import SwiftUI

struct LoginView: View {
    @Environment(AuthSession.self) private var auth

    @State private var email = ""
    @State private var password = ""

    var body: some View {
        VStack(spacing: 24) {
            Spacer()

            Image(systemName: "pawprint.fill")
                .font(.system(size: 80))
                .foregroundStyle(Color.accentColor)

            VStack(spacing: 6) {
                Text("Ban Yaro Go")
                    .font(.largeTitle.bold())
                Text("Melde dich mit deinem banyaro-Account an.")
                    .font(.callout)
                    .foregroundStyle(.secondary)
                    .multilineTextAlignment(.center)
            }

            VStack(spacing: 12) {
                TextField("E-Mail", text: $email)
                    .textContentType(.emailAddress)
                    .keyboardType(.emailAddress)
                    .textInputAutocapitalization(.never)
                    .autocorrectionDisabled()
                    .padding()
                    .background(.background.secondary, in: RoundedRectangle(cornerRadius: 12))

                SecureField("Passwort", text: $password)
                    .textContentType(.password)
                    .padding()
                    .background(.background.secondary, in: RoundedRectangle(cornerRadius: 12))
            }

            if let error = auth.errorMessage {
                Text(error)
                    .font(.footnote)
                    .foregroundStyle(.red)
                    .multilineTextAlignment(.center)
            }

            Button {
                Task {
                    await auth.login(
                        email: email.trimmingCharacters(in: .whitespacesAndNewlines),
                        password: password
                    )
                }
            } label: {
                Group {
                    if auth.isLoggingIn {
                        ProgressView().tint(.white)
                    } else {
                        Text("Login").bold()
                    }
                }
                .frame(maxWidth: .infinity, minHeight: 50)
            }
            .background(Color.accentColor, in: RoundedRectangle(cornerRadius: 12))
            .foregroundStyle(.white)
            .disabled(auth.isLoggingIn || email.isEmpty || password.isEmpty)

            registrationHint

            Spacer()
        }
        .padding(.horizontal, 28)
    }

    private var registrationHint: some View {
        VStack(spacing: 6) {
            Text("Noch kein Account?")
                .font(.footnote)
                .foregroundStyle(.secondary)
            if let url = URL(string: "https://banyaro.app/#settings?tab=register") {
                Link(destination: url) {
                    HStack(spacing: 6) {
                        Text("Kostenlos bei banyaro.app registrieren")
                            .font(.footnote.bold())
                        Image(systemName: "arrow.up.right.square")
                            .font(.caption)
                    }
                    .foregroundStyle(Color.accentColor)
                }
            }
        }
    }
}

#Preview {
    LoginView()
        .environment(AuthSession())
}