import json

import pytest
from fastapi import HTTPException

from app.dynamic_fields import render_custom_value, validate_raw_value
from app.models import CustomFieldDefinition, CustomFieldValue


def definition(input_type="text", required=False, options=None):
    return CustomFieldDefinition(
        field_key="custom_test", label="测试字段", input_type=input_type,
        is_required=required, is_active=True, is_public=True,
        options_json=json.dumps(options or []), sort_order=0, created_by=1,
    )


def test_required_dynamic_field_rejects_empty_value():
    with pytest.raises(HTTPException) as error:
        validate_raw_value(definition(required=True), None)
    assert error.value.status_code == 422


def test_select_rejects_value_outside_current_options():
    with pytest.raises(HTTPException):
        validate_raw_value(definition("select", options=["A", "B"]), "历史选项")


def test_type_change_preserves_incompatible_raw_value_for_display():
    item = CustomFieldValue(raw_value="High")
    item.definition = definition("number")
    rendered = render_custom_value(item)
    assert rendered["raw_value"] == "High"
    assert rendered["display_value"] == "High"
    assert rendered["compatible"] is False


def test_compatible_number_is_processed_for_display():
    item = CustomFieldValue(raw_value="12.5")
    item.definition = definition("number")
    rendered = render_custom_value(item)
    assert rendered["value"] == 12.5
    assert rendered["compatible"] is True