// Vendored from packages/exporter/src/exporter.ts.
// Sole change: import Skill/Step from local ./skill.ts.

import { stringify as yamlStringify } from "yaml";
import type { Skill, Step } from "./skill.ts";

export interface SkillBundle {
  skill_md: string;
  manifest_json: string;
  actions_toon: string;
}

export const TOON_HEADER_ACTIONS = "@meeseeks/v0.1 actions";

export function exportSkill(skill: Skill): SkillBundle {
  return {
    skill_md: renderSkillMd(skill),
    manifest_json: renderManifestJson(skill),
    actions_toon: renderActionsToon(skill),
  };
}

function renderSkillMd(s: Skill): string {
  const params = s.inputs.map((i) => `  - name: ${i}\n    required: true`).join("\n");
  const preconds = s.preconditions.map((p) => `- ${p}`).join("\n");
  const steps = s.steps.map((st, i) => `${i + 1}. ${st.instruction}`).join("\n");
  const verify = s.steps.map((st) => `- ${st.successCheck}`).join("\n");
  return [
    "---",
    `name: ${s.name}`,
    `description: ${s.intent}`,
    `domain: ${s.meta.domain}`,
    `version: ${s.schemaVersion}`,
    "parameters:",
    params,
    "---",
    "",
    "# When to use",
    s.intent,
    "",
    "# Preconditions",
    preconds,
    "",
    "# Steps",
    steps,
    "",
    "# Verification",
    verify,
    "",
  ].join("\n");
}

function renderManifestJson(s: Skill): string {
  const grounding = s.steps.map((st) => ({
    step_id: st.id,
    description: st.target.description,
    bbox: st.target.bbox ?? null,
    ax_role: st.target.ax_role ?? null,
    ax_name: st.target.ax_name ?? null,
    success_check: st.successCheck,
    fallback: st.fallback ?? null,
  }));
  const manifest = {
    schema: "meeseeks/v0.1",
    name: s.name,
    description: s.intent,
    domain: s.meta.domain,
    parameters: s.inputs,
    preconditions: s.preconditions,
    redacted: s.meta.redacted,
    placeholders: s.meta.placeholders,
    meeseeks: { grounding },
    extensions: s.extensions ?? {},
  };
  return JSON.stringify(manifest, null, 2);
}

function renderActionsToon(s: Skill): string {
  const body = {
    name: s.name,
    intent: s.intent,
    schema_version: s.schemaVersion,
    steps: s.steps.map((st) => stepToToon(st)),
  };
  return TOON_HEADER_ACTIONS + "\n" + yamlStringify(body);
}

function stepToToon(st: Step) {
  return {
    id: st.id,
    action: st.action,
    instruction: st.instruction,
    target_description: st.target.description,
  };
}