"""BFA Banana Dryer — HMI Design Collaboration Tool"""
import os
import json
import time
import uuid
from flask import Flask, render_template, request, jsonify, send_from_directory

app = Flask(__name__)
LAYOUT_DIR = os.path.join(os.path.dirname(__file__), "layouts")
PHOTO_DIR = os.path.join(os.path.dirname(__file__), "static", "photos")
os.makedirs(LAYOUT_DIR, exist_ok=True)
os.makedirs(PHOTO_DIR, exist_ok=True)

CURRENT_LAYOUT = os.path.join(LAYOUT_DIR, "current.json")

def get_layout():
    if os.path.exists(CURRENT_LAYOUT):
        with open(CURRENT_LAYOUT) as f:
            return json.load(f)
    # First run — copy default
    default = os.path.join(LAYOUT_DIR, "default.json")
    with open(default) as f:
        layout = json.load(f)
    save_layout(layout)
    return layout

def save_layout(layout):
    with open(CURRENT_LAYOUT, "w") as f:
        json.dump(layout, f, indent=2)

@app.route("/")
def index():
    return render_template("editor.html")

@app.route("/api/layout", methods=["GET"])
def api_get_layout():
    return jsonify(get_layout())

@app.route("/api/layout", methods=["POST"])
def api_save_layout():
    layout = request.json
    save_layout(layout)
    return jsonify({"ok": True})

@app.route("/api/comment", methods=["POST"])
def api_add_comment():
    data = request.json
    layout = get_layout()
    comment = {
        "id": str(uuid.uuid4())[:8],
        "target": data["target"],
        "user": data["user"],
        "time": time.strftime("%Y-%m-%dT%H:%M:%S"),
        "text": data["text"]
    }
    layout.setdefault("comments", []).append(comment)
    save_layout(layout)
    return jsonify(comment)

@app.route("/api/users", methods=["POST"])
def api_add_user():
    name = request.json.get("name", "").strip()
    if not name:
        return jsonify({"error": "empty name"}), 400
    layout = get_layout()
    if name not in layout.get("users", []):
        layout.setdefault("users", []).append(name)
        save_layout(layout)
    return jsonify({"ok": True, "users": layout["users"]})

@app.route("/api/photo", methods=["POST"])
def api_upload_photo():
    if "file" not in request.files:
        return jsonify({"error": "no file"}), 400
    f = request.files["file"]
    fname = f"{int(time.time())}_{f.filename}"
    f.save(os.path.join(PHOTO_DIR, fname))
    return jsonify({"filename": fname, "url": f"/static/photos/{fname}"})

@app.route("/api/photos", methods=["GET"])
def api_list_photos():
    photos = sorted(os.listdir(PHOTO_DIR)) if os.path.exists(PHOTO_DIR) else []
    return jsonify([{"filename": p, "url": f"/static/photos/{p}"} for p in photos if not p.startswith(".")])

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=5001, debug=True)