import Foundation
import Capacitor
import FirebaseCore
import FirebaseAuth

/**
 * Please read the Capacitor iOS Plugin Development Guide
 * here: https://capacitorjs.com/docs/plugins/ios
 */
@objc(FirebaseAuthenticationPlugin)
public class FirebaseAuthenticationPlugin: CAPPlugin {
    public let errorPhoneNumberVerificationIdCodeMissing = "phoneNumber or verificationId and verificationCode must be provided."
    public let authStateChangeEvent = "authStateChange"
    private var implementation: FirebaseAuthentication?

    override public func load() {
        self.implementation = FirebaseAuthentication(plugin: self, config: firebaseAuthenticationConfig())
        self.implementation?.authStateObserver = { [weak self] in
            self?.handleAuthStateChange()
        }
    }

    @objc func getCurrentUser(_ call: CAPPluginCall) {
        let user = implementation?.getCurrentUser()
        let userResult = FirebaseAuthenticationHelper.createUserResult(user)
        var result = JSObject()
        result["user"] = userResult
        call.resolve(result)
    }

    @objc func getIdToken(_ call: CAPPluginCall) {
        let forceRefresh = call.getBool("forceRefresh", false)

        implementation?.getIdToken(forceRefresh, completion: { token, error in
            if let error = error {
                call.reject(error.localizedDescription)
                return
            }
            var result = JSObject()
            result["token"] = token
            call.resolve(result)
        })
    }

    @objc func setLanguageCode(_ call: CAPPluginCall) {
        let languageCode = call.getString("languageCode", "")

        implementation?.setLanguageCode(languageCode)
        call.resolve()
    }

    @objc func signInWithApple(_ call: CAPPluginCall) {
        implementation?.signInWithApple(call)
    }

    @objc func signInWithFacebook(_ call: CAPPluginCall) {
        implementation?.signInWithFacebook(call)
    }

    @objc func signInWithGithub(_ call: CAPPluginCall) {
        implementation?.signInWithGithub(call)
    }

    @objc func signInWithGoogle(_ call: CAPPluginCall) {
        implementation?.signInWithGoogle(call)
    }

    @objc func signInWithMicrosoft(_ call: CAPPluginCall) {
        implementation?.signInWithMicrosoft(call)
    }

    @objc func signInWithPhoneNumber(_ call: CAPPluginCall) {
        let phoneNumber = call.getString("phoneNumber")
        let verificationId = call.getString("verificationId")
        let verificationCode = call.getString("verificationCode")

        if phoneNumber == nil && (verificationId == nil || verificationCode == nil) {
            call.reject(errorPhoneNumberVerificationIdCodeMissing)
            return
        }

        implementation?.signInWithPhoneNumber(call)
    }

    @objc func signInWithPlayGames(_ call: CAPPluginCall) {
        call.reject("Not available on iOS.")
    }

    @objc func signInWithTwitter(_ call: CAPPluginCall) {
        implementation?.signInWithTwitter(call)
    }

    @objc func signInWithYahoo(_ call: CAPPluginCall) {
        implementation?.signInWithYahoo(call)
    }

    @objc func signInWithCustomToken(_ call: CAPPluginCall) {
        implementation?.signInWithCustomToken(call)
    }

    @objc func signOut(_ call: CAPPluginCall) {
        implementation?.signOut(call)
    }

    @objc func useAppLanguage(_ call: CAPPluginCall) {
        implementation?.useAppLanguage()
        call.resolve()
    }

    @objc func handleAuthStateChange() {
        let user = implementation?.getCurrentUser()
        let userResult = FirebaseAuthenticationHelper.createUserResult(user)
        var result = JSObject()
        result["user"] = userResult
        notifyListeners(authStateChangeEvent, data: result)
    }

    private func firebaseAuthenticationConfig() -> FirebaseAuthenticationConfig {
        var config = FirebaseAuthenticationConfig()

        if let skipNativeAuth = getConfigValue("skipNativeAuth") as? Bool {
            config.skipNativeAuth = skipNativeAuth
        }
        if let providers = getConfigValue("providers") as? [String] {
            config.providers = providers
        }

        return config
    }
}