import { InlineQueryResultBuilder, type InlineQueryContext } from "https://deno.land/x/grammy/mod.ts";
import type { InlineQueryResult } from "https://deno.land/x/grammy_types/inline.ts";
import type { Ctx } from "../ctx.ts";
import { SfbrPostsReqQueryBuilder } from "../../external/safebooru.ts";
import type { SafebooruPostData } from "../../external/safebooru.ts";
import { SAFEBOORU_HOST } from "../../external/safebooru.ts";

export const DEFAULT_POSTS_LIMIT = 30

export const handleSafebooruQuery = async (
  ctx: InlineQueryContext<Ctx>,
): Promise<void> => {
  const query = ctx.inlineQuery.query.slice("sfbr".length) 
  const tags = query.split(" ")
  
  const reqURL = new SfbrPostsReqQueryBuilder()
    .setPostsLimit(DEFAULT_POSTS_LIMIT)
    .setPageID(1).setTags(tags).getReqURL()

  const resp = await fetch(reqURL)
  if (!resp.ok) {
    console.log(`Error response from safebooru. URL: ${reqURL} Status: ${resp.status} ${resp.text}`)
    // TODO: Return error to user
    await ctx.api.answerInlineQuery(ctx.inlineQuery.id, [], { cache_time: 1 })
    return
  }
  const posts: SafebooruPostData[] = await resp.json()
  if (posts.length === 0) {
    console.log(`Empty response body from safebooru. URL: ${reqURL}`)
    await ctx.api.answerInlineQuery(ctx.inlineQuery.id, [], { cache_time: 1 })
    return
  }

  const results: InlineQueryResult[] = []
  for (const post of posts) {
    results.push(InlineQueryResultBuilder.photo(`id-${post.id}`, post.file_url, {
      thumbnail_url: post.preview_url,
      caption: `[source](https://${SAFEBOORU_HOST}/index.php?page=post&s=view&id=${post.id})`,
      parse_mode: "MarkdownV2",
    }))
  }
  await ctx.api.answerInlineQuery(ctx.inlineQuery.id, results, { cache_time: 1 })
}