import { executeOnce } from "./features/testing/execution";
/**
 * 用例执行器：串行执行步骤 → 断言 → 变量提取 → 生成报告。
 * 与手动发送共用 buildHttpSpec（含环境变量与 Mock）。
 */
import type {
  CollectionNode,
  HttpSpec,
  RequestNode,
  TestRun,
  TestRunTrigger,
  TestStep,
  TestStepResult,
} from "./core/index";
import { evaluateAssertion, extractVariables } from "./core/index";
import { buildHttpSpec } from "./send";
import { activeEnvBaseUrl, activeEnvMap, useWorkspace } from "./workspaceStore";

async function getTransportFn() {
  const { detectTransport } = await import("./transport/index");
  const { transport } = detectTransport({ ginBaseUrl: "" });
  return transport.http.bind(transport);
}

function stepLabel(step: TestStep, node: RequestNode | undefined): string {
  return node?.name ?? "（接口已被删除）";
}

/** 执行单个用例并写入运行记录；返回本次报告 */
export function runTestCase(caseId: string, trigger: TestRunTrigger): Promise<TestRun | null> {
  return executeOnce(caseId, () => executeTestCase(caseId, trigger));
}

async function executeTestCase(caseId: string, trigger: TestRunTrigger): Promise<TestRun | null> {
  const tc = useWorkspace.getState().testCases.find((c) => c.id === caseId);
  if (!tc) return null;

  const http = await getTransportFn();
  const started = performance.now();
  const stepResults: TestStepResult[] = [];

  for (const step of tc.steps) {
    if (!step.enabled) continue;
    const node = findRequestNode(step.nodeId);
    if (!node || node.kind !== "http") {
      stepResults.push({
        stepId: step.id,
        name: stepLabel(step, node),
        method: "—",
        url: "—",
        ok: false,
        httpStatus: null,
        durationMs: null,
        error: node ? "仅支持 HTTP 步骤" : "接口不存在或已被删除",
        assertionResults: [],
      });
      if (!tc.continueOnFailure) break;
      continue;
    }

    const env = activeEnvMap();
    const { timeoutMs, mock } = useWorkspace.getState().settings;
    const spec: HttpSpec = buildHttpSpec(node.data, env, timeoutMs, mock, activeEnvBaseUrl());
    const t0 = performance.now();
    try {
      const res = await http(spec);
      const durationMs = Math.round(performance.now() - t0);
      const stepRes: TestStepResult = {
        stepId: step.id,
        name: node.name,
        method: spec.method,
        url: spec.url,
        ok: true,
        httpStatus: res.status,
        durationMs,
        error: null,
        assertionResults: step.assertions
          .filter((a) => a.enabled)
          .map((a) => evaluateAssertion(res, a)),
      };
      stepRes.ok = stepRes.assertionResults.every((a) => a.passed);

      // 变量提取 → 写入当前环境
      const extracted = extractVariables(res, step.extracts);
      if (Object.keys(extracted).length) {
        useWorkspace.getState().setEnvValues(extracted);
      }
      stepResults.push(stepRes);
      if (!stepRes.ok && !tc.continueOnFailure) break;
    } catch (e) {
      stepResults.push({
        stepId: step.id,
        name: node.name,
        method: spec.method,
        url: spec.url,
        ok: false,
        httpStatus: null,
        durationMs: Math.round(performance.now() - t0),
        error: e instanceof Error ? e.message : String(e),
        assertionResults: [],
      });
      if (!tc.continueOnFailure) break;
    }
  }

  const run: TestRun = {
    id: crypto.randomUUID(),
    caseId: tc.id,
    caseName: tc.name,
    at: Date.now(),
    trigger,
    totalMs: Math.round(performance.now() - started),
    passed: stepResults.length > 0 && stepResults.every((s) => s.ok),
    stepResults,
  };
  useWorkspace.getState().addTestRun(run);
  return run;
}

function findRequestNode(id: string): RequestNode | undefined {
  const { collections } = useWorkspace.getState();
  const walk = (nodes: CollectionNode[]): RequestNode | undefined => {
    for (const n of nodes) {
      if (n.type === "request" && n.id === id) return n;
      if (n.type === "folder") {
        const hit = walk(n.children);
        if (hit) return hit;
      }
    }
    return undefined;
  };
  for (const c of collections) {
    const hit = walk(c.children);
    if (hit) return hit;
  }
  return undefined;
}