const db = require('../models');
const Utils = require('../utils');
const config = require('../../config');
const crypto = require('crypto');


const Sequelize = db.Sequelize;
const Op = Sequelize.Op;

function isCustomerUser(currentUser) {
    return currentUser?.app_role?.name === config.roles.customer;
}

function canManageInternalBookingRequestFields(currentUser) {
    return Boolean(currentUser?.app_role?.globalAccess);
}

function generateRequestCode() {
    const dateSegment = new Date().toISOString().slice(0, 10).replace(/-/g, '');
    const randomSegment = crypto.randomBytes(2).toString('hex').toUpperCase();

    return `BR-${dateSegment}-${randomSegment}`;
}

function resolveRequestCode(data, currentUser) {
    if (canManageInternalBookingRequestFields(currentUser) && data.request_code) {
        return data.request_code;
    }

    return generateRequestCode();
}

function resolveStatusForCreate(data, currentUser) {
    if (canManageInternalBookingRequestFields(currentUser)) {
        return data.status || 'draft';
    }

    return 'submitted';
}

function resolveOrganizationId(data, currentUser) {
    if (canManageInternalBookingRequestFields(currentUser)) {
        return data.organization || currentUser.organization?.id || null;
    }

    return currentUser.organization?.id || null;
}

function resolveRequestedById(data, currentUser) {
    if (canManageInternalBookingRequestFields(currentUser)) {
        return data.requested_by || currentUser.id || null;
    }

    return currentUser.id || null;
}

function mergeWhereWithScope(where, scope) {
    if (!scope) {
        return where;
    }

    return {
        [Op.and]: [where, scope],
    };
}

module.exports = class Booking_requestsDBApi {
    

    
    static async create(data, options) {
        const currentUser = (options && options.currentUser) || { id: null };
        const transaction = (options && options.transaction) || undefined;

        const booking_requests = await db.booking_requests.create(
            {
                id: data.id || undefined,
        
        request_code: resolveRequestCode(data, currentUser),
            
        status: resolveStatusForCreate(data, currentUser),
            
        check_in_at: data.check_in_at
        ||
        null
            ,
            
        check_out_at: data.check_out_at
        ||
        null
            ,
            
        preferred_bedrooms: data.preferred_bedrooms
        ||
        null
            ,
            
        guest_count: data.guest_count
        ||
        null
            ,
            
        purpose_of_stay: data.purpose_of_stay
        ||
        null
            ,
            
        special_requirements: data.special_requirements
        ||
        null
            ,
            
        budget_code: data.budget_code
        ||
        null
            ,
            
        max_budget_amount: data.max_budget_amount
        ||
        null
            ,
            
        currency: data.currency
        ||
        null
            ,
            
            importHash: data.importHash || null,
            createdById: currentUser.id,
            updatedById: currentUser.id,
    },
        { transaction },
    );

        
        await booking_requests.setTenant( canManageInternalBookingRequestFields(currentUser) ? data.tenant || null : null, {
            transaction,
        });
        
        await booking_requests.setOrganization(resolveOrganizationId(data, currentUser), {
            transaction,
        });
        
        await booking_requests.setRequested_by(resolveRequestedById(data, currentUser), {
            transaction,
        });
        
        await booking_requests.setPreferred_property( data.preferred_property || null, {
            transaction,
        });
        
        await booking_requests.setPreferred_unit_type( data.preferred_unit_type || null, {
            transaction,
        });
        

        
        await booking_requests.setTravelers(data.travelers || [], {
            transaction,
        });
        
        await booking_requests.setApproval_steps(data.approval_steps || [], {
            transaction,
        });
        
        await booking_requests.setDocuments(data.documents || [], {
            transaction,
        });
        
        await booking_requests.setComments(data.comments || [], {
            transaction,
        });
        

        

        return booking_requests;
    }
    

    static async bulkImport(data, options) {
        const currentUser = (options && options.currentUser) || { id: null };
        const transaction = (options && options.transaction) || undefined;

        // Prepare data - wrapping individual data transformations in a map() method
        const booking_requestsData = data.map((item, index) => ({
                id: item.id || undefined,
                
                request_code: item.request_code
            ||
            null
            ,
            
                status: item.status
            ||
            null
            ,
            
                check_in_at: item.check_in_at
            ||
            null
            ,
            
                check_out_at: item.check_out_at
            ||
            null
            ,
            
                preferred_bedrooms: item.preferred_bedrooms
            ||
            null
            ,
            
                guest_count: item.guest_count
            ||
            null
            ,
            
                purpose_of_stay: item.purpose_of_stay
            ||
            null
            ,
            
                special_requirements: item.special_requirements
            ||
            null
            ,
            
                budget_code: item.budget_code
            ||
            null
            ,
            
                max_budget_amount: item.max_budget_amount
            ||
            null
            ,
            
                currency: item.currency
            ||
            null
            ,
            
            importHash: item.importHash || null,
            createdById: currentUser.id,
            updatedById: currentUser.id,
            createdAt: new Date(Date.now() + index * 1000),
    }));

        // Bulk create items
        const booking_requests = await db.booking_requests.bulkCreate(booking_requestsData, { transaction });

        // For each item created, replace relation files
        

        return booking_requests;
    }

    static async update(id, data,  options) {
        const currentUser = (options && options.currentUser) || {id: null};
        const transaction = (options && options.transaction) || undefined;
        const globalAccess = currentUser.app_role?.globalAccess;
        const canManageInternalFields = canManageInternalBookingRequestFields(currentUser);

        const booking_requests = await db.booking_requests.findOne({
            where: mergeWhereWithScope({ id }, isCustomerUser(currentUser) ? { requested_byId: currentUser.id } : null),
            transaction,
        });


        

        const updatePayload = {};
        
        if (data.request_code !== undefined && canManageInternalFields) updatePayload.request_code = data.request_code;
        
        
        if (data.status !== undefined && canManageInternalFields) updatePayload.status = data.status;
        
        
        if (data.check_in_at !== undefined) updatePayload.check_in_at = data.check_in_at;
        
        
        if (data.check_out_at !== undefined) updatePayload.check_out_at = data.check_out_at;
        
        
        if (data.preferred_bedrooms !== undefined) updatePayload.preferred_bedrooms = data.preferred_bedrooms;
        
        
        if (data.guest_count !== undefined) updatePayload.guest_count = data.guest_count;
        
        
        if (data.purpose_of_stay !== undefined) updatePayload.purpose_of_stay = data.purpose_of_stay;
        
        
        if (data.special_requirements !== undefined) updatePayload.special_requirements = data.special_requirements;
        
        
        if (data.budget_code !== undefined) updatePayload.budget_code = data.budget_code;
        
        
        if (data.max_budget_amount !== undefined) updatePayload.max_budget_amount = data.max_budget_amount;
        
        
        if (data.currency !== undefined) updatePayload.currency = data.currency;
        
        
        updatePayload.updatedById = currentUser.id;

        await booking_requests.update(updatePayload, {transaction});

        
        
        if (data.tenant !== undefined && canManageInternalFields) {
            await booking_requests.setTenant(
              
              data.tenant,
              
              { transaction }
            );
        }
        
        if (data.organization !== undefined) {
            await booking_requests.setOrganization(
              
              (globalAccess ? data.organization : currentUser.organization.id),
              
              { transaction }
            );
        }
        
        if (data.requested_by !== undefined && canManageInternalFields) {
            await booking_requests.setRequested_by(
              
              data.requested_by,
              
              { transaction }
            );
        }
        
        if (data.preferred_property !== undefined) {
            await booking_requests.setPreferred_property(
              
              data.preferred_property,
              
              { transaction }
            );
        }
        
        if (data.preferred_unit_type !== undefined) {
            await booking_requests.setPreferred_unit_type(
              
              data.preferred_unit_type,
              
              { transaction }
            );
        }
        

        
        
        if (data.travelers !== undefined) {
            await booking_requests.setTravelers(data.travelers, { transaction });
        }
        
        if (data.approval_steps !== undefined) {
            await booking_requests.setApproval_steps(data.approval_steps, { transaction });
        }
        
        if (data.documents !== undefined) {
            await booking_requests.setDocuments(data.documents, { transaction });
        }
        
        if (data.comments !== undefined) {
            await booking_requests.setComments(data.comments, { transaction });
        }
        

        

        return booking_requests;
    }

    static async deleteByIds(ids, options) {
        const currentUser = (options && options.currentUser) || { id: null };
        const transaction = (options && options.transaction) || undefined;

        const booking_requests = await db.booking_requests.findAll({
            where: mergeWhereWithScope({
                id: {
                    [Op.in]: ids,
                },
            }, isCustomerUser(currentUser) ? { requested_byId: currentUser.id } : null),
            transaction,
        });

        await db.sequelize.transaction(async (transaction) => {
            for (const record of booking_requests) {
                await record.update(
                    {deletedBy: currentUser.id},
                    {transaction}
                );
            }
            for (const record of booking_requests) {
                await record.destroy({transaction});
            }
        });


        return booking_requests;
    }

    static async remove(id, options) {
        const currentUser = (options && options.currentUser) || {id: null};
        const transaction = (options && options.transaction) || undefined;

        const booking_requests = await db.booking_requests.findOne({
            where: mergeWhereWithScope({ id }, isCustomerUser(currentUser) ? { requested_byId: currentUser.id } : null),
            transaction,
        });

        if (!booking_requests) {
            return null;
        }

        await booking_requests.update({
            deletedBy: currentUser.id
        }, {
            transaction,
        });

        await booking_requests.destroy({
            transaction
        });

        return booking_requests;
    }

    static async findBy(where, options) {
        const transaction = (options && options.transaction) || undefined;
        const currentUser = (options && options.currentUser) || null;

        const booking_requests = await db.booking_requests.findOne({
            where: mergeWhereWithScope(where, isCustomerUser(currentUser) ? { requested_byId: currentUser.id } : null),
            transaction,
        });

        if (!booking_requests) {
            return booking_requests;
        }

        const output = booking_requests.get({plain: true});

        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        output.booking_request_travelers_booking_request = await booking_requests.getBooking_request_travelers_booking_request({
            transaction
        });
        
        
        output.approval_steps_booking_request = await booking_requests.getApproval_steps_booking_request({
            transaction
        });
        
        
        output.reservations_booking_request = await booking_requests.getReservations_booking_request({
            transaction
        });
        
        
        
        
        
        
        
        output.documents_booking_request = await booking_requests.getDocuments_booking_request({
            transaction
        });
        
        
        
        
        output.activity_comments_booking_request = await booking_requests.getActivity_comments_booking_request({
            transaction
        });
        
        
        
        
        
        
        output.tenant = await booking_requests.getTenant({
            transaction
        });
        
        
        output.organization = await booking_requests.getOrganization({
            transaction
        });
        
        
        output.requested_by = await booking_requests.getRequested_by({
            transaction
        });
        
        
        output.preferred_property = await booking_requests.getPreferred_property({
            transaction
        });
        
        
        output.preferred_unit_type = await booking_requests.getPreferred_unit_type({
            transaction
        });
        
        
        output.travelers = await booking_requests.getTravelers({
            transaction
        });
        
        
        output.approval_steps = await booking_requests.getApproval_steps({
            transaction
        });
        
        
        output.documents = await booking_requests.getDocuments({
            transaction
        });
        
        
        output.comments = await booking_requests.getComments({
            transaction
        });
        
        

        return output;
    }

    static async findAll(
          filter,
           globalAccess,  options
        ) {
        const limit = filter.limit || 0;
        let offset = 0;
        let where = {};
        const currentPage = +filter.page;

        
        const user = (options && options.currentUser) || null;
        const userOrganizations = (user && user.organizations?.id) || null;
        const customerScope = isCustomerUser(user) ? { requested_byId: user.id } : null;
        

        
        if (userOrganizations) {
            if (options?.currentUser?.organizationsId) {
                where.organizationId = options.currentUser.organizationsId;
            }
        }
        

        if (customerScope) {
            where.requested_byId = user.id;
        }

        offset = currentPage * limit;


    let include = [

      {
        model: db.tenants,
        as: 'tenant',
        
        where: filter.tenant ? {
          [Op.or]: [
            { id: { [Op.in]: filter.tenant.split('|').map(term => Utils.uuid(term)) } },
            {
              name: {
                [Op.or]: filter.tenant.split('|').map(term => ({ [Op.iLike]: `%${term}%` }))
              }
            },
          ]
        } : {},
        
      },

      {
        model: db.organizations,
        as: 'organization',
        
      },

      {
        model: db.users,
        as: 'requested_by',
        
        where: filter.requested_by ? {
          [Op.or]: [
            { id: { [Op.in]: filter.requested_by.split('|').map(term => Utils.uuid(term)) } },
            {
              firstName: {
                [Op.or]: filter.requested_by.split('|').map(term => ({ [Op.iLike]: `%${term}%` }))
              }
            },
          ]
        } : {},
        
      },

      {
        model: db.properties,
        as: 'preferred_property',
        
        where: filter.preferred_property ? {
          [Op.or]: [
            { id: { [Op.in]: filter.preferred_property.split('|').map(term => Utils.uuid(term)) } },
            {
              name: {
                [Op.or]: filter.preferred_property.split('|').map(term => ({ [Op.iLike]: `%${term}%` }))
              }
            },
          ]
        } : {},
        
      },

      {
        model: db.unit_types,
        as: 'preferred_unit_type',
        
        where: filter.preferred_unit_type ? {
          [Op.or]: [
            { id: { [Op.in]: filter.preferred_unit_type.split('|').map(term => Utils.uuid(term)) } },
            {
              name: {
                [Op.or]: filter.preferred_unit_type.split('|').map(term => ({ [Op.iLike]: `%${term}%` }))
              }
            },
          ]
        } : {},
        
      },


      {
        model: db.booking_request_travelers,
        as: 'travelers',
        required: false,
      },

      {
        model: db.approval_steps,
        as: 'approval_steps',
        required: false,
      },

      {
        model: db.documents,
        as: 'documents',
        required: false,
      },

      {
        model: db.activity_comments,
        as: 'comments',
        required: false,
      },


    ];

        if (filter) {
            if (filter.id) {
                where = {
                    ...where,
                    ['id']: Utils.uuid(filter.id),
                };
            }

            
            if (filter.request_code) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'booking_requests',
                        'request_code',
                        filter.request_code,
                    ),
                };
            }
            
            if (filter.purpose_of_stay) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'booking_requests',
                        'purpose_of_stay',
                        filter.purpose_of_stay,
                    ),
                };
            }
            
            if (filter.special_requirements) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'booking_requests',
                        'special_requirements',
                        filter.special_requirements,
                    ),
                };
            }
            
            if (filter.budget_code) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'booking_requests',
                        'budget_code',
                        filter.budget_code,
                    ),
                };
            }
            
            if (filter.currency) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'booking_requests',
                        'currency',
                        filter.currency,
                    ),
                };
            }
            

            
            

            
            if (filter.check_in_atRange) {
                const [start, end] = filter.check_in_atRange;

                if (start !== undefined && start !== null && start !== '') {
                    where = {
                        ...where,
                    check_in_at: {
                    ...where.check_in_at,
                            [Op.gte]: start,
                    },
                };
                }

                if (end !== undefined && end !== null && end !== '') {
                    where = {
                        ...where,
                    check_in_at: {
                    ...where.check_in_at,
                            [Op.lte]: end,
                    },
                };
                }
            }
            
            if (filter.check_out_atRange) {
                const [start, end] = filter.check_out_atRange;

                if (start !== undefined && start !== null && start !== '') {
                    where = {
                        ...where,
                    check_out_at: {
                    ...where.check_out_at,
                            [Op.gte]: start,
                    },
                };
                }

                if (end !== undefined && end !== null && end !== '') {
                    where = {
                        ...where,
                    check_out_at: {
                    ...where.check_out_at,
                            [Op.lte]: end,
                    },
                };
                }
            }
            
            if (filter.preferred_bedroomsRange) {
                const [start, end] = filter.preferred_bedroomsRange;

                if (start !== undefined && start !== null && start !== '') {
                    where = {
                        ...where,
                    preferred_bedrooms: {
                    ...where.preferred_bedrooms,
                            [Op.gte]: start,
                    },
                };
                }

                if (end !== undefined && end !== null && end !== '') {
                    where = {
                        ...where,
                    preferred_bedrooms: {
                    ...where.preferred_bedrooms,
                            [Op.lte]: end,
                    },
                };
                }
            }
            
            if (filter.guest_countRange) {
                const [start, end] = filter.guest_countRange;

                if (start !== undefined && start !== null && start !== '') {
                    where = {
                        ...where,
                    guest_count: {
                    ...where.guest_count,
                            [Op.gte]: start,
                    },
                };
                }

                if (end !== undefined && end !== null && end !== '') {
                    where = {
                        ...where,
                    guest_count: {
                    ...where.guest_count,
                            [Op.lte]: end,
                    },
                };
                }
            }
            
            if (filter.max_budget_amountRange) {
                const [start, end] = filter.max_budget_amountRange;

                if (start !== undefined && start !== null && start !== '') {
                    where = {
                        ...where,
                    max_budget_amount: {
                    ...where.max_budget_amount,
                            [Op.gte]: start,
                    },
                };
                }

                if (end !== undefined && end !== null && end !== '') {
                    where = {
                        ...where,
                    max_budget_amount: {
                    ...where.max_budget_amount,
                            [Op.lte]: end,
                    },
                };
                }
            }
            

            if (filter.active !== undefined) {
                where = {
                    ...where,
                    active: filter.active === true || filter.active === 'true'
                };
            }

            
            if (filter.status) {
                where = {
                    ...where,
                status: filter.status,
            };
            }
            


      

      
      if (filter.organization) {
        const listItems = filter.organization.split('|').map(item => {
          return  Utils.uuid(item)
        });

        where = {
          ...where,
          organizationId: {[Op.or]: listItems}
        };
      }
      

      

      

      


      if (filter.travelers) {
        const searchTerms = filter.travelers.split('|');

        include = [
          {
            model: db.booking_request_travelers,
            as: 'travelers_filter',
            required: searchTerms.length > 0,
            where: searchTerms.length > 0 ? {
              [Op.or]: [
                { id: { [Op.in]: searchTerms.map(term => Utils.uuid(term)) } },
                { 
                  full_name: {
                    [Op.or]: searchTerms.map(term => ({ [Op.iLike]: `%${term}%` }))
                  }
                }
              ]
            } : undefined
          },
          ...include,
        ]
      }

      if (filter.approval_steps) {
        const searchTerms = filter.approval_steps.split('|');

        include = [
          {
            model: db.approval_steps,
            as: 'approval_steps_filter',
            required: searchTerms.length > 0,
            where: searchTerms.length > 0 ? {
              [Op.or]: [
                { id: { [Op.in]: searchTerms.map(term => Utils.uuid(term)) } },
                { 
                  decision_notes: {
                    [Op.or]: searchTerms.map(term => ({ [Op.iLike]: `%${term}%` }))
                  }
                }
              ]
            } : undefined
          },
          ...include,
        ]
      }

      if (filter.documents) {
        const searchTerms = filter.documents.split('|');

        include = [
          {
            model: db.documents,
            as: 'documents_filter',
            required: searchTerms.length > 0,
            where: searchTerms.length > 0 ? {
              [Op.or]: [
                { id: { [Op.in]: searchTerms.map(term => Utils.uuid(term)) } },
                { 
                  file_name: {
                    [Op.or]: searchTerms.map(term => ({ [Op.iLike]: `%${term}%` }))
                  }
                }
              ]
            } : undefined
          },
          ...include,
        ]
      }

      if (filter.comments) {
        const searchTerms = filter.comments.split('|');

        include = [
          {
            model: db.activity_comments,
            as: 'comments_filter',
            required: searchTerms.length > 0,
            where: searchTerms.length > 0 ? {
              [Op.or]: [
                { id: { [Op.in]: searchTerms.map(term => Utils.uuid(term)) } },
                { 
                  body: {
                    [Op.or]: searchTerms.map(term => ({ [Op.iLike]: `%${term}%` }))
                  }
                }
              ]
            } : undefined
          },
          ...include,
        ]
      }


            if (filter.createdAtRange) {
                const [start, end] = filter.createdAtRange;

                if (start !== undefined && start !== null && start !== '') {
                    where = {
                        ...where,
                        ['createdAt']: {
                            ...where.createdAt,
                            [Op.gte]: start,
                        },
                    };
                }

                if (end !== undefined && end !== null && end !== '') {
                    where = {
                        ...where,
                        ['createdAt']: {
                            ...where.createdAt,
                            [Op.lte]: end,
                        },
                    };
                }
            }
        }
        

        
        if (globalAccess) {
            delete where.organizationId;
        }
        

        const queryOptions = {
            where,
            include,
            distinct: true,
            order: filter.field && filter.sort
                ? [[filter.field, filter.sort]]
                : [['createdAt', 'desc']],
            transaction: options?.transaction,
            logging: console.log
        };

        if (!options?.countOnly) {
            queryOptions.limit = limit ? Number(limit) : undefined;
            queryOptions.offset = offset ? Number(offset) : undefined;
        }

        try {
            const { rows, count } = await db.booking_requests.findAndCountAll(queryOptions);

            return {
                rows: options?.countOnly ? [] : rows,
                count: count
            };
        } catch (error) {
            console.error('Error executing query:', error);
            throw error;
        }
    }

    static async findAllAutocomplete(query, limit, offset,  globalAccess, organizationId, currentUser) {
        let where = {};

        if (isCustomerUser(currentUser)) {
            where.requested_byId = currentUser.id;
        }
        
        
        if (!globalAccess && organizationId) {
            where.organizationId = organizationId;
        }
        

        if (query) {
            where = {
                [Op.and]: [
                    where,
                    {
                        [Op.or]: [
                            { ['id']: Utils.uuid(query) },
                            Utils.ilike(
                                'booking_requests',
                                'request_code',
                                query,
                            ),
                        ],
                    },
                ],
            };
        }

        const records = await db.booking_requests.findAll({
            attributes: [ 'id', 'request_code' ],
            where,
            limit: limit ? Number(limit) : undefined,
            offset: offset ? Number(offset) : undefined,
            orderBy: [['request_code', 'ASC']],
        });

        return records.map((record) => ({
            id: record.id,
            label: record.request_code,
        }));
    }

    
};