"""Module 4 — Communication série & débogage."""
from outils import boite, chronogramme, fleche, toile
from style import BLEU, ENCRE, GRIS, ORANGE, VERT, Figure


def trame_uart():
    # 'A' = 0x41 = 0b01000001, envoyé bit de poids faible en premier
    donnees = [(0x41 >> k) & 1 for k in range(8)]
    bits = [1] + [0] + donnees + [1] + [1]          # repos, start, D0..D7, stop, repos
    points = [(i, b) for i, b in enumerate(bits)]
    fig, ax, y = chronogramme([("TX", points)], 12, largeur_cm=16, hauteur_voie_cm=2.2)
    ax.set_xticks([])
    ax.spines["bottom"].set_visible(False)
    noms = ["repos", "start"] + [f"D{k}" for k in range(8)] + ["stop", "repos"]
    couleurs = [GRIS, ORANGE] + [BLEU] * 8 + [VERT, GRIS]
    for i, (n, c) in enumerate(zip(noms, couleurs)):
        ax.text(i + 0.5, 1.35, n, ha="center", fontsize=8, color=c, fontweight="bold")
        if 2 <= i <= 9:
            ax.text(i + 0.5, -0.35, str(bits[i]), ha="center", fontsize=9, color=ENCRE)
        ax.axvline(i, ymin=0.12, ymax=0.83, color="#e5e7eb", lw=0.7, zorder=0)
    ax.annotate("", xy=(2, 1.85), xytext=(10, 1.85), arrowprops=dict(arrowstyle="<->", lw=0.9, color=BLEU))
    ax.text(6, 1.95, "8 bits de données : 'A' = 0x41, bit de poids faible (D0) en premier",
            ha="center", va="bottom", fontsize=8, color=BLEU)
    ax.annotate("", xy=(1, -0.75), xytext=(2, -0.75), arrowprops=dict(arrowstyle="<->", lw=0.9))
    ax.text(2.15, -0.75, "1 bit = 1 / 115200 s ≈ 8,7 µs", va="center", fontsize=8, color=ENCRE)
    ax.text(12, -0.75, "8N1 : 8 bits, pas de parité, 1 bit de stop", ha="right", va="center",
            fontsize=8, color=GRIS)
    ax.set_ylim(-1.1, 2.5)
    fig.tight_layout()
    return fig


def cablage_serie():
    fig, ax = toile(16, 6.8)
    pc = boite(ax, 1.8, 3.1, 3.0, 2.2, "Ordinateur\n\nMoniteur série", couleur=GRIS, taille=8.5)
    esp = boite(ax, 8.0, 3.2, 4.0, 4.6, couleur=BLEU, fond="#f5f8fe")
    ax.text(8.0, 5.1, "ESP32-S3", ha="center", fontsize=10, color=BLEU, fontweight="bold")
    mod = boite(ax, 14.0, 3.0, 3.0, 3.8, couleur=ORANGE)
    ax.text(14.0, 4.2, "Module externe\n(GPS, RFID…)", ha="center", va="center", fontsize=8.5, color=ENCRE)
    # USB natif
    boite(ax, 7.0, 4.2, 1.6, 0.6, "USB", couleur=GRIS, taille=8)
    fleche(ax, (3.3, 4.2), (6.2, 4.2), "Serial\n(USB CDC)", double=True, couleur=VERT, taille=8)
    # Broches Serial2
    for yy, nom in ((3.0, "GPIO18 (TX)"), (2.0, "GPIO17 (RX)")):
        ax.text(9.9, yy, nom, ha="right", va="center", fontsize=8.5, color=ENCRE)
    for yy, nom in ((3.0, "RX"), (2.0, "TX")):
        ax.text(12.7, yy, nom, ha="left", va="center", fontsize=8.5, color=ENCRE)
    ax.text(9.9, 1.0, "GND", ha="right", va="center", fontsize=8.5, color=ENCRE)
    ax.text(12.7, 1.0, "GND", ha="left", va="center", fontsize=8.5, color=ENCRE)
    fleche(ax, (10.0, 3.0), (12.5, 2.0), couleur=BLEU)
    fleche(ax, (12.5, 3.0), (10.0, 2.0), couleur=ORANGE)
    ax.plot([10.0, 12.5], [1.0, 1.0], color=ENCRE, lw=1.3)
    ax.text(11.25, 3.35, "croisé !", ha="center", fontsize=8.5, color=ORANGE, fontweight="bold")
    ax.text(11.25, 0.55, "masse commune", ha="center", fontsize=7.5, color=GRIS)
    ax.text(8.0, 0.15, "Serial2.begin(9600, SERIAL_8N1, 17, 18);", ha="center", fontsize=7.5,
            color=GRIS, family="monospace")
    return fig


FIGURES = [
    Figure("m04-trame-uart", trame_uart),
    Figure("m04-cablage-serie", cablage_serie),
]