package com.example.casera.viewmodel

import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import com.example.casera.data.DataManager
import com.example.casera.models.TaskCompletion
import com.example.casera.models.TaskCompletionCreateRequest
import com.example.casera.network.ApiResult
import com.example.casera.network.TaskCompletionApi
import com.example.casera.util.ImageCompressor
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.launch

class TaskCompletionViewModel : ViewModel() {
    private val taskCompletionApi = TaskCompletionApi()

    private val _createCompletionState = MutableStateFlow<ApiResult<TaskCompletion>>(ApiResult.Idle)
    val createCompletionState: StateFlow<ApiResult<TaskCompletion>> = _createCompletionState

    fun createTaskCompletion(request: TaskCompletionCreateRequest) {
        viewModelScope.launch {
            _createCompletionState.value = ApiResult.Loading
            val token = DataManager.authToken.value
            if (token != null) {
                _createCompletionState.value = taskCompletionApi.createCompletion(token, request)
            } else {
                _createCompletionState.value = ApiResult.Error("Not authenticated", 401)
            }
        }
    }

    /**
     * Create task completion with images.
     *
     * @param request The completion request data
     * @param images List of ImageData (from platform-specific image pickers)
     */
    fun createTaskCompletionWithImages(
        request: TaskCompletionCreateRequest,
        images: List<com.example.casera.platform.ImageData> = emptyList()
    ) {
        viewModelScope.launch {
            _createCompletionState.value = ApiResult.Loading
            val token = DataManager.authToken.value
            if (token != null) {
                // Compress images and prepare for upload
                val compressedImages = images.map { ImageCompressor.compressImage(it) }
                val imageFileNames = images.mapIndexed { index, image ->
                    // Always use .jpg extension since we compress to JPEG
                    val baseName = image.fileName.ifBlank { "completion_$index" }
                    if (baseName.endsWith(".jpg", ignoreCase = true) ||
                        baseName.endsWith(".jpeg", ignoreCase = true)) {
                        baseName
                    } else {
                        // Remove any existing extension and add .jpg
                        baseName.substringBeforeLast('.', baseName) + ".jpg"
                    }
                }

                _createCompletionState.value = taskCompletionApi.createCompletionWithImages(
                    token = token,
                    request = request,
                    images = compressedImages,
                    imageFileNames = imageFileNames
                )
            } else {
                _createCompletionState.value = ApiResult.Error("Not authenticated", 401)
            }
        }
    }

    fun resetCreateState() {
        _createCompletionState.value = ApiResult.Idle
    }
}