/**
 * acr push <workflow.yaml>
 * 解析三元組，轉成執行圖，直接寫入用戶的 USER_KV（key = workflow:{name}）
 */
import chalk from 'chalk';
import ora from 'ora';
import { loadConfig, getCypherExecutorUrl } from '../lib/config.js';
import { CfKvClient } from '../lib/cf-api.js';
import { loadWorkflowYaml, parseTriplets, validateRelations } from '../lib/yaml-parser.js';

export async function cmdPush(filePath: string): Promise<void> {
  const config = loadConfig();

  const spinner = ora('解析 workflow.yaml').start();
  let workflow;
  try {
    workflow = loadWorkflowYaml(filePath);
    spinner.text = `驗證三元組（${workflow.flow.length} 條）`;
    const triplets = parseTriplets(workflow.flow);
    validateRelations(triplets);
    spinner.succeed(`解析完成：${workflow.name}（${triplets.length} 條三元組）`);
  } catch (e) {
    spinner.fail(chalk.red(`解析失敗：${e instanceof Error ? e.message : e}`));
    process.exit(1);
  }

  // POST 到 cypher-executor 取得執行圖
  const executorUrl = getCypherExecutorUrl(config);
  const triplets = parseTriplets(workflow.flow);
  const searchSpinner = ora(`向 ${executorUrl} 解析執行圖`).start();

  let graph: unknown;
  try {
    const headers: Record<string, string> = { 'Content-Type': 'application/json' };
    if (config.api_key) headers['X-Arcrun-API-Key'] = config.api_key;

    const res = await fetch(`${executorUrl}/cypher/search`, {
      method: 'POST',
      headers,
      body: JSON.stringify({ triplets: workflow.flow }),
    });

    if (!res.ok) {
      const err = await res.text();
      searchSpinner.fail(chalk.red(`執行圖解析失敗（${res.status}）：${err.slice(0, 200)}`));
      process.exit(1);
    }

    const data = await res.json() as { cypher: unknown; missing: string[] };
    if (data.missing.length > 0) {
      searchSpinner.fail(chalk.red(`以下零件不存在：${data.missing.join(', ')}\n執行 acr parts 查看可用零件。`));
      process.exit(1);
    }

    graph = data.cypher;
    searchSpinner.succeed('執行圖解析完成');
  } catch (e) {
    searchSpinner.fail(chalk.red(`網路錯誤：${e instanceof Error ? e.message : e}`));
    process.exit(1);
  }

  // 寫入 USER_KV（key = workflow:{name}）
  const namespaceId = config.mode === 'standard'
    ? config.user_kv_namespace_id!
    : config.webhooks_kv_namespace_id!;

  if (!namespaceId || !config.cloudflare_account_id || !config.cf_api_token) {
    console.error(chalk.red('缺少 KV 設定，請執行 acr init'));
    process.exit(1);
  }

  const kv = new CfKvClient({
    accountId: config.cloudflare_account_id,
    namespaceId,
    apiToken: config.cf_api_token,
  });

  const kvSpinner = ora('寫入 workflow 至 CF KV').start();
  try {
    const workflowDef = {
      name: workflow.name,
      description: workflow.description ?? '',
      graph,
      config: workflow.config ?? {},
      created_at: new Date().toISOString(),
    };
    await kv.put(`workflow:${workflow.name}`, JSON.stringify(workflowDef));
    kvSpinner.succeed(chalk.green(`✓ workflow "${workflow.name}" 已寫入你的 CF KV`));
  } catch (e) {
    kvSpinner.fail(chalk.red(`KV 寫入失敗：${e instanceof Error ? e.message : e}`));
    process.exit(1);
  }

  const executorBase = getCypherExecutorUrl(config);
  const webhookUrl = `${executorBase}/webhooks/${workflow.name}`;
  console.log(chalk.bold(`\n  Webhook URL：${chalk.cyan(webhookUrl)}`));
  if (config.api_key) {
    console.log(chalk.gray(`  （使用時需帶 X-Arcrun-API-Key: ${config.api_key.slice(0, 8)}...）\n`));
  }
  console.log(`  執行：${chalk.cyan(`acr run ${workflow.name}`)}\n`);
}