import { type } from "arktype";
import type { ToolContext } from "./server.ts";
import { execute, tool } from "./shared.ts";

export const IssueInfo = type({
  issue_number: type.number.describe("The issue number to fetch"),
});

export function IssueInfoTool(ctx: ToolContext) {
  return tool({
    name: "get_issue",
    description:
      "Retrieve Gitea issue information by issue number. " +
      "Example: `get_issue({ issue_number: 1234 })`.",
    parameters: IssueInfo,
    execute: execute(async ({ issue_number }) => {
      const result = await ctx.gitea.rest.issue.issueGetIssue({
        owner: ctx.repo.owner,
        repo: ctx.repo.name,
        index: issue_number,
      });
      const data = result.data;
      ctx.toolState.issueNumber = issue_number;

      const hints: string[] = [];
      if ((data.comments ?? 0) > 0) {
        hints.push("use get_issue_comments to retrieve all comments for this issue");
      }

      return {
        number: data.number,
        url: data.html_url,
        title: data.title,
        body: data.body,
        state: data.state,
        labels: data.labels
          ?.map((l) => (typeof l === "string" ? l : l.name))
          .filter((n): n is string => n !== undefined),
        assignees: data.assignees
          ?.map((a) => a.login)
          .filter((n): n is string => n !== undefined),
        user: data.user?.login,
        created_at: data.created_at,
        updated_at: data.updated_at,
        closed_at: data.closed_at,
        comments: data.comments,
        milestone: data.milestone?.title,
        pull_request: data.pull_request ? { html_url: data.pull_request.html_url } : null,
        hints,
      };
    }),
  });
}