package de.effigenix.application.production;

import de.effigenix.application.production.command.RemoveProductionStepCommand;
import de.effigenix.domain.production.*;
import de.effigenix.shared.common.Result;
import de.effigenix.shared.security.ActorId;
import de.effigenix.shared.security.AuthorizationPort;
import org.springframework.transaction.annotation.Transactional;

@Transactional
public class RemoveProductionStep {

    private final RecipeRepository recipeRepository;
    private final AuthorizationPort authorizationPort;

    public RemoveProductionStep(RecipeRepository recipeRepository, AuthorizationPort authorizationPort) {
        this.recipeRepository = recipeRepository;
        this.authorizationPort = authorizationPort;
    }

    public Result<RecipeError, Recipe> execute(RemoveProductionStepCommand cmd, ActorId performedBy) {
        if (!authorizationPort.can(performedBy, ProductionAction.RECIPE_WRITE)) {
            return Result.failure(new RecipeError.Unauthorized("Not authorized to modify recipes"));
        }

        var recipeId = RecipeId.of(cmd.recipeId());

        Recipe recipe;
        switch (recipeRepository.findById(recipeId)) {
            case Result.Failure(var err) ->
                { return Result.failure(new RecipeError.RepositoryFailure(err.message())); }
            case Result.Success(var opt) -> {
                if (opt.isEmpty()) {
                    return Result.failure(new RecipeError.RecipeNotFound(recipeId));
                }
                recipe = opt.get();
            }
        }

        switch (recipe.removeProductionStep(cmd.stepNumber())) {
            case Result.Failure(var err) -> { return Result.failure(err); }
            case Result.Success(var ignored) -> { }
        }

        switch (recipeRepository.save(recipe)) {
            case Result.Failure(var err) ->
                { return Result.failure(new RecipeError.RepositoryFailure(err.message())); }
            case Result.Success(var ignored) -> { }
        }

        return Result.success(recipe);
    }
}
