"""Unit tests for GalleryDLService._compute_run_stats.

Covers the structured counts the Downloads modal surfaces in its header row:
exit code, downloaded count, skipped count, per-item failures, warning count.
"""
from unittest.mock import patch

from app.services.gallery_dl import GalleryDLService


def _make_service():
    with patch.object(GalleryDLService, "_load_base_config", return_value={}):
        return GalleryDLService(rate_limit=1.0)


def test_run_stats_all_zeros_on_empty_output():
    service = _make_service()
    stats = service._compute_run_stats(0, "", "")
    assert stats == {
        "exit_code": 0,
        "downloaded_count": 0,
        "skipped_count": 0,
        "per_item_failures": 0,
        "warning_count": 0,
        "tier_gated_count": 0,
    }


def test_run_stats_counts_downloads_from_stdout_paths():
    service = _make_service()
    stdout = (
        "/data/downloads/Foo/bar/1.jpg\n"
        "/data/downloads/Foo/bar/2.jpg\n"
        "[some log line that should not count]\n"
    )
    stats = service._compute_run_stats(0, stdout, "")
    assert stats["downloaded_count"] == 2


def test_run_stats_skips_from_both_streams():
    """stdout '#' lines AND stderr 'skipping ' lines both count."""
    service = _make_service()
    stdout = (
        "# /data/downloads/Foo/already_archived_1.jpg\n"
        "# /data/downloads/Foo/already_archived_2.jpg\n"
    )
    stderr = (
        "[patreon][debug] skipping https://example.com/a.jpg (abc image_large)\n"
        "[patreon][debug] skipping https://example.com/b.jpg (def image_large)\n"
        "[patreon][debug] skipping https://example.com/c.jpg (ghi image_large)\n"
    )
    stats = service._compute_run_stats(0, stdout, stderr)
    assert stats["skipped_count"] == 5


def test_run_stats_per_item_failures_counted():
    service = _make_service()
    stderr = (
        "[download][error] Failed to download 02_46004845.part\n"
        "[download][error] Failed to download 03_46004845.part\n"
        "[patreon][debug] something unrelated\n"
    )
    stats = service._compute_run_stats(1, "", stderr)
    assert stats["per_item_failures"] == 2


def test_run_stats_warnings_counted():
    service = _make_service()
    stderr = (
        "[downloader.http][warning] '404 OK' for 'https://example.com/x'\n"
        "[patreon][warning] something else\n"
        "[patreon][error] not a warning\n"
    )
    stats = service._compute_run_stats(1, "", stderr)
    assert stats["warning_count"] == 2


def test_run_stats_exit_code_passed_through():
    service = _make_service()
    assert service._compute_run_stats(0, "", "")["exit_code"] == 0
    assert service._compute_run_stats(4, "", "")["exit_code"] == 4
    assert service._compute_run_stats(-9, "", "")["exit_code"] == -9


def test_run_stats_tier_gated_count_from_patreon_warnings():
    """'Not allowed to view post N' warnings tallied separately from generic warnings."""
    service = _make_service()
    stderr = (
        "[patreon][warning] Not allowed to view post 100\n"
        "[patreon][warning] Not allowed to view post 101\n"
        "[patreon][warning] Not allowed to view post 102\n"
        "[downloader.http][warning] '404 OK' for 'https://example.com/x'\n"
    )
    stats = service._compute_run_stats(4, "", stderr)
    assert stats["tier_gated_count"] == 3
    # Still tallied in warning_count — tier_gated is a subset, not separate
    assert stats["warning_count"] == 4