"""Tests for the YAML config loader.

Focuses on the ``languages`` and ``prefer_manual`` fields, including the
legacy/compat behaviour.  Network-free, DB-free.
"""
from __future__ import annotations

import textwrap

import pytest

from yt_scraper.config import load_config, parse_languages


def _write_config(tmp_path, body: str) -> str:
    p = tmp_path / "config.yaml"
    p.write_text(textwrap.dedent(body), encoding="utf-8")
    return str(p)


def test_load_legacy_languages_list(tmp_path) -> None:
    p = _write_config(tmp_path, """
        channel_url: "https://example.com/@x/videos"
        languages: ["es", "en"]
        prefer_manual: true
    """)
    cfg = load_config(p)
    assert cfg.languages == {"es": "manual", "en": "manual"}


def test_load_legacy_languages_list_with_prefer_manual_false(tmp_path) -> None:
    p = _write_config(tmp_path, """
        languages: ["es", "en"]
        prefer_manual: false
    """)
    cfg = load_config(p)
    assert cfg.languages == {"es": "auto", "en": "auto"}


def test_load_new_dict_languages(tmp_path) -> None:
    p = _write_config(tmp_path, """
        languages:
          en: manual
          es: auto
          pt: any
        prefer_manual: false
    """)
    cfg = load_config(p)
    assert cfg.languages == {"en": "manual", "es": "auto", "pt": "any"}
    # prefer_manual remains accessible for fallback on `"any"` entries
    assert cfg.prefer_manual is False


def test_load_unknown_mode_normalises_to_any(tmp_path) -> None:
    p = _write_config(tmp_path, """
        languages:
          en: garbage
    """)
    cfg = load_config(p)
    assert cfg.languages == {"en": "any"}


def test_load_missing_languages_defaults_to_any_not_manual_only(tmp_path) -> None:
    """The default must fall back to auto captions.

    A manual-only default silently produces zero transcripts on the many
    channels that publish only auto-generated captions, and records them as
    `no_subtitles` — a terminal status that hides a purely configural failure.
    """
    p = _write_config(tmp_path, """
        channel_url: "https://example.com/@x/videos"
    """)
    cfg = load_config(p)
    assert "es" in cfg.languages and "en" in cfg.languages
    assert cfg.languages["es"] == "any"