#!/usr/bin/env python3

import datetime
from typing import Optional
from urllib.parse import urljoin

import click
import sqlalchemy
from selenium.webdriver import Firefox
from selenium.webdriver.common.by import By
from selenium.webdriver.firefox.options import Options
from selenium.webdriver.remote.webdriver import WebDriver
from sqlalchemy import String, create_engine, select, ForeignKey, Select, Table, Column, delete
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship, Session

recipe_info_timeout = datetime.timedelta(days=30)


class Base(DeclarativeBase):
    pass


class Resource(Base):
    __tablename__ = "resources"

    id: Mapped[int] = mapped_column(primary_key=True)
    label: Mapped[str] = mapped_column(String(127))
    wiki_url: Mapped[str]
    recipes_populated_at: Mapped[Optional[datetime.datetime]]
    flows: Mapped[list["ResourceFlow"]] = relationship(back_populates="resource")

    @classmethod
    def by_label(cls, search: str) -> Select[tuple["Resource"]]:
        return select(cls).where(cls.label.ilike(search))

    def __repr__(self):
        return (
            f"Resource(id={self.id}, "
            f"label={self.label}, "
            f"wiki_url={self.wiki_url}, "
            f"recipes_populated_at={self.recipes_populated_at})"
        )


class Factory(Base):
    __tablename__ = "factories"

    id: Mapped[int] = mapped_column(primary_key=True)
    label: Mapped[str] = mapped_column(String(127))
    wiki_url: Mapped[str]

    @classmethod
    def by_label(cls, search: str) -> Select[tuple["Factory"]]:
        return select(cls).where(cls.label.ilike(search))

    def __repr__(self):
        return f"Factory(id={self.id}, label={self.label}, wiki_url={self.wiki_url})"


ingredients_table = Table(
    "recipe_ingredients",
    Base.metadata,
    Column("recipe_id", ForeignKey("recipes.id"), primary_key=True),
    Column("resource_flow_id", ForeignKey("resource_flows.id"), primary_key=True),
)


results_table = Table(
    "recipe_results",
    Base.metadata,
    Column("recipe_id", ForeignKey("recipes.id"), primary_key=True),
    Column("resource_flow_id", ForeignKey("resource_flows.id"), primary_key=True),
)


class ResourceFlow(Base):
    __tablename__ = "resource_flows"

    id: Mapped[int] = mapped_column(primary_key=True)
    ingredient_in: Mapped[Optional["Recipe"]] = relationship(secondary=ingredients_table, back_populates="ingredients")
    result_of: Mapped[Optional["Recipe"]] = relationship(secondary=results_table, back_populates="results")
    resource_id: Mapped[int] = mapped_column(ForeignKey("resources.id"))
    resource: Mapped["Resource"] = relationship(back_populates="flows")
    amount: Mapped[str]
    time: Mapped[str]

    def __repr__(self):
        return f"ResourceFlow(id={self.id}, resource_id={self.resource_id}, amount={self.amount}, time={self.time})"


class Recipe(Base):
    __tablename__ = "recipes"

    id: Mapped[int] = mapped_column(primary_key=True)
    factory_id: Mapped[int] = mapped_column(ForeignKey("factories.id"))
    factory: Mapped["Factory"] = relationship()
    ingredients: Mapped[list["ResourceFlow"]] = relationship(
        secondary=ingredients_table, back_populates="ingredient_in"
    )
    results: Mapped[list["ResourceFlow"]] = relationship(secondary=results_table, back_populates="result_of")

    def __repr__(self):
        return f"Recipe(id={self.id}, factory={self.factory}, ingredients={self.ingredients}, results={self.results})"


def normalize_url(browser: WebDriver, href: str) -> str:
    return urljoin(base=browser.current_url, url=href)


def populate_recipes(browser: WebDriver, engine: sqlalchemy.Engine, input_resource_label: str) -> int:
    browser.find_element(By.CSS_SELECTOR, "button[id$='tab-0']").click()
    recipes_html_elems = browser.find_elements(By.CSS_SELECTOR, "div[id$='tabpanel-0'] > div > div")
    with Session(engine, autoflush=False) as session:
        for recipe_idx in range(len(recipes_html_elems)):
            recipe_html_elem = recipes_html_elems[recipe_idx]
            factory_html_elem = recipe_html_elem.find_element(By.CSS_SELECTOR, ".flex-col > span > a")
            factory_label = factory_html_elem.text.strip()
            factory_url = urljoin(base=browser.current_url, url=factory_html_elem.get_attribute("href"))
            print("recipe", recipe_idx, "produced in:", factory_label, factory_url)

            def extract_resource_flow(html_elem):
                resource_img = html_elem.find_element(By.TAG_NAME, "img")
                resource_label = resource_img.get_attribute("alt").strip()
                wiki_url = normalize_url(
                    browser=browser,
                    href=html_elem.find_element(By.TAG_NAME, "a").get_attribute("href"),
                )
                resource = Resource(label=resource_label, wiki_url=wiki_url)
                amount = html_elem.find_element(By.CSS_SELECTOR, ".text-xs:nth-child(2)").text.strip()
                time = html_elem.find_element(By.CSS_SELECTOR, ".text-xs:nth-child(3)").text.strip()
                return ResourceFlow(resource=resource, amount=amount, time=time)

            ingredient_html_elems = recipe_html_elem.find_elements(
                By.CSS_SELECTOR, f".flex-row > div:nth-child(1) > div:has(> a)"
            )
            ingredients: list[ResourceFlow] = []
            for ingredient_idx in range(len(ingredient_html_elems)):
                resource_flow = extract_resource_flow(ingredient_html_elems[ingredient_idx])
                ingredients.append(resource_flow)
                print(
                    "recipe",
                    recipe_idx,
                    "ingredient",
                    ingredient_idx,
                    "name:",
                    resource_flow.resource.label,
                )
                print(
                    "recipe",
                    recipe_idx,
                    "ingredient",
                    ingredient_idx,
                    "count:",
                    resource_flow.amount,
                )
                print(
                    "recipe",
                    recipe_idx,
                    "ingredient",
                    ingredient_idx,
                    "time:",
                    resource_flow.time,
                )
            result_html_elems = recipe_html_elem.find_elements(
                By.CSS_SELECTOR, f".flex-row > div:nth-child(3) > div:has(> a)"
            )
            results: list[ResourceFlow] = []
            for result_idx in range(len(result_html_elems)):
                resource_flow = extract_resource_flow(result_html_elems[result_idx])
                results.append(resource_flow)
                print(
                    "recipe",
                    recipe_idx,
                    "result",
                    result_idx,
                    "name:",
                    resource_flow.resource.label,
                )
                print(
                    "recipe",
                    recipe_idx,
                    "result",
                    result_idx,
                    "count:",
                    resource_flow.amount,
                )
                print(
                    "recipe",
                    recipe_idx,
                    "result",
                    result_idx,
                    "time:",
                    resource_flow.time,
                )

            factory = session.scalars(Factory.by_label(factory_label)).one_or_none()
            if not factory:
                factory = Factory(label=factory_label, wiki_url=factory_url)
                session.add(factory)
            for flow in ingredients + results:
                res = session.scalars(Resource.by_label(flow.resource.label)).one_or_none()
                if res:
                    flow.resource = res
                else:
                    session.add(flow.resource)
                session.add(flow)
            recipe = Recipe(factory=factory, ingredients=ingredients, results=results)
            session.add(recipe)
            session.commit()

        updated_resource = session.scalars(Resource.by_label(input_resource_label)).one()
        updated_resource.recipes_populated_at = datetime.datetime.utcnow()
        res_id = updated_resource.id
        session.commit()
        return res_id


@click.command()
@click.option("--result", is_flag=True)
@click.option("--debug", is_flag=True)
@click.option("--refetch", is_flag=True)
@click.argument("search")
def main(result: bool, debug: bool, refetch: bool, search: str):
    engine = create_engine("sqlite:///file.db", echo=debug)
    Base.metadata.create_all(bind=engine)
    if result and search:
        wiki_search = True
        resource_label = search
        with Session(engine) as session:
            resources = session.scalars(Resource.by_label(resource_label)).all()
            if len(resources) == 0:
                print("Could not find existing resources matching the search string.. starting wiki search")
            else:
                for idx in range(1, len(resources) + 1):
                    print(f"{idx}: {resources[idx - 1].label}")
                user_choice = click.prompt(
                    "Chose a resource to continue or 0 to continue with a wiki search", default=1
                )
                if user_choice != 0:
                    res_id = resources[user_choice - 1].id
                    resource_label = resources[user_choice - 1].label
                    wiki_search = False
            session.commit()

        firefox_options = Options()
        firefox_options.add_argument("--width=1600")
        firefox_options.add_argument("--height=1015")
        if not debug:
            firefox_options.add_argument("--headless")
        browser = Firefox(options=firefox_options)
        browser.implicitly_wait(5)
        try:
            if wiki_search:
                browser.get("https://wiki.kyrium.space/")
                search_bar = browser.find_element(By.CSS_SELECTOR, "nav input[placeholder='Search for an item...']")
                search_bar.click()
                search_bar.send_keys(search)
                search_button = browser.find_element(By.CSS_SELECTOR, "nav button[type='submit']")
                search_button.click()
                choices = browser.find_elements(By.CSS_SELECTOR, "body > div > .container:nth-child(1) a.items-center")
                if not choices:
                    print("No wiki entries found for this result")
                    return
                elif len(choices) > 1:
                    default_choice = 1
                    choice_names: list[str] = []
                    for choice_idx in range(1, len(choices) + 1):
                        recipe_choice = choices[choice_idx - 1]
                        name = recipe_choice.find_element(By.TAG_NAME, "img").get_attribute("alt")
                        choice_names.append(name)
                        if name.casefold() == search.casefold():
                            default_choice = choice_idx
                        print(f"{choice_idx}: {name}")
                    user_choice = click.prompt("Chose a recipe to continue…", default=default_choice)
                    if not user_choice:
                        user_choice = default_choice
                    else:
                        user_choice = int(user_choice)

                    link_html_elem = choices[user_choice - 1]
                else:
                    link_html_elem = choices[0]

                resource_label = link_html_elem.find_element(By.TAG_NAME, "img").get_attribute("alt")
                # FIXME: check if resource_label is in database
                if debug:
                    print("resource_label:", resource_label)
                link_html_elem.click()
                res_id = populate_recipes(browser=browser, engine=engine, input_resource_label=resource_label)
            else:
                with Session(engine) as session:
                    input_resource = session.get(Resource, res_id)
                    input_resource_url = input_resource.wiki_url
                    resource_label = input_resource.label
                    refetch = (
                        refetch
                        or input_resource.recipes_populated_at is None
                        or datetime.datetime.utcnow() - input_resource.recipes_populated_at > recipe_info_timeout
                    )
                    if refetch:
                        print("Deleting recipes for", input_resource)
                        for flow in session.scalars(select(ResourceFlow).where(ResourceFlow.resource_id == res_id)):
                            if flow.result_of:
                                for flow2 in flow.result_of.ingredients:
                                    session.delete(flow2)
                                for flow2 in flow.result_of.results:
                                    session.delete(flow2)
                                session.delete(flow.result_of)
                    session.commit()
                if refetch:
                    print("Refetching recipes for", resource_label)
                    browser.get(input_resource_url)
                    res_id = populate_recipes(browser=browser, engine=engine, input_resource_label=resource_label)

            with Session(engine) as session:
                stmt = select(Recipe).join(Recipe.results).filter(ResourceFlow.resource_id == res_id)
                for recipe in session.scalars(stmt):
                    print(recipe)
                    for flow in recipe.ingredients:
                        print("ingredient:", flow.resource, flow)
                    for flow in recipe.results:
                        print("result:    ", flow.resource, flow)
        finally:
            if not debug:
                browser.quit()