import pytest
from fastapi import HTTPException

from app.services.pl_plan_service import (
    DRAFTABLE_FOLLOW_STATUSES,
    assert_can_save_as_draft,
    resolve_follow_status_on_save,
    validate_draft_min_fields,
)


def test_validate_draft_min_fields_requires_belongs_company():
    with pytest.raises(HTTPException) as exc:
        validate_draft_min_fields(belongs_company="", create_date=None)
    assert exc.value.status_code == 422
    assert "归属公司" in str(exc.value.detail)


def test_validate_draft_min_fields_allows_missing_create_date():
    validate_draft_min_fields(belongs_company="shanxia", create_date=None)


def test_resolve_follow_status_draft_always_drafting():
    assert (
        resolve_follow_status_on_save(
            save_mode="draft", current="pending_arrange", is_create=False
        )
        == "drafting"
    )
    assert resolve_follow_status_on_save(save_mode="draft", current=None, is_create=True) == "drafting"


def test_resolve_follow_status_formal_promotes_drafting():
    assert (
        resolve_follow_status_on_save(save_mode="formal", current=None, is_create=True)
        == "pending_arrange"
    )
    assert (
        resolve_follow_status_on_save(save_mode="formal", current="drafting", is_create=False)
        == "pending_arrange"
    )
    assert (
        resolve_follow_status_on_save(save_mode="formal", current="arranged", is_create=False)
        == "arranged"
    )
    assert (
        resolve_follow_status_on_save(save_mode="formal", current="wait_notice", is_create=False)
        == "wait_notice"
    )


def test_assert_can_save_as_draft_rejects_arranged():
    assert "drafting" in DRAFTABLE_FOLLOW_STATUSES
    assert "pending_arrange" in DRAFTABLE_FOLLOW_STATUSES
    with pytest.raises(HTTPException) as exc:
        assert_can_save_as_draft("arranged")
    assert exc.value.status_code == 400
    assert "不可暂存" in str(exc.value.detail)