import os, uuid, re, traceback
from PIL import Image, ImageDraw, ImageFont, ImageFilter, ImageOps
from .config import THEMES, FONT_REG, FONT_BOLD, W, H, MARGIN_X, SAFE_Y_TOP, TMP_DIR

def wrap_text(text, font, max_width, draw):
    lines = []
    for para in text.split("\n"):
        current = []
        for word in para.split(" "):
            test = " ".join(current + [word])
            try:
                w = draw.textlength(test, font=font)
            except AttributeError:
                bbox = draw.textbbox((0, 0), test, font=font)
                w = bbox[2] - bbox[0]
            if w <= max_width or not current:
                current.append(word)
            else:
                lines.append(" ".join(current))
                current = [word]
        if current:
            lines.append(" ".join(current))
    return lines

def draw_text_shadow(draw, xy, text, font, fill=(255, 255, 255)):
    x, y = xy
    draw.text((x + 2, y + 2), text, font=font, fill=(0, 0, 0))
    draw.text((x, y), text, font=font, fill=fill)

def make_background(titre, sous_titre, texte_ecran, theme, logo_path, logo_pos, img_fond, fond_mode="plein écran"):
    try:
        print(f"[Fond] Création du fond - Thème: {theme}")
        if not titre:
            titre = ""
        if not theme or theme not in THEMES:
            theme = list(THEMES.keys())[0]
            print(f"[Fond] Thème invalide, utilisation par défaut: {theme}")

        c = THEMES[theme]
        primary = tuple(c["primary"])
        secondary = tuple(c["secondary"])

        bg = Image.new("RGB", (W, H), primary)
        draw = ImageDraw.Draw(bg)

        if img_fond and os.path.exists(img_fond):
            try:
                img = Image.open(img_fond).convert("RGB")
                if fond_mode == "plein écran":
                    img = img.resize((W, H))
                    img = img.filter(ImageFilter.GaussianBlur(1))
                    overlay = Image.new("RGBA", (W, H), (*primary, 90))
                    bg = Image.alpha_composite(img.convert("RGBA"), overlay).convert("RGB")
                elif fond_mode == "moitié gauche":
                    img = img.resize((W//2, H))
                    mask = Image.linear_gradient("L").resize((W//2, H))
                    color = Image.new("RGB", (W//2, H), primary)
                    comp = Image.composite(img, color, ImageOps.invert(mask))
                    bg.paste(comp, (0, 0))
                elif fond_mode == "moitié droite":
                    img = img.resize((W//2, H))
                    mask = Image.linear_gradient("L").resize((W//2, H))
                    color = Image.new("RGB", (W//2, H), primary)
                    comp = Image.composite(color, img, mask)
                    bg.paste(comp, (W//2, 0))
                elif fond_mode == "moitié bas":
                    img = img.resize((W, H//2))
                    mask = Image.linear_gradient("L").rotate(90).resize((W, H//2))
                    color = Image.new("RGB", (W, H//2), primary)
                    comp = Image.composite(color, img, mask)
                    bg.paste(comp, (0, H//2))
                draw = ImageDraw.Draw(bg)
                print(f"[Fond] Image de fond appliquée: {fond_mode}")
            except Exception as e:
                print(f"[Fond] Erreur image de fond: {e}")

        try:
            f_title = ImageFont.truetype(FONT_BOLD, 84)
            f_sub = ImageFont.truetype(FONT_REG, 44)
            f_text = ImageFont.truetype(FONT_REG, 40)
            f_small = ImageFont.truetype(FONT_REG, 30)
        except Exception as e:
            print(f"[Fond] Erreur polices, utilisation par défaut: {e}")
            f_title = ImageFont.load_default()
            f_sub = ImageFont.load_default()
            f_text = ImageFont.load_default()
            f_small = ImageFont.load_default()

        draw.rectangle([(0, 0), (W, 96)], fill=secondary)
        draw.rectangle([(0, H-96), (W, H)], fill=secondary)

        draw_text_shadow(draw, (MARGIN_X, 30), "CPAS BRUXELLES • Département d'Action Sociale", f_small)
        draw_text_shadow(draw, (W//2-280, H-72), "📞 02/543.61.11 •  Respect, Inclusion, Solidarité, Innovation et Engagement", f_small)
        draw_text_shadow(draw, (MARGIN_X, SAFE_Y_TOP), titre, f_title)
        draw_text_shadow(draw, (MARGIN_X, SAFE_Y_TOP + 100), sous_titre, f_sub)

        y = SAFE_Y_TOP + 200
        if texte_ecran:
            for line in texte_ecran.split("\n"):
                wrapped_lines = wrap_text("• " + line.strip("• "), f_text, W - MARGIN_X*2, draw)
                for l in wrapped_lines:
                    draw_text_shadow(draw, (MARGIN_X, y), l, f_text)
                    y += 55

        if logo_path and os.path.exists(logo_path):
            try:
                logo = Image.open(logo_path).convert("RGBA")
                logo.thumbnail((260, 260))
                lw, lh = logo.size
                if logo_pos == "haut-gauche":
                    pos = (50, 50)
                elif logo_pos == "haut-droite":
                    pos = (W - lw - 50, 50)
                else:
                    pos = ((W - lw)//2, 50)
                bg.paste(logo, pos, logo)
                print(f"[Fond] Logo appliqué: {logo_pos}")
            except Exception as e:
                print(f"[Fond] Erreur logo: {e}")

        out_path = os.path.join(TMP_DIR, f"fond_{uuid.uuid4().hex[:6]}.png")
        bg.save(out_path)
        print(f"[Fond] ✅ Fond créé avec succès: {out_path}")
        return out_path

    except Exception as e:
        print(f"[Fond] ❌ ERREUR CRITIQUE: {e}")
        print(f"[Fond] Traceback: {traceback.format_exc()}")
        try:
            emergency_bg = Image.new("RGB", (W, H), (0, 82, 147))
            out_path = os.path.join(TMP_DIR, f"emergency_fond_{uuid.uuid4().hex[:6]}.png")
            emergency_bg.save(out_path)
            print(f"[Fond] ✅ Fond d'urgence créé: {out_path}")
            return out_path
        except Exception as e2:
            print(f"[Fond] ❌ Même le fallback a échoué: {e2}")
            return None