import path from "node:path";
import { ConfigError, loadConfig } from "../../lib/config/load";
import type { ScriptConfig } from "../../lib/config/schema";
import { loadDotenv } from "../lib/env-file";
import { resolveConfigPath } from "../lib/paths";

export interface ScriptsOptions {
  config?: string;
}

function loadScripts(opts: ScriptsOptions): ScriptConfig[] | null {
  const configPath = resolveConfigPath(opts.config);
  loadDotenv(path.join(path.dirname(configPath), ".env"));

  try {
    return loadConfig(configPath).config.scripts;
  } catch (error) {
    if (error instanceof ConfigError) {
      console.error(`Config error: ${error.message}`);
      for (const issue of error.issues) console.error(`  - ${issue}`);
      process.exitCode = 1;
      return null;
    }
    throw error;
  }
}

export async function scriptsListCommand(opts: ScriptsOptions): Promise<void> {
  const scripts = loadScripts(opts);
  if (!scripts) return;

  if (scripts.length === 0) {
    console.log("No scripts configured.");
    return;
  }

  const idWidth = Math.max(...scripts.map((s) => s.id.length));
  for (const script of scripts) {
    const description = script.description ? ` - ${script.description}` : "";
    console.log(`${script.id.padEnd(idWidth)}  ${script.name}${description}`);
  }
}

export async function scriptsShowCommand(
  scriptId: string,
  opts: ScriptsOptions,
): Promise<void> {
  const scripts = loadScripts(opts);
  if (!scripts) return;

  const script = scripts.find((s) => s.id === scriptId);
  if (!script) {
    console.error(`No script '${scriptId}' configured.`);
    if (scripts.length > 0) {
      console.error(
        `Available scripts: ${scripts.map((s) => s.id).join(", ")}`,
      );
    }
    process.exitCode = 1;
    return;
  }

  console.log(script.name);
  if (script.description) console.log(script.description);
  console.log(
    `\ncommand: ${script.command} ${script.args.join(" ")}`.trimEnd(),
  );

  if (script.variables.length === 0) {
    console.log("\nThis script takes no parameters.");
    return;
  }

  console.log("\nvariables:");
  for (const variable of script.variables) {
    const parts: string[] = [variable.type];
    if (variable.required) parts.push("required");
    if (variable.type === "enum" || variable.type === "multiselect") {
      parts.push(`choices: ${variable.choices.join(", ")}`);
    }
    if (variable.default !== undefined) {
      parts.push(`default: ${JSON.stringify(variable.default)}`);
    }
    console.log(`  ${variable.name} (${parts.join(", ")})`);
  }
}