// src/models/ticketSnModel.js
const pool = require('../data/database');
const { logInfo, logError, logWarning } = require('../utils/logger'); 

class TicketSnModel {
  
    static async saveTicket(ticketData, typeTicket) {
        const query = `
            INSERT INTO tickets_sn 
            (ticket_number, short_description, status, description, caller_id, caller_email, 
            location_id, location_name, ramal, telefone, opened_at, tipo)
            VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12)
            ON CONFLICT (ticket_number) 
            DO UPDATE SET
                short_description = EXCLUDED.short_description,
                status = EXCLUDED.status,
                description = EXCLUDED.description,
                caller_id = EXCLUDED.caller_id,
                caller_email = EXCLUDED.caller_email,
                location_id = EXCLUDED.location_id,
                location_name = EXCLUDED.location_name,
                ramal = EXCLUDED.ramal,
                telefone = EXCLUDED.telefone,
                opened_at = EXCLUDED.opened_at,
                tipo = EXCLUDED.tipo,
                updated_at = NOW()
            RETURNING id, xmax = 0 as inserted`;

        const values = [ 
            ticketData.number?.value || null,                      // $1 - ticket_number
            ticketData.short_description?.value || null,           // $2 - short_description
            ticketData.state?.display_value || null,               // $3 - status
            ticketData.description?.value || null,                 // $4 - description
            ticketData.opened_by?.display_value || null,           // $5 - caller_id
            ticketData['opened_by.email']?.value || null,          // $6 - caller_email
            ticketData.location?.value || null,                    // $7 - location_id
            ticketData.location?.display_value || null,            // $8 - location_name
            ticketData['variables.numero_ramal']?.value || null,   // $9 - ramal
            ticketData['variables.telephone_favorecido_rh']?.value || null, // $10 - telefone
            ticketData.opened_at?.value ? new Date(ticketData.opened_at.value) : null, // $11 - opened_at
            typeTicket                                             // $12 - tipo
        ];
        
        try {
            const result = await pool.query(query, values);
            const wasInserted = result.rows[0].inserted; // true = INSERT, false = UPDATE
            
            if (wasInserted) {
                logInfo(`✅ NOVO ticket salvo! ID: ${result.rows[0].id}`, {
                    ticket_id: result.rows[0].id,
                    ticket_number: values[0],
                    action: 'insert'
                });
            } else {
                logInfo(`🔄 Ticket atualizado! ID: ${result.rows[0].id}`, {
                    ticket_id: result.rows[0].id,
                    ticket_number: values[0],
                    action: 'update'
                });
            }
            
            return result.rows[0].id;
        } catch (error) {
            logError(error, `❌ Erro ao salvar ticket ${values[0]}`);
            throw error; 
        }
    }

    // NOVO: Buscar tickets pendentes para sincronização com GLPI
    static async getPendingTickets(limit = 3) {
        try {
            const query = `
                SELECT 
                    id,
                    ticket_number,
                    short_description,
                    description,
                    status,
                    caller_id,
                    caller_email,
                    location_id,
                    location_name,
                    ramal,
                    telefone,
                    opened_at,
                    tipo,
                    created_at,
                    updated_at
                FROM tickets_sn 
                WHERE glpi_sync_status IS NULL 
                ORDER BY opened_at ASC 
                LIMIT $1
            `;
            
            const result = await pool.query(query, [limit]);
            logInfo(`📋 Tickets pendentes encontrados: ${result.rows.length}`);
            return result.rows;
            
        } catch (error) {
            logError(error, '❌ Erro ao buscar tickets pendentes');
            return [];
        }
    }

    // NOVO: Atualizar status de sincronização com GLPI
    static async updateSyncStatus(ticketId, status, glpiTicketId = null) {
        try {
            const query = `
                UPDATE tickets_sn 
                SET glpi_sync_status = $1, 
                    glpi_ticket_id = $2, 
                    glpi_sync_date = NOW()
                WHERE id = $3
                RETURNING id, ticket_number
            `;
            
            const result = await pool.query(query, [status, glpiTicketId, ticketId]);
            
            if (result.rows.length > 0) {
                logInfo(`🔄 Status atualizado: ${status} para ticket ${result.rows[0].ticket_number}`, {
                    ticket_id: result.rows[0].id,
                    ticket_number: result.rows[0].ticket_number,
                    glpi_ticket_id: glpiTicketId,
                    status: status
                });
            }
            
        } catch (error) {
            logError(error, `❌ Erro ao atualizar status de sync para ticket ${ticketId}`);
        }
    }

    // NOVO: Resetar status de sync para testes (opcional)
    static async resetSyncStatus() {
        try {
            const query = `
                UPDATE tickets_sn 
                SET glpi_sync_status = NULL, 
                    glpi_ticket_id = NULL,
                    glpi_sync_date = NULL
                WHERE id IN (
                    SELECT id FROM tickets_sn 
                    ORDER BY opened_at DESC 
                    LIMIT $1
                )
                RETURNING id, ticket_number
            `;
            
            const result = await pool.query(query, [limit]);
            logInfo(`🔄 Status resetado para ${result.rows.length} tickets`);
            return result.rows;
            
        } catch (error) {
            logError(error, '❌ Erro ao resetar status de sync');
            return [];
        }
    }

    // NOVO: Verificar status de sincronização
    static async getSyncStatus() {
        try {
            const query = `
                SELECT 
                    glpi_sync_status,
                    COUNT(*) as total,
                    COUNT(glpi_ticket_id) as synchronized
                FROM tickets_sn 
                GROUP BY glpi_sync_status
            `;
            
            const result = await pool.query(query);
            return result.rows;
            
        } catch (error) {
            logError(error, '❌ Erro ao verificar status de sync');
            return [];
        }
    }
}

module.exports = TicketSnModel;