import type { CreateSchemaQueryOptions } from '@sequelize/core';
import { DataTypes, QueryTypes, sql } from '@sequelize/core';
import { basicComparator } from '@sequelize/utils';
import { expect } from 'chai';
import { spy } from 'sinon';
import { sequelize } from '../support';

const { dialect } = sequelize;
const testSchema = 'testSchema';
const queryInterface = sequelize.queryInterface;

describe('QueryInterface#{create,drop,list}Schema', () => {
  if (!dialect.supports.schemas) {
    it('should throw, indicating that the method is not supported', async () => {
      await expect(queryInterface.createSchema(testSchema)).to.be.rejectedWith(
        `Schemas are not supported in ${dialect.name}.`,
      );
      await expect(queryInterface.dropSchema(testSchema)).to.be.rejectedWith(
        `Schemas are not supported in ${dialect.name}.`,
      );
      await expect(queryInterface.listSchemas()).to.be.rejectedWith(
        `Schemas are not supported in ${dialect.name}.`,
      );
    });

    return;
  }

  it('creates a schema', async () => {
    const preCreationSchemas = await queryInterface.listSchemas();
    expect(preCreationSchemas).to.not.include(testSchema, 'testSchema existed before tests ran');

    await queryInterface.createSchema(testSchema);
    const postCreationSchemas = await queryInterface.listSchemas();
    expect(postCreationSchemas).to.include(testSchema, 'createSchema did not create testSchema');
  });

  if (dialect.supports.createSchema.authorization) {
    it('creates a schema with an authorization', async () => {
      if (dialect.name === 'mssql') {
        await sequelize.query(
          `IF SUSER_ID (N'myUser') IS NULL CREATE LOGIN [myUser] WITH PASSWORD = 'Password12!'`,
        );
        await sequelize.query(
          `IF DATABASE_PRINCIPAL_ID (N'myUser') IS NULL CREATE USER [myUser] FOR LOGIN [myUser]`,
        );
        await queryInterface.createSchema(testSchema, { authorization: 'myUser' });
      } else if (dialect.name === 'postgres') {
        await sequelize.query(
          `DROP ROLE IF EXISTS "myUser"; CREATE ROLE "myUser" WITH LOGIN PASSWORD 'Password12!' CREATEDB`,
        );
        await queryInterface.createSchema(testSchema, { authorization: 'myUser' });
      } else {
        await queryInterface.createSchema(testSchema, { authorization: sql`CURRENT_USER` });
      }

      const postCreationSchemas = await queryInterface.listSchemas();
      expect(postCreationSchemas).to.include(testSchema, 'createSchema did not create testSchema');

      if (['mssql', 'postgres'].includes(dialect.name)) {
        const [result] = await sequelize.query<{ schema_owner: string }>(
          `SELECT schema_owner FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = '${testSchema}'`,
          { type: QueryTypes.SELECT },
        );
        expect(result.schema_owner).to.equal('myUser');
      } else if (dialect.name === 'db2') {
        const [result] = await sequelize.query<{ OWNER: string }>(
          `SELECT OWNER FROM syscat.schemata WHERE SCHEMANAME = '${testSchema}'`,
          { type: QueryTypes.SELECT },
        );
        expect(result.OWNER).to.equal('CURRENT_USER');
      }

      await queryInterface.dropSchema(testSchema);
      if (dialect.name === 'mssql') {
        await sequelize.query('DROP USER [myUser]');
        await sequelize.query('DROP LOGIN [myUser]');
      } else if (dialect.name === 'postgres') {
        await sequelize.query('DROP ROLE "myUser"');
      }
    });
  }

  if (dialect.supports.createSchema.charset) {
    it('creates a schema with a charset', async () => {
      await queryInterface.createSchema(testSchema, { charset: 'utf8mb4' });
      const postCreationSchemas = await queryInterface.listSchemas();
      expect(postCreationSchemas).to.include(testSchema, 'createSchema did not create testSchema');

      const [result] = await sequelize.query<{ DEFAULT_CHARACTER_SET_NAME: string }>(
        `SELECT DEFAULT_CHARACTER_SET_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = '${testSchema}'`,
        { type: QueryTypes.SELECT },
      );
      expect(result.DEFAULT_CHARACTER_SET_NAME).to.equal('utf8mb4');
    });
  }

  if (dialect.supports.createSchema.collate) {
    it('creates a schema with a collate', async () => {
      await queryInterface.createSchema(testSchema, { collate: 'latin2_general_ci' });
      const postCreationSchemas = await queryInterface.listSchemas();
      expect(postCreationSchemas).to.include(testSchema, 'createSchema did not create testSchema');

      const [result] = await sequelize.query<{ DEFAULT_COLLATION_NAME: string }>(
        `SELECT DEFAULT_COLLATION_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = '${testSchema}'`,
        { type: QueryTypes.SELECT },
      );
      expect(result.DEFAULT_COLLATION_NAME).to.equal('latin2_general_ci');
    });
  }

  if (dialect.supports.createSchema.comment) {
    it('creates a schema with a comment', async () => {
      await queryInterface.createSchema(testSchema, { comment: 'myComment' });
      const postCreationSchemas = await queryInterface.listSchemas();
      expect(postCreationSchemas).to.include(testSchema, 'createSchema did not create testSchema');

      const [result] = await sequelize.query<{ SCHEMA_COMMENT: string }>(
        `SELECT SCHEMA_COMMENT FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = '${testSchema}'`,
        { type: QueryTypes.SELECT },
      );
      expect(result.SCHEMA_COMMENT).to.equal('myComment');
    });
  }

  if (dialect.supports.createSchema.ifNotExists) {
    it('does not throw if the schema already exists', async () => {
      await queryInterface.createSchema(testSchema);
      const postCreationSchemas = await queryInterface.listSchemas();
      expect(postCreationSchemas).to.include(testSchema, 'createSchema did not create testSchema');

      await queryInterface.createSchema(testSchema, { ifNotExists: true });
      const postReplaceSchemas = await queryInterface.listSchemas();
      expect(postReplaceSchemas).to.include(testSchema, 'createSchema did not create testSchema');
    });
  }

  if (dialect.supports.createSchema.replace) {
    it('replaces a schema if it already exists', async () => {
      await queryInterface.createSchema(testSchema);
      const postCreationSchemas = await queryInterface.listSchemas();
      expect(postCreationSchemas).to.include(testSchema, 'createSchema did not create testSchema');

      await queryInterface.createTable(
        { tableName: 'testTable', schema: testSchema },
        { id: { type: DataTypes.INTEGER, primaryKey: true } },
      );
      await queryInterface.createSchema(testSchema, { replace: true });
      const postReplaceSchemas = await queryInterface.listSchemas();
      const postReplaceTables = await queryInterface.listTables({ schema: testSchema });
      expect(postReplaceSchemas).to.include(testSchema, 'createSchema did not replace testSchema');
      expect(postReplaceTables).to.be.empty;
    });
  }

  it(`passes options through to the queryInterface's queryGenerator`, async () => {
    const options: CreateSchemaQueryOptions = {
      collate: 'en_US.UTF-8',
      charset: 'utf8mb4',
    };
    const queryGeneratorSpy = spy(sequelize.queryGenerator, 'createSchemaQuery');

    try {
      await queryInterface.createSchema(testSchema, options);
    } catch {
      // Dialects which don't support collate/charset will throw
    }

    expect(queryGeneratorSpy.args[0]).to.include(options);
  });

  it('drops a schema', async () => {
    await queryInterface.createSchema(testSchema);
    const preDeletionSchemas = await queryInterface.listSchemas();
    expect(preDeletionSchemas).to.include(testSchema, 'createSchema did not create testSchema');

    await queryInterface.dropSchema(testSchema);
    const postDeletionSchemas = await queryInterface.listSchemas();
    expect(postDeletionSchemas).to.not.include(testSchema, 'dropSchema did not drop testSchema');
  });

  it('shows all schemas', async () => {
    await queryInterface.createSchema(testSchema);
    const allSchemas = await queryInterface.listSchemas();

    const expected = !dialect.supports.multiDatabases
      ? [sequelize.dialect.getDefaultSchema(), testSchema]
      : [testSchema];

    expect(allSchemas.sort()).to.deep.eq(expected.sort(basicComparator()));
  });
});