import { ipcMain } from "electron";
import type { HandlerContext } from "@shared/types/ipc";
import { FEATURES } from "@shared/featureFlags";
import { agentService } from "../services/engines/unifiedAgent";
import { mcpProxyManager } from "../services/packages/mcp";
import { getComputerServerStatus } from "../services/computerServer";
import { getGuiAgentServerStatus } from "../services/packages/guiAgentServer";
import { getWindowsMcpStatus } from "../services/packages/windowsMcp";
import { isWindows } from "../services/system/shellEnv";
import {
  recordDigitalEmployeeSnapshot,
  recordDigitalEmployeeGovernanceCommand,
  readDigitalEmployeeRuntimeRecords,
  readDigitalEmployeeState,
  readDigitalEmployeeUiState,
  saveDigitalEmployeeUiState,
  type DigitalEmployeeManagedService,
  type DigitalEmployeeGovernanceCommandRecord,
  type DigitalEmployeeServiceStatus,
  type DigitalEmployeeSnapshot,
  type DigitalEmployeeUiStateUpdate,
} from "../services/digitalEmployee/stateService";
import {
  flushDigitalEmployeeSyncOutbox,
  getDigitalEmployeeSyncStatus,
} from "../services/digitalEmployee/syncService";
import { listDigitalEmployeePlanTemplates } from "../services/digitalEmployee/planTemplateService";
import { listDigitalEmployeeSkillCapabilities } from "../services/digitalEmployee/skillCatalogService";

export function registerDigitalEmployeeHandlers(ctx: HandlerContext): void {
  ipcMain.handle("digitalEmployee:getSnapshot", async () => {
    const snapshot = buildSnapshot(ctx);
    const state = recordDigitalEmployeeSnapshot(snapshot);
    return {
      ...snapshot,
      state: {
        updatedAt: state.updatedAt,
        events: state.events,
      },
    };
  });

  ipcMain.handle("digitalEmployee:getState", async () => {
    return readDigitalEmployeeState();
  });

  ipcMain.handle("digitalEmployee:getRuntimeRecords", async () => {
    return readDigitalEmployeeRuntimeRecords();
  });

  ipcMain.handle("digitalEmployee:getUiState", async () => {
    return readDigitalEmployeeUiState();
  });

  ipcMain.handle("digitalEmployee:getSkillCapabilities", async () => {
    return listDigitalEmployeeSkillCapabilities();
  });

  ipcMain.handle("digitalEmployee:getPlanTemplates", async () => {
    return listDigitalEmployeePlanTemplates();
  });

  ipcMain.handle(
    "digitalEmployee:saveUiState",
    async (_, update: DigitalEmployeeUiStateUpdate) => {
      return saveDigitalEmployeeUiState(update);
    },
  );

  ipcMain.handle("digitalEmployee:getSyncStatus", async () => {
    return getDigitalEmployeeSyncStatus();
  });

  ipcMain.handle("digitalEmployee:flushSync", async () => {
    return flushDigitalEmployeeSyncOutbox({ force: true });
  });

  ipcMain.handle(
    "digitalEmployee:recordGovernanceCommand",
    async (_, command: DigitalEmployeeGovernanceCommandRecord) => {
      return recordDigitalEmployeeGovernanceCommand(command);
    },
  );
}

function buildSnapshot(ctx: HandlerContext): DigitalEmployeeSnapshot {
  const sessions = agentService.listAllSessionsDetailed();
  const generatedAt = new Date().toISOString();
  const services = {
    agent: {
      running: agentService.isReady,
      engineType: agentService.getEngineType(),
    },
    mcp: normalizeServiceStatus(mcpProxyManager.getStatus()),
    computerServer: normalizeServiceStatus(getComputerServerStatus()),
    lanproxy: normalizeServiceStatus(ctx.lanproxy.status()),
    fileServer: normalizeServiceStatus(ctx.fileServer.status()),
    guiServer: normalizeServiceStatus(getGuiStatus()),
  } satisfies Record<string, DigitalEmployeeServiceStatus | null>;
  return {
    generatedAt,
    services,
    managedServices: buildManagedServices(services, generatedAt),
    sessions: {
      total: sessions.length,
      active: sessions.filter((session) =>
        session.status === "active" || session.status === "pending",
      ).length,
      items: sessions.slice(0, 10),
    },
  };
}

function buildManagedServices(
  services: Record<string, DigitalEmployeeServiceStatus | null>,
  generatedAt: string,
): DigitalEmployeeManagedService[] {
  return MANAGED_SERVICE_DEFINITIONS.map((definition) => {
    const status = services[definition.serviceId] ?? { running: false };
    const error = status.error ?? null;
    const running = status.running === true;
    const state = error ? "degraded" : running ? "running" : "stopped";
    return {
      serviceId: definition.serviceId,
      name: definition.name,
      kind: definition.kind,
      status: state,
      statusLabel: state === "running" ? "运行中" : state === "degraded" ? "异常" : "未运行",
      running,
      error,
      requiresHumanAction: Boolean(error || (!running && definition.required)),
      dependentTasks: definition.dependentTasks,
      restartCount: 0,
      lastSeenAt: generatedAt,
      instance: {
        pid: status.pid,
        port: status.port,
        engineType: status.engineType,
        serverCount: status.serverCount,
        serverNames: status.serverNames,
      },
      lease: {
        state: state === "running" ? "active" : state,
        updatedAt: generatedAt,
      },
    };
  });
}

const MANAGED_SERVICE_DEFINITIONS: Array<{
  serviceId: string;
  name: string;
  kind: DigitalEmployeeManagedService["kind"];
  required: boolean;
  dependentTasks: string[];
}> = [
  {
    serviceId: "agent",
    name: "Agent",
    kind: "agent",
    required: true,
    dependentTasks: ["ACP 会话执行", "Plan Agent", "Task Agent"],
  },
  {
    serviceId: "mcp",
    name: "MCP Proxy",
    kind: "mcp",
    required: true,
    dependentTasks: ["Skill Catalog", "MCP 工具调用"],
  },
  {
    serviceId: "computerServer",
    name: "Computer Server",
    kind: "desktop",
    required: true,
    dependentTasks: ["/computer/chat", "远程任务接入"],
  },
  {
    serviceId: "fileServer",
    name: "File Server",
    kind: "file",
    required: false,
    dependentTasks: ["Artifact 上传", "文件交付"],
  },
  {
    serviceId: "lanproxy",
    name: "Lanproxy",
    kind: "network",
    required: false,
    dependentTasks: ["远程访问", "管理端回连"],
  },
  {
    serviceId: "guiServer",
    name: "GUI Agent Server",
    kind: "gui",
    required: false,
    dependentTasks: ["GUI 自动化", "桌面操作"],
  },
];

function normalizeServiceStatus(
  value: object | null | undefined,
): DigitalEmployeeServiceStatus {
  if (!value) return { running: false };
  const record = value as Record<string, unknown>;
  return {
    running: record.running === true,
    error: typeof record.error === "string" ? record.error : undefined,
    engineType: typeof record.engineType === "string" ? record.engineType : undefined,
    port: typeof record.port === "number" ? record.port : undefined,
    serverCount: typeof record.serverCount === "number" ? record.serverCount : undefined,
    serverNames: Array.isArray(record.serverNames)
      ? record.serverNames.filter((item): item is string => typeof item === "string")
      : undefined,
    pid: typeof record.pid === "number" ? record.pid : undefined,
  };
}

function getGuiStatus(): object {
  if (!FEATURES.ENABLE_GUI_AGENT_SERVER) {
    return { running: false, error: "GUI Agent Server is not available" };
  }
  return isWindows() ? getWindowsMcpStatus() : getGuiAgentServerStatus();
}