import { runCommand } from "./command";
import { type UniDeskConfig, repoRoot } from "./config";

export const dispatchCommands = ["docker.ps", "provider.upgrade", "host.ssh", "microservice.http", "echo"] as const;
export type DebugDispatchCommand = typeof dispatchCommands[number];

export function isDebugDispatchCommand(value: unknown): value is DebugDispatchCommand {
  return dispatchCommands.includes(value as DebugDispatchCommand);
}

async function readJson(url: string, init?: RequestInit): Promise<unknown> {
  const controller = new AbortController();
  const timer = setTimeout(() => controller.abort(), 5000);
  try {
    const res = await fetch(url, { ...init, signal: controller.signal });
    const text = await res.text();
    return { ok: res.ok, status: res.status, body: text.length > 0 ? JSON.parse(text) : null };
  } catch (error) {
    return { ok: false, error: error instanceof Error ? error.message : String(error) };
  } finally {
    clearTimeout(timer);
  }
}

function coreInternalFetch(path: string, init?: { method?: string; body?: unknown }): unknown {
  const code = `
    const res = await fetch(${JSON.stringify(`http://127.0.0.1:8080${path}`)}, ${JSON.stringify({
      method: init?.method ?? "GET",
      headers: init?.body === undefined ? undefined : { "content-type": "application/json" },
      body: init?.body === undefined ? undefined : JSON.stringify(init.body),
    })});
    const text = await res.text();
    let body = null;
    try { body = text ? JSON.parse(text) : null; } catch { body = { text }; }
    console.log(JSON.stringify({ ok: res.ok, status: res.status, body }));
  `;
  const result = runCommand(["docker", "exec", "unidesk-backend-core", "bun", "-e", code], repoRoot);
  if (result.exitCode !== 0) {
    return { ok: false, exitCode: result.exitCode, stdoutTail: result.stdout.slice(-1200), stderrTail: result.stderr.slice(-1200) };
  }
  try {
    return JSON.parse(result.stdout.trim()) as unknown;
  } catch {
    return { ok: true, stdoutTail: result.stdout.slice(-1200), stderrTail: result.stderr.slice(-1200) };
  }
}

function coreDockerStatusSummary(): unknown {
  const code = `
    const res = await fetch('http://127.0.0.1:8080/api/nodes/docker-status');
    const text = await res.text();
    let body = null;
    try { body = text ? JSON.parse(text) : null; } catch { body = { text }; }
    const dockerStatuses = (body?.dockerStatuses || []).map((item) => {
      const status = item.dockerStatus || {};
      return {
        providerId: item.providerId,
        name: item.name,
        nodeStatus: item.nodeStatus,
        updatedAt: item.updatedAt,
        dockerStatus: {
          ok: status.ok,
          socketPresent: status.socketPresent,
          collectedAt: status.collectedAt,
          counts: status.counts,
          daemon: status.daemon,
          containersPreview: (status.containers || []).slice(0, 8).map((container) => ({
            id: container.id,
            name: container.name,
            image: container.image,
            state: container.state,
            status: container.status,
            ports: container.ports,
          })),
        },
      };
    });
    console.log(JSON.stringify({ ok: res.ok, status: res.status, body: { ok: body?.ok === true, dockerStatuses } }));
  `;
  const result = runCommand(["docker", "exec", "unidesk-backend-core", "bun", "-e", code], repoRoot);
  if (result.exitCode !== 0) {
    return { ok: false, exitCode: result.exitCode, stdoutTail: result.stdout.slice(-1200), stderrTail: result.stderr.slice(-1200) };
  }
  try {
    return JSON.parse(result.stdout.trim()) as unknown;
  } catch {
    return { ok: true, stdoutTail: result.stdout.slice(-1200), stderrTail: result.stderr.slice(-1200) };
  }
}

function coreSystemStatusSummary(): unknown {
  const code = `
    const res = await fetch('http://127.0.0.1:8080/api/nodes/system-status?limit=24');
    const text = await res.text();
    let body = null;
    try { body = text ? JSON.parse(text) : null; } catch { body = { text }; }
    const systemStatuses = (body?.systemStatuses || []).map((item) => {
      const current = item.current || {};
      return {
        providerId: item.providerId,
        name: item.name,
        nodeStatus: item.nodeStatus,
        updatedAt: item.updatedAt,
        current: item.current ? {
          ok: current.ok,
          collectedAt: current.collectedAt,
          cpu: current.cpu,
          memory: current.memory,
          disk: current.disk,
        } : null,
        historyPreview: (item.history || []).slice(-8),
        historyCount: (item.history || []).length,
      };
    });
    console.log(JSON.stringify({ ok: res.ok, status: res.status, body: { ok: body?.ok === true, systemStatuses } }));
  `;
  const result = runCommand(["docker", "exec", "unidesk-backend-core", "bun", "-e", code], repoRoot);
  if (result.exitCode !== 0) {
    return { ok: false, exitCode: result.exitCode, stdoutTail: result.stdout.slice(-1200), stderrTail: result.stderr.slice(-1200) };
  }
  try {
    return JSON.parse(result.stdout.trim()) as unknown;
  } catch {
    return { ok: true, stdoutTail: result.stdout.slice(-1200), stderrTail: result.stderr.slice(-1200) };
  }
}

export async function debugHealth(config: UniDeskConfig): Promise<unknown> {
  return {
    coreInternal: await coreInternalFetch("/health"),
    overviewInternal: await coreInternalFetch("/api/overview"),
    nodesInternal: await coreInternalFetch("/api/nodes"),
    systemStatusInternal: coreSystemStatusSummary(),
    dockerStatusInternal: coreDockerStatusSummary(),
    frontendPublic: await readJson(`http://127.0.0.1:${config.network.frontend.port}/health`),
    providerIngressPublic: await readJson(`http://127.0.0.1:${config.network.providerIngress.port}/health`),
    publicExposureBoundary: {
      coreHostPort: { port: config.network.core.port, expected: "not-exposed" },
      databaseHostPort: { port: config.network.database.port, expected: "not-exposed" },
    },
  };
}

async function waitForTask(taskId: string, timeoutMs: number): Promise<unknown> {
  const started = Date.now();
  let latest: unknown = null;
  while (Date.now() - started < timeoutMs) {
    latest = coreInternalFetch("/api/tasks?limit=100");
    const tasks = (latest as { body?: { tasks?: Array<{ id?: string; status?: string; result?: unknown }> } }).body?.tasks ?? [];
    const task = tasks.find((item) => item.id === taskId);
    if (task?.status === "succeeded" || task?.status === "failed") return { ok: true, task };
    await Bun.sleep(500);
  }
  return { ok: false, timeoutMs, latest };
}

export async function debugTask(_config: UniDeskConfig, taskId: string): Promise<unknown> {
  const tasksResponse = coreInternalFetch("/api/tasks?limit=100");
  const tasks = (tasksResponse as { body?: { tasks?: Array<{ id?: string }> } }).body?.tasks ?? [];
  const task = taskId === "latest" ? tasks[0] : tasks.find((item) => item.id === taskId);
  return { tasksResponse, taskId, task: task ?? null };
}

export async function debugDispatch(
  config: UniDeskConfig,
  providerId: string,
  command: DebugDispatchCommand,
  payload?: Record<string, unknown>,
  waitMs = 0,
): Promise<unknown> {
  const dispatchPayload = payload ?? (command === "provider.upgrade" ? { source: "cli-debug", mode: "plan" } : { source: "cli-debug" });
  const dispatch = coreInternalFetch("/api/dispatch", {
    method: "POST",
    body: { providerId, command, payload: dispatchPayload },
  });
  const taskId = (dispatch as { body?: { taskId?: string } }).body?.taskId ?? "";
  const wait = waitMs > 0 && taskId.length > 0 ? await waitForTask(taskId, waitMs) : null;
  return { dispatch, wait };
}