import { ref, reactive, computed } from 'vue'
import {
  getToolListApi,
  getToolDetailApi,
  createToolApi,
  updateToolApi,
  deleteToolApi,
  getEnabledToolsApi,
  getToolOptionsApi,
  exportToolsApi,
  exportToolWsdlApi,
  importToolsApi,
  importToolsFromWsdlApi,
  executeToolApi,
  batchExecuteToolsApi,
  batchCloneToolsApi,
  cloneToolApi,
  getToolVersionsApi,
  compareToolVersionsApi,
  rollbackToolVersionApi,
  getToolParameterTemplateApi,
  getToolExecutionTrendApi,
  getToolAssetsApi
} from '@/apis/external-systems/tool_api'
import { getEnvironmentListApi } from '@/apis/external-systems/environment_api'
import { getAccessRuleListApi } from '@/apis/external-systems/access_rule_api'
import { unwrap } from './utils'

/**
 * 工具管理 composable
 * 封装工具列表/详情/CRUD/执行/批量/克隆/版本/参数模板/执行趋势/依赖资产/访问规则的 API 调用与状态管理
 *
 * 字段契约对齐 backend/server/routers/external_systems/tool_router.py：
 * - list_tools: query 用 offset/limit（非 skip），limit 默认 100 最大 500
 * - execute: body 用 tool_slug/env_key/arguments（非 tool_id/environment_id/parameters）
 * - batch_execute: body 用 executions: [{tool_slug, system_id, env_key, arguments}]
 * - clone: body 用 system_id（非 target_system_id）
 * - batch_clone: body 用 source_tool_ids（非 tool_ids）
 * - execution_trend: query 用 interval/env_key（非 granularity/environment_id）
 */
export function useExternalTool() {
  // ===== 列表 =====
  const list = ref([])
  const listLoading = ref(false)
  const listError = ref(null)
  const total = ref(0)
  const pagination = reactive({
    current: 1,
    pageSize: 100
  })
  const filters = reactive({
    system_id: undefined,
    category: undefined,
    adapter_type: undefined,
    enabled: undefined,
    keyword: ''
  })

  // ===== 详情 =====
  const detail = ref(null)
  const detailLoading = ref(false)
  const detailError = ref(null)

  // ===== 版本 =====
  const versions = ref([])
  const versionsLoading = ref(false)
  const versionsError = ref(null)
  const compareResult = ref(null)
  const compareLoading = ref(false)
  const compareError = ref(null)

  // ===== 参数模板 =====
  const parameterTemplate = ref(null)
  const parameterTemplateLoading = ref(false)
  const parameterTemplateError = ref(null)

  // ===== 执行趋势 =====
  const executionTrend = ref(null)
  const executionTrendLoading = ref(false)
  const executionTrendError = ref(null)

  // ===== 依赖资产 =====
  const assets = ref(null)
  const assetsLoading = ref(false)
  const assetsError = ref(null)

  // ===== 访问规则（详情页访问规则 Tab）=====
  const accessRules = ref([])
  const accessRulesLoading = ref(false)
  const accessRulesError = ref(null)

  // ===== 选项与启用列表 =====
  const options = ref(null)
  const optionsLoading = ref(false)
  const enabledTools = ref([])
  const enabledToolsLoading = ref(false)

  // ===== 环境列表（用于执行趋势/执行弹窗的环境筛选）=====
  const environments = ref([])
  const environmentsLoading = ref(false)

  // ===== 操作状态 =====
  const submitting = ref(false)
  const submitError = ref(null)
  const executing = ref(false)
  const executeResult = ref(null)
  const executeError = ref(null)
  const cloning = ref(false)
  const batchCloning = ref(false)
  const batchExecuting = ref(false)
  const importing = ref(false)
  const importResult = ref(null)
  const rollingBack = ref(false)

  const isEmpty = computed(() => !list.value?.length)

  // ===== 列表 =====
  async function fetchList() {
    listLoading.value = true
    listError.value = null
    try {
      const params = {
        offset: (pagination.current - 1) * pagination.pageSize,
        limit: pagination.pageSize,
        ...filters
      }
      // 清理 undefined 字段
      Object.keys(params).forEach((k) => {
        if (params[k] === undefined || params[k] === '' || params[k] === null) {
          delete params[k]
        }
      })
      const res = unwrap(await getToolListApi(params))
      list.value = res?.items || []
      total.value = res?.total ?? list.value.length
    } catch (err) {
      listError.value = err
      list.value = []
      total.value = 0
    } finally {
      listLoading.value = false
    }
  }

  function setFilter(newFilters) {
    Object.assign(filters, newFilters)
    pagination.current = 1
  }

  function resetFilters() {
    filters.system_id = undefined
    filters.category = undefined
    filters.adapter_type = undefined
    filters.enabled = undefined
    filters.keyword = ''
    pagination.current = 1
  }

  function setPagination({ page, pageSize }) {
    if (pageSize) pagination.pageSize = pageSize
    if (page) pagination.current = page
  }

  // ===== 详情 =====
  async function fetchDetail(id) {
    detailLoading.value = true
    detailError.value = null
    detail.value = null
    try {
      detail.value = unwrap(await getToolDetailApi(id)) || null
    } catch (err) {
      detailError.value = err
    } finally {
      detailLoading.value = false
    }
  }

  // ===== CRUD =====
  async function create(data) {
    submitting.value = true
    submitError.value = null
    try {
      return unwrap(await createToolApi(data))
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      submitting.value = false
    }
  }

  async function update(id, data) {
    submitting.value = true
    submitError.value = null
    try {
      return unwrap(await updateToolApi(id, data))
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      submitting.value = false
    }
  }

  async function remove(id) {
    submitError.value = null
    try {
      await deleteToolApi(id)
      return true
    } catch (err) {
      submitError.value = err
      throw err
    }
  }

  // ===== 克隆 =====
  async function clone(id, data) {
    cloning.value = true
    submitError.value = null
    try {
      return unwrap(await cloneToolApi(id, data))
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      cloning.value = false
    }
  }

  async function batchClone(data) {
    batchCloning.value = true
    submitError.value = null
    try {
      return unwrap(await batchCloneToolsApi(data))
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      batchCloning.value = false
    }
  }

  // ===== 执行 =====
  async function execute(data) {
    executing.value = true
    executeError.value = null
    executeResult.value = null
    try {
      executeResult.value = unwrap(await executeToolApi(data)) || null
      return executeResult.value
    } catch (err) {
      executeError.value = err
      throw err
    } finally {
      executing.value = false
    }
  }

  async function batchExecute(data) {
    batchExecuting.value = true
    submitError.value = null
    try {
      return unwrap(await batchExecuteToolsApi(data))
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      batchExecuting.value = false
    }
  }

  // ===== 版本 =====
  async function fetchVersions(id, params) {
    versionsLoading.value = true
    versionsError.value = null
    try {
      const res = unwrap(await getToolVersionsApi(id, params))
      versions.value = res?.items || res || []
    } catch (err) {
      versionsError.value = err
      versions.value = []
    } finally {
      versionsLoading.value = false
    }
  }

  async function compareVersions(id, v1, v2) {
    compareLoading.value = true
    compareError.value = null
    compareResult.value = null
    try {
      compareResult.value = unwrap(await compareToolVersionsApi(id, v1, v2)) || null
      return compareResult.value
    } catch (err) {
      compareError.value = err
      throw err
    } finally {
      compareLoading.value = false
    }
  }

  async function rollbackVersion(id, v) {
    rollingBack.value = true
    submitError.value = null
    try {
      return unwrap(await rollbackToolVersionApi(id, v))
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      rollingBack.value = false
    }
  }

  // ===== 参数模板 =====
  async function fetchParameterTemplate(id) {
    parameterTemplateLoading.value = true
    parameterTemplateError.value = null
    parameterTemplate.value = null
    try {
      parameterTemplate.value = unwrap(await getToolParameterTemplateApi(id)) || null
      return parameterTemplate.value
    } catch (err) {
      parameterTemplateError.value = err
      throw err
    } finally {
      parameterTemplateLoading.value = false
    }
  }

  // ===== 执行趋势 =====
  async function fetchExecutionTrend(id, params) {
    executionTrendLoading.value = true
    executionTrendError.value = null
    try {
      executionTrend.value = unwrap(await getToolExecutionTrendApi(id, params)) || null
      return executionTrend.value
    } catch (err) {
      executionTrendError.value = err
    } finally {
      executionTrendLoading.value = false
    }
  }

  // ===== 依赖资产 =====
  async function fetchAssets(id) {
    assetsLoading.value = true
    assetsError.value = null
    try {
      assets.value = unwrap(await getToolAssetsApi(id)) || null
      return assets.value
    } catch (err) {
      assetsError.value = err
    } finally {
      assetsLoading.value = false
    }
  }

  // ===== 访问规则（按 tool_slug 查询，供详情页访问规则 Tab 使用）=====
  async function fetchAccessRules(toolSlug, params = {}) {
    accessRulesLoading.value = true
    accessRulesError.value = null
    try {
      const res = unwrap(await getAccessRuleListApi({ tool_slug: toolSlug, ...params }))
      accessRules.value = res?.items || []
      return accessRules.value
    } catch (err) {
      accessRulesError.value = err
      accessRules.value = []
    } finally {
      accessRulesLoading.value = false
    }
  }

  // ===== 选项与启用列表 =====
  async function fetchOptions(params) {
    optionsLoading.value = true
    try {
      options.value = unwrap(await getToolOptionsApi(params)) || null
      return options.value
    } catch {
      options.value = null
    } finally {
      optionsLoading.value = false
    }
  }

  async function fetchEnabledTools(params) {
    enabledToolsLoading.value = true
    try {
      const res = unwrap(await getEnabledToolsApi(params))
      enabledTools.value = res?.items || res || []
      return enabledTools.value
    } catch {
      enabledTools.value = []
    } finally {
      enabledToolsLoading.value = false
    }
  }

  // ===== 环境列表（用于执行趋势/执行弹窗的环境筛选）=====
  async function fetchEnvironments(params) {
    environmentsLoading.value = true
    try {
      const res = unwrap(await getEnvironmentListApi(params))
      environments.value = res?.items || []
      return environments.value
    } catch {
      environments.value = []
    } finally {
      environmentsLoading.value = false
    }
  }

  // ===== 导入 =====
  async function importTools(data) {
    importing.value = true
    importResult.value = null
    try {
      importResult.value = unwrap(await importToolsApi(data)) || null
      return importResult.value
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      importing.value = false
    }
  }

  async function importFromWsdl(data) {
    importing.value = true
    importResult.value = null
    try {
      importResult.value = unwrap(await importToolsFromWsdlApi(data)) || null
      return importResult.value
    } catch (err) {
      submitError.value = err
      throw err
    } finally {
      importing.value = false
    }
  }

  // ===== 导出（blob）=====
  async function exportTools(params) {
    try {
      const response = await exportToolsApi(params)
      return response
    } catch (err) {
      submitError.value = err
      throw err
    }
  }

  async function exportWsdl(params) {
    try {
      const response = await exportToolWsdlApi(params)
      return response
    } catch (err) {
      submitError.value = err
      throw err
    }
  }

  // ===== 重置 =====
  function resetDetail() {
    detail.value = null
    detailError.value = null
    detailLoading.value = false
  }

  function resetVersions() {
    versions.value = []
    versionsError.value = null
    compareResult.value = null
    compareError.value = null
  }

  function resetExecute() {
    executeResult.value = null
    executeError.value = null
  }

  function resetErrors() {
    listError.value = null
    detailError.value = null
    versionsError.value = null
    compareError.value = null
    parameterTemplateError.value = null
    executionTrendError.value = null
    assetsError.value = null
    accessRulesError.value = null
    submitError.value = null
    executeError.value = null
  }

  return {
    // 列表
    list,
    listLoading,
    listError,
    total,
    pagination,
    filters,
    isEmpty,
    fetchList,
    setFilter,
    resetFilters,
    setPagination,
    // 详情
    detail,
    detailLoading,
    detailError,
    fetchDetail,
    resetDetail,
    // CRUD
    create,
    update,
    remove,
    submitting,
    submitError,
    // 克隆
    clone,
    batchClone,
    cloning,
    batchCloning,
    // 执行
    execute,
    batchExecute,
    executing,
    batchExecuting,
    executeResult,
    executeError,
    resetExecute,
    // 版本
    versions,
    versionsLoading,
    versionsError,
    fetchVersions,
    compareResult,
    compareLoading,
    compareError,
    compareVersions,
    rollbackVersion,
    rollingBack,
    resetVersions,
    // 参数模板
    parameterTemplate,
    parameterTemplateLoading,
    parameterTemplateError,
    fetchParameterTemplate,
    // 执行趋势
    executionTrend,
    executionTrendLoading,
    executionTrendError,
    fetchExecutionTrend,
    // 依赖资产
    assets,
    assetsLoading,
    assetsError,
    fetchAssets,
    // 访问规则
    accessRules,
    accessRulesLoading,
    accessRulesError,
    fetchAccessRules,
    // 选项与启用
    options,
    optionsLoading,
    fetchOptions,
    enabledTools,
    enabledToolsLoading,
    fetchEnabledTools,
    // 环境（用于执行趋势/执行弹窗筛选）
    environments,
    environmentsLoading,
    fetchEnvironments,
    // 导入
    importTools,
    importFromWsdl,
    importing,
    importResult,
    // 导出
    exportTools,
    exportWsdl,
    // 重置
    resetErrors
  }
}