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



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

function buildOwnedConversationWhere(currentUser) {
    if (!currentUser || !currentUser.id) {
        return {};
    }

    return {
        userId: currentUser.id,
    };
}

function mergeWhere(left, right) {
    const hasLeft = left && Object.keys(left).length;
    const hasRight = right && Object.keys(right).length;

    if (!hasLeft) {
        return right || {};
    }

    if (!hasRight) {
        return left || {};
    }

    return {
        [Op.and]: [left, right],
    };
}

module.exports = class MessagesDBApi {
    

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

        const messages = await db.messages.create(
            {
                id: data.id || undefined,
        
        role: data.role
        ||
        null
            ,
            
        content: data.content
        ||
        null
            ,
            
        content_markdown: data.content_markdown
        ||
        null
            ,
            
        tool_name: data.tool_name
        ||
        null
            ,
            
        tool_call_json: data.tool_call_json
        ||
        null
            ,
            
        tool_result_json: data.tool_result_json
        ||
        null
            ,
            
        delivery_status: data.delivery_status
        ||
        null
            ,
            
        sent_at: data.sent_at
        ||
        null
            ,
            
        completed_at: data.completed_at
        ||
        null
            ,
            
        sequence: data.sequence
        ||
        null
            ,
            
            importHash: data.importHash || null,
            createdById: currentUser.id,
            updatedById: currentUser.id,
    },
        { transaction },
    );

        
        await messages.setConversation( data.conversation || null, {
            transaction,
        });
        
        await messages.setAuthor_user( data.author_user || null, {
            transaction,
        });
        

        

        

        return messages;
    }
    

    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 messagesData = data.map((item, index) => ({
                id: item.id || undefined,
                
                role: item.role
            ||
            null
            ,
            
                content: item.content
            ||
            null
            ,
            
                content_markdown: item.content_markdown
            ||
            null
            ,
            
                tool_name: item.tool_name
            ||
            null
            ,
            
                tool_call_json: item.tool_call_json
            ||
            null
            ,
            
                tool_result_json: item.tool_result_json
            ||
            null
            ,
            
                delivery_status: item.delivery_status
            ||
            null
            ,
            
                sent_at: item.sent_at
            ||
            null
            ,
            
                completed_at: item.completed_at
            ||
            null
            ,
            
                sequence: item.sequence
            ||
            null
            ,
            
            importHash: item.importHash || null,
            createdById: currentUser.id,
            updatedById: currentUser.id,
            createdAt: new Date(Date.now() + index * 1000),
    }));

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

        // For each item created, replace relation files
        

        return messages;
    }

    static async update(id, data,  options) {
        const currentUser = (options && options.currentUser) || {id: null};
        const transaction = (options && options.transaction) || undefined;
        
        const messages = await db.messages.findOne({
            where: {
                id,
            },
            include: [
                {
                    model: db.conversations,
                    as: 'conversation',
                    where: buildOwnedConversationWhere(currentUser),
                    required: true,
                },
            ],
            transaction,
        });

        if (!messages) {
            throw new Error('Message not found.');
        }


        

        const updatePayload = {};
        
        if (data.role !== undefined) updatePayload.role = data.role;
        
        
        if (data.content !== undefined) updatePayload.content = data.content;
        
        
        if (data.content_markdown !== undefined) updatePayload.content_markdown = data.content_markdown;
        
        
        if (data.tool_name !== undefined) updatePayload.tool_name = data.tool_name;
        
        
        if (data.tool_call_json !== undefined) updatePayload.tool_call_json = data.tool_call_json;
        
        
        if (data.tool_result_json !== undefined) updatePayload.tool_result_json = data.tool_result_json;
        
        
        if (data.delivery_status !== undefined) updatePayload.delivery_status = data.delivery_status;
        
        
        if (data.sent_at !== undefined) updatePayload.sent_at = data.sent_at;
        
        
        if (data.completed_at !== undefined) updatePayload.completed_at = data.completed_at;
        
        
        if (data.sequence !== undefined) updatePayload.sequence = data.sequence;
        
        
        updatePayload.updatedById = currentUser.id;

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

        
        
        if (data.conversation !== undefined) {
            await messages.setConversation(
              
              data.conversation,
              
              { transaction }
            );
        }
        
        if (data.author_user !== undefined) {
            await messages.setAuthor_user(
              
              data.author_user,
              
              { transaction }
            );
        }
        

        
        

        

        return messages;
    }

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

        const messages = await db.messages.findAll({
            where: {
                id: {
                    [Op.in]: ids,
                },
            },
            include: [
                {
                    model: db.conversations,
                    as: 'conversation',
                    where: buildOwnedConversationWhere(currentUser),
                    required: true,
                },
            ],
            transaction,
        });

        if (messages.length !== ids.length) {
            throw new Error('One or more messages were not found.');
        }

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


        return messages;
    }

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

        const messages = await db.messages.findOne({
            where: {
                id,
            },
            include: [
                {
                    model: db.conversations,
                    as: 'conversation',
                    where: buildOwnedConversationWhere(currentUser),
                    required: true,
                },
            ],
            transaction,
        });

        if (!messages) {
            throw new Error('Message not found.');
        }

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

        await messages.destroy({
            transaction
        });

        return messages;
    }

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

        const messages = await db.messages.findOne(
            {
                where,
                include: [
                    {
                        model: db.conversations,
                        as: 'conversation',
                        where: buildOwnedConversationWhere(currentUser),
                        required: true,
                    },
                ],
                transaction,
            },
        );

        if (!messages) {
            return messages;
        }

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

        
        
        
        
        
        
        
        output.attachments_message = await messages.getAttachments_message({
            transaction
        });
        
        
        output.usage_events_message = await messages.getUsage_events_message({
            transaction
        });
        
        
        
        output.conversation = await messages.getConversation({
            transaction
        });
        
        
        output.author_user = await messages.getAuthor_user({
            transaction
        });
        
        

        return output;
    }

    static async findAll(
          filter,
           options
        ) {
        const currentUser = (options && options.currentUser) || { id: null };
        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.conversations,
        as: 'conversation',
        
        where: mergeWhere(
          filter.conversation ? {
            [Op.or]: [
              { id: { [Op.in]: filter.conversation.split('|').map(term => Utils.uuid(term)) } },
              {
                title: {
                  [Op.or]: filter.conversation.split('|').map(term => ({ [Op.iLike]: `%${term}%` }))
                }
              },
            ]
          } : {},
          buildOwnedConversationWhere(currentUser),
        ),
        required: true,
        
      },

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



    ];

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

            
            if (filter.content) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'messages',
                        'content',
                        filter.content,
                    ),
                };
            }
            
            if (filter.content_markdown) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'messages',
                        'content_markdown',
                        filter.content_markdown,
                    ),
                };
            }
            
            if (filter.tool_name) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'messages',
                        'tool_name',
                        filter.tool_name,
                    ),
                };
            }
            
            if (filter.tool_call_json) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'messages',
                        'tool_call_json',
                        filter.tool_call_json,
                    ),
                };
            }
            
            if (filter.tool_result_json) {
                where = {
                    ...where,
                    [Op.and]: Utils.ilike(
                        'messages',
                        'tool_result_json',
                        filter.tool_result_json,
                    ),
                };
            }
            

            
            

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

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

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

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

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

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

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

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

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


      

      



            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.messages.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, options) {
        const currentUser = (options && options.currentUser) || { id: null };
        let where = {};
        
        

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

        const records = await db.messages.findAll({
            attributes: [ 'id', 'content' ],
            where,
            include: [
                {
                    model: db.conversations,
                    as: 'conversation',
                    where: buildOwnedConversationWhere(currentUser),
                    required: true,
                    attributes: [],
                },
            ],
            limit: limit ? Number(limit) : undefined,
            offset: offset ? Number(offset) : undefined,
            orderBy: [['content', 'ASC']],
        });

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

    
};