//
//  AddressSheetUtils.swift
//  stripe-react-native
//
//  Created by Charles Cruzan on 10/12/22.
//

import Foundation
import StripePaymentSheet

class AddressSheetUtils {
    internal class func buildDefaultValues(params: NSDictionary?) -> AddressViewController.Configuration.DefaultAddressDetails {
        guard let params = params else {
            return AddressViewController.Configuration.DefaultAddressDetails()
        }

        return AddressViewController.Configuration.DefaultAddressDetails(
            address: buildAddress(params: params["address"] as? NSDictionary),
            name: params["name"] as? String,
            phone: params["phone"] as? String,
            isCheckboxSelected: params["isCheckboxSelected"] as? Bool
        )
    }

    internal class func buildAddressDetails(params: NSDictionary?) -> AddressViewController.AddressDetails {
        guard let params = params else { return AddressViewController.AddressDetails(address: buildAddress(params: nil)) }
        return AddressViewController.AddressDetails(
            address: buildAddress(params: params["address"] as? NSDictionary),
            name: params["name"] as? String,
            phone: params["phone"] as? String,
            isCheckboxSelected: params["isCheckboxSelected"] as? Bool)
    }

    internal class func buildAddress(params: NSDictionary?) -> PaymentSheet.Address {
        guard let params = params else { return PaymentSheet.Address() }
        return PaymentSheet.Address(
            city: params["city"] as? String,
            country: params["country"] as? String,
            line1: params["line1"] as? String,
            line2: params["line2"] as? String,
            postalCode: params["postalCode"] as? String,
            state: params["state"] as? String
        )
    }

    internal class func buildAddress(params: NSDictionary?) -> AddressViewController.AddressDetails.Address {
        guard let params = params else { return AddressViewController.AddressDetails.Address(country: "", line1: "") }
        return AddressViewController.AddressDetails.Address(
            city: params["city"] as? String,
            country: params["country"] as? String ?? "",
            line1: params["line1"] as? String ?? "",
            line2: params["line2"] as? String,
            postalCode: params["postalCode"] as? String,
            state: params["state"] as? String
        )
    }

    internal class func buildAdditionalFieldsConfiguration(params: NSDictionary?) -> AddressViewController.Configuration.AdditionalFields {
        guard let params = params else {
            return AddressViewController.Configuration.AdditionalFields(phone: .hidden, checkboxLabel: nil)
        }

        return AddressViewController.Configuration.AdditionalFields(
            phone: getFieldConfiguration(input: params["phoneNumber"] as? String, default: .hidden),
            checkboxLabel: params["checkboxLabel"] as? String
        )
    }

    internal class func getFieldConfiguration(input: String?, default: AddressViewController.Configuration.AdditionalFields.FieldConfiguration) -> AddressViewController.Configuration.AdditionalFields.FieldConfiguration {
        switch input {
        case "optional":
            return .optional
        case "required":
            return .required
        case "hidden":
            return .hidden
        default:
            return `default`
        }
    }

    internal class func buildConfiguration(
        appearance: NSDictionary?,
        defaultValues: NSDictionary?,
        additionalFields: NSDictionary?,
        allowedCountries: [String],
        autocompleteCountries: [String],
        buttonTitle: String?,
        sheetTitle: String?
    ) throws -> AddressViewController.Configuration {
        let appearanceConfiguration = try PaymentSheetAppearance.buildAppearanceFromParams(userParams: appearance)

        var config = AddressViewController.Configuration(
            defaultValues: buildDefaultValues(params: defaultValues),
            additionalFields: buildAdditionalFieldsConfiguration(params: additionalFields),
            allowedCountries: allowedCountries,
            appearance: appearanceConfiguration,
            buttonTitle: buttonTitle,
            title: sheetTitle
        )
        config.autocompleteCountries = autocompleteCountries
        return config
    }

    internal class func buildResult(address: AddressViewController.AddressDetails) -> [AnyHashable: Any] {
        return [
            "result": [
                "name": address.name ?? NSNull(),
                "address": [
                    "country": address.address.country,
                    "state": address.address.state,
                    "line1": address.address.line1,
                    "line2": address.address.line2,
                    "postalCode": address.address.postalCode,
                    "city": address.address.city,
                ],
                "phone": address.phone ?? NSNull(),
                "isCheckboxSelected": address.isCheckboxSelected ?? NSNull(),
            ] as [AnyHashable: Any],
        ]
    }

}