import tkinter as tk
from tkinter import ttk
from tkinter import messagebox

def create_ui(parent, run_callback):
    """创建前端界面：两个输入框、数值比较勾选框、分隔符选择、忽略微小差异选项、输出框、运行和清空按钮"""
    frame = ttk.Frame(parent)
    frame.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
    frame.columnconfigure(1, weight=1)
    frame.rowconfigure(5, weight=1)

    ttk.Label(frame, text="比较两个字符串的元素差异").grid(
        row=0, column=0, columnspan=2, sticky=tk.W, pady=5
    )

    ttk.Label(frame, text="字符串1：").grid(row=1, column=0, sticky=tk.W, pady=2)
    input_entry1 = tk.Text(frame, height=4, width=50)
    input_entry1.grid(row=1, column=1, sticky=(tk.W, tk.E), pady=2)

    ttk.Label(frame, text="字符串2：").grid(row=2, column=0, sticky=tk.W, pady=2)
    input_entry2 = tk.Text(frame, height=4, width=50)
    input_entry2.grid(row=2, column=1, sticky=(tk.W, tk.E), pady=2)

    ttk.Label(frame, text="分隔符：").grid(row=3, column=0, sticky=tk.W, pady=2)
    separator_var = tk.StringVar(value=",")
    separator_menu = ttk.OptionMenu(
        frame,
        separator_var,
        ",",
        ",", ";", "\\n", "空格"
    )
    separator_menu.grid(row=3, column=1, sticky=tk.W, pady=2)

    numeric_var = tk.BooleanVar(value=False)
    ttk.Checkbutton(frame, text="启用数值比较", variable=numeric_var).grid(
        row=3, column=1, sticky=tk.E, pady=2
    )

    ignore_tiny_diff_var = tk.BooleanVar(value=False)
    ignore_tiny_diff_check = ttk.Checkbutton(
        frame, text="忽略微小差异", variable=ignore_tiny_diff_var,
        command=lambda: numeric_var.set(True) if ignore_tiny_diff_var.get() else None
    )
    ignore_tiny_diff_check.grid(row=4, column=1, sticky=tk.E, pady=2)

    ttk.Label(frame, text="比较结果：").grid(row=5, column=0, sticky=tk.NW, pady=2)
    output_text = tk.Text(frame, height=4, width=50, state="disabled")
    output_text.grid(row=5, column=1, sticky=(tk.W, tk.E, tk.N, tk.S), pady=2)
    output_scroll = ttk.Scrollbar(frame, orient=tk.VERTICAL, command=output_text.yview)
    output_scroll.grid(row=5, column=2, sticky=(tk.N, tk.S))
    output_text["yscrollcommand"] = output_scroll.set

    def run():
        input1 = input_entry1.get("1.0", tk.END).strip()
        input2 = input_entry2.get("1.0", tk.END).strip()
        if not input1 or not input2:
            messagebox.showerror("错误", "请输入两个字符串")
            return
        separator = separator_var.get()
        if separator == "空格":
            separator = " "
        try:
            input_list = [
                input1,
                input2,
                separator,
                str(numeric_var.get()).lower(),
                str(ignore_tiny_diff_var.get()).lower()
            ]
            result = run_callback(input_list)
            output_text.configure(state="normal")
            output_text.delete("1.0", tk.END)
            if result and result[0]:
                output_text.insert("1.0", result[0])
            else:
                output_text.insert("1.0", "无结果")
            output_text.configure(state="disabled")
        except Exception as e:
            messagebox.showerror("错误", f"运行脚本失败：{str(e)}")

    def clear():
        input_entry1.delete("1.0", tk.END)
        input_entry2.delete("1.0", tk.END)
        output_text.configure(state="normal")
        output_text.delete("1.0", tk.END)
        output_text.configure(state="disabled")
        numeric_var.set(False)
        ignore_tiny_diff_var.set(False)
        separator_var.set(",")

    ttk.Button(frame, text="运行脚本", command=run).grid(row=6, column=0, pady=5)
    ttk.Button(frame, text="清空", command=clear).grid(row=6, column=1, sticky=tk.W, pady=5)

    return frame