import SwiftUI
import SFSafeSymbols
import PhoneNumberKit

private let emailPattern = #"^\S+@\S+\.\S+$"#

struct TopView: View {

    let info: TopInfo

    let style: HeaderStyle

    let accent: Color
    
    private let phoneNumberKit = PhoneNumberKit()
    
    var isValidEmail: Bool {
        info.email.range(of: emailPattern, options: .regularExpression) != nil
    }
    
    var isValidPhoneNumber: Bool {
        do {
            _ = try phoneNumberKit.parse(info.phone)
            return true
        } catch {
            return false
        }
    }

    var body: some View {
        GeometryReader { geo in
            let sideWidth = max(0, (geo.size.width - geo.size.height) / 2)
            HStack(spacing: 0) {
                VStack(alignment: .leading, spacing: 0) {
                    Text(info.name)
                        .font(.title)
                        .foregroundColor(accent)
                    Spacer(minLength: 0)
                    Text(info.tagLine)
                        .font(.subheadline)
                        .padding(.trailing, style.imageShadowSize)
                    Spacer(minLength: 0)
                    HStack {
                        RightImageLabel(info.place, systemSymbol: .house)
                        RightImageLabel(info.ageText, systemSymbol: .hourglass)
                        Spacer()
                    }.font(.subheadline)
                }
                .frame(width: sideWidth)
                TopViewImage(
                    image: info.imageName,
                    shadow: style.imageShadowSize,
                    lineWidth: style.imageBorderWidth)
                VStack(alignment: .trailing) {
                    LeftImageLabel(systemSymbol: .globe) {
                        Link(info.web, destination: URL(string: "https://" + info.web)!)
                    }
                    .frame(maxHeight: style.iconHeight)
                    Spacer()
                    LeftImageLabel(systemSymbol: .envelope) {
                        Link(info.email, destination: URL(string: "mailto:" + info.email)!)
                            .disabled(!isValidEmail)
                    }
                    .frame(maxHeight: style.iconHeight)
                    Spacer()
                    LeftImageLabel(systemSymbol: .phone) {
                        Link(info.phone, destination: URL(string: "tel:" + info.phone)!)
                            .disabled(!isValidPhoneNumber)
                    }
                    .frame(maxHeight: style.iconHeight)
                    Spacer()
                    HStack(spacing: 0) {
                        Spacer()
                        Link(info.github, destination: URL(string: "https://" + info.github)!)
                        Image("Github")
                            .resizable()
                            .aspectRatio(1.0, contentMode: .fit)
                            .padding(2)
                            .frame(width: style.iconHeight)
                    }.frame(maxHeight: style.iconHeight)
                }
                .font(.subheadline)
                .frame(width: sideWidth)
                .foregroundStyle(.primary)
            }
        }
    }
}

struct TopView_Previews: PreviewProvider {
    static var previews: some View {
        TopView(info: .init(
            imageName: "Cover",
            name: "Christoph Hagen",
            tagLine: "Problem solver with a favour for interdisciplinary work.",
            place: "Würzburg, Germany",
            ageText: "Age 32",
            web: "christophhagen.de",
            email: "jobs@christophhagen.de",
            phone: "Upon Request",
            github: "github.com/christophhagen"),
                style: HeaderStyle(),
                accent: .orange)
        .previewLayout(.fixed(width: 540, height: 120))
    }
}