import json, re

def format_json(text):
    try:
        obj = json.loads(text)
        return json.dumps(obj, indent=2, ensure_ascii=False)
    except Exception:
        return "JSON 格式错误，请检查输入"

def minify_json(text):
    try:
        obj = json.loads(text)
        return json.dumps(obj, separators=(',', ':'))
    except Exception:
        return "JSON 格式错误，请检查输入"

def validate_json(text):
    try:
        json.loads(text)
        return "✅ 有效的 JSON"
    except Exception as e:
        return f"❌ 格式错误: {str(e)}"

def page():
    from flask import render_template, request
    result = None
    action = request.args.get("action")
    text = request.args.get("text", "").strip()

    if text:
        if action == "format":
            result = format_json(text)
        elif action == "minify":
            result = minify_json(text)
        elif action == "validate":
            result = validate_json(text)
        else:
            result = format_json(text)
    else:
        result = None

    return render_template("json.html", result=result, text=text)