const { getStoreLocation, getStoreRegisters, getStorePrinters, getStorePaymentTerminals } = require('../services/siw');
const { findMerakiNetwork, getMerakiDeviceAvailabilities, getMerakiClients } = require('../services/meraki');
const { formatStoreReport } = require('../utils/formatter');

function formatLastSeen(lastSeen) {
    if (!lastSeen) return 'N/A';
    const now = new Date();
    const seen = new Date(lastSeen);
    const diffMs = now - seen;
    const diffMin = Math.floor(diffMs / 60000);

    if (diffMin < 1) return 'Just now';
    if (diffMin < 60) return `${diffMin} min ago`;
    const hours = Math.floor(diffMin / 60);
    return `${hours} hr ago`;
}

async function getStoreDetail(storeNumber) {
    console.log(`🔍 Starting full analysis for store ${storeNumber}`);

    let locationData, merakiNetwork, registers, printers, paymentTerminals, merakiClients = [], mdmDevices = [];

    try {
        // Phase 1: Fast lookups
        [locationData, merakiNetwork] = await Promise.all([
            getStoreLocation(storeNumber),
            findMerakiNetwork(storeNumber)
        ]);

        // Phase 2: Heavy parallel lookups
        const parallelPromises = [
            getStoreRegisters(storeNumber),
            getStorePrinters(storeNumber),
            getStorePaymentTerminals(storeNumber)
        ];

        if (merakiNetwork) {
            parallelPromises.push(
                getMerakiClients(merakiNetwork.id),
                require('../services/mdm').getMDMDevices(storeNumber)
            );
        }

        const results = await Promise.all(parallelPromises);

        registers = results[0];
        printers = results[1];
        paymentTerminals = results[2];

        if (merakiNetwork) {
            console.log(`Meraki Network:`)
            console.log(JSON.stringify(merakiNetwork, null, 2))
            merakiClients = results[3] || [];
            mdmDevices = results[4] || [];
        }

        console.log(`✅ Fetched: ${registers?.length || 0} registers, ${printers?.length || 0} printers, ${paymentTerminals?.length || 0} payment terminals`);
        if (merakiNetwork) {
            console.log(`✅ Fetched ${merakiClients.length} Meraki clients`);
            console.log(`✅ Fetched ${mdmDevices.length} MDM devices`);
        }

    } catch (err) {
        console.error('❌ Error fetching data:', err.message);
    }

    let report = formatStoreReport(locationData, storeNumber);

    // === Meraki Network Hardware ===
    if (merakiNetwork) {
        report += `**🌐 [${merakiNetwork.name}](${merakiNetwork.url})**\n\n`;

        let activeDevices = [];
        try {
            const availabilities = await getMerakiDeviceAvailabilities(merakiNetwork.id);
            activeDevices = availabilities.filter(d => d.status !== 'dormant');
        } catch (e) {
            console.error('Device availabilities failed:', e.message);
        }

        // Sort: Rear Switch → Front Switch → APs
        activeDevices.sort((a, b) => {
            const nameA = (a.name || '').trim().toUpperCase();
            const nameB = (b.name || '').trim().toUpperCase();

            if (nameA.includes('SWR') || /SW.*R\d?$/.test(nameA)) return -1;
            if (nameB.includes('SWR') || /SW.*R\d?$/.test(nameB)) return 1;

            if (nameA.includes('SWF') || /SW.*F\d/.test(nameA)) return -1;
            if (nameB.includes('SWF') || /SW.*F\d/.test(nameB)) return 1;

            return nameA.localeCompare(nameB);
        });

        report += `**🛠️ Active Network Devices (${activeDevices.length})**\n`;

        activeDevices.forEach(dev => {
            const statusEmoji = dev.status === 'online' ? '✅' : '⚠️';
            const deviceName = (dev.name || dev.serial || 'Unknown').trim();

            report += `**${deviceName}** — ${statusEmoji} ${dev.status}`;

            if (dev.serial && merakiNetwork.url) {
                // Extract short network code from the URL (e.g. JCz-ucnd)
                const urlParts = merakiNetwork.url.split('/n/');
                const networkCode = urlParts[1] ? urlParts[1].split('/')[0] : merakiNetwork.id;

                let link = `${urlParts[0]}/n/${networkCode}`;

                if (dev.productType === 'switch') {
                    link += `/manage/switches/${dev.serial}/summary`;
                } else if (dev.productType === 'wireless') {
                    link += `/manage/access_points/${dev.serial}/summary`;
                } else {
                    link += `/manage/${dev.serial}/summary`;
                }

                report += ` → [Dashboard](${link})`;
            }
            report += `\n`;
        });
    } else {
        report += `\n⚠️ No matching Meraki network found.\n`;
    }

    // === Store Registers ===
    if (registers && registers.length > 0) {
        report += `\n**🖥️ Store Registers (${registers.length})**\n`;

        registers.forEach(reg => {
            const regNum = reg.register_number ? `Register ${reg.register_number}` : 'Register';
            const brand = reg.brand_display_name || 'Unknown';
            const type = reg.register_type_name || 'Unknown';
            const name = (reg.register_display_name || reg.printer_name || 'Unknown').trim();

            const match = merakiClients.find(c =>
                c?.description &&
                (c.description.trim().toLowerCase() === name.toLowerCase() ||
                    c.description.includes(name))
            );

            const status = match
                ? (match.status === 'Online' ? '✅ Online' : '❌ Offline')
                : '❓ Unknown';

            const lastSeen = match ? formatLastSeen(match.lastSeen) : '';
            const deviceName = match?.recentDeviceName ? ` via ${match.recentDeviceName}` : '';
            const connection = match?.recentDeviceConnection ? ` (${match.recentDeviceConnection})` : '';

            let link = '';
            if (match && merakiNetwork?.url) {
                const networkCode = merakiNetwork.url.split('/n/')[1]?.split('/')[0] || merakiNetwork.id;
                link = ` → [Meraki Client](https://n976.dashboard.meraki.com/${merakiNetwork.name.replace(/ /g, '-')}/n/${networkCode}/manage/clients/${match.id}/overview)`;
            }

            report += `**${regNum}** — ${brand} — ${type} — ${status} — ${lastSeen}${deviceName}${connection}${link}\n`;
        });
    }

    // === Store Printers (USB filtered) ===
    const filteredPrinters = (printers || []).filter(p =>
        (p.connection_type_name || '').toLowerCase() !== 'usb'
    );

    if (filteredPrinters.length > 0) {
        report += `\n**🖨️ Store Printers (${filteredPrinters.length})**\n`;

        filteredPrinters.forEach(printer => {
            const name = (printer.printer_name || 'Unknown').trim();
            const model = printer.printer_model_name || 'N/A';

            const match = merakiClients.find(c =>
                c?.description &&
                (c.description.trim().toLowerCase() === name.toLowerCase() ||
                    c.description.includes(name))
            );

            const status = match
                ? (match.status === 'Online' ? '✅ Online' : '❌ Offline')
                : '❓ Unknown';

            const lastSeen = match ? formatLastSeen(match.lastSeen) : '';
            const deviceName = match?.recentDeviceName ? ` via ${match.recentDeviceName}` : '';
            const connection = match?.recentDeviceConnection ? ` (${match.recentDeviceConnection})` : '';

            let link = '';
            if (match && merakiNetwork?.url) {
                const networkCode = merakiNetwork.url.split('/n/')[1]?.split('/')[0] || merakiNetwork.id;
                link = ` → [Meraki Client](https://n976.dashboard.meraki.com/${merakiNetwork.name.replace(/ /g, '-')}/n/${networkCode}/manage/clients/${match.id}/overview)`;
            }

            report += `**${name}** — ${model} — ${status} — ${lastSeen}${deviceName}${connection}${link}\n`;
        });
    }

    if (paymentTerminals && paymentTerminals.length > 0) {
        report += `\n**💳 Payment Terminals (${paymentTerminals.length})**\n`;

        paymentTerminals.forEach(term => {
            const deviceName = term.device_name || 'Unknown Terminal';
            const adyenName = term.adyen_device_name || 'N/A';
            const model = term.device_model_name || 'N/A';
            const type = term.device_type_name || 'N/A';

            const match = merakiClients.find(c =>
                c?.description &&
                (c.description.includes(deviceName) ||
                    c.description.includes(adyenName) ||
                    (term.ip_address && c.description.includes(term.ip_address.split('.')[0])))
            );

            const status = match
                ? (match.status === 'Online' ? '✅ Online' : '❌ Offline')
                : '❓ Unknown';

            const lastSeen = match ? formatLastSeen(match.lastSeen) : '';
            const recentDevice = match?.recentDeviceName ? ` via ${match.recentDeviceName}` : '';
            const connection = match?.recentDeviceConnection ? ` (${match.recentDeviceConnection})` : '';

            let link = '';
            if (match && merakiNetwork?.url) {
                const networkCode = merakiNetwork.url.split('/n/')[1]?.split('/')[0] || merakiNetwork.id;
                link = ` → [Meraki Client](https://n976.dashboard.meraki.com/${merakiNetwork.name.replace(/ /g, '-')}/n/${networkCode}/manage/clients/${match.id}/overview)`;
            }

            report += `**${deviceName}** — ${adyenName} — ${model} — ${type} — ${status} — ${lastSeen}${recentDevice}${connection}${link}\n`;
        });
    }

    if (mdmDevices && mdmDevices.length > 0) {
        const servers = mdmDevices.filter(d => (d.UserName || d.DeviceFriendlyName || '').includes('SRV'));
        const mobileRegs = mdmDevices.filter(d => (d.UserName || d.DeviceFriendlyName || '').includes('MR'));
        const custDisplays = mdmDevices.filter(d => (d.UserName || d.DeviceFriendlyName || '').includes('CD'));
        const iphones = mdmDevices.filter(d => (d.UserName || d.DeviceFriendlyName || '').includes('IPH'));

        // === Store Servers ===
        if (servers.length > 0) {
            report += `\n**🖥️ Store Servers (${servers.length})**\n`;

            servers.forEach(dev => {
                const name = dev.UserName || dev.DeviceFriendlyName || 'Unknown Server';
                const match = merakiClients.find(c =>
                    c?.description &&
                    (c.description.includes(name) || (dev.UserName && c.description.includes(dev.UserName)))
                );

                const status = match ? (match.status === 'Online' ? '✅ Online' : '❌ Offline') : '❓ Unknown';
                const lastSeen = match ? formatLastSeen(match.lastSeen) : '';
                const recentDevice = match?.recentDeviceName ? ` via ${match.recentDeviceName}` : '';
                const connection = match?.recentDeviceConnection ? ` (${match.recentDeviceConnection})` : '';

                let link = '';
                if (match && merakiNetwork?.url) {
                    const networkCode = merakiNetwork.url.split('/n/')[1]?.split('/')[0] || merakiNetwork.id;
                    link = ` → [Meraki Client](https://n976.dashboard.meraki.com/${merakiNetwork.name.replace(/ /g, '-')}/n/${networkCode}/manage/clients/${match.id}/overview)`;
                }

                report += `**${name}** — ${status} — ${lastSeen}${recentDevice}${connection}${link}\n`;
            });
        }

        // === Mobile Registers ===
        if (mobileRegs.length > 0) {
            report += `\n**📱 Mobile Registers (${mobileRegs.length})**\n`;

            mobileRegs.forEach(dev => {
                const name = dev.UserName || dev.DeviceFriendlyName || 'Unknown Mobile Register';
                const match = merakiClients.find(c =>
                    c?.description &&
                    (c.description.includes(name) || (dev.UserName && c.description.includes(dev.UserName)))
                );

                const status = match ? (match.status === 'Online' ? '✅ Online' : '❌ Offline') : '❓ Unknown';
                const lastSeen = match ? formatLastSeen(match.lastSeen) : '';
                const recentDevice = match?.recentDeviceName ? ` via ${match.recentDeviceName}` : '';
                const connection = match?.recentDeviceConnection ? ` (${match.recentDeviceConnection})` : '';

                let link = '';
                if (match && merakiNetwork?.url) {
                    const networkCode = merakiNetwork.url.split('/n/')[1]?.split('/')[0] || merakiNetwork.id;
                    link = ` → [Meraki Client](https://n976.dashboard.meraki.com/${merakiNetwork.name.replace(/ /g, '-')}/n/${networkCode}/manage/clients/${match.id}/overview)`;
                }

                report += `**${name}** — ${status} — ${lastSeen}${recentDevice}${connection}${link}\n`;
            });
        }

        // === Customer Displays ===
        if (custDisplays.length > 0) {
            report += `\n**🖥️ Customer Displays (${custDisplays.length})**\n`;

            custDisplays.forEach(dev => {
                const name = dev.UserName || dev.DeviceFriendlyName || 'Unknown Display';
                const match = merakiClients.find(c =>
                    c?.description &&
                    (c.description.includes(name) || (dev.UserName && c.description.includes(dev.UserName)))
                );

                const status = match ? (match.status === 'Online' ? '✅ Online' : '❌ Offline') : '❓ Unknown';
                const lastSeen = match ? formatLastSeen(match.lastSeen) : '';
                const recentDevice = match?.recentDeviceName ? ` via ${match.recentDeviceName}` : '';
                const connection = match?.recentDeviceConnection ? ` (${match.recentDeviceConnection})` : '';

                let link = '';
                if (match && merakiNetwork?.url) {
                    const networkCode = merakiNetwork.url.split('/n/')[1]?.split('/')[0] || merakiNetwork.id;
                    link = ` → [Meraki Client](https://n976.dashboard.meraki.com/${merakiNetwork.name.replace(/ /g, '-')}/n/${networkCode}/manage/clients/${match.id}/overview)`;
                }

                report += `**${name}** — ${status} — ${lastSeen}${recentDevice}${connection}${link}\n`;
            });
        }

        // === Store iPhones ===
        if (iphones.length > 0) {
            report += `\n**📱 Store iPhones (${iphones.length})**\n`;

            iphones.forEach(dev => {
                const name = dev.UserName || dev.DeviceFriendlyName || 'Unknown iPhone';
                const match = merakiClients.find(c =>
                    c?.description &&
                    (c.description.includes(name) || (dev.UserName && c.description.includes(dev.UserName)))
                );

                const status = match ? (match.status === 'Online' ? '✅ Online' : '❌ Offline') : '❓ Unknown';
                const lastSeen = match ? formatLastSeen(match.lastSeen) : '';
                const recentDevice = match?.recentDeviceName ? ` via ${match.recentDeviceName}` : '';
                const connection = match?.recentDeviceConnection ? ` (${match.recentDeviceConnection})` : '';

                let link = '';
                if (match && merakiNetwork?.url) {
                    const networkCode = merakiNetwork.url.split('/n/')[1]?.split('/')[0] || merakiNetwork.id;
                    link = ` → [Meraki Client](https://n976.dashboard.meraki.com/${merakiNetwork.name.replace(/ /g, '-')}/n/${networkCode}/manage/clients/${match.id}/overview)`;
                }

                report += `**${name}** — ${status} — ${lastSeen}${recentDevice}${connection}${link}\n`;
            });
        }
    }

    return report;
}

module.exports = { getStoreDetail };