Ajoute les visualisations des couleurs de têtes de minifigs et jalons

lib/plots/minifig_heads.py

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+"""Visualisations des couleurs de têtes de minifigs."""
+
+from pathlib import Path
+from typing import Dict, Iterable, List, Tuple
+
+import matplotlib.pyplot as plt
+
+from lib.filesystem import ensure_parent_dir
+from lib.milestones import load_milestones
+from lib.rebrickable.stats import read_rows
+
+
+def load_heads_by_year(path: Path) -> List[dict]:
+    """Charge l'agrégat des têtes par année."""
+    return read_rows(path)
+
+
+def select_top_colors(rows: Iterable[dict], limit: int = 10) -> List[Tuple[str, str, str]]:
+    """Retourne les couleurs les plus fréquentes (color_name, color_rgb, is_translucent)."""
+    totals: Dict[Tuple[str, str, str], int] = {}
+    for row in rows:
+        key = (row["color_name"], row["color_rgb"], row["is_translucent"])
+        totals[key] = totals.get(key, 0) + int(row["quantity"])
+    sorted_colors = sorted(totals.items(), key=lambda item: (-item[1], item[0][0], item[0][1]))
+    return [color for color, _ in sorted_colors[:limit]]
+
+
+def build_share_matrix(rows: Iterable[dict], top_colors: List[Tuple[str, str, str]]) -> Tuple[List[int], List[Tuple[str, str, str]], List[Dict[str, float]]]:
+    """Construit les parts par année, en agrégeant les couleurs hors top dans 'Autres'."""
+    years = sorted({int(row["year"]) for row in rows})
+    colors = top_colors + [("Autres", "444444", "false")]
+    shares_by_year: List[Dict[str, float]] = []
+    rows_by_year: Dict[int, List[dict]] = {year: [] for year in years}
+    for row in rows:
+        rows_by_year[int(row["year"])].append(row)
+    for year in years:
+        year_rows = rows_by_year[year]
+        total = sum(int(r["quantity"]) for r in year_rows)
+        shares: Dict[str, float] = {color[0]: 0.0 for color in colors}
+        for r in year_rows:
+            key = (r["color_name"], r["color_rgb"], r["is_translucent"])
+            quantity = int(r["quantity"])
+            target = "Autres" if key not in top_colors else r["color_name"]
+            shares[target] = shares.get(target, 0.0) + quantity / total
+        shares_by_year.append(shares)
+    return years, colors, shares_by_year
+
+
+def plot_shares_by_year(
+    heads_path: Path,
+    destination_path: Path,
+    top_limit: int = 10,
+    milestones_path: Path | None = None,
+) -> None:
+    """Trace les parts des couleurs de têtes par année (stacked) avec jalons optionnels."""
+    rows = load_heads_by_year(heads_path)
+    top_colors = select_top_colors(rows, limit=top_limit)
+    years, colors, shares_by_year = build_share_matrix(rows, top_colors)
+    milestones = load_milestones(milestones_path) if milestones_path else []
+
+    fig, ax = plt.subplots(figsize=(14, 6))
+    bottoms = [0.0] * len(years)
+    for name, color_rgb, is_trans in colors:
+        values = [shares[name] for shares in shares_by_year]
+        edge = "#f2f2f2" if is_trans == "true" else "#0d0d0d"
+        ax.bar(
+            years,
+            values,
+            bottom=bottoms,
+            color=f"#{color_rgb}",
+            edgecolor=edge,
+            label=name,
+            linewidth=0.7,
+        )
+        bottoms = [b + v for b, v in zip(bottoms, values)]
+    ax.set_ylim(0, 1.05)
+    ax.set_ylabel("Part des couleurs (têtes de minifigs)")
+    ax.set_xlabel("Année")
+    ax.set_xticks(years)
+    ax.set_title("Répartition des couleurs de peau (têtes de minifigs) par année")
+    ax.legend(loc="upper left", bbox_to_anchor=(1.02, 1), frameon=False)
+    ax.grid(True, axis="y", linestyle="--", alpha=0.25)
+    if milestones:
+        min_year = min(years)
+        max_year = max(years)
+        milestones_in_range = sorted(
+            [m for m in milestones if min_year <= m["year"] <= max_year],
+            key=lambda m: (m["year"], m["description"]),
+        )
+        offset_step = 0.3
+        offset_map: Dict[int, int] = {}
+        top_limit = ax.get_ylim()[1] * 2
+        for milestone in milestones_in_range:
+            year = milestone["year"]
+            count_for_year = offset_map.get(year, 0)
+            offset_map[year] = count_for_year + 1
+            horizontal_offset = offset_step * (count_for_year // 2 + 1)
+            if count_for_year % 2 == 1:
+                horizontal_offset *= -1
+            text_x = year + horizontal_offset
+            ax.axvline(year, color="#d62728", linestyle="--", linewidth=1, alpha=0.65, zorder=1)
+            ax.text(
+                text_x,
+                top_limit,
+                milestone["description"],
+                rotation=90,
+                verticalalignment="top",
+                horizontalalignment="center",
+                fontsize=8,
+                color="#d62728",
+            )
+        ax.set_ylim(ax.get_ylim()[0], top_limit * (1 + max(offset_map.values(), default=0) * 0.02))
+    ensure_parent_dir(destination_path)
+    fig.tight_layout()
+    fig.savefig(destination_path, dpi=170)
+    plt.close(fig)
+
+
+def plot_global_shares(heads_path: Path, destination_path: Path, top_limit: int = 10) -> None:
+    """Trace une vue globale des parts de couleurs de têtes (donut)."""
+    rows = load_heads_by_year(heads_path)
+    top_colors = select_top_colors(rows, limit=top_limit)
+    totals: Dict[Tuple[str, str, str], int] = {}
+    for row in rows:
+        key = (row["color_name"], row["color_rgb"], row["is_translucent"])
+        totals[key] = totals.get(key, 0) + int(row["quantity"])
+    other_total = sum(value for color, value in totals.items() if color not in top_colors)
+    labels: List[str] = []
+    colors_hex: List[str] = []
+    edgecolors: List[str] = []
+    sizes: List[int] = []
+    for name, color_rgb, is_trans in top_colors:
+        labels.append(name)
+        colors_hex.append(f"#{color_rgb}")
+        edgecolors.append("#f2f2f2" if is_trans == "true" else "#0d0d0d")
+        sizes.append(totals[(name, color_rgb, is_trans)])
+    if other_total > 0:
+        labels.append("Autres")
+        colors_hex.append("#444444")
+        edgecolors.append("#0d0d0d")
+        sizes.append(other_total)
+
+    fig, ax = plt.subplots(figsize=(7, 7))
+    wedges, _ = ax.pie(
+        sizes,
+        labels=[""] * len(labels),
+        colors=colors_hex,
+        startangle=90,
+        counterclock=False,
+        wedgeprops={"linewidth": 1.0, "edgecolor": "#0d0d0d"},
+    )
+    for wedge, edge in zip(wedges, edgecolors):
+        wedge.set_edgecolor(edge)
+    total = sum(sizes)
+    legend_labels = [f"{name} ({size/total:.1%})" for name, size in zip(labels, sizes)]
+    ax.legend(wedges, legend_labels, loc="center left", bbox_to_anchor=(1.02, 0.5), frameon=False)
+    centre_circle = plt.Circle((0, 0), 0.55, fc="white")
+    ax.add_artist(centre_circle)
+    ax.set_title("Répartition globale des couleurs de têtes de minifigs")
+    ensure_parent_dir(destination_path)
+    fig.tight_layout()
+    fig.savefig(destination_path, dpi=170)
+    plt.close(fig)