//
//  RetenoEvent.swift
//  RetenoSdk
//
//  Created by Valentyn Halkin on 23.03.2023.
//  Copyright © 2023 Facebook. All rights reserved.
//

import Foundation
import Reteno

struct RetenoCustomEventParameter: Codable {
    init(dictionary: [String: Any]?) throws {
        self = try JSONDecoder().decode(RetenoCustomEventParameter.self, from: JSONSerialization.data(withJSONObject: dictionary ?? [:]))
    }
    let name: String;
    let value: String?;
}

struct RetenoCustomEvent: Codable {
    init(dictionary: [String: Any]?) throws {
        self = try JSONDecoder().decode(RetenoCustomEvent.self, from: JSONSerialization.data(withJSONObject: dictionary ?? [:]))
    }
    let eventName: String;
    let date: String;
    let parameters: [RetenoCustomEventParameter];
    let forcePush: Bool?;
}

public struct RetenoEventPayload: Codable {
    init(eventName: String, stringDate: String, parameters: [RetenoCustomEventParameter], forcePush: Bool?) {
        self.eventName = eventName;

        let dateFormatter = ISO8601DateFormatter();
        self.date = dateFormatter.date(from: stringDate) ?? Date();

        self.forcePush = forcePush == nil ? false : forcePush!;
        
        var paramArr = [Event.Parameter]();
        for param in parameters {
            paramArr.append(Event.Parameter(name: param.name, value: param.value ?? ""));
        }
        self.parameters = paramArr;
    }

    let eventName: String;
    let date: Date;
    let parameters: [Event.Parameter];
    let forcePush: Bool;
}

public struct RetenoEvent {
    private init() {}
    
    private static func getStringOrNil(input: String?) -> String? {
        return (input ?? "").isEmpty ? nil : input!
    }
    
    public static func buildEventPayload(payload: NSDictionary) throws -> RetenoEventPayload {
        let data = payload as? [String: Any];
        do {
            let payloadStruct = try RetenoCustomEvent(dictionary: data);
            let requestPayload = RetenoEventPayload(
                eventName: payloadStruct.eventName,
                stringDate: payloadStruct.date,
                parameters: payloadStruct.parameters,
                forcePush: payloadStruct.forcePush
            );
            
            return requestPayload;
        } catch {
            throw error;
        }
    }
}