const { APPLICATION_STAGES, APPLICATION_STATUS, BUSINESS_TYPES } = require('../config/constants');

module.exports = (sequelize, DataTypes) => {
    const Application = sequelize.define('Application', {
        id: {
            type: DataTypes.UUID,
            defaultValue: DataTypes.UUIDV4,
            primaryKey: true
        },
        applicationId: {
            type: DataTypes.STRING,
            unique: true,
            allowNull: false
        },
        applicantName: {
            type: DataTypes.STRING,
            allowNull: false
        },
        email: {
            type: DataTypes.STRING,
            allowNull: false,
            validate: { isEmail: true }
        },
        phone: {
            type: DataTypes.STRING,
            allowNull: false
        },
        businessType: {
            type: DataTypes.ENUM(Object.values(BUSINESS_TYPES)),
            allowNull: false
        },
        preferredLocation: {
            type: DataTypes.STRING,
            allowNull: false
        },
        city: {
            type: DataTypes.STRING,
            allowNull: false
        },
        state: {
            type: DataTypes.STRING,
            allowNull: false
        },
        experienceYears: {
            type: DataTypes.INTEGER,
            allowNull: false
        },
        investmentCapacity: {
            type: DataTypes.STRING,
            allowNull: false
        },
        currentStage: {
            type: DataTypes.ENUM(Object.values(APPLICATION_STAGES)),
            defaultValue: APPLICATION_STAGES.DD
        },
        overallStatus: {
            type: DataTypes.ENUM(Object.values(APPLICATION_STATUS)),
            defaultValue: APPLICATION_STATUS.PENDING
        },
        progressPercentage: {
            type: DataTypes.INTEGER,
            defaultValue: 0
        },
        submittedBy: {
            type: DataTypes.UUID,
            allowNull: true,
            references: {
                model: 'users',
                key: 'id'
            }
        },
        documents: {
            type: DataTypes.JSON,
            defaultValue: []
        },
        timeline: {
            type: DataTypes.JSON,
            defaultValue: []
        }
    }, {
        tableName: 'applications',
        timestamps: true,
        indexes: [
            { fields: ['applicationId'] },
            { fields: ['email'] },
            { fields: ['currentStage'] },
            { fields: ['overallStatus'] }
        ]
    });

    Application.associate = (models) => {
        Application.belongsTo(models.User, {
            foreignKey: 'submittedBy',
            as: 'submitter'
        });
        Application.hasMany(models.Document, {
            foreignKey: 'requestId',
            as: 'uploadedDocuments',
            scope: { requestType: 'application' }
        });
    };

    return Application;
};