#!/usr/bin/env python3
"""
Set up LINE Rich Menu for Stock Predictor bot.
Run once: python setup_rich_menu.py

Layout (2 columns x 2 rows = 4 buttons):
  [📊 查股票]  [🌐 開啟網站]
  [📈 預測]    [❓ 說明]
"""
import os, json, sys, urllib.request, urllib.error

TOKEN = os.environ.get("LINE_CHANNEL_ACCESS_TOKEN") or ""
SITE_URL = os.environ.get("STOCK_SITE_URL", "https://dennischan0909-dockerspace.hf.space")

if not TOKEN:
    # Try loading from .env in same dir
    env_file = os.path.join(os.path.dirname(__file__), ".env")
    if os.path.exists(env_file):
        for line in open(env_file):
            line = line.strip()
            if line.startswith("LINE_CHANNEL_ACCESS_TOKEN="):
                TOKEN = line.split("=", 1)[1].strip().strip('"').strip("'")
            if line.startswith("STOCK_SITE_URL="):
                SITE_URL = line.split("=", 1)[1].strip().strip('"').strip("'")

if not TOKEN:
    print("ERROR: LINE_CHANNEL_ACCESS_TOKEN not set")
    sys.exit(1)

HEADERS = {
    "Authorization": f"Bearer {TOKEN}",
    "Content-Type": "application/json",
}

def api(method: str, path: str, body=None):
    url = f"https://api.line.me{path}"
    data = json.dumps(body).encode() if body else None
    req = urllib.request.Request(url, data=data, headers=HEADERS, method=method)
    try:
        with urllib.request.urlopen(req) as r:
            return json.loads(r.read())
    except urllib.error.HTTPError as e:
        err = e.read().decode()
        print(f"  HTTP {e.code}: {err}")
        raise

# ── 1. Delete existing menus ──────────────────────────────────────────────────
print("Deleting existing rich menus...")
try:
    menus = api("GET", "/v2/bot/richmenu/list")
    for m in menus.get("richmenus", []):
        api("DELETE", f"/v2/bot/richmenu/{m['richMenuId']}")
        print(f"  Deleted {m['richMenuId']}")
except Exception as e:
    print(f"  (skip) {e}")

# ── 2. Create new menu ────────────────────────────────────────────────────────
W, H = 2500, 843          # LINE recommended size for 2-row menu
HALF_W = W // 2

menu_body = {
    "size": {"width": W, "height": H},
    "selected": True,
    "name": "Stock Menu",
    "chatBarText": "股票選單",
    "areas": [
        # Row 1 left — 查股票
        {
            "bounds": {"x": 0, "y": 0, "width": HALF_W, "height": H // 2},
            "action": {"type": "message", "text": "查股票"},
        },
        # Row 1 right — 開啟網站
        {
            "bounds": {"x": HALF_W, "y": 0, "width": HALF_W, "height": H // 2},
            "action": {"type": "uri", "uri": SITE_URL},
        },
        # Row 2 left — 預測
        {
            "bounds": {"x": 0, "y": H // 2, "width": HALF_W, "height": H // 2},
            "action": {"type": "message", "text": "預測"},
        },
        # Row 2 right — 說明
        {
            "bounds": {"x": HALF_W, "y": H // 2, "width": HALF_W, "height": H // 2},
            "action": {"type": "message", "text": "說明"},
        },
    ],
}

print("Creating rich menu...")
result = api("POST", "/v2/bot/richmenu", menu_body)
menu_id = result["richMenuId"]
print(f"  Created: {menu_id}")

# ── 3. Upload image ───────────────────────────────────────────────────────────
print("Uploading menu image...")
img_path = os.path.join(os.path.dirname(__file__), "rich_menu.png")

if not os.path.exists(img_path):
    # Generate a simple placeholder image with Pillow if available
    try:
        from PIL import Image, ImageDraw, ImageFont
        img = Image.new("RGB", (W, H), "#1a1a2e")
        draw = ImageDraw.Draw(img)
        labels = [
            ("📊 查股票",  HALF_W // 2,      H // 4),
            ("🌐 開啟網站", HALF_W + HALF_W // 2, H // 4),
            ("📈 預測",    HALF_W // 2,      H * 3 // 4),
            ("❓ 說明",    HALF_W + HALF_W // 2, H * 3 // 4),
        ]
        # Grid lines
        draw.line([(HALF_W, 0), (HALF_W, H)], fill="#444", width=4)
        draw.line([(0, H // 2), (W, H // 2)], fill="#444", width=4)
        # Labels
        try:
            font = ImageFont.truetype("arial.ttf", 80)
        except Exception:
            font = ImageFont.load_default()
        for text, x, y in labels:
            draw.text((x, y), text, fill="white", font=font, anchor="mm")
        img.save(img_path)
        print(f"  Generated placeholder image: {img_path}")
    except ImportError:
        print("  Pillow not installed — skipping auto-image generation")
        print(f"  Please place a 2500×843 PNG at: {img_path}")
        print("  Then re-run this script (it will skip menu creation and only upload image + set default).")
        # Set default anyway so menu structure is ready
        api("POST", f"/v2/bot/richmenu/{menu_id}/default")
        print(f"  Set as default (image pending). Menu ID: {menu_id}")
        sys.exit(0)

with open(img_path, "rb") as f:
    img_data = f.read()

img_req = urllib.request.Request(
    f"https://api-data.line.me/v2/bot/richmenu/{menu_id}/content",
    data=img_data,
    headers={**HEADERS, "Content-Type": "image/png"},
    method="POST",
)
try:
    with urllib.request.urlopen(img_req) as r:
        print(f"  Image uploaded: {r.status}")
except urllib.error.HTTPError as e:
    print(f"  Image upload failed: {e.code} {e.read().decode()}")

# ── 4. Set as default ─────────────────────────────────────────────────────────
print("Setting as default menu...")
api("POST", f"/v2/bot/user/all/richmenu/{menu_id}")
print(f"Done! Menu ID: {menu_id}")
print(f"Site URL: {SITE_URL}")