//
// Copyright 2026 Novaloop AG
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
// Please see LICENSE files in the repository root for full details.
//

import Compound
import SwiftUI

/// The HealthChat profile fields shown below the header on the profile screens.
/// Renders nothing while loading and for profiles without any HealthChat fields.
struct HealthChatExtendedProfileSection: View {
    @State private var loader: HealthChatExtendedProfileLoader
    
    init(userID: String, service: ExtendedProfileServiceProtocol) {
        _loader = State(initialValue: HealthChatExtendedProfileLoader(userID: userID, service: service))
    }
    
    init(loader: HealthChatExtendedProfileLoader) {
        _loader = State(initialValue: loader)
    }
    
    var body: some View {
        if let profile = loader.profile {
            Section {
                if let title = profile.title {
                    row(label: HealthChatL10n.commonAcademicTitle, value: title)
                }
                if let specialty = profile.specialty {
                    row(label: HealthChatL10n.commonSpecialty, value: specialty)
                }
                if let practiceName = profile.practiceName {
                    row(label: HealthChatL10n.commonPracticeName, value: practiceName)
                }
                if let address = profile.formattedAddress {
                    row(label: HealthChatL10n.commonAddress, value: address)
                }
                if let businessEmail = profile.businessEmail {
                    linkRow(label: HealthChatL10n.commonBusinessEmail,
                            value: businessEmail,
                            url: URL(string: "mailto:\(businessEmail)"))
                }
                if let businessTel = profile.businessTel {
                    linkRow(label: HealthChatL10n.commonBusinessTel,
                            value: businessTel,
                            url: URL(string: "tel:\(businessTel.filter { !$0.isWhitespace })"))
                }
                if let website = profile.website {
                    linkRow(label: HealthChatL10n.commonWebsite,
                            value: website,
                            url: websiteURL(for: website))
                }
                if let furtherInfo = profile.furtherInfo {
                    row(label: HealthChatL10n.commonFurtherInfo, value: furtherInfo)
                }
            }
        }
    }
    
    // MARK: - Private
    
    private func row(label: String, value: String) -> some View {
        ListRow(kind: .custom {
            rowContent(label: label, value: value, valueColor: .compound.textPrimary)
        })
    }
    
    private func linkRow(label: String, value: String, url: URL?) -> some View {
        ListRow(kind: .custom {
            Button {
                guard let url else { return }
                UIApplication.shared.open(url)
            } label: {
                rowContent(label: label, value: value, valueColor: .compound.textLinkExternal)
            }
        })
    }
    
    private func rowContent(label: String, value: String, valueColor: Color) -> some View {
        VStack(alignment: .leading, spacing: 2) {
            Text(label)
                .font(.compound.bodySM)
                .foregroundColor(.compound.textSecondary)
            Text(value)
                .font(.compound.bodyLG)
                .foregroundColor(valueColor)
        }
        .frame(maxWidth: .infinity, alignment: .leading)
        .padding(.horizontal, ListRowPadding.horizontal)
        .padding(.vertical, 8)
    }
    
    private func websiteURL(for website: String) -> URL? {
        guard let url = URL(string: website) else {
            return nil
        }
        return url.scheme == nil ? URL(string: "https://\(website)") : url
    }
}

// MARK: - Previews

struct HealthChatExtendedProfileSection_Previews: PreviewProvider, TestablePreview {
    static let fullProfile = try? JSONDecoder().decode(ExtendedProfile.self, from: Data("""
    {
        "displayname": "Dr. Alice Alpha",
        "io.element.profile.title": "Dr. med.",
        "io.element.profile.specialization": "Physiotherapie",
        "io.element.profile.practice_name": "Praxis Alpha",
        "io.element.profile.business_street": "Friedaustrasse",
        "io.element.profile.business_street_nr": "17",
        "io.element.profile.business_plz": "8003",
        "io.element.profile.business_city": "Zürich",
        "io.element.profile.business_email": "praxis@example.ch",
        "io.element.profile.business_tel": "+41 44 123 45 67",
        "io.element.profile.website": "https://example.ch",
        "io.element.profile.further_info": "Krankenkassen-anerkannt\\nHausbesuche möglich"
    }
    """.utf8))
    
    static let contactOnlyProfile = try? JSONDecoder().decode(ExtendedProfile.self, from: Data("""
    { "io.element.profile.business_tel": "+41 44 123 45 67" }
    """.utf8))
    
    static var previews: some View {
        Form {
            HealthChatExtendedProfileSection(loader: .init(profile: fullProfile))
        }
        .compoundList()
        .previewDisplayName("Full profile")
        
        Form {
            HealthChatExtendedProfileSection(loader: .init(profile: contactOnlyProfile))
        }
        .compoundList()
        .previewDisplayName("Contact only")
    }
}