import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import type { Connection } from '../api/connections'

export interface TerminalTab {
  id: string
  connectionId: number
  title: string
  active: boolean
}

export const useTerminalTabsStore = defineStore('terminalTabs', () => {
  const tabs = ref<TerminalTab[]>([])
  const activeTabId = ref<string | null>(null)

  const activeTab = computed(() => tabs.value.find(t => t.id === activeTabId.value) || null)

  function generateTabId() {
    return `tab-${Date.now()}-${Math.random().toString(16).slice(2)}`
  }

  function openOrFocus(connection: Connection) {
    // 检查是否已存在该连接的标签页
    const existing = tabs.value.find(t => t.connectionId === connection.id)
    if (existing) {
      activate(existing.id)
      return existing.id
    }

    // 创建新标签页
    const newTab: TerminalTab = {
      id: generateTabId(),
      connectionId: connection.id,
      title: connection.name,
      active: true,
    }

    tabs.value.push(newTab)
    activate(newTab.id)
    return newTab.id
  }

  function activate(tabId: string) {
    tabs.value.forEach(t => {
      t.active = t.id === tabId
    })
    activeTabId.value = tabId
  }

  function close(tabId: string) {
    const index = tabs.value.findIndex(t => t.id === tabId)
    if (index === -1) return

    const wasActive = tabs.value[index]!.active
    tabs.value.splice(index, 1)

    // 如果关闭的是活动标签，激活相邻标签
    if (wasActive && tabs.value.length > 0) {
      const newIndex = Math.min(index, tabs.value.length - 1)
      activate(tabs.value[newIndex]!.id)
    } else if (tabs.value.length === 0) {
      activeTabId.value = null
    }
  }

  return {
    tabs,
    activeTabId,
    activeTab,
    openOrFocus,
    activate,
    close,
  }
})