#!/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
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship, Session


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))


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))


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]


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 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):
    browser.find_element(By.CSS_SELECTOR, "button#\\3Ar1\\3A-tab-0").click()

    recipes_html_elems = browser.find_elements(By.CSS_SELECTOR, "#\\3Ar1\\3A-tabpanel-0 > div > div")
    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
        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")
            wiki_url = normalize_url(
                browser=browser,
                href=html_elem.find_element(By.TAG_NAME, "a").get_attribute("href"),
            )
            kwargs = {}
            if resource_label == input_resource_label:
                kwargs['recipes_populated_at'] = datetime.datetime.utcnow()
            resource = Resource(label=resource_label, wiki_url=wiki_url, **kwargs)
            amount = html_elem.find_element(By.CSS_SELECTOR, ".text-xs:nth-child(2)").text
            time = html_elem.find_element(By.CSS_SELECTOR, ".text-xs:nth-child(3)").text
            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,
            )

        with Session(engine, autoflush=False) as session:
            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()


@click.command()
@click.option("--result", is_flag=True)
@click.option("--debug", is_flag=True)
@click.argument("search")
def main(result: bool, debug: bool, search: str):
    engine = create_engine("sqlite:///file.db", echo=debug)
    Base.metadata.create_all(bind=engine)
    if result and search:
        with Session(engine) as session:
            for obj in session.scalars(Resource.by_label(search)):
                print(obj)

        firefox_options = Options()
        if not debug:
            firefox_options.add_argument("--headless")
        browser = Firefox(options=firefox_options)
        try:
            browser.get("https://wiki.kyrium.space/")
            browser.set_window_size(1600, 1015)
            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()
            browser.implicitly_wait(5)
            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()
            populate_recipes(browser=browser, engine=engine, input_resource_label=resource_label)
        finally:
            if not debug:
                browser.quit()