from typing import List
from .recipe import V60, ESPRESSO, Recipe, Step, StepType

class RecipeManager:
    def __init__(self):
        self.recipes = [
            V60,
            ESPRESSO
        ]
        self.tmp_recipe = None
        self.active_recipe: Recipe = None
        self.current_recipe_step_id = 0
    
    def add_recipe(self, recipe):
        self.recipes.append(recipe)
    
    def update_recipe(self, recipe_id, new_recipe):
        self.recipes[recipe_id] = new_recipe

    def remove_recipe(self, recipe):
        self.recipes.remove(recipe)
    
    def get_recipe_id(self, recipe):
        return self.recipes.index(recipe)
    
    def get_recipe(self, recipe_id) -> Recipe:
        if recipe_id is None:
            return self.tmp_recipe
        return self.recipes[recipe_id]



    def activate_recipe(self, recipe_id):
        self.active_recipe = self.get_recipe(recipe_id)
    
    def deactivate_recipe(self):
        self.active_recipe = None
        self.current_recipe_step_id = 0
    
    def get_current_step(self) -> List[Step]:
        steps = [None] * 3
        if self.active_recipe is None:
            return steps
        if self.current_recipe_step_id > len(self.active_recipe.steps):
            return steps
        
        if self.current_recipe_step_id > 0:
            steps[0] = self.active_recipe.steps[self.current_recipe_step_id - 1]
        if self.current_recipe_step_id < len(self.active_recipe.steps):
            steps[1] = self.active_recipe.steps[self.current_recipe_step_id]
        elif self.current_recipe_step_id == len(self.active_recipe.steps):
            steps[1] = Step(StepType.SECTION, "Enjoy")
        if self.current_recipe_step_id < len(self.active_recipe.steps) - 1:
            steps[2] = self.active_recipe.steps[self.current_recipe_step_id + 1]
        return steps
    
    def next_step(self) -> List[Step]:
        if self.active_recipe is None:
            return [None] * 3
        self.current_recipe_step_id = min(self.current_recipe_step_id + 1, len(self.active_recipe.steps) + 1)
        
        return self.get_current_step()
    
    def previous_step(self) -> List[Step]:
        if self.active_recipe is None:
            return [None] * 3
        self.current_recipe_step_id = max(0, self.current_recipe_step_id - 1)
        
        return self.get_current_step()