import type { Plugin } from "@opencode-ai/plugin"
import { join } from "path"
import { homedir } from "os"

interface Config {
  serviceUrl?: string
}

async function loadConfig(directory: string): Promise<Config> {
  // 1. 尝试项目级配置
  try {
    const projectConfig = Bun.file(join(directory, ".opencode", "status-light.json"))
    if (await projectConfig.exists()) {
      return await projectConfig.json()
    }
  } catch {}

  // 2. 尝试全局配置
  try {
    const globalConfig = Bun.file(join(homedir(), ".config", "opencode", "status-light.json"))
    if (await globalConfig.exists()) {
      return await globalConfig.json()
    }
  } catch {}

  return {}
}

export const StatusLightPlugin: Plugin = async ({ directory }) => {
  const config = await loadConfig(directory)
  const serviceUrl = process.env.STATUS_LIGHT_URL || config.serviceUrl || "http://localhost:8080"

  async function sendStatus(code: string) {
    try {
      await fetch(`${serviceUrl}/api/event`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ code, timestamp: new Date().toISOString() }),
      })
    } catch {
      // 静默失败，不影响 OpenCode
    }
  }

  return {
    event: async ({ event }) => {
      let code = ""

      switch (event.type) {
        case "session.idle":
          code = "idle"
          break
        case "session.status":
          code = event.properties?.status?.type || ""
          break
        case "message.part.updated": {
          const part = event.properties?.part
          if (part?.type === "tool") {
            code = part.state?.status || "using_tool"
          } else if (part?.type === "reasoning") {
            code = "reasoning"
          }
          break
        }
        case "permission.asked":
          code = "permission"
          break
        case "session.error":
          code = "error"
          break
      }

      if (code) {
        await sendStatus(code)
      }
    },
  }
}