package handlers

import (
	"html/template"
	"mealprep/database"
	"net/http"
	"strconv"
	"strings"
)

// IngredientsHandler handles the ingredients page
func IngredientsHandler(w http.ResponseWriter, r *http.Request) {
	ingredients, err := database.GetAllIngredients()
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	tmpl := `
		<div id="ingredients-content">
			<h2>Ingredients</h2>

			<form hx-post="/ingredients" hx-target="#ingredients-list" hx-swap="beforeend" class="add-form">
				<input type="text" name="name" placeholder="Ingredient name" required />
				<input type="text" name="unit" placeholder="Unit (e.g., grams, cups)" required />
				<button type="submit">Add Ingredient</button>
			</form>

			<div id="ingredients-list" class="items-list">
				{{range .}}
				<div class="item" id="ingredient-{{.ID}}">
					<span class="item-name">{{.Name}}</span>
					<span class="item-unit">({{.Unit}})</span>
					<button
						hx-delete="/ingredients/{{.ID}}"
						hx-target="#ingredient-{{.ID}}"
						hx-swap="outerHTML"
						hx-confirm="Are you sure you want to delete this ingredient?"
						class="delete-btn">
						Delete
					</button>
				</div>
				{{end}}
			</div>
		</div>
	`

	t := template.Must(template.New("ingredients").Parse(tmpl))
	t.Execute(w, ingredients)
}

// AddIngredientHandler handles adding a new ingredient
func AddIngredientHandler(w http.ResponseWriter, r *http.Request) {
	if err := r.ParseForm(); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	name := strings.TrimSpace(r.FormValue("name"))
	unit := strings.TrimSpace(r.FormValue("unit"))

	if name == "" || unit == "" {
		http.Error(w, "Name and unit are required", http.StatusBadRequest)
		return
	}

	id, err := database.AddIngredient(name, unit)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	tmpl := `
		<div class="item" id="ingredient-{{.ID}}">
			<span class="item-name">{{.Name}}</span>
			<span class="item-unit">({{.Unit}})</span>
			<button
				hx-delete="/ingredients/{{.ID}}"
				hx-target="#ingredient-{{.ID}}"
				hx-swap="outerHTML"
				hx-confirm="Are you sure you want to delete this ingredient?"
				class="delete-btn">
				Delete
			</button>
		</div>
	`

	data := struct {
		ID   int64
		Name string
		Unit string
	}{id, name, unit}

	t := template.Must(template.New("ingredient").Parse(tmpl))
	t.Execute(w, data)
}

// DeleteIngredientHandler handles deleting an ingredient
func DeleteIngredientHandler(w http.ResponseWriter, r *http.Request) {
	idStr := strings.TrimPrefix(r.URL.Path, "/ingredients/")
	id, err := strconv.Atoi(idStr)
	if err != nil {
		http.Error(w, "Invalid ID", http.StatusBadRequest)
		return
	}

	if err := database.DeleteIngredient(id); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.WriteHeader(http.StatusOK)
}