import type { ActivateContext, CommandTaskStatus } from "@idea/plugin-sdk";
import { STORAGE_KEYS } from "../constants.js";

export type HelloCommandFeedback =
  | {
      status: "skipped";
      reason: "services-unavailable" | "no-focused-project" | "missing-owner-agent";
      message: string;
    }
  | {
      status: "launched";
      taskId: string;
      state: CommandTaskStatus["state"];
      message: string;
    };

export async function useWorkspaceSdk(ctx: ActivateContext): Promise<void> {
  const workspace = ctx.services?.workspace;
  if (!workspace) return;

  const project = await workspace.getCurrentProject();
  if (!project) {
    ctx.logger.info("workspace service available without a focused project");
    return;
  }

  const listing = await workspace.listDirectory(".ideai", project.id);
  const structure = await workspace.queryStructure({
    projectId: project.id,
    maxDepth: 2,
    maxEntries: 100
  });

  ctx.logger.info("workspace project inspection complete", {
    projectId: project.id,
    ideaiEntries: listing.entries.length,
    conventions: structure.conventions.map((convention) => convention.id)
  });

  const diagnostic = await ctx.services?.tooling.diagnose({
    projectId: project.id,
    tools: [
      {
        id: "echo",
        executable: "echo",
        versionArgs: ["hello-plugin-toolcheck"],
        required: true
      }
    ],
    env: [{ name: "PATH", required: true }],
    files: [{ path: "idea-plugin.json", kind: "file" }]
  });

  ctx.logger.info("tooling diagnostic complete", {
    ok: diagnostic?.ok,
    echoVersion: diagnostic?.tools.find((tool) => tool.id === "echo")?.version,
    messages: diagnostic?.messages
  });

  try {
    const watch = await workspace.watch(".ideai", (event) => {
      ctx.logger.info("workspace watch event", {
        path: event.path,
        kind: event.kind,
        operation: event.operation
      });
    }, project.id);
    ctx.subscriptions.push(watch);
  } catch (error) {
    ctx.logger.info("workspace watch unavailable", { error });
  }

  const events = await ctx.services?.events.subscribe(
    {
      projectId: project.id,
      eventTypes: ["backgroundTaskChanged"],
      pollIntervalMs: 2000,
      onDropped: (count) => ctx.logger.warn("plugin events dropped", { count })
    },
    (event) => {
      if (event.type === "backgroundTaskChanged") {
        ctx.logger.info("background task changed", {
          taskId: event.taskId,
          state: event.state
        });
      }
    }
  );
  if (events) ctx.subscriptions.push(events);
}

export async function runHelloCommandTask(ctx: ActivateContext): Promise<HelloCommandFeedback> {
  if (!ctx.services) {
    const feedback = {
      status: "skipped",
      reason: "services-unavailable",
      message: "The tooling service facade is unavailable for hello-plugin."
    } as const;
    ctx.logger.info("hello command skipped", feedback);
    return feedback;
  }

  const project = await ctx.services.workspace.getCurrentProject();
  if (!project) {
    const feedback = {
      status: "skipped",
      reason: "no-focused-project",
      message: "Open a project before launching the hello-plugin task."
    } as const;
    ctx.logger.info("hello command skipped", feedback);
    return feedback;
  }

  const ownerAgentId = await ctx.storage?.get<string>(STORAGE_KEYS.ownerAgentId);
  if (!ownerAgentId) {
    const feedback = {
      status: "skipped",
      reason: "missing-owner-agent",
      message: "Configure helloPlugin.ownerAgentId in plugin storage before launching the task."
    } as const;
    ctx.logger.info("hello command skipped", feedback);
    return feedback;
  }

  const pluginRoot = ctx.pluginRoot.replace(/[\\/]+$/, "");
  const task = await ctx.services.tasks.runCommand({
    projectId: project.id,
    ownerAgentId,
    label: "Hello plugin command",
    command: "node",
    args: [`${pluginRoot}/scripts/hello-task.mjs`],
    cwd: ".",
    recordOnly: true
  });

  const status = await ctx.services.tasks.getCommandStatus(task.taskId);
  const feedback = {
    status: "launched",
    taskId: task.taskId,
    state: status?.state ?? task.state,
    message: "Started the hello-plugin background command."
  } as const;

  ctx.logger.info("hello command task launched", {
    ...feedback,
    exitCode: status?.exitCode ?? task.exitCode
  });
  return feedback;
}