import axios from 'axios';

export default async function fetchGraph(endpoint: string, token: string, extraHeaders = {}) {
  try {
    const url = `https://graph.microsoft.com/v1.0${endpoint}`;
    console.log('📡 Calling:', url);

    // Decode token to inspect (only for debugging)
    try {
      const tokenParts = token.split('.');
      if (tokenParts.length === 3) {
        const payload = JSON.parse(Buffer.from(tokenParts[1], 'base64').toString());
        console.log('🔍 Token info:', {
          aud: payload.aud,
          iss: payload.iss,
          exp: new Date(payload.exp * 1000).toISOString(),
          scp: payload.scp,
          upn: payload.upn || payload.preferred_username,
        });
      }
    } catch (e) {
      console.log('⚠️  Could not decode token');
    }

    const response = await axios.get(url, {
      headers: {
        Authorization: `Bearer ${token}`,
        'Content-Type': 'application/json',
        ...extraHeaders,
      },
    });

    return response.data;
  } catch (error: any) {
    if (error.response) {
      const errorData = error.response.data;
      console.error('Graph API Error:', {
        status: error.response.status,
        data: errorData,
        headers: error.response.headers,
        wwwAuthenticate: error.response.headers['www-authenticate'],
      });

      throw new Error(
        `Graph API error (${error.response.status}): ${errorData.error?.message || JSON.stringify(errorData)}`
      );
    }
    throw new Error(`Graph API request failed: ${error.message}`);
  }
}

export async function postGraph(endpoint: string, token: string, body: any, extraHeaders = {}) {
  try {
    const url = `https://graph.microsoft.com/v1.0${endpoint}`;
    console.log('📡 Posting to:', url);
    console.log('📦 Body:', JSON.stringify(body, null, 2));

    const response = await axios.post(url, body, {
      headers: {
        Authorization: `Bearer ${token}`,
        'Content-Type': 'application/json',
        ...extraHeaders,
      },
    });

    return response.data;
  } catch (error: any) {
    if (error.response) {
      const errorData = error.response.data;
      console.error('Graph API Error:', {
        status: error.response.status,
        data: errorData,
        headers: error.response.headers,
        wwwAuthenticate: error.response.headers['www-authenticate'],
      });

      throw new Error(
        `Graph API error (${error.response.status}): ${errorData.error?.message || JSON.stringify(errorData)}`
      );
    }
    throw new Error(`Graph API request failed: ${error.message}`);
  }
}

export async function patchGraph(endpoint: string, token: string, body: any, extraHeaders = {}) {
  try {
    const url = `https://graph.microsoft.com/v1.0${endpoint}`;
    console.log('📡 Patching to:', url);
    console.log('📦 Body:', JSON.stringify(body, null, 2));

    const response = await axios.patch(url, body, {
      headers: {
        Authorization: `Bearer ${token}`,
        'Content-Type': 'application/json',
        ...extraHeaders,
      },
    });

    return response.data;
  } catch (error: any) {
    if (error.response) {
      const errorData = error.response.data;
      console.error('Graph API Error:', {
        status: error.response.status,
        data: errorData,
        headers: error.response.headers,
        wwwAuthenticate: error.response.headers['www-authenticate'],
      });

      throw new Error(
        `Graph API error (${error.response.status}): ${errorData.error?.message || JSON.stringify(errorData)}`
      );
    }
    throw new Error(`Graph API request failed: ${error.message}`);
  }
}