"""Modèle de données du mini-jeu Mots mêlés
(document_engine/labels/mots_config.py) — sans Flask, teste directement
sanitize_mots_config, la construction de la grille
(_build_mots_grid, via render_document_element), et le rendu du plateau."""

import json
from typing import Any

import document_engine as doc_engine
from document_engine.rendering.render_document_element import _build_mots_grid


def test_sanitize_mots_config_on_missing_input_returns_full_defaults() -> None:
    assert doc_engine.sanitize_mots_config(None) == {"theme_color": "#ff5f2e", "words": []}


def test_sanitize_mots_config_keeps_valid_words_uppercased() -> None:
    raw = {"theme_color": "#123456", "words": ["chat", "chien"]}
    config = doc_engine.sanitize_mots_config(raw)
    assert config["theme_color"] == "#123456"
    assert config["words"] == ["CHAT", "CHIEN"]


def test_sanitize_mots_config_strips_accents_and_non_letters() -> None:
    raw = {"words": ["éléphant", "un chat !", "12"]}
    config = doc_engine.sanitize_mots_config(raw)
    assert config["words"] == ["ELEPHANT", "UNCHAT"]


def test_sanitize_mots_config_drops_words_shorter_than_min_length() -> None:
    raw = {"words": ["a", "ok"]}
    assert doc_engine.sanitize_mots_config(raw)["words"] == ["OK"]


def test_sanitize_mots_config_deduplicates_words() -> None:
    raw = {"words": ["chat", "CHAT", "Chat"]}
    assert doc_engine.sanitize_mots_config(raw)["words"] == ["CHAT"]


def test_sanitize_mots_config_caps_words_at_max() -> None:
    alphabet = "abcdefghijklmnop"
    raw = {"words": [f"mot{alphabet[i]}" for i in range(doc_engine.MAX_WORDS + 3)]}
    config = doc_engine.sanitize_mots_config(raw)
    assert len(config["words"]) == doc_engine.MAX_WORDS


def test_sanitize_mots_config_ignores_garbage_top_level_input() -> None:
    assert doc_engine.sanitize_mots_config("n'importe quoi") == doc_engine.DEFAULT_MOTS_CONFIG


def _mots_element(attributes: dict[str, Any]) -> dict[str, Any]:
    return {"id": 1, "kind": "mots", "parent_id": None, "order_index": 0, "attributes": attributes}


def test_render_mots_without_words_shows_only_the_badge() -> None:
    html = doc_engine.render_document_element(_mots_element(doc_engine.DEFAULT_MOTS_CONFIG), {})
    assert "0 mot" in html
    assert "docMotsPlayer" not in html


def test_render_mots_with_words_includes_the_interactive_grid() -> None:
    config = doc_engine.sanitize_mots_config({"words": ["chat", "chien", "lapin", "oiseau", "poisson"]})
    html = doc_engine.render_document_element(_mots_element(config), {})
    assert "docMotsPlayer" in html
    assert "data-mots-config=" in html
    assert "5 mots" in html


def test_render_mots_escapes_word_text_in_embedded_json() -> None:
    # Un mot ne peut de toute façon contenir que des lettres A-Z une fois
    # sanitizé (voir sanitize_mots_config) : rien à échapper dans le texte
    # du mot lui-même. Le seul contenu utilisateur qui atteint réellement
    # l'attribut embarqué est donc déjà sûr par construction — ce test
    # vérifie que l'échappement JSON standard reste bien en place (guillemets).
    config = doc_engine.sanitize_mots_config({"words": ["chat", "chien"]})
    html = doc_engine.render_document_element(_mots_element(config), {})
    start = html.find('data-mots-config="') + len('data-mots-config="')
    end = html.find('"', start)
    embedded = json.loads(html[start:end].replace(""", '"'))
    assert {"CHAT", "CHIEN"} <= {w["text"] for w in embedded["words"]}


def _cells_spell(grid: list[list[str]], cells: list[list[int]]) -> str:
    return "".join(grid[r][c] for r, c in cells)


def test_build_mots_grid_places_every_word_along_its_own_cells() -> None:
    words = ["CHAT", "CHIEN", "OISEAU", "POISSON", "LAPIN"]
    built = _build_mots_grid(words)
    size = built["size"]
    grid = built["grid"]
    assert len(grid) == size
    assert all(len(row) == size for row in grid)
    placed = {w["text"] for w in built["words"]}
    assert placed == set(words)
    for w in built["words"]:
        assert _cells_spell(grid, w["cells"]) == w["text"]


def test_build_mots_grid_only_uses_the_four_allowed_directions() -> None:
    words = ["CHAT", "CHIEN", "OISEAU", "POISSON", "LAPIN", "SOURIS"]
    built = _build_mots_grid(words)
    allowed = {(0, 1), (1, 0), (1, 1), (1, -1)}
    for w in built["words"]:
        cells = w["cells"]
        if len(cells) < 2:
            continue
        delta_row = cells[1][0] - cells[0][0]
        delta_col = cells[1][1] - cells[0][1]
        assert (delta_row, delta_col) in allowed
        for i in range(len(cells) - 1):
            assert cells[i + 1][0] - cells[i][0] == delta_row
            assert cells[i + 1][1] - cells[i][1] == delta_col


def test_build_mots_grid_fills_every_remaining_cell_with_a_letter() -> None:
    built = _build_mots_grid(["CHAT", "CHIEN"])
    assert all(cell for row in built["grid"] for cell in row)


def test_build_mots_grid_on_empty_words_returns_an_empty_grid() -> None:
    assert _build_mots_grid([]) == {"size": 0, "grid": [], "words": []}