import test from "node:test";
import assert from "node:assert/strict";
import { execFile } from "node:child_process";
import { mkdtemp, mkdir, stat, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { resolve } from "node:path";
import { promisify } from "node:util";
import { UiRunService, readRunMetaBySession } from "../src/ui/run-service.js";

const execFileAsync = promisify(execFile);

async function waitForTerminalRun(
  runService: UiRunService,
  runId: string,
): Promise<"success" | "failure" | "cancelled"> {
  const maxPolls = 100;
  for (let index = 0; index < maxPolls; index += 1) {
    const run = runService.getRun(runId);
    if (run && run.status !== "running") {
      return run.status;
    }
    await new Promise((resolveWait) => setTimeout(resolveWait, 20));
  }
  throw new Error("Run did not reach a terminal status within polling window.");
}

test("run service persists failure when pipeline summary is failure", async () => {
  const workspaceRoot = await mkdtemp(resolve(tmpdir(), "ai-ops-run-service-"));
  const stateRoot = resolve(workspaceRoot, "state");
  const projectContextPath = resolve(workspaceRoot, "project-context.json");
  const envPath = resolve(workspaceRoot, ".env");

  await writeFile(
    envPath,
    [
      `AGENT_STATE_ROOT=${stateRoot}`,
      `AGENT_PROJECT_CONTEXT_PATH=${projectContextPath}`,
    ].join("\n"),
    "utf8",
  );

  const runService = new UiRunService({
    workspaceRoot,
    envFilePath: ".env",
  });

  const manifest = {
    schemaVersion: "1",
    topologies: ["sequential"],
    personas: [
      {
        id: "writer",
        displayName: "Writer",
        systemPromptTemplate: "Write the draft",
        toolClearance: {
          allowlist: ["read_file", "write_file"],
          banlist: [],
        },
      },
    ],
    relationships: [],
    topologyConstraints: {
      maxDepth: 1,
      maxRetries: 0,
    },
    pipeline: {
      entryNodeId: "write-node",
      nodes: [
        {
          id: "write-node",
          actorId: "writer-actor",
          personaId: "writer",
          topology: {
            kind: "sequential",
          },
          constraints: {
            maxRetries: 0,
          },
        },
      ],
      edges: [],
    },
  };

  const started = await runService.startRun({
    prompt: "force validation failure on first attempt",
    manifest,
    executionMode: "mock",
    simulateValidationNodeIds: ["write-node"],
  });

  const terminalStatus = await waitForTerminalRun(runService, started.runId);
  assert.equal(terminalStatus, "failure");

  const persisted = await readRunMetaBySession({
    stateRoot,
    sessionId: started.sessionId,
  });
  assert.equal(persisted?.status, "failure");
});

test("run service creates, runs, and closes explicit sessions", async () => {
  const workspaceRoot = await mkdtemp(resolve(tmpdir(), "ai-ops-run-service-session-"));
  const stateRoot = resolve(workspaceRoot, "state");
  const envPath = resolve(workspaceRoot, ".env");
  const projectPath = resolve(workspaceRoot, "project");

  await mkdir(projectPath, { recursive: true });
  await execFileAsync("git", ["init", projectPath], { encoding: "utf8" });
  await execFileAsync("git", ["-C", projectPath, "config", "user.name", "AI Ops"], { encoding: "utf8" });
  await execFileAsync("git", ["-C", projectPath, "config", "user.email", "ai-ops@example.local"], { encoding: "utf8" });
  await writeFile(resolve(projectPath, "README.md"), "# project\n", "utf8");
  await execFileAsync("git", ["-C", projectPath, "add", "README.md"], { encoding: "utf8" });
  await execFileAsync("git", ["-C", projectPath, "commit", "-m", "initial"], { encoding: "utf8" });

  await writeFile(
    envPath,
    [
      `AGENT_STATE_ROOT=${stateRoot}`,
      "AGENT_WORKTREE_ROOT=.ai_ops/worktrees",
      "AGENT_WORKTREE_BASE_REF=HEAD",
    ].join("\n"),
    "utf8",
  );

  const runService = new UiRunService({
    workspaceRoot,
    envFilePath: ".env",
  });

  const createdSession = await runService.createSession({
    projectPath,
  });
  assert.equal(createdSession.sessionStatus, "active");

  const manifest = {
    schemaVersion: "1",
    topologies: ["sequential"],
    personas: [
      {
        id: "writer",
        displayName: "Writer",
        systemPromptTemplate: "Write draft",
        toolClearance: {
          allowlist: ["read_file", "write_file"],
          banlist: [],
        },
      },
    ],
    relationships: [],
    topologyConstraints: {
      maxDepth: 1,
      maxRetries: 0,
    },
    pipeline: {
      entryNodeId: "write-node",
      nodes: [
        {
          id: "write-node",
          actorId: "writer-actor",
          personaId: "writer",
        },
      ],
      edges: [],
    },
  };

  const started = await runService.startRun({
    prompt: "complete task",
    manifest,
    sessionId: createdSession.sessionId,
    executionMode: "mock",
  });

  const terminalStatus = await waitForTerminalRun(runService, started.runId);
  assert.equal(terminalStatus, "success");

  const closed = await runService.closeSession({
    sessionId: createdSession.sessionId,
  });
  assert.equal(closed.sessionStatus, "closed");

  await assert.rejects(() => stat(createdSession.baseWorkspacePath), {
    code: "ENOENT",
  });
});