"""구간형 기준점·옵션 phase — 스키마 확장 (PLAN 2026-08-17 컨테이너 병합 1단계).

사용자 확정: 점형 = 기준 측점이 마킹 위치. 구간형 = **기준점에 마킹** + 시작·종료 측점.
기존 스키마는 구간형에 chainage_m을 금지하고 start_m에 마킹했다 — 기준점을 허용하고
시작≤기준≤종료를 검증한다. 기존 저장분(기준점 없음)은 start_m으로 채운다(하위 호환).
"""

import pytest
from pydantic import ValidationError

from B05_Profile.B05_Profile_Structures_Schema import (
    StructureInstance,
    StructureOptionField,
)


def _interval(**overrides):
    data = {
        "type_id": "ditch_side",
        "placement": "interval",
        "start_m": 100.0,
        "end_m": 140.0,
        "options": {},
    }
    data.update(overrides)
    return StructureInstance.model_validate(data)


# ── 구간형 기준점 ───────────────────────────────────────────────────────────


def test_interval_accepts_anchor_within_span():
    item = _interval(chainage_m=115.0)
    assert item.chainage_m == 115.0
    assert item.anchor_m() == 115.0


def test_interval_without_anchor_defaults_to_start():
    """기존 저장분(기준점 없음) — start_m이 기준점이 된다 (하위 호환)."""
    item = _interval()
    assert item.chainage_m == 100.0
    assert item.anchor_m() == 100.0


def test_interval_anchor_outside_span_is_rejected():
    with pytest.raises(ValidationError, match="기준점"):
        _interval(chainage_m=90.0)
    with pytest.raises(ValidationError, match="기준점"):
        _interval(chainage_m=141.0)


def test_interval_anchor_at_boundaries_is_accepted():
    assert _interval(chainage_m=100.0).anchor_m() == 100.0
    assert _interval(chainage_m=140.0).anchor_m() == 140.0


def test_interval_still_requires_ordered_span():
    with pytest.raises(ValidationError):
        _interval(start_m=140.0, end_m=100.0)
    with pytest.raises(ValidationError):
        _interval(start_m=100.0, end_m=None)


# ── 점형·부지형은 기존 규칙 유지 ────────────────────────────────────────────


def test_point_still_rejects_span_fields():
    with pytest.raises(ValidationError):
        StructureInstance.model_validate(
            {
                "type_id": "erosion_check",
                "placement": "point",
                "chainage_m": 50.0,
                "start_m": 40.0,
                "end_m": 60.0,
                "options": {},
            }
        )


def test_point_anchor_is_chainage():
    item = StructureInstance.model_validate(
        {"type_id": "erosion_check", "placement": "point", "chainage_m": 50.0, "options": {}}
    )
    assert item.anchor_m() == 50.0


# ── 옵션 phase — B05(배치) / detail(B06·B07 상세) ──────────────────────────


def test_option_phase_defaults_to_b05():
    field = StructureOptionField.model_validate(
        {"key": "form", "label": "형식", "input": "select", "choices": ["A"]}
    )
    assert field.phase == "b05"


def test_option_phase_detail_roundtrip():
    field = StructureOptionField.model_validate(
        {
            "key": "height_m",
            "label": "높이",
            "input": "number",
            "required": True,
            "phase": "detail",
        }
    )
    assert field.phase == "detail" and field.required is True


def test_option_phase_rejects_unknown_value():
    with pytest.raises(ValidationError):
        StructureOptionField.model_validate(
            {"key": "x", "label": "x", "input": "text", "phase": "b07"}
        )