//
//  ContentAllViewModel.swift
//  SodaLive
//
//  Created by klaus on 11/14/25.
//

import Foundation
import Combine

final class ContentAllViewModel: ObservableObject {
    enum Sort: String {
        case NEWEST, POPULARITY
    }
    
    private let repository = ContentRepository()
    private var subscription = Set<AnyCancellable>()
    
    @Published var errorMessage = ""
    @Published var isShowPopup = false
    @Published var isLoading = false
    
    @Published var themeList = [String]()
    @Published var contentList = [AudioContentMainItem]()
    
    @Published var sort = Sort.NEWEST {
        didSet {
            page = 1
            isLast = false
            contentList.removeAll()
            fetchData()
        }
    }
    
    @Published var selectedTheme = I18n.Category.all {
        didSet {
            page = 1
            isLast = false
            contentList.removeAll()
            fetchData()
        }
    }
    
    var page = 1
    var isLast = false
    private let pageSize = 20
    
    var isFree: Bool = false
    var isPointAvailableOnly: Bool = false
    
    func fetchData() {
        if !isLast && !isLoading {
            isLoading = true
            
            repository.getAllAudioContents(page: page, size: pageSize, isFree: isFree, isPointAvailableOnly: isPointAvailableOnly, sortType: sort, theme: selectedTheme == I18n.Category.all ? nil : selectedTheme)
                .sink { result in
                    switch result {
                    case .finished:
                        DEBUG_LOG("finish")
                    case .failure(let error):
                        ERROR_LOG(error.localizedDescription)
                    }
                } receiveValue: { [unowned self] response in
                    self.isLoading = false
                    let responseData = response.data
                    
                    do {
                        let jsonDecoder = JSONDecoder()
                        let decoded = try jsonDecoder.decode(ApiResponse<[AudioContentMainItem]>.self, from: responseData)
                        self.isLoading = false
                        
                        if let data = decoded.data, decoded.success {
                            if page == 1 {
                                contentList.removeAll()
                            }
                            
                            if !data.isEmpty {
                                page += 1
                                self.contentList.append(contentsOf: data)
                            } else {
                                isLast = true
                            }
                        } else {
                            if let message = decoded.message {
                                self.errorMessage = message
                            } else {
                                self.errorMessage = I18n.Common.commonError
                            }
                            
                            self.isShowPopup = true
                        }
                    } catch {
                        self.errorMessage = I18n.Common.commonError
                        self.isShowPopup = true
                        self.isLoading = false
                    }
                }
                .store(in: &subscription)
        }
    }
    
    func getThemeList() {
        repository.getAudioContentActiveThemeList(isFree: isFree, isPointAvailableOnly: isPointAvailableOnly)
            .sink { result in
                switch result {
                case .finished:
                    DEBUG_LOG("finish")
                case .failure(let error):
                    ERROR_LOG(error.localizedDescription)
                }
            } receiveValue: { [unowned self] response in
                self.isLoading = false
                let responseData = response.data
                
                do {
                    let jsonDecoder = JSONDecoder()
                    let decoded = try jsonDecoder.decode(ApiResponse<[String]>.self, from: responseData)
                    self.isLoading = false
                    
                    if let data = decoded.data, decoded.success {
                        self.themeList = [I18n.Category.all] + data
                    } else {
                        if let message = decoded.message {
                            self.errorMessage = message
                        } else {
                            self.errorMessage = I18n.Common.commonError
                        }
                        
                        self.isShowPopup = true
                    }
                } catch {
                    self.errorMessage = I18n.Common.commonError
                    self.isShowPopup = true
                    self.isLoading = false
                }
            }
            .store(in: &subscription)
    }
    
    func selectTheme(theme: String) {
        if selectedTheme != theme {
            selectedTheme = theme
        }
    }
}