import { readFileSync } from "node:fs";
import { resolve } from "node:path";
import { normalizeMcpConfig } from "./mcp-config.js";
import { compileOpencodeModels, loadAgentModelConfig, type AgentModelConfig } from "../chat/modelConfig.js";

// A conversation Location can be outside the checkout. Load only the trusted
// service assets explicitly, rather than relying on its current directory.
export function serviceOpencodeConfig(input: Record<string, unknown>, models: AgentModelConfig = loadAgentModelConfig()) {
  const agents = (input.agents ?? {}) as Record<string, unknown>;
  const instruction = (agents.instruction ?? {}) as Record<string, unknown>;
  const system = readFileSync(resolve(".opencode/agents/instruction.md"), "utf8")
    .replace(/^---\s*\n[\s\S]*?\n---\s*\n/, "");
  return {
    ...input,
    ...compileOpencodeModels(models),
    snapshots: false,
    mcp: normalizeMcpConfig(input.mcp),
    plugins: ["*", ...((input.plugins ?? []) as unknown[]), resolve(".opencode/tjwater-plugin")],
    skills: [resolve(process.env.OPENCODE_SKILLS_ROOT_DIR ?? ".opencode/skills")],
    agents: { ...agents, instruction: {
      description: "TJWater structured data and UI agent", mode: "primary", ...instruction, model: models.default_model, system,
    } },
  };
}