Francescos.Recipes.World/Francesco.Recipes.World/Views/Recipe/Details.cshtml

@model Francesco.Recipes.World.Models.BackendModels.Recipe.Recipe

@{
	ViewData["Title"] = "Recipe Details";
}

<h1>@Model.Name</h1>

<div class="recipe-details" data-recipe-id="@Model.Id">
	<div class="recipe-image">
		@if (Model.MediaFiles.Any() && Model.MediaFiles.First().Data != null)
		{
			var mediaFile = Model.MediaFiles.First();
			if (mediaFile.Data != null)
			{
				<img src="data:@mediaFile.MimeType;base64,@Convert.ToBase64String(mediaFile.Data)" alt="@Model.Name" class="img-fluid" />
			}
		}
	</div>
	<div class="recipe-info">
		<p><strong>Description:</strong> @Model.Description</p>
		<p><strong>Difficulty:</strong> @Model.Difficulty</p>
		<p><strong>Preparation Time:</strong> @Model.PreparationTime</p>
		<p><strong>Cooking Time:</strong> @Model.CookingTime</p>
	</div>

	@await Html.PartialAsync("_AdjustableIngredientsPartial", Model)

	@await Html.PartialAsync("_RecipeInstructionGridPartial", new Francesco.Recipes.World.Models.InstructionViewModel
{
	RecipeId = Model.Id,
	Instructions = Model.Instructions.ToList()
})

	<form hx-post="@($"/{Model.Id}/Delete")"
		  hx-confirm="Sind Sie sicher, dass Sie dieses Rezept löschen möchten? Diese Aktion kann nicht rückgängig gemacht werden."
		  hx-redirect="/">
		@Html.AntiForgeryToken()
		<button type="submit" class="btn btn-danger">
			<i class="bi bi-trash"></i> Rezept löschen
		</button>
	</form>
</div>

@section Scripts {
	<script>
		document.addEventListener('DOMContentLoaded', function() {
			const recipeId = '@Model.Id';
			window.recipeId = recipeId;

			const originalServings = @Model.Servings;

			const specialUnits = {
				discreteUnits: ["stk", "zehe", "blatt", "bund", "stange"],
				smallUnits: ["msp"],
				spoonUnits: {
					"TL": { name: "teelöffel", toMl: 5 },
					"EL": { name: "esslöffel", toMl: 15 }
				}
			};

			const conversionTable = {
				"knoblauch": {
					unit: "zehe",
					smallAmount: 0.5
				},
			};

			const savedServings = localStorage.getItem(`recipe_${recipeId}_servings`);
			if (savedServings) {
				document.getElementById('servingsInput').value = savedServings;
				adjustIngredientQuantities(parseInt(savedServings));
			}

			document.getElementById('decreaseServings').addEventListener('click', function () {
				const input = document.getElementById('servingsInput');
				const currentValue = parseInt(input.value);
				if (currentValue > 1) {
					input.value = currentValue - 1;
					adjustIngredientQuantities(currentValue - 1);
					saveServingsToLocalStorage(currentValue - 1);
				}
			});

			document.getElementById('increaseServings').addEventListener('click', function () {
				const input = document.getElementById('servingsInput');
				const currentValue = parseInt(input.value);
				input.value = currentValue + 1;
				adjustIngredientQuantities(currentValue + 1);
				saveServingsToLocalStorage(currentValue + 1);
			});

			document.getElementById('servingsInput').addEventListener('change', function () {
				const newServings = parseInt(this.value);
				if (newServings < 1) {
					this.value = 1;
					adjustIngredientQuantities(1);
					saveServingsToLocalStorage(1);
				} else {
					adjustIngredientQuantities(newServings);
					saveServingsToLocalStorage(newServings);
				}
			});

			function adjustIngredientQuantities(newServings) {
				const ingredients = document.querySelectorAll('#adjustable-ingredient-list li');

				ingredients.forEach(ingredient => {
					const originalQuantity = parseFloat(ingredient.getAttribute('data-original-quantity'));
					const ingredientName = ingredient.getAttribute('data-ingredient-name').toLowerCase();
					const unitSymbol = ingredient.getAttribute('data-unit');
					const unitName = ingredient.getAttribute('data-unit-name');

					let adjustedQuantity = (originalQuantity / originalServings) * newServings;
					let finalQuantity = adjustedQuantity;
					let note = "";

					if (specialUnits.discreteUnits.includes(unitSymbol)) {
						if (adjustedQuantity < 1 && adjustedQuantity > 0) {
							finalQuantity = Math.ceil(adjustedQuantity);
							note = " (ggf. eine kleine/halbe nehmen)";
						} else {
							finalQuantity = Math.round(adjustedQuantity);
						}
					}
							// Convert small unit "msp" (pinch) to teaspoons (TL) for a better estimate
							// 4 pinches = about 1 TL → show that as a note, rounded to 1 decimal
					else if (specialUnits.smallUnits.includes(unitSymbol)) {
						if (adjustedQuantity > 3) {
							finalQuantity = Math.round(adjustedQuantity / 4 * 10) / 10;
							note = ` (ca. ${finalQuantity} TL)`;
							finalQuantity = adjustedQuantity;
						} else {
							finalQuantity = Math.round(adjustedQuantity);
						}
					}
					else if (Object.keys(specialUnits.spoonUnits).includes(unitSymbol)) {
						if (adjustedQuantity > 4 && unitSymbol === "TL") {
							const esslöffel = Math.round(adjustedQuantity / 3 * 10) / 10;
							note = ` (ca. ${esslöffel} EL)`;
						}
						finalQuantity = Math.round(adjustedQuantity * 2) / 2;
					}

					if (ingredientName.includes("knoblauch") && unitSymbol === "zehe" && adjustedQuantity < 1) {
						finalQuantity = 1;
						note = " (kleine Zehe)";
					}

					const formattedQuantity = formatQuantity(finalQuantity);
					ingredient.querySelector('.ingredient-quantity').textContent = formattedQuantity;

					const noteElement = ingredient.querySelector('.ingredient-note');
					if (noteElement) {
						noteElement.textContent = note;
					}
				});
			}

			function saveServingsToLocalStorage(servings) {
				localStorage.setItem(`recipe_${recipeId}_servings`, servings.toString());
			}

			function formatQuantity(quantity) {
				if (Number.isInteger(quantity)) {
					return quantity;
				}

				if (quantity === 0.5 || quantity === 0.25 || quantity === 0.75) {
					return quantity;
				}

				return Math.round(quantity * 10) / 10;
			}


			window.addSelectedIngredientsToShoppingList = function(recipeIdParam) {
				const idToUse = recipeIdParam || recipeId;

				var form = document.getElementById('ingredient-form');
				var formData = new FormData(form);
				var selectedIngredientIds = formData.getAll('ingredientIds');

				fetch('/ShoppingList/CreateOrAddIngredients', {
					method: 'POST',
					headers: {
						'Content-Type': 'application/json',
						'RequestVerificationToken': document.querySelector('input[name="__RequestVerificationToken"]').value
					},
					body: JSON.stringify({ recipeId: idToUse, ingredientIds: selectedIngredientIds })
				})
				.then(response => {
					if (response.ok) {
						return response.json();
					}
					throw new Error('Failed to update shopping list');
				})
				.then(result => {
					localStorage.setItem('shoppingListId', result.shoppingListId);
					alert('Einkaufsliste aktualisiert.');
				})
				.catch(error => {
					alert('Fehler beim Aktualisieren der Einkaufsliste.');
				});
			};
		});
	</script>
}