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

import SwiftUI

struct FormatterView: View {
    @State private var inputText: String = ""
    @State private var outputText: String = ""
    @State private var showCopied: Bool = false

    var body: some View {
        NavigationStack {
            VStack(spacing: 16) {
                TextEditor(text: $inputText)
                    .frame(minHeight: 120)
                    .padding(8)
                    .background(Color(.systemGray6))
                    .cornerRadius(8)
                    .overlay(
                        RoundedRectangle(cornerRadius: 8)
                            .stroke(Color(.systemGray4), lineWidth: 1)
                    )

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

                if !outputText.isEmpty {
                    VStack(alignment: .leading, spacing: 8) {
                        HStack {
                            Text("格式化结果")
                                .font(.subheadline)
                                .foregroundStyle(.secondary)
                            Spacer()
                            Button(action: copyOutput) {
                                Image(systemName: "doc.on.doc")
                            }
                        }

                        TextEditor(text: .constant(outputText))
                            .frame(minHeight: 120)
                            .padding(8)
                            .background(Color(.systemGray6))
                            .cornerRadius(8)
                            .overlay(
                                RoundedRectangle(cornerRadius: 8)
                                    .stroke(Color(.systemGray4), lineWidth: 1)
                            )
                    }
                }

                Spacer()
            }
            .padding()
            .navigationTitle("文案格式化")
            .overlay {
                if showCopied {
                    VStack {
                        Spacer()
                        Text("已复制")
                            .font(.subheadline)
                            .padding(.horizontal, 16)
                            .padding(.vertical, 8)
                            .background(Color.black.opacity(0.75))
                            .foregroundStyle(.white)
                            .cornerRadius(20)
                            .padding(.bottom, 32)
                    }
                    .transition(.opacity)
                }
            }
        }
    }

    private func formatText() {
        var content = inputText

        // 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")

        outputText = content
    }

    private func copyOutput() {
        UIPasteboard.general.string = outputText
        withAnimation {
            showCopied = true
        }
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) {
            withAnimation {
                showCopied = false
            }
        }
    }
}

#Preview {
    FormatterView()
}