import path from "node:path";
import matter from "@11ty/gray-matter";
import { intro, isCancel, outro, text } from "@clack/prompts";
import slugify from "@sindresorhus/slugify";
import { command, restPositionals, string } from "cmd-ts";
import filenamify from "filenamify";
import type { Config, Deps } from "../lib/deps";

export function makeNewCommand({ config, pfs }: Deps) {
  return command({
    name: "new",
    description: "Create a new post",
    args: {
      new: restPositionals({
        type: string,
        displayName: "file",
        description: "name of the new post",
      }),
    },
    handler: async ({ new: titleArray }) => {
      intro("Create a new post");
      let title: string;
      if (titleArray.length === 0) {
        title = await generateTitle();
        if (title === "") {
          return;
        }
      } else {
        title = titleArray.join(" ");
      }
      const slug = slugify(title);
      const fileName = filenamify(slug);
      const frontmatter = await generateFrontmatter(title, config);
      const filePath = path.join(config.blogDir, `${fileName}.md`);
      outro(`${title} created successfully`);
      await pfs.write(filePath, frontmatter);
    },
  });
}

async function generateFrontmatter(title: string, config: Config): Promise<string> {
  const description = await makeDescription(title);
  // const now = new Date();

  const data = {
    [config.titleKey]: title,
    [config.publishedAtKey]: new Date("3000-01-01T00:00:00Z"),
    [config.authorKey]: config.author,
    [config.draftKey]: true,
    [config.descriptionKey]: description,
    [config.tagsKey]: [],
  };

  return matter.stringify("", data);
}

async function makeDescription(title: string): Promise<string> {
  const description = await text({
    message: "Enter a description for the post:",
    defaultValue: title,
  });

  if (isCancel(description)) {
    return "";
  }

  return description;
}

async function generateTitle(): Promise<string> {
  const title = await text({
    message: "Enter a title for the post:",
    validate: (value) => {
      if (!value) {
        return "Title required";
      }
      return undefined;
    },
  });

  if (isCancel(title)) {
    return "";
  }

  return title;
}