import os
import tempfile
import unittest
from pathlib import Path

from copienator_gui.app import CopienatorApp
from copienator_gui.workflow import command_display
from copienator.commands.page_splitter import _selected_inputs
from copienator import EvaluationWorkspace


@unittest.skipUnless(os.environ.get("DISPLAY"), "Tk requires a display")
class GuiConvenienceTests(unittest.TestCase):
    def setUp(self):
        self.temp = tempfile.TemporaryDirectory()
        self.repository = Path(self.temp.name)
        self.evaluation = self.repository / "Évaluation avec espaces"
        self.evaluation.mkdir()
        self.app = CopienatorApp(self.repository, False, self.evaluation)
        self.app.update()

    def tearDown(self):
        for callback in self.app.tk.splitlist(self.app.tk.call("after", "info")):
            self.app.after_cancel(callback)
        self.app.destroy()
        self.temp.cleanup()

    def test_reload_detects_added_and_removed_files_without_advancing(self):
        for name in ("enonce.pdf", "enonce.tex", "correction.tex"):
            (self.evaluation / name).touch()
        self.app._reload_inputs()
        self.assertIn("names", self.app.info_var.get())
        (self.repository / "names").touch()
        self.app._reload_inputs()
        self.app.update()
        self.assertEqual(self.app.state_store.step("inputs")["status"], "success")
        self.assertEqual(self.app.current_step.id, "inputs")
        (self.evaluation / "enonce.pdf").unlink()
        self.app._reload_inputs()
        self.assertEqual(self.app.state_store.step("inputs")["status"], "ready")
        self.assertIn("enonce.pdf", self.app.description_label.cget("text"))

    def test_redo_targets_selected_copy_and_copies_runnable_command(self):
        for folder in ("Copies", "Copies Originales"):
            (self.evaluation / folder).mkdir()
            for name in ("Copie01.pdf", "Copie02.pdf"):
                (self.evaluation / folder / name).touch()
        self.app.tree.selection_set("page_splitter")
        self.app.update()
        self.app.copy_var.set("Copie02.pdf")
        self.app._redo_selected_pages()
        command = self.app._make_command()
        target = Path(command[-1])
        self.assertEqual(target, self.evaluation / "Copies" / "Copie02.pdf")
        self.assertEqual(_selected_inputs(EvaluationWorkspace(self.evaluation), target),
                         [self.evaluation / "Copies Originales" / "Copie02.pdf"])
        self.app._copy_command()
        self.assertEqual(self.app.clipboard_get(), command_display(command))
        self.app._target_all_pages()
        self.assertEqual(self.app.arg_vars["target"].get(), self.app._evaluation_arg())

    def test_console_selection_survives_output_and_is_read_only(self):
        self.app._append_console("Première ligne\nDeuxième ligne\n")
        self.app.console.tag_add("sel", "1.0", "1.end")
        self.app._append_console("Suite\n")
        self.app._copy_console_selection()
        self.assertEqual(self.app.clipboard_get(), "Première ligne")
        self.app._copy_console_all()
        expected = "Première ligne\nDeuxième ligne\nSuite\n"
        self.assertEqual(self.app.clipboard_get(), expected)
        self.app.console.insert("end", "unwanted edit")
        self.assertEqual(self.app.console.get("1.0", "end-1c"), expected)
        self.app._select_console_all()
        self.app._copy_console_selection()
        self.assertEqual(self.app.clipboard_get(), expected)