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

import SwiftUI

struct FormatterView: View {
    @State private var inputText: String = ""
    @State private var resultText: String?
    @State private var showEmptyAlert: Bool = false

    var body: some View {
        NavigationStack {
            VStack(spacing: 16) {
                TextEditor(text: $inputText)
                    .frame(minHeight: 160)
                    .padding(8)
                    .background(Color(.systemGray6))
                    .cornerRadius(8)
                    .overlay(
                        RoundedRectangle(cornerRadius: 8)
                            .stroke(Color(.systemGray4), lineWidth: 1)
                    )

                Button(action: formatAndNavigate) {
                    Label("格式化", systemImage: "wand.and.stars")
                        .font(.headline)
                        .frame(maxWidth: .infinity)
                        .padding()
                        .background(Color.accentColor)
                        .foregroundStyle(.white)
                        .cornerRadius(10)
                }

                Spacer()
            }
            .padding()
            .navigationTitle("文案格式化")
            .background(Color(hex: "f2f2f7").ignoresSafeArea())
            .navigationDestination(item: $resultText) { text in
                ResultView(formattedText: text)
            }
            .alert("提示", isPresented: $showEmptyAlert) {
                Button("确定", role: .cancel) {}
            } message: {
                Text("请输入需要格式化的文案")
            }
        }
    }

    private func formatAndNavigate() {
        if inputText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
            showEmptyAlert = true
            return
        }
        resultText = format(inputText)
    }

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

        // 去 #
        content = content.replacingOccurrences(of: "# ", with: "")
        content = content.replacingOccurrences(of: "#", with: "")
        // 将 ; 转为句号
        content = content.replacingOccurrences(of: ";", with: "。")
        // 将 ； 转为句号
        content = content.replacingOccurrences(of: "；", with: "。")
        // 将 . 转为句号
        content = content.replacingOccurrences(of: ".", with: "。")
        // 将 （ 转为 (
        content = content.replacingOccurrences(of: "（", with: "(")
        // 将 ） 转为 )
        content = content.replacingOccurrences(of: "）", with: ")")
        // 将 ? 转为 ？
        content = content.replacingOccurrences(of: "?", with: "？")
        // 将 , 转为 ，
        content = content.replacingOccurrences(of: ",", with: "，")
        // 将 : 转为 ：
        content = content.replacingOccurrences(of: ":", with: "：")
        // 将 日星期 转为 日 星期
        content = content.replacingOccurrences(of: "日星期", with: "日 星期")
        // 在第一行插入 #
        content = "# " + content
        // 标题设置
        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
    }
}

#Preview {
    FormatterView()
}