import { ExoConfig, ProjectStatus } from "../../types/dashboard";

const DEFAULTS: ExoConfig = {
  project: {
    name: "unnamed",
    author: "Unknown",
    description: "No description",
  },
  runtime: {
    run: "npm start",
    port: 3001,
    autoStart: false,
  },
  state: {
    status: "stopped",
  },
};

function parseBlock(content: string, blockName: string): Record<string, string> {
  const blockRegex = new RegExp(`${blockName}\\s*\\{([^}]*)\\}`, "s");
  const match = content.match(blockRegex);
  if (!match) return {};

  const result: Record<string, string> = {};
  const lines = match[1].split("\n");

  for (const line of lines) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith("#")) continue;

    const eqIdx = trimmed.indexOf("=");
    if (eqIdx === -1) continue;

    const key = trimmed.slice(0, eqIdx).trim();
    const value = trimmed.slice(eqIdx + 1).trim();
    result[key] = value;
  }

  return result;
}

export function parseExoConfig(content: string): ExoConfig {
  const projectBlock = parseBlock(content, "project");
  const runtimeBlock = parseBlock(content, "runtime");
  const stateBlock = parseBlock(content, "state");

  const status = (stateBlock.status ?? DEFAULTS.state.status) as ProjectStatus;
  const validStatuses: ProjectStatus[] = ["running", "stopped", "error", "building"];
  const resolvedStatus: ProjectStatus = validStatuses.includes(status)
    ? status
    : "stopped";

  return {
    project: {
      name: projectBlock.name ?? DEFAULTS.project.name,
      author: projectBlock.author ?? DEFAULTS.project.author,
      description: projectBlock.description ?? DEFAULTS.project.description,
    },
    runtime: {
      run: runtimeBlock.run ?? DEFAULTS.runtime.run,
      port: runtimeBlock.port ? parseInt(runtimeBlock.port, 10) : DEFAULTS.runtime.port,
      autoStart: runtimeBlock.autoStart === "true",
    },
    state: {
      status: resolvedStatus,
    },
  };
}

export function serializeExoConfig(config: ExoConfig): string {
  return `project {
  name = ${config.project.name}
  author = ${config.project.author}
  description = ${config.project.description}
}

runtime {
  run = ${config.runtime.run}
  port = ${config.runtime.port}
  autoStart = ${config.runtime.autoStart}
}

state {
  status = ${config.state.status}
}
`;
}

export function createDefaultExoConfig(name: string, author = "Developer"): ExoConfig {
  return {
    ...DEFAULTS,
    project: {
      ...DEFAULTS.project,
      name,
      author,
    },
  };
}