//
//  FormatLogViewController.swift
//  Note
//
//  Created by fish on 2026/7/12.
//

import UIKit

class FormatLogViewController: UIViewController {

    private var textView: UITextView!
    private var formatButton: UIButton!
    private var doneButton: UIBarButtonItem!

    override func viewDidLoad() {
        super.viewDidLoad()
        title = "格式化日志"
        navigationItem.largeTitleDisplayMode = .never
        view.backgroundColor = .systemGroupedBackground
        setupUI()
    }

    private func setupUI() {
        textView = UITextView()
        textView.translatesAutoresizingMaskIntoConstraints = false
        textView.font = UIFont.systemFont(ofSize: 16)
        textView.backgroundColor = .white
        textView.layer.cornerRadius = 12
        textView.textContainerInset = UIEdgeInsets(top: 12, left: 12, bottom: 12, right: 12)
        textView.delegate = self
        view.addSubview(textView)

        doneButton = UIBarButtonItem(title: "完成", style: .prominent, target: self, action: #selector(didTapDoneButton))

        formatButton = UIButton(type: .system)
        formatButton.translatesAutoresizingMaskIntoConstraints = false
        formatButton.setTitle("格式化", for: .normal)
        formatButton.titleLabel?.font = UIFont.systemFont(ofSize: 18, weight: .semibold)
        formatButton.backgroundColor = .systemBlue
        formatButton.setTitleColor(.white, for: .normal)
        formatButton.layer.cornerRadius = 12
        formatButton.addTarget(self, action: #selector(didTapFormatButton), for: .touchUpInside)
        view.addSubview(formatButton)

        NSLayoutConstraint.activate([
            textView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 16),
            textView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 16),
            textView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -16),
            textView.bottomAnchor.constraint(equalTo: formatButton.topAnchor, constant: -16),

            formatButton.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 16),
            formatButton.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -16),
            formatButton.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -16),
            formatButton.heightAnchor.constraint(equalToConstant: 52)
        ])
    }

    @objc private func didTapDoneButton() {
        textView.resignFirstResponder()
    }

    @objc private func didTapFormatButton() {
        textView.text = formatLog(textView.text)
    }

    private func formatLog(_ text: String) -> String {
        var content = text

        content = content.replacingOccurrences(of: "# ", with: "")
        content = content.replacingOccurrences(of: "#", with: "")
        content = content.replacingOccurrences(of: ";", with: "。")
        content = content.replacingOccurrences(of: "；", with: "。")
        content = content.replacingOccurrences(of: ".", with: "。")
        content = content.replacingOccurrences(of: "（", with: "(")
        content = content.replacingOccurrences(of: "）", with: ")")
        content = content.replacingOccurrences(of: "?", with: "？")
        content = content.replacingOccurrences(of: ",", with: "，")
        content = content.replacingOccurrences(of: ":", with: "：")
        content = content.replacingOccurrences(of: "日星期", with: "日 星期")
        content = "# " + content
        content = content.replacingOccurrences(of: "一、生活方面", with: "## 一、生活方面")
        content = content.replacingOccurrences(of: "二、交易方面", with: "## 二、交易方面")
        content = content.replacingOccurrences(of: "三、工作方面", with: "## 三、工作方面")

        return content
    }
}

extension FormatLogViewController: UITextViewDelegate {

    func textViewDidBeginEditing(_ textView: UITextView) {
        navigationItem.rightBarButtonItem = doneButton
    }

    func textViewDidEndEditing(_ textView: UITextView) {
        navigationItem.rightBarButtonItem = nil
    }
}