//
//  ProfileMapper.swift
//  backoffice
//
//  Created by Sergey Butorin on 28/11/2018.
//  Copyright © 2018 Eruditor Group. All rights reserved.
//

final class ProfileMapper: ProfileMapperInput {

    func mapProfileScreen(from json: JsonDict) -> GeneralProfile? {
        guard let header: ProfileHeaderSectionItem = mapProfileHeaderItem(json: json),
            let itemsData = array(json, "items"),
            let contactItem: ProfileContactSectionItem = mapProfileContactItem(json: json),
            let linksData = array(json, "links")
            else { return nil }

        var profile = GeneralProfile()

        var headerSection = ProfileSection()
        headerSection.type = .header
        headerSection.items = [header]
        profile.sections.append(headerSection)

        let infoItems: [ProfileInfoSectionItem] = itemsData.compactMap { mapProfileInfoItem(itemData: $0) }
        var infoSection = ProfileSection()
        infoSection.type = .info
        infoSection.items = infoItems
        profile.sections.append(infoSection)

        var contactSection = ProfileSection()
        contactSection.type = .contacts
        contactSection.items = [contactItem]
        profile.sections.append(contactSection)

        let linkItems: [ProfileLinkSectionItem] = linksData.compactMap { mapProfileLinkItem(itemData: $0) }
        var linkSection = ProfileSection()
        linkSection.type = .links
        linkSection.items = linkItems
        profile.sections.append(linkSection)

        return profile
    }

    func mapProfileAboutScreen(from json: JsonDict) -> ProfileAbout? {
        guard let itemsData = array(json, "items") else { return nil }

        var profileAbout = ProfileAbout()
        profileAbout.items = itemsData.compactMap { mapProfileAboutItem(itemData: $0) }

        return profileAbout
    }

}

// MARK: Element mappers

extension ProfileMapper {

    private func mapProfileHeaderItem(json: JsonDict) -> ProfileHeaderSectionItem? {
        guard let name = string(json, "name"),
            let rating = string(json, "rating"),
            let reviews = string(json, "reviews"),
            let balance = string(json, "balance")
            else { return nil }

        var header = ProfileHeaderSectionItem()
        header.name = name
        header.rating = rating
        header.reviewsCount = reviews
        header.balance = balance

        if let avatarUrlString = string(json, "avatar"),
            let avatarUrl = URL(string: avatarUrlString) {
            header.avatarUrl = avatarUrl
        }

        return header
    }

    private func mapProfileInfoItem(itemData: JsonDict) -> ProfileInfoSectionItem? {
        guard let code = string(itemData, "code"),
            let type = GeneralProfileItemType(rawValue: code),
            let title = string(itemData, "title"),
            let description = string(itemData, "text")
            else { return nil }

        var sectionItem = ProfileInfoSectionItem()
        sectionItem.type = type
        sectionItem.title = title
        sectionItem.description = description

        return sectionItem
    }

    private func mapProfileContactItem(json: JsonDict) -> ProfileContactSectionItem? {
        guard let contactDescription = string(json, "videoText"),
            let contactMail = string(json, "videoMail")
            else { return nil }

        var contactItem = ProfileContactSectionItem()
        contactItem.description = contactDescription
        contactItem.mail = contactMail

        return contactItem
    }

    private func mapProfileLinkItem(itemData: JsonDict) -> ProfileLinkSectionItem? {
        guard let typeString = string(itemData, "type"),
            let type = ProfileLinkType(rawValue: typeString),
            let urlString = string(itemData, "target"),
            let url = URL(string: urlString),
            let title = string(itemData, "name")
            else { return nil }

        var link = Link()
        link.targetUrl = url
        link.title = title

        var linkItem = ProfileLinkSectionItem()
        linkItem.type = type
        linkItem.link = link

        return linkItem
    }

    private func mapProfileAboutItem(itemData: JsonDict) -> ProfileAboutItem? {
        guard let typeString = string(itemData, "code"),
            let type = ProfileAboutItemType(rawValue: typeString),
            let title = string(itemData, "title"),
            let text = string(itemData, "text"),
            let placeholder = string(itemData, "placeholder")
            else { return nil }

        var aboutItem = ProfileAboutItem()
        aboutItem.type = type
        aboutItem.title = title
        aboutItem.text = text
        aboutItem.placeholder = placeholder

        return aboutItem
    }

}