package profiles.presentation.viewmodel

import android.net.Uri
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import dagger.hilt.android.lifecycle.HiltViewModel
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow
import kotlinx.coroutines.launch
import profiles.data.remote.dto.ProfileDto
import profiles.domain.repository.ProfileRepository
import javax.inject.Inject

data class ProfileState(
    val profile: ProfileDto? = null,
    val isLoading: Boolean = false,
    val error: String? = null,
    val isSaving: Boolean = false
)

@HiltViewModel
class ProfileViewModel @Inject constructor(
    private val repository: ProfileRepository
) : ViewModel() {

    private val _state = MutableStateFlow(ProfileState())
    val state: StateFlow<ProfileState> = _state.asStateFlow()

    fun loadProfile(id: String? = null) {
        viewModelScope.launch {
            _state.value = _state.value.copy(isLoading = true)
            val result = if (id == null) {
                repository.getMyProfile()
            } else {
                repository.getProfile(id)
            }
            
            result.onSuccess { profile ->
                _state.value = _state.value.copy(profile = profile, isLoading = false)
            }.onFailure { error ->
                _state.value = _state.value.copy(error = error.message, isLoading = false)
            }
        }
    }

    fun updateProfile(displayName: String?, bio: String?, birthday: String? = null, avatarUri: Uri? = null) {
        viewModelScope.launch {
            _state.value = _state.value.copy(isSaving = true, error = null)
            
            try {
                // 1. Обновляем аватар, если он выбран
                avatarUri?.let { uri ->
                    repository.uploadAvatar(uri).onFailure { error ->
                        throw Exception(error.message ?: "Failed to upload avatar")
                    }
                }

                // 2. Обновляем текстовые данные
                // Пустую строку преобразуем в null для даты рождения
                val birthdayToSend = if (birthday.isNullOrBlank()) null else birthday
                
                // Логирование для отладки
                android.util.Log.d("ProfileViewModel", "updateProfile: displayName=$displayName, bio=$bio, birthday=$birthday, birthdayToSend=$birthdayToSend")
                
                repository.updateProfile(displayName, bio, birthdayToSend)
                    .onSuccess { updatedProfile ->
                        android.util.Log.d("ProfileViewModel", "updateProfile success: birthday=${updatedProfile.birthday}")
                        _state.value = _state.value.copy(profile = updatedProfile, isSaving = false)
                    }
                    .onFailure { error ->
                        android.util.Log.e("ProfileViewModel", "updateProfile error: ${error.message}")
                        _state.value = _state.value.copy(error = error.message, isSaving = false)
                    }
            } catch (e: Exception) {
                android.util.Log.e("ProfileViewModel", "updateProfile exception: ${e.message}")
                _state.value = _state.value.copy(error = e.message, isSaving = false)
            }
        }
    }

    fun removeAvatar() {
        viewModelScope.launch {
            repository.removeAvatar().onSuccess { updatedProfile ->
                _state.value = _state.value.copy(profile = updatedProfile)
            }
        }
    }
}