import { mkdirSync, writeFileSync } from "node:fs";
import { join } from "node:path";
import type { Role, RoleResult, StartStep, WorkflowMessage } from "@uncaged/nerve-core";
import type { LlmProvider } from "@uncaged/nerve-workflow-utils";
import { createHermesRole, isDryRun } from "@uncaged/nerve-workflow-utils";
import { z } from "zod";
import { buildPublishPrompt } from "./prompt.js";

export const publishMetaSchema = z.object({
  success: z.boolean().describe("true if git push and tea pr create both succeeded"),
});
export type PublishMeta = z.infer<typeof publishMetaSchema>;

export type BuildPublishDeps = {
  provider: LlmProvider;
  nerveRoot: string;
};

function logPath(nerveRoot: string): string {
  return join(nerveRoot, "logs", `solve-issue-publish-${Date.now()}.log`);
}

export function buildPublishRole({ provider, nerveRoot }: BuildPublishDeps): Role<PublishMeta> {
  const hermes = createHermesRole<PublishMeta>({
    prompt: async (threadId) => buildPublishPrompt({ threadId, nerveRoot }),
    extract: { provider, schema: publishMetaSchema },
  });

  return async (start: StartStep, messages: WorkflowMessage[]): Promise<RoleResult<PublishMeta>> => {
    const file = logPath(nerveRoot);
    mkdirSync(join(file, ".."), { recursive: true });

    if (isDryRun(start)) {
      const msg = "[dry-run] publish skipped (no git push / PR)";
      writeFileSync(file, `${msg}\n`, "utf-8");
      return {
        content: `[dry-run] publish skipped — log: ${file}`,
        meta: { success: true },
      };
    }

    try {
      return await hermes(start, messages);
    } catch (e) {
      const msg = e instanceof Error ? e.message : String(e);
      const body = `publish failed: ${msg}\n`;
      writeFileSync(file, body, "utf-8");
      return {
        content: `publish failed: ${msg}\nLog: ${file}`,
        meta: { success: false },
      };
    }
  };
}