gramora/gramora/Views/ParaphrasingView.swift

import SwiftUI

struct ParaphrasingView: View {
    @StateObject private var viewModel = ParaphrasingViewModel()

    var body: some View {
        GeometryReader { proxy in
            let dynamicHorizontalPadding = min(max(proxy.size.width * 0.045, AppTheme.contentPadding), 52)
            let dynamicTopPadding = min(max(proxy.size.height * 0.05, 24), 44)
            let dynamicBottomPadding = min(max(proxy.size.height * 0.06, 28), 56)
            let dynamicEditorHeight = min(max(proxy.size.height * 0.43, 260), 560)

            ScrollView(.vertical, showsIndicators: false) {
                VStack(alignment: .leading, spacing: 0) {
                    header
                        .padding(.bottom, 28)

                    contentCard(editorHeight: dynamicEditorHeight)
                        .padding(.bottom, 24)

                    GradientButton(title: "Paraphrase") {
                        viewModel.paraphrase()
                    }
                }
                .frame(maxWidth: 1200, alignment: .topLeading)
                .frame(maxWidth: .infinity, alignment: .topLeading)
                .padding(.horizontal, dynamicHorizontalPadding)
                .padding(.top, dynamicTopPadding)
                .padding(.bottom, dynamicBottomPadding)
            }
        }
        .onChange(of: viewModel.text) { newValue in
            if newValue.count > ParaphrasingViewModel.maxCharacters {
                viewModel.text = String(newValue.prefix(ParaphrasingViewModel.maxCharacters))
            }
        }
    }

    private var header: some View {
        HStack(alignment: .top) {
            VStack(alignment: .leading, spacing: 8) {
                Text("Paraphrasing")
                    .font(.system(size: 30, weight: .bold))
                    .foregroundStyle(AppTheme.textPrimary)

                HStack(spacing: 0) {
                    Text("Say it ")
                        .foregroundStyle(AppTheme.textSecondary)
                    Text("differently")
                        .fontWeight(.semibold)
                        .foregroundStyle(AppTheme.teal)
                    Text(". Keep it ")
                        .foregroundStyle(AppTheme.textSecondary)
                    Text("yours")
                        .fontWeight(.semibold)
                        .foregroundStyle(AppTheme.teal)
                    Text(".")
                        .foregroundStyle(AppTheme.textSecondary)
                }
                .font(.system(size: 15))
            }

            Spacer()

            IconButton {
                SettingsGearIcon()
            } action: {}
            .accessibilityLabel("Settings")
        }
    }

    private func contentCard(editorHeight: CGFloat) -> some View {
        VStack(alignment: .leading, spacing: 16) {
            Image("YourContentLogo")
                .resizable()
                .aspectRatio(contentMode: .fit)
                .frame(height: 52, alignment: .topLeading)
                .frame(height: 46, alignment: .topLeading)
                .clipped()
                .accessibilityLabel("Your Content")

            ZStack(alignment: .bottomTrailing) {
                ThinCaretTextEditor(text: $viewModel.text)
                    .font(.system(size: 14))
                    .foregroundStyle(AppTheme.textPrimary)
                    .frame(minHeight: editorHeight, idealHeight: editorHeight)
                    .background(Color.white)
                    .clipShape(RoundedRectangle(cornerRadius: AppTheme.inputCornerRadius))
                    .overlay(
                        RoundedRectangle(cornerRadius: AppTheme.inputCornerRadius)
                            .stroke(AppTheme.inputBorder, lineWidth: 1)
                    )
                    .overlay(alignment: .topLeading) {
                        if viewModel.text.isEmpty {
                            Text("Type or paste your text here and press the paraphrase button...")
                                .font(.system(size: 14))
                                .foregroundStyle(AppTheme.textMuted)
                                .padding(.leading, AppTheme.textEditorHorizontalInset)
                                .padding(.top, AppTheme.textEditorVerticalInset)
                                .allowsHitTesting(false)
                        }
                    }

                Text(viewModel.characterCountLabel)
                    .font(.system(size: 11))
                    .foregroundStyle(AppTheme.textMuted)
                    .padding(.trailing, 16)
                    .padding(.bottom, 12)
            }

            HStack(spacing: 8) {
                ToolbarButton(title: "Paste Text", iconName: "doc.on.clipboard") {
                    viewModel.pasteText()
                }

                ToolbarButton(title: "Upload File", iconName: "square.and.arrow.up") {}

                Spacer()

                ClearButton {
                    viewModel.clearText()
                }
            }
        }
        .padding(22)
        .background(AppTheme.cardBackground)
        .clipShape(RoundedRectangle(cornerRadius: AppTheme.cardCornerRadius))
        .overlay(
            RoundedRectangle(cornerRadius: AppTheme.cardCornerRadius)
                .stroke(AppTheme.border, lineWidth: 1)
        )
        .shadow(color: AppTheme.cardShadow, radius: 16, y: 6)
    }
}