import axios from 'axios';
import prisma from '../database.js'; // Import Prisma client

import { getSetting } from '../utils/settings.js';
import { askGemini } from '../utils/gemini.js';

const usernameMap = {
  credmore: 'Cameron Redmore',
  dgibson: 'Dane Gibson',
  egzibovskis: 'Ed Gzibovskis',
  ascotney: 'Amanda Scotney',
  gclough: 'Garry Clough',
  slee: 'Sarah Lee',
  dwalker: 'Dave Walker',
  askaith: 'Amy Skaith',
  dpotter: 'Danny Potter',
  msmart: 'Michael Smart',
  // Add other usernames as needed
};

async function getMantisTickets()
{
  const MANTIS_API_KEY = await getSetting('MANTIS_API_KEY');
  const MANTIS_API_ENDPOINT = await getSetting('MANTIS_API_ENDPOINT');

  if (!MANTIS_API_ENDPOINT || !MANTIS_API_KEY)
  {
    throw new Error('Mantis API endpoint or key not configured in environment variables.');
  }
  const url = `${MANTIS_API_ENDPOINT}/issues?project_id=1&page_size=50&select=id,summary,description,created_at,updated_at,reporter,notes`;
  const headers = {
    Authorization: `${MANTIS_API_KEY}`,
    Accept: 'application/json',
    'Content-Type': 'application/json',
  };

  try
  {
    const response = await axios.get(url, { headers });

    const tickets = response.data.issues.filter((ticket) =>
    {
      const ticketDate = new Date(ticket.updated_at);
      const thresholdDate = new Date();
      const currentDay = thresholdDate.getDay(); // Sunday = 0, Monday = 1, ...

      // Go back 4 days if Monday (to include Fri, Sat, Sun), otherwise 2 days
      const daysToSubtract = currentDay === 1 ? 4 : 2;
      thresholdDate.setDate(thresholdDate.getDate() - daysToSubtract);
      thresholdDate.setHours(0, 0, 0, 0); // Start of the day

      return ticketDate >= thresholdDate;
    }).map((ticket) =>
    {
      return {
        id: ticket.id,
        summary: ticket.summary,
        description: ticket.description,
        created_at: ticket.created_at,
        updated_at: ticket.updated_at,
        reporter: usernameMap[ticket.reporter?.username] || ticket.reporter?.name || 'Unknown Reporter', // Safer access
        notes: (ticket.notes ? ticket.notes.filter((note) =>
        {
          const noteDate = new Date(note.created_at);
          const thresholdDate = new Date();
          const currentDay = thresholdDate.getDay();
          const daysToSubtract = currentDay === 1 ? 4 : 2;
          thresholdDate.setDate(thresholdDate.getDate() - daysToSubtract);
          thresholdDate.setHours(0, 0, 0, 0); // Start of the day
          return noteDate >= thresholdDate;
        }) : []).map((note) =>
        {
          const reporter = usernameMap[note.reporter?.username] || note.reporter?.name || 'Unknown Reporter'; // Safer access
          return {
            reporter,
            created_at: note.created_at,
            text: note.text,
          };
        }),
      };
    });

    return tickets;
  }
  catch (error)
  {
    console.error('Error fetching Mantis tickets:', error.message);
    // Check if it's an Axios error and provide more details
    if (axios.isAxiosError(error))
    {
      console.error('Axios error details:', error.response?.status, error.response?.data);
      throw new Error(`Failed to fetch Mantis tickets: ${error.response?.statusText || error.message}`);
    }
    throw new Error(`Failed to fetch Mantis tickets: ${error.message}`);
  }
}

export async function generateAndStoreMantisSummary()
{
  try
  {
    const promptTemplate = await getSetting('MANTIS_PROMPT');

    if (!promptTemplate)
    {
      console.error('Mantis prompt not found in database settings (key: MANTIS_PROMPT). Skipping summary generation.');
      return;
    }

    const tickets = await getMantisTickets();

    let summaryText;
    if (tickets.length === 0)
    {
      summaryText = 'No Mantis tickets updated recently.';
    }
    else
    {
      let prompt = promptTemplate.replaceAll('$DATE', new Date().toISOString().split('T')[0]);
      prompt = prompt.replaceAll('$MANTIS_TICKETS', JSON.stringify(tickets, null, 2));

      summaryText = await askGemini(prompt);
    }

    // Store the summary in the database using Prisma upsert
    const today = new Date();
    today.setUTCHours(0, 0, 0, 0); // Use UTC start of day for consistency

    await prisma.mantisSummary.upsert({
      where: { summaryDate: today },
      update: {
        summaryText: summaryText
      },
      create: {
        summaryDate: today,
        summaryText: summaryText,
      },
    });

  }
  catch (error)
  {
    console.error('Error during Mantis summary generation/storage:', error);
  }
}

export async function generateTodaysSummary()
{
  console.log('Triggering Mantis summary generation via generateTodaysSummary...');
  try
  {
    await generateAndStoreMantisSummary();
    return { success: true, message: 'Summary generation process initiated.' };
  }
  catch (error)
  {
    console.error('Error occurred within generateTodaysSummary while calling generateAndStoreMantisSummary:', error);
    throw new Error('Failed to initiate Mantis summary generation.');
  }
}