const GRAPHQL_ENDPOINT = 'http://localhost:8080/api/graphql'

// GraphQL请求函数
async function graphqlRequest(query, variables = {}) {
  const response = await fetch(GRAPHQL_ENDPOINT, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query,
      variables,
    }),
  })

  if (!response.ok) {
    throw new Error(`HTTP error! status: ${response.status}`)
  }

  const result = await response.json()
  
  if (result.errors) {
    throw new Error(result.errors[0].message)
  }

  return result.data
}

// 分页查询评分模板列表
export const getRatingSchemes = async (page = 0, size = 10, name = '') => {
  const query = `
    query GetRatingSchemes($page: Int, $size: Int, $name: String) {
      ratingSchemes(page: $page, size: $size, name: $name) {
        content {
          id
          name
          description
          totalScore
          createTime
          updateTime
        }
        totalElements
        totalPages
        number
        size
        first
        last
      }
    }
  `
  
  const variables = { page, size }
  if (name) {
    variables.name = name
  }
  
  const data = await graphqlRequest(query, variables)
  return data.ratingSchemes
}

// 根据ID获取评分模板详情
export const getRatingScheme = async (id) => {
  const query = `
    query GetRatingScheme($id: ID!) {
      ratingScheme(id: $id) {
        id
        name
        description
        totalScore
        items {
          id
          name
          maxScore
          orderNo
        }
        createTime
        updateTime
      }
    }
  `
  
  const data = await graphqlRequest(query, { id })
  return data.ratingScheme
}

// 获取所有评分模板（用于下拉选择）
export const getAllRatingSchemes = async () => {
  const query = `
    query GetAllRatingSchemes {
      allRatingSchemes {
        id
        name
        description
        totalScore
      }
    }
  `
  
  const data = await graphqlRequest(query)
  return data.allRatingSchemes
}

// 保存评分模板
export const saveRatingScheme = async (input) => {
  const mutation = `
    mutation SaveRatingScheme($input: RatingSchemeInput!) {
      saveRatingScheme(input: $input) {
        id
        name
        description
        totalScore
        items {
          id
          name
          maxScore
          orderNo
        }
        createTime
        updateTime
      }
    }
  `
  
  const data = await graphqlRequest(mutation, { input })
  return data.saveRatingScheme
}

// 删除评分模板
export const deleteRatingScheme = async (id) => {
  const mutation = `
    mutation DeleteRatingScheme($id: ID!) {
      deleteRatingScheme(id: $id)
    }
  `
  
  const data = await graphqlRequest(mutation, { id })
  return data.deleteRatingScheme
}