import { Handlers, PageProps } from "$fresh/server.ts";
import { IngredientsList } from "@islands/IngredientsList.tsx";
import { MainLayout } from "@components/layouts/main.tsx";
import Counter from "@islands/Counter.tsx";
import { Signal, useSignal } from "@preact/signals";
import { getRecipe, Recipe } from "@lib/resource/recipes.ts";
import { RedirectSearchHandler } from "@islands/Search.tsx";
import { KMenu } from "@islands/KMenu.tsx";
import PageHero from "@components/PageHero.tsx";
import { Star } from "@components/Stars.tsx";
import { renderMarkdown } from "@lib/documents.ts";

export const handler: Handlers<{ recipe: Recipe; session: unknown } | null> = {
  async GET(_, ctx) {
    try {
      const recipe = await getRecipe(ctx.params.name);
      if (!recipe) {
        return ctx.renderNotFound();
      }
      return ctx.render({ recipe, session: ctx.state.session });
    } catch (_e) {
      return ctx.renderNotFound();
    }
  },
};

function isValidRecipe(recipe: Recipe | null) {
  return recipe?.ingredients?.length && recipe?.instructions?.length &&
    recipe.name?.length;
}

function ValidRecipe({
  recipe,
  amount,
  portion,
}: { recipe: Recipe; amount: Signal<number>; portion: number }) {
  return (
    <>
      <div class="flex items-center gap-8">
        <h3 class="text-3xl my-5">Ingredients</h3>
        {portion && <Counter count={amount} />}
      </div>
      <IngredientsList
        ingredients={recipe.ingredients}
        amount={amount}
        portion={portion}
      />
      <h3 class="text-3xl my-5">Preparation</h3>
      <ol class="list-decimal grid gap-4">
        {recipe.instructions && (recipe.instructions.map((instruction) => {
          return (
            <li
              dangerouslySetInnerHTML={{
                __html: renderMarkdown(instruction),
              }}
            />
          );
        }))}
      </ol>
    </>
  );
}

export default function Greet(
  props: PageProps<{ recipe: Recipe; session: Record<string, string> }>,
) {
  const { recipe, session } = props.data;

  const portion = recipe.meta?.portion;
  const amount = useSignal(portion || 1);

  const subline = [
    recipe?.meta?.time && `Duration ${recipe.meta.time}`,
  ].filter(Boolean) as string[];

  return (
    <MainLayout
      url={props.url}
      title={`Recipes > ${recipe.name}`}
      context={recipe}
    >
      <RedirectSearchHandler />
      <KMenu type="main" context={recipe} />

      <PageHero image={recipe.meta?.image} thumbnail={recipe.meta?.thumbnail}>
        <PageHero.Header>
          <PageHero.BackLink href="/recipes" />
          {session && (
            <PageHero.EditLink
              href={`https://notes.max-richter.dev/Recipes/${recipe.id}`}
            />
          )}
        </PageHero.Header>
        <PageHero.Footer>
          <PageHero.Title link={recipe.meta?.link}>
            {recipe.name}
          </PageHero.Title>
          <PageHero.Subline
            entries={subline}
          >
            {recipe.meta?.rating && <Star rating={recipe.meta?.rating} />}
          </PageHero.Subline>
        </PageHero.Footer>
      </PageHero>

      <div class="px-8 text-white mt-10">
        {isValidRecipe(recipe)
          ? (
            <ValidRecipe
              recipe={recipe}
              amount={amount}
              portion={portion || 1}
            />
          )
          : (
            <div
              dangerouslySetInnerHTML={{
                __html: renderMarkdown(recipe?.markdown || ""),
              }}
            />
          )}
      </div>
    </MainLayout>
  );
}
