import { ContainerModule, interfaces } from 'inversify';
import { ServiceIdentifiers } from '../../ServiceIdentifiers';

import { IIdentifierNamesGenerator } from '../../../interfaces/generators/identifier-names-generators/IIdentifierNamesGenerator';
import { IOptions } from '../../../interfaces/options/IOptions';

import { IdentifierNamesGenerator } from '../../../enums/generators/identifier-names-generators/IdentifierNamesGenerator';

import { HexadecimalIdentifierNamesGenerator } from '../../../generators/identifier-names-generators/HexadecimalIdentifierNamesGenerator';
import { MangledIdentifierNamesGenerator } from '../../../generators/identifier-names-generators/MangledIdentifierNamesGenerator';

export const generatorsModule: interfaces.ContainerModule = new ContainerModule((bind: interfaces.Bind) => {
    // identifier name generators
    bind<IIdentifierNamesGenerator>(ServiceIdentifiers.IIdentifierNamesGenerator)
        .to(HexadecimalIdentifierNamesGenerator)
        .inSingletonScope()
        .whenTargetNamed(IdentifierNamesGenerator.HexadecimalIdentifierNamesGenerator);

    bind<IIdentifierNamesGenerator>(ServiceIdentifiers.IIdentifierNamesGenerator)
        .to(MangledIdentifierNamesGenerator)
        .inSingletonScope()
        .whenTargetNamed(IdentifierNamesGenerator.MangledIdentifierNamesGenerator);

    // identifier name generator factory
    bind<IIdentifierNamesGenerator>(ServiceIdentifiers.Factory__IIdentifierNamesGenerator)
        .toFactory<IIdentifierNamesGenerator>((context: interfaces.Context): (options: IOptions) => IIdentifierNamesGenerator => {
            let cachedIdentifierNamesGenerator: IIdentifierNamesGenerator | null = null;

            return (options: IOptions) => {
                if (cachedIdentifierNamesGenerator) {
                    return cachedIdentifierNamesGenerator;
                }

                let identifierNamesGenerator: IIdentifierNamesGenerator;

                switch (options.identifierNamesGenerator) {
                    case IdentifierNamesGenerator.MangledIdentifierNamesGenerator:
                        identifierNamesGenerator = context.container.getNamed<IIdentifierNamesGenerator>(
                            ServiceIdentifiers.IIdentifierNamesGenerator,
                            IdentifierNamesGenerator.MangledIdentifierNamesGenerator
                        );

                        break;

                    case IdentifierNamesGenerator.HexadecimalIdentifierNamesGenerator:
                    default:
                        identifierNamesGenerator = context.container.getNamed<IIdentifierNamesGenerator>(
                            ServiceIdentifiers.IIdentifierNamesGenerator,
                            IdentifierNamesGenerator.HexadecimalIdentifierNamesGenerator
                        );
                }

                cachedIdentifierNamesGenerator = identifierNamesGenerator;

                return identifierNamesGenerator;
            };
        });
});