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



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

module.exports = class Student_coursesDBApi {
    

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

        const student_courses = await db.student_courses.create(
            {
                id: data.id || undefined,
        
        custom_title: data.custom_title
        ||
        null
            ,
            
        custom_code: data.custom_code
        ||
        null
            ,
            
        semester: data.semester
        ||
        null
            ,
            
        difficulty: data.difficulty
        ||
        null
            ,
            
        target_grade: data.target_grade
        ||
        null
            ,
            
        credit_hours: data.credit_hours
        ||
        null
            ,
            
        instructor_name: data.instructor_name
        ||
        null
            ,
            
        meeting_location: data.meeting_location
        ||
        null
            ,
            
        meeting_pattern: data.meeting_pattern
        ||
        null
            ,
            
        start_on: data.start_on
        ||
        null
            ,
            
        end_on: data.end_on
        ||
        null
            ,
            
        is_archived: data.is_archived
        ||
        false
        
            ,
            
            importHash: data.importHash || null,
            createdById: currentUser.id,
            updatedById: currentUser.id,
    },
        { transaction },
    );

        
        await student_courses.setStudent( data.student || null, {
            transaction,
        });
        
        await student_courses.setCatalog_course( data.catalog_course || null, {
            transaction,
        });
        

        

        

        return student_courses;
    }
    

    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 student_coursesData = data.map((item, index) => ({
                id: item.id || undefined,
                
                custom_title: item.custom_title
            ||
            null
            ,
            
                custom_code: item.custom_code
            ||
            null
            ,
            
                semester: item.semester
            ||
            null
            ,
            
                difficulty: item.difficulty
            ||
            null
            ,
            
                target_grade: item.target_grade
            ||
            null
            ,
            
                credit_hours: item.credit_hours
            ||
            null
            ,
            
                instructor_name: item.instructor_name
            ||
            null
            ,
            
                meeting_location: item.meeting_location
            ||
            null
            ,
            
                meeting_pattern: item.meeting_pattern
            ||
            null
            ,
            
                start_on: item.start_on
            ||
            null
            ,
            
                end_on: item.end_on
            ||
            null
            ,
            
                is_archived: item.is_archived
            ||
            false
        
            ,
            
            importHash: item.importHash || null,
            createdById: currentUser.id,
            updatedById: currentUser.id,
            createdAt: new Date(Date.now() + index * 1000),
    }));

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

        // For each item created, replace relation files
        

        return student_courses;
    }

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

        const student_courses = await db.student_courses.findByPk(id, {}, {transaction});


        

        const updatePayload = {};
        
        if (data.custom_title !== undefined) updatePayload.custom_title = data.custom_title;
        
        
        if (data.custom_code !== undefined) updatePayload.custom_code = data.custom_code;
        
        
        if (data.semester !== undefined) updatePayload.semester = data.semester;
        
        
        if (data.difficulty !== undefined) updatePayload.difficulty = data.difficulty;
        
        
        if (data.target_grade !== undefined) updatePayload.target_grade = data.target_grade;
        
        
        if (data.credit_hours !== undefined) updatePayload.credit_hours = data.credit_hours;
        
        
        if (data.instructor_name !== undefined) updatePayload.instructor_name = data.instructor_name;
        
        
        if (data.meeting_location !== undefined) updatePayload.meeting_location = data.meeting_location;
        
        
        if (data.meeting_pattern !== undefined) updatePayload.meeting_pattern = data.meeting_pattern;
        
        
        if (data.start_on !== undefined) updatePayload.start_on = data.start_on;
        
        
        if (data.end_on !== undefined) updatePayload.end_on = data.end_on;
        
        
        if (data.is_archived !== undefined) updatePayload.is_archived = data.is_archived;
        
        
        updatePayload.updatedById = currentUser.id;

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

        
        
        if (data.student !== undefined) {
            await student_courses.setStudent(
              
              data.student,
              
              { transaction }
            );
        }
        
        if (data.catalog_course !== undefined) {
            await student_courses.setCatalog_course(
              
              data.catalog_course,
              
              { transaction }
            );
        }
        

        
        

        

        return student_courses;
    }

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

        const student_courses = await db.student_courses.findAll({
            where: {
                id: {
                    [Op.in]: ids,
                },
            },
            transaction,
        });

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


        return student_courses;
    }

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

        const student_courses = await db.student_courses.findByPk(id, options);

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

        await student_courses.destroy({
            transaction
        });

        return student_courses;
    }

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

        const student_courses = await db.student_courses.findOne(
            { where },
            { transaction },
        );

        if (!student_courses) {
            return student_courses;
        }

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

        
        
        
        
        
        
        output.modules_student_course = await student_courses.getModules_student_course({
            transaction
        });
        
        
        
        
        output.tasks_student_course = await student_courses.getTasks_student_course({
            transaction
        });
        
        
        output.grade_items_student_course = await student_courses.getGrade_items_student_course({
            transaction
        });
        
        
        output.study_sessions_student_course = await student_courses.getStudy_sessions_student_course({
            transaction
        });
        
        
        output.chat_threads_student_course = await student_courses.getChat_threads_student_course({
            transaction
        });
        
        
        
        
        
        
        
        
        output.student = await student_courses.getStudent({
            transaction
        });
        
        
        output.catalog_course = await student_courses.getCatalog_course({
            transaction
        });
        
        

        return output;
    }

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

        

        

        offset = currentPage * limit;

        const orderBy = null;

    const transaction = (options && options.transaction) || undefined;

    let include = [

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

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



    ];

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

            
            if (filter.custom_title) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'student_courses',
                        'custom_title',
                        filter.custom_title,
                    ),
                };
            }
            
            if (filter.custom_code) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'student_courses',
                        'custom_code',
                        filter.custom_code,
                    ),
                };
            }
            
            if (filter.semester) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'student_courses',
                        'semester',
                        filter.semester,
                    ),
                };
            }
            
            if (filter.instructor_name) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'student_courses',
                        'instructor_name',
                        filter.instructor_name,
                    ),
                };
            }
            
            if (filter.meeting_location) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'student_courses',
                        'meeting_location',
                        filter.meeting_location,
                    ),
                };
            }
            
            if (filter.meeting_pattern) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'student_courses',
                        'meeting_pattern',
                        filter.meeting_pattern,
                    ),
                };
            }
            

            
            

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

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

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

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

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

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

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

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

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

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

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


      

      



            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,
                        },
                    };
                }
            }
        }
        

        

        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.student_courses.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, ) {
        let where = {};
        
        

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

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

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

    
};