from flask import Flask, render_template, request, redirect, url_for
from urllib.parse import urlencode
import datetime

app = Flask(__name__)

def coerce_bool(val, default=False):
    if val is None:
        return default
    s = str(val).lower()
    return s in ("1","true","yes","y","on")

@app.template_filter("default_if_none")
def default_if_none(value, default):
    return default if value is None or value == "" else value

@app.route("/")
def index():
    # Prefill from query if present, so users can tweak and regenerate
    q = request.args
    context = {
        "title": q.get("title", "Big Day"),
        "target": q.get("target", ""),
        "scheme": q.get("scheme", "dark"),
        "accent": q.get("accent", "#8b5cf6"),  # violet-500
        "radius": q.get("radius", "16"),
        "shadow": q.get("shadow", "lg"),
        "font": q.get("font", "system-ui"),
        "show_millis": coerce_bool(q.get("millis"), False),
        "rounded_unit": q.get("rounded_unit", "none"),  # none, minutes, hours, days
        "bg": q.get("bg", "#0b0b10"),
        "fg": q.get("fg", "#e5e7eb"),
    }
    return render_template("index.html", **context)

@app.route("/preview", methods=["POST"])
def preview():
    data = request.form.to_dict(flat=True)
    # sanitize minimal
    # Build query string and redirect to /countdown
    return redirect(url_for("countdown") + "?" + urlencode(data))

@app.route("/countdown")
def countdown():
    q = request.args
    # Provide sane defaults if not supplied
    params = {
        "title": q.get("title", "Big Day"),
        "target": q.get("target", ""),
        "scheme": q.get("scheme", "dark"),
        "accent": q.get("accent", "#8b5cf6"),
        "radius": q.get("radius", "16"),
        "shadow": q.get("shadow", "lg"),
        "font": q.get("font", "system-ui"),
        "millis": q.get("millis", "0"),
        "rounded_unit": q.get("rounded_unit", "none"),
        "bg": q.get("bg", "#0b0b10"),
        "fg": q.get("fg", "#e5e7eb"),
    }
    # If no target specified, bounce user to setup screen
    if not params["target"]:
        return redirect(url_for("index"))
    return render_template("countdown.html", **params)

if __name__ == "__main__":
    # Helpful for local dev
    app.run(debug=True, host="0.0.0.0", port=5000)