import html as html_lib
from typing import Any

_SHAPE_TAGS = {"rectangle": "rect", "cercle": "circle", "trait": "line"}


def render_document(elements: list[dict[str, Any]]) -> str:
    """Assemble le document ENTIER à partir de la liste à plat renvoyée
    par document_engine.list_document_elements : les éléments top-niveau
    (parent_id NULL) dans l'ordre, chaque rangée ("row") rendant
    récursivement ses propres enfants côte à côte. Point d'entrée unique
    du rendu, utilisé à la fois par le canevas d'édition et par le Mode
    Aperçu (même fonction, voir docs/plan/PLAN.md — "Aperçu réel")."""
    children_by_parent: dict[int | None, list[dict[str, Any]]] = {}
    for el in elements:
        children_by_parent.setdefault(el["parent_id"], []).append(el)
    top_level = children_by_parent.get(None, [])
    return "".join(render_document_element(el, children_by_parent) for el in top_level)


def render_document_element(el: dict[str, Any], children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    """HTML d'UN élément — dispatch par dict plutôt qu'un enchaînement de
    `if` (mirroir de l'esprit de game_engine/scenes/render_scene_object.py,
    mais un vrai registre ici puisque le nombre de kinds est plus élevé)."""
    renderer = _RENDERERS.get(el["kind"], _render_unknown)
    return renderer(el, children_by_parent)


def _render_row(el: dict[str, Any], children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    attrs = el["attributes"]
    gap = attrs.get("gap", 16)
    align = html_lib.escape(str(attrs.get("align", "stretch")))
    justify = html_lib.escape(str(attrs.get("justify", "flex-start")))
    style = f"display:flex; flex-wrap:wrap; gap:{gap}px; align-items:{align}; justify-content:{justify};"
    children = children_by_parent.get(el["id"], [])
    inner = "".join(render_document_element(child, children_by_parent) for child in children)
    return f'<div class="docRow" data-element-id="{el["id"]}" data-kind="row" style="{style}">{inner}</div>'


def _render_shape(el: dict[str, Any], _children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    a = el["attributes"]
    x, y, width, height = a["x"], a["y"], a["width"], a["height"]
    rotation, z_index = a.get("rotation", 0), a.get("z_index", 1)
    fill = html_lib.escape(str(a.get("fill", "#ff5f2e")))
    stroke = html_lib.escape(str(a.get("stroke", "#232a38")))
    stroke_width = a.get("stroke_width", 2)
    label = html_lib.escape(str(a.get("label", "")))
    wrap_style = (
        f"position:absolute; left:{x}px; top:{y}px; width:{width}px; height:{height}px; "
        f"transform:rotate({rotation}deg); z-index:{z_index};"
    )
    kind = el["kind"]
    stroke_attrs = f'stroke="{stroke}" stroke-width="{stroke_width}"'
    if kind == "triangle":
        points = f"{width / 2},0 {width},{height} 0,{height}"
        shape_svg = f'<polygon points="{points}" fill="{fill}" {stroke_attrs}></polygon>'
    else:
        tag = _SHAPE_TAGS.get(kind, "rect")
        if tag == "circle":
            cx, cy, r = width / 2, height / 2, min(width, height) / 2
            shape_svg = f'<circle cx="{cx}" cy="{cy}" r="{r}" fill="{fill}" {stroke_attrs}></circle>'
        elif tag == "line":
            shape_svg = f'<line x1="0" y1="{height / 2}" x2="{width}" y2="{height / 2}" {stroke_attrs}></line>'
        else:
            shape_svg = f'<rect width="{width}" height="{height}" fill="{fill}" {stroke_attrs}></rect>'
    label_attr = f' aria-label="{label}"' if label else ' aria-hidden="true"'
    return (
        f'<div class="docShape" data-element-id="{el["id"]}" data-kind="{kind}" style="{wrap_style}"{label_attr}>'
        f'<svg width="{width}" height="{height}" viewBox="0 0 {width} {height}">{shape_svg}</svg>'
        f"</div>"
    )


_STYLE_PRESETS = {
    "titre1": ("clamp(1.6rem,4vw,2rem)", 800, 1.15),
    "titre2": ("1.3rem", 800, 1.25),
    "paragraphe": ("15px", 400, 1.5),
    "legende": ("12.5px", 600, 1.4),
}


def _render_text(el: dict[str, Any], _children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    a = el["attributes"]
    content = html_lib.escape(str(a.get("content", "")))
    style_name = a.get("style", "paragraphe")
    font_size, base_weight, line_height = _STYLE_PRESETS.get(style_name, _STYLE_PRESETS["paragraphe"])
    weight = 800 if a.get("bold") else base_weight
    font_style = "italic" if a.get("italic") else "normal"
    text_decoration = "underline" if a.get("underline") else "none"
    align = html_lib.escape(str(a.get("align", "left")))
    color = html_lib.escape(str(a.get("color", "var(--forge-text)")))
    style = (
        f"font-size:{font_size}; font-weight:{weight}; line-height:{line_height}; "
        f"font-style:{font_style}; text-decoration:{text_decoration}; text-align:{align}; color:{color};"
    )
    return f'<div class="docText" data-element-id="{el["id"]}" data-kind="{el["kind"]}" style="{style}">{content}</div>'


def _render_image(el: dict[str, Any], _children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    a = el["attributes"]
    src = html_lib.escape(str(a.get("src", "")))
    alt = html_lib.escape(str(a.get("alt", "")))
    if not src:
        return (
            f'<div class="docImage docImagePlaceholder" data-element-id="{el["id"]}" data-kind="image">'
            f"Image — aucun fichier choisi</div>"
        )
    return f'<img class="docImage" data-element-id="{el["id"]}" data-kind="image" src="{src}" alt="{alt}">'


def _render_button(el: dict[str, Any], _children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    a = el["attributes"]
    label = html_lib.escape(str(a.get("label", "Bouton")))
    target = html_lib.escape(str(a.get("target", "")))
    target_attr = f' data-target="{target}"' if target else ""
    return (
        f'<button type="button" class="docButton" data-element-id="{el["id"]}" data-kind="bouton"{target_attr}>'
        f"{label}</button>"
    )


def _render_minigame_placeholder(
    el: dict[str, Any], _children_by_parent: dict[int | None, list[dict[str, Any]]]
) -> str:
    from ..labels.element_kind_labels import ELEMENT_KIND_LABELS

    a = el["attributes"]
    theme_color = html_lib.escape(str(a.get("theme_color", "#ff5f2e")))
    label = html_lib.escape(ELEMENT_KIND_LABELS.get(el["kind"], el["kind"]))
    return (
        f'<div class="docMinigame" data-element-id="{el["id"]}" data-kind="{el["kind"]}" '
        f'style="border-color:{theme_color};">'
        f'<span class="docMinigameLabel">{label}</span>'
        f'<span class="docMinigamePlaceholder">Formulaire de contenu à venir</span>'
        f"</div>"
    )


def _render_quiz(el: dict[str, Any], _children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    from ..labels.quiz_config import quiz_total_points, sanitize_quiz_config

    config = sanitize_quiz_config(el["attributes"])
    theme_color = html_lib.escape(str(config["theme_color"]))
    question_count = len(config["questions"])
    question_label = "question" if question_count <= 1 else "questions"
    total_points = quiz_total_points(config)
    timer_note = f" · ⏱ {config['timer_seconds']}s/question" if config["timer_enabled"] else ""
    subtitle = f"{question_count} {question_label} · {total_points} points{timer_note}"
    return (
        f'<div class="docMinigame" data-element-id="{el["id"]}" data-kind="quiz" '
        f'style="border-color:{theme_color};">'
        f'<span class="docMinigameLabel">Quiz</span>'
        f'<span class="docMinigamePlaceholder">{html_lib.escape(subtitle)}</span>'
        f"</div>"
    )


def _render_unknown(el: dict[str, Any], _children_by_parent: dict[int | None, list[dict[str, Any]]]) -> str:
    return f'<div class="docUnknown" data-element-id="{el["id"]}">Type inconnu : {html_lib.escape(el["kind"])}</div>'


_RENDERERS = {
    "row": _render_row,
    "rectangle": _render_shape,
    "cercle": _render_shape,
    "triangle": _render_shape,
    "trait": _render_shape,
    "titre": _render_text,
    "paragraphe": _render_text,
    "image": _render_image,
    "bouton": _render_button,
    "quiz": _render_quiz,
    "association": _render_minigame_placeholder,
    "memory": _render_minigame_placeholder,
    "mots": _render_minigame_placeholder,
    "scenario": _render_minigame_placeholder,
    "zones": _render_minigame_placeholder,
}