            rationale_text="Test rationale текст с кириллицей",
            mix=[
                LayoutTzMixRow(room_bucket="studio", pct=10, abs_units=30, avg_target_area_m2=22.0),
                LayoutTzMixRow(room_bucket="1", pct=60, abs_units=180, avg_target_area_m2=38.5),
                LayoutTzMixRow(room_bucket="2", pct=30, abs_units=90, avg_target_area_m2=55.0),
            ],
            weighted_avg_price_per_m2_rub=152000.0,
            based_on_obj_count=5,
            based_on_total_deals=107,
            data_window_start=dt.date(2026, 2, 1),
            data_window_end=dt.date(2026, 5, 1),
        ),
        data_quality=LayoutDataQuality(
            objects_with_velocity_data=5,
            objects_total_in_radius=8,
            velocity_coverage_pct=62.5,
            confidence="medium",
        ),
    )


def test_pdf_renders_non_empty_bytes() -> None:
    pdf = render_layout_tz_pdf(
        _sample_response(),
        cad_num="66:41:0204016:10",
        radius_km=1.0,
        time_window="last_quarter",
    )
    assert len(pdf) > 1000  # PDF минимум ~1KB


def test_pdf_starts_with_pdf_magic() -> None:
    pdf = render_layout_tz_pdf(
        _sample_response(),
        cad_num="66:41:0204016:10",
        radius_km=1.0,
        time_window="last_quarter",
    )
    assert pdf[:4] == b"%PDF"


def test_pdf_renders_cyrillic_correctly() -> None:
    """Smoke — WeasyPrint должен handle кириллический rationale_text без UnicodeEncodeError."""
    response = _sample_response()
    pdf = render_layout_tz_pdf(
        response,
        cad_num="66:41:0303161:42",
        radius_km=1.5,
        time_window="last_year",
    )
    # Embedded text может быть compressed, но без exception = OK
    assert len(pdf) > 1000


def test_pdf_handles_empty_top_layouts() -> None:
    response = _sample_response()
    response.top_layouts = []
    pdf = render_layout_tz_pdf(
        response,
        cad_num="66:41:0204016:10",
        radius_km=1.0,
        time_window="last_quarter",
    )
    assert pdf[:4] == b"%PDF"


def test_pdf_handles_null_avg_price() -> None:
    """avg_price_per_m2_rub=None (ЖК не покрыт Objective) → должно рендериться как '—'."""
    response = _sample_response()
    response.top_layouts[0].avg_price_per_m2_rub = None
    pdf = render_layout_tz_pdf(
        response,
        cad_num="66:41:0204016:10",
        radius_km=1.0,
        time_window="last_quarter",
    )
    assert pdf[:4] == b"%PDF"
