import { Component, Input } from '@angular/core';
import { FormBuilder, FormsModule, ReactiveFormsModule, Validators } from '@angular/forms';
import { Router } from '@angular/router';
import { Ingredient, IngredientEntry, Recipe } from '../../cookbook/type';
import { RecipeService } from '../recipe.service';
import { MatInputModule } from '@angular/material/input';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatButton } from '@angular/material/button';

@Component({
  selector: 'app-recipe-add',
  standalone: true,
  imports: [ReactiveFormsModule, FormsModule, MatFormFieldModule, MatInputModule, MatButton, MatFormFieldModule],
  templateUrl: './recipe-add.component.html',
})
export class RecipeAddComponent {
  createForm = this.formBuilder.group({
    name: ['', Validators.maxLength(256)],
    description: ['', Validators.maxLength(512)],
    image: '',
    selectedIngredient: '',
  });

  ingredientEntries: IngredientEntry[] = [];
  ingredients: Ingredient[] = [{
    id: 1,
    name: 'Paprika',
  }];

  selectedFilename: string = '';

  #recipeId: number = -1;
  @Input()
  set id(recipeId: string) {
    if (recipeId === undefined) return;
    this.#recipeId = parseInt(recipeId);
    const recipe = this.recipes.get(this.#recipeId);
    if (recipe === null) {
      this.router.navigateByUrl('404');
      return;
    }
    this.createForm.patchValue({
      name: recipe.name,
      description: recipe.description,
    });
  }
  get recipeId() {
    return this.#recipeId;
  }

  constructor(private formBuilder: FormBuilder, private recipes: RecipeService, private router: Router) {}

  onSubmit(): void {
    if (this.createForm.invalid) {
      return;
    }
    const value = this.createForm.value;
    const partial: Omit<Recipe, 'id'> = {
      name: value.name!,
      description: value.description!,
      image: value.image ?? '',
      ingredients: this.ingredientEntries,
    };
    if (this.#recipeId === -1) {
      this.recipes.add(partial);
    } else {
      this.recipes.edit({ id: this.#recipeId, ...partial });
    }
    this.router.navigateByUrl('recipes');
  }

  onAddIngredient(): void {
    const value = this.createForm.value;
    if (!value.selectedIngredient) {
      return;
    }
    const id = parseInt(value.selectedIngredient!);
    if (this.ingredientEntries.find((ingredient) => ingredient.idIngredient === id)) {
      return;
    }
    this.ingredientEntries.push({
      idIngredient: id,
      idRecipe: -1,
      quantity: 1,
    });
  }

  onFileSelected(event: Event): void {
    const file = (event.target as HTMLInputElement).files![0];
    if (file) {
      this.selectedFilename = file.name;
      const reader = new FileReader();
      reader.onload = (event) => {
        this.createForm.patchValue({
          image: event.target!.result?.toString()
        });
      }
      reader.readAsDataURL(file);
    }
  }
}