const express = require('express');
const { authenticateAPIKey, verifyToken } = require('../auth');
const {
    getCampaignPreview,
    getCampaignQueueSummary,
    getTopClientsForCampaign,
    processPendingStockCampaigns,
    retryCampaignItems
} = require('../services/campaignService');

const router = express.Router();

const verifyCampaignExportAccess = (req, res, next) => {
    if (req.headers['x-api-key']) {
        authenticateAPIKey(req, res, next);
        return;
    }

    verifyToken(req, res, next);
};

router.get('/campaigns', verifyToken, async (req, res) => {
    try {
        res.json(await getCampaignQueueSummary());
    } catch (error) {
        console.error('Error fetching campaigns:', error);
        res.status(500).json({ error: 'Internal Server Error' });
    }
});

router.get('/campaigns/preview', verifyToken, async (req, res) => {
    try {
        res.json(await getCampaignPreview());
    } catch (error) {
        console.error('Error fetching campaign preview:', error);
        res.status(500).json({ error: 'Internal Server Error' });
    }
});

router.get('/campaigns/top-clients', verifyCampaignExportAccess, async (req, res) => {
    try {
        res.json(await getTopClientsForCampaign(req.query || {}));
    } catch (error) {
        console.error('Error fetching top campaign clients:', error);
        res.status(500).json({ error: 'Internal Server Error' });
    }
});

router.post('/campaigns/process', verifyToken, async (req, res) => {
    try {
        res.json(await processPendingStockCampaigns());
    } catch (error) {
        console.error('Error processing campaigns:', error);
        res.status(500).json({ error: 'Internal Server Error' });
    }
});

router.post('/campaigns/retry', verifyToken, async (req, res) => {
    try {
        res.json(await retryCampaignItems(req.body || {}));
    } catch (error) {
        console.error('Error retrying campaigns:', error);
        res.status(500).json({ error: 'Internal Server Error' });
    }
});

module.exports = router;