from __future__ import annotations
# Factorio technologies are imported from a .json document in /data
from typing import Dict, Set, FrozenSet
import os
import json

import Options
import Utils
import logging
import functools

factorio_id = 2 ** 17
source_folder = Utils.local_path("data", "factorio")

with open(os.path.join(source_folder, "techs.json")) as f:
    raw = json.load(f)
with open(os.path.join(source_folder, "recipes.json")) as f:
    raw_recipes = json.load(f)
with open(os.path.join(source_folder, "machines.json")) as f:
    raw_machines = json.load(f)
tech_table: Dict[str, int] = {}
technology_table: Dict[str, Technology] = {}

always = lambda state: True


class FactorioElement():
    name: str

    def __repr__(self):
        return f"{self.__class__.__name__}({self.name})"

    def __hash__(self):
        return hash(self.name)


class Technology(FactorioElement):  # maybe make subclass of Location?
    def __init__(self, name, ingredients, factorio_id):
        self.name = name
        self.factorio_id = factorio_id
        self.ingredients = ingredients

    def build_rule(self, player: int):
        logging.debug(f"Building rules for {self.name}")

        return lambda state, technologies=technologies: all(state.has(f"Automated {ingredient}", player)
                                                            for ingredient in self.ingredients)

    def get_prior_technologies(self) -> Set[Technology]:
        """Get Technologies that have to precede this one to resolve tree connections."""
        technologies = set()
        for ingredient in self.ingredients:
            technologies |= required_technologies[ingredient]  # technologies that unlock the recipes
        return technologies

    def __hash__(self):
        return self.factorio_id

    def get_custom(self, world, allowed_packs: Set[str], player: int) -> CustomTechnology:
        return CustomTechnology(self, world, allowed_packs, player)


class CustomTechnology(Technology):
    """A particularly configured Technology for a world."""

    def __init__(self, origin: Technology, world, allowed_packs: Set[str], player: int):
        ingredients = origin.ingredients & allowed_packs
        self.player = player
        if origin.name not in world.worlds[player].static_nodes:
            ingredients = list(ingredients)
            ingredients.sort()  # deterministic sample
            ingredients = world.random.sample(ingredients, world.random.randint(1, len(ingredients)))
        super(CustomTechnology, self).__init__(origin.name, ingredients, origin.factorio_id)


class Recipe(FactorioElement):
    def __init__(self, name, category, ingredients, products):
        self.name = name
        self.category = category
        self.ingredients = ingredients
        self.products = products

    def __repr__(self):
        return f"{self.__class__.__name__}({self.name})"

    @property
    def crafting_machines(self) -> Set[Machine]:
        """crafting machines able to run this recipe"""
        return machines_per_category[self.category]

    @property
    def unlocking_technologies(self) -> Set[Technology]:
        """Unlocked by any of the returned technologies. Empty set indicates a starting recipe."""
        return {technology_table[tech_name] for tech_name in recipe_sources.get(self.name, ())}


class Machine(FactorioElement):
    def __init__(self, name, categories):
        self.name: str = name
        self.categories: set = categories

# recipes and technologies can share names in Factorio
for technology_name in sorted(raw):
    data = raw[technology_name]
    factorio_id += 1
    current_ingredients = set(data["ingredients"])
    technology = Technology(technology_name, current_ingredients, factorio_id)
    factorio_id += 1
    tech_table[technology_name] = technology.factorio_id
    technology_table[technology_name] = technology

recipe_sources: Dict[str, str] = {}  # recipe_name -> technology source

for technology, data in raw.items():
    for recipe_name in data["unlocks"]:
        recipe_sources.setdefault(recipe_name, set()).add(technology)

del (raw)
lookup_id_to_name: Dict[int, str] = {item_id: item_name for item_name, item_id in tech_table.items()}
recipes = {}
all_product_sources: Dict[str, Set[Recipe]] = {"character": set()}
for recipe_name, recipe_data in raw_recipes.items():
    # example:
    # "accumulator":{"ingredients":["iron-plate","battery"],"products":["accumulator"],"category":"crafting"}

    recipe = Recipe(recipe_name, recipe_data["category"], set(recipe_data["ingredients"]), set(recipe_data["products"]))
    recipes[recipe_name] = Recipe
    if recipe.products.isdisjoint(recipe.ingredients) and "empty-barrel" not in recipe.products:  # prevents loop recipes like uranium centrifuging
        for product_name in recipe.products:
            all_product_sources.setdefault(product_name, set()).add(recipe)

del (raw_recipes)

machines: Dict[str, Machine] = {}

for name, categories in raw_machines.items():
    machine = Machine(name, set(categories))
    machines[name] = machine

del (raw_machines)

# build requirements graph for all technology ingredients

all_ingredient_names: Set[str] = set()
for technology in technology_table.values():
    all_ingredient_names |= technology.ingredients


def unlock_just_tech(recipe: Recipe, _done) -> Set[Technology]:
    current_technologies = set()
    current_technologies |= recipe.unlocking_technologies
    for ingredient_name in recipe.ingredients:
        current_technologies |= recursively_get_unlocking_technologies(ingredient_name, _done)
    return current_technologies

def unlock(recipe: Recipe, _done) -> Set[Technology]:
    current_technologies = set()
    current_technologies |= recipe.unlocking_technologies
    for ingredient_name in recipe.ingredients:
        current_technologies |= recursively_get_unlocking_technologies(ingredient_name, _done)
    current_technologies |= required_category_technologies[recipe.category]

    return current_technologies

def recursively_get_unlocking_technologies(ingredient_name, _done=None, unlock_func=unlock_just_tech) -> Set[Technology]:
    if _done:
        if ingredient_name in _done:
            return set()
        else:
            _done.add(ingredient_name)
    else:
        _done = {ingredient_name}
    recipes = all_product_sources.get(ingredient_name)
    if not recipes:
        return set()
    current_technologies = set()
    for recipe in recipes:
        current_technologies |= unlock_func(recipe, _done)

    return current_technologies



required_machine_technologies: Dict[str, FrozenSet[Technology]] = {}
for ingredient_name in machines:
    required_machine_technologies[ingredient_name] = frozenset(recursively_get_unlocking_technologies(ingredient_name))

logical_machines = {}
for machine in machines.values():
    logically_useful = True
    for pot_source_machine in machines.values():
        if machine != pot_source_machine \
                and machine.categories.issuperset(pot_source_machine.categories) \
                and required_machine_technologies[machine.name].issuperset(
                required_machine_technologies[pot_source_machine.name]):
            logically_useful = False
            break

    if logically_useful:
        logical_machines[machine.name] = machine

del(required_machine_technologies)

machines_per_category: Dict[str: Set[Machine]] = {}
for machine in logical_machines.values():
    for category in machine.categories:
        machines_per_category.setdefault(category, set()).add(machine)

# required technologies to be able to craft recipes from a certain category
required_category_technologies: Dict[str, FrozenSet[FrozenSet[Technology]]] = {}
for category_name, cat_machines in machines_per_category.items():
    techs = set()
    for machine in cat_machines:
        techs |= recursively_get_unlocking_technologies(machine.name)
    required_category_technologies[category_name] = frozenset(techs)

required_technologies: Dict[str, FrozenSet[Technology]] = {}
for ingredient_name in all_ingredient_names:
    required_technologies[ingredient_name] = frozenset(
        recursively_get_unlocking_technologies(ingredient_name, unlock_func=unlock))


advancement_technologies: Set[str] = set()
for technologies in required_technologies.values():
    advancement_technologies |= {technology.name for technology in technologies}

@functools.lru_cache(10)
def get_rocket_requirements(ingredients: Set[str]) -> Set[str]:
    techs = recursively_get_unlocking_technologies("rocket-silo")
    for ingredient in ingredients:
        techs |= recursively_get_unlocking_technologies(ingredient)
    return {tech.name for tech in techs}


rocket_recipes = {
    Options.MaxSciencePack.option_space_science_pack:
        {"rocket-control-unit": 10, "low-density-structure": 10, "rocket-fuel": 10},
    Options.MaxSciencePack.option_utility_science_pack:
        {"speed-module": 10, "steel-plate": 10, "solid-fuel": 10},
    Options.MaxSciencePack.option_production_science_pack:
        {"speed-module": 10, "steel-plate": 10, "solid-fuel": 10},
    Options.MaxSciencePack.option_chemical_science_pack:
        {"advanced-circuit": 10, "steel-plate": 10, "solid-fuel": 10},
    Options.MaxSciencePack.option_military_science_pack:
        {"defender-capsule": 10, "stone-wall": 10, "coal": 10},
    Options.MaxSciencePack.option_logistic_science_pack:
        {"electronic-circuit": 10, "stone-brick": 10, "coal": 10},
    Options.MaxSciencePack.option_automation_science_pack:
        {"copper-cable": 10, "iron-plate": 10, "wood": 10}
}