// 比赛管理 API

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

// GraphQL 查询语句
const GET_ACTIVITIES_QUERY = `
  query GetActivities($page: Int!, $size: Int!, $name: String) {
    activities(page: $page, size: $size, name: $name) {
      content {
        id
        name
        description
        signupDeadline
        matchTime
        address
        playerMax
        state
        stateName
        playerCount
        createTime
        ratingScheme {
          id
          name
        }
      }
      totalElements
      page
      size
    }
  }
`;

const GET_ACTIVITY_QUERY = `
  query GetActivity($id: ID!) {
    activity(id: $id) {
      id
      pid
      name
      description
      signupDeadline
      matchTime
      address
      ratingSchemeId
      playerMax
      state
      stateName
      createTime
      updateTime
      ratingScheme {
        id
        name
        totalScore
      }
      stages {
        id
        name
        description
        matchTime
        address
        ratingSchemeId
        playerMax
        state
        stateName
        ratingScheme {
          id
          name
        }
      }
    }
  }
`;

const GET_ALL_ACTIVITIES_QUERY = `
  query GetAllActivities {
    allActivities {
      id
      name
      state
      stateName
    }
  }
`;

const SAVE_ACTIVITY_MUTATION = `
  mutation SaveActivity($input: ActivityInput!) {
    saveActivity(input: $input) {
      id
      name
      description
      signupDeadline
      matchTime
      address
      ratingSchemeId
      playerMax
      state
      stateName
    }
  }
`;

const DELETE_ACTIVITY_MUTATION = `
  mutation DeleteActivity($id: ID!) {
    deleteActivity(id: $id)
  }
`;

// API 函数
export const getActivities = async (page = 0, size = 10, name = '') => {
  const response = await fetch(GRAPHQL_ENDPOINT, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query: GET_ACTIVITIES_QUERY,
      variables: { page, size, name }
    })
  });

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

export const getActivity = async (id) => {
  const response = await fetch(GRAPHQL_ENDPOINT, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query: GET_ACTIVITY_QUERY,
      variables: { id }
    })
  });

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

export const getAllActivities = async () => {
  const response = await fetch(GRAPHQL_ENDPOINT, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query: GET_ALL_ACTIVITIES_QUERY
    })
  });

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

export const saveActivity = async (activityData) => {
  const response = await fetch(GRAPHQL_ENDPOINT, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query: SAVE_ACTIVITY_MUTATION,
      variables: { input: activityData }
    })
  });

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

export const deleteActivity = async (id) => {
  const response = await fetch(GRAPHQL_ENDPOINT, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      query: DELETE_ACTIVITY_MUTATION,
      variables: { id }
    })
  });

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