"""Tests du runner G2 : process_fn injectée, vrais fichiers tmp, aucun moteur réel."""

from __future__ import annotations

import threading
from pathlib import Path

import pytest

from gui_v6.processing_runner import (
    ProcessingRunner,
    RunSummary,
    default_output_dir,
    discover_documents,
)

_EXTS = (".pdf", ".txt")


def _touch(path: Path) -> Path:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text("x", encoding="utf-8")
    return path


# -- découverte & chemins --------------------------------------------------

def test_discover_single_file(tmp_path):
    f = _touch(tmp_path / "doc.pdf")
    assert discover_documents(f, _EXTS) == [f]


def test_discover_single_file_unsupported(tmp_path):
    f = _touch(tmp_path / "doc.xyz")
    assert discover_documents(f, _EXTS) == []


def test_discover_folder_sorted_and_skips_output(tmp_path):
    _touch(tmp_path / "b.pdf")
    _touch(tmp_path / "a.pdf")
    _touch(tmp_path / "note.txt")
    _touch(tmp_path / "anonymise" / "already.pdf")  # sous-arbre de sortie ignoré
    found = discover_documents(tmp_path, _EXTS)
    names = [p.name for p in found]
    assert names == ["a.pdf", "b.pdf", "note.txt"]


def test_default_output_dir_file_and_dir(tmp_path):
    f = _touch(tmp_path / "doc.pdf")
    assert default_output_dir(f) == tmp_path / "anonymise"
    assert default_output_dir(tmp_path) == tmp_path / "anonymise"


# -- exécution -------------------------------------------------------------

def test_run_processes_all_docs(tmp_path):
    _touch(tmp_path / "a.pdf")
    _touch(tmp_path / "b.pdf")
    calls = []
    runner = ProcessingRunner(process_fn=lambda d, o: calls.append((d, o)) or {}, extensions=_EXTS)

    summary = runner.run(tmp_path)

    assert isinstance(summary, RunSummary)
    assert summary.total == 2
    assert summary.succeeded == 2
    assert summary.failed == 0
    assert summary.ok is True
    assert len(calls) == 2
    # Le dossier de sortie par défaut a été créé.
    assert (tmp_path / "anonymise").is_dir()


def test_run_single_file_uses_output_dir(tmp_path):
    f = _touch(tmp_path / "doc.pdf")
    out = tmp_path / "sortie"
    seen = {}
    runner = ProcessingRunner(process_fn=lambda d, o: seen.update(doc=d, out=o) or {}, extensions=_EXTS)

    summary = runner.run(f, output_dir=out)

    assert summary.total == 1 and summary.succeeded == 1
    assert seen["doc"] == f
    assert seen["out"] == out
    assert out.is_dir()


def test_run_continues_after_failure(tmp_path):
    _touch(tmp_path / "a.pdf")
    _touch(tmp_path / "boom.pdf")
    _touch(tmp_path / "c.pdf")

    def proc(doc, out):
        if doc.name == "boom.pdf":
            raise RuntimeError("explosion")
        return {}

    runner = ProcessingRunner(process_fn=proc, extensions=_EXTS)
    summary = runner.run(tmp_path)

    assert summary.total == 3
    assert summary.succeeded == 2
    assert summary.failed == 1
    assert summary.ok is False
    assert summary.errors[0][0] == "boom.pdf"
    assert "explosion" in summary.errors[0][1]


def test_run_empty_folder(tmp_path):
    logs = []
    runner = ProcessingRunner(process_fn=lambda d, o: {}, extensions=_EXTS)
    summary = runner.run(tmp_path, on_log=logs.append)
    assert summary.total == 0
    assert any("Aucun document" in m for m in logs)


def test_stop_event_interrupts_between_docs(tmp_path):
    for name in ("a.pdf", "b.pdf", "c.pdf"):
        _touch(tmp_path / name)
    stop = threading.Event()
    processed = []

    def proc(doc, out):
        processed.append(doc.name)
        stop.set()  # demande l'arrêt après le 1er document
        return {}

    runner = ProcessingRunner(process_fn=proc, extensions=_EXTS)
    summary = runner.run(tmp_path, stop_event=stop)

    assert summary.stopped is True
    assert summary.succeeded == 1
    assert len(processed) == 1  # arrêt effectif entre deux documents


def test_progress_callbacks(tmp_path):
    _touch(tmp_path / "a.pdf")
    _touch(tmp_path / "b.pdf")
    events = []
    runner = ProcessingRunner(process_fn=lambda d, o: {}, extensions=_EXTS)
    runner.run(tmp_path, on_progress=lambda done, total, name: events.append((done, total)))
    assert (2, 2) in events  # progression finale atteinte


def test_no_double_run(tmp_path):
    _touch(tmp_path / "a.pdf")
    started = threading.Event()
    release = threading.Event()
    result = {}

    def proc(doc, out):
        started.set()
        release.wait(timeout=2)
        return {}

    runner = ProcessingRunner(process_fn=proc, extensions=_EXTS)
    worker = threading.Thread(target=lambda: runner.run(tmp_path))
    worker.start()
    assert started.wait(timeout=2)
    # Pendant le run, un second lancement est refusé.
    with pytest.raises(RuntimeError):
        runner.run(tmp_path)
    release.set()
    worker.join(timeout=2)
    assert runner.is_running is False