"""The request models turn payloads that used to 500 into clean validation errors,
and PATCH models distinguish an absent field from an explicit null. Pure-logic (no DB) — it
exercises the Pydantic models the route modules define, not the endpoints."""

import pytest
from pydantic import ValidationError

from app.routes.channels import AttachTagIn, ChannelUpdateIn
from app.routes.downloads import AdminSetQuotaIn
from app.routes._common import ProgressIn
from app.routes.setup import SetupAdminIn
from app.routes.tags import TagUpdateIn


# --- The three ROADMAP-named 500-producers are now 422s (ValidationError at the boundary). ---


def test_channel_priority_rejects_non_numeric():
    # Was `int(payload["priority"])` → 500 on garbage. Now a validation error.
    with pytest.raises(ValidationError):
        ChannelUpdateIn(priority="not-a-number")


def test_channel_priority_accepts_int_and_numeric_string():
    assert ChannelUpdateIn(priority=5).priority == 5
    assert ChannelUpdateIn(priority="5").priority == 5  # lax numeric-string coercion, as before


def test_channel_update_fields_all_optional():
    m = ChannelUpdateIn()
    assert m.priority is None and m.hidden is None and m.deep_requested is None


def test_attach_tag_rejects_non_int_id():
    # Was a str tag_id into db.get(Tag, ...) — a DB cast 500. Now rejected up front.
    with pytest.raises(ValidationError):
        AttachTagIn(tag_id="abc")


def test_setup_admin_password_must_be_a_string():
    # Was a non-string password reaching len()/argon2 → 500. `str` rejects it.
    with pytest.raises(ValidationError):
        SetupAdminIn(email="a@b.c", password=12345)


def test_admin_quota_rejects_non_numeric_limit():
    # Was `int(payload["max_bytes"])` → 500. Now a validation error.
    with pytest.raises(ValidationError):
        AdminSetQuotaIn(max_bytes="lots")


def test_progress_accepts_fractional_seconds():
    # The player may post a raw currentTime (a float). The field must accept it (truncated in the
    # handler) — a plain `int` field would 422 on the progress hot path.
    assert ProgressIn(position_seconds=12.7).position_seconds == 12.7
    assert int(ProgressIn(position_seconds=12.7).position_seconds) == 12
    with pytest.raises(ValidationError):
        ProgressIn(position_seconds="not-a-number")


# --- PATCH models: model_fields_set separates "absent" from "explicit null". ---


def test_tag_update_absent_vs_null_color():
    absent = TagUpdateIn()
    assert "color" not in absent.model_fields_set  # untouched on PATCH

    cleared = TagUpdateIn(color=None)
    assert "color" in cleared.model_fields_set  # an explicit null CLEARS it
    assert cleared.color is None