import "reflect-metadata"
import { DataSource } from "../../../src/data-source/DataSource"
import {
    closeTestingConnections,
    createTestingConnections,
    reloadTestingDatabases,
} from "../../utils/test-utils"
import { IndexMetadata } from "../../../src/metadata/IndexMetadata"
import { Teacher } from "./entity/Teacher"
import { Student } from "./entity/Student"
import { TableIndex } from "../../../src/schema-builder/table/TableIndex"
import { expect } from "chai"

describe("schema builder > change index", () => {
    let connections: DataSource[]
    before(async () => {
        connections = await createTestingConnections({
            entities: [__dirname + "/entity/*{.js,.ts}"],
            schemaCreate: true,
            dropSchema: true,
        })
    })
    beforeEach(() => reloadTestingDatabases(connections))
    after(() => closeTestingConnections(connections))

    it("should correctly add new index", () =>
        Promise.all(
            connections.map(async (connection) => {
                const teacherMetadata = connection.getMetadata(Teacher)
                const nameColumn =
                    teacherMetadata.findColumnWithPropertyName("name")!
                const indexMetadata = new IndexMetadata({
                    entityMetadata: teacherMetadata,
                    columns: [nameColumn],
                    args: {
                        target: Teacher,
                        synchronize: true,
                    },
                })
                indexMetadata.build(connection.namingStrategy)
                teacherMetadata.indices.push(indexMetadata)

                await connection.synchronize()

                const queryRunner = connection.createQueryRunner()
                const teacherTable = await queryRunner.getTable("teacher")
                await queryRunner.release()

                teacherTable!.indices.length.should.be.equal(1)

                // revert changes
                teacherMetadata.indices.splice(
                    teacherMetadata.indices.indexOf(indexMetadata),
                    1,
                )
            }),
        ))

    it("should correctly change index", () =>
        Promise.all(
            connections.map(async (connection) => {
                const studentMetadata = connection.getMetadata(Student)
                studentMetadata.indices[0].name = "changed_index"

                await connection.synchronize()

                const queryRunner = connection.createQueryRunner()
                const studentTable = await queryRunner.getTable("student")
                await queryRunner.release()

                const index = studentTable!.indices.find(
                    (i) => i.name === "changed_index",
                )
                expect(index).not.be.undefined
            }),
        ))

    it("should correctly drop removed index", () =>
        Promise.all(
            connections.map(async (connection) => {
                const studentMetadata = connection.getMetadata(Student)
                studentMetadata.indices.splice(0, 1)

                await connection.synchronize()

                const queryRunner = connection.createQueryRunner()
                const studentTable = await queryRunner.getTable("student")
                await queryRunner.release()
                // CockroachDB also stores indices for relation columns
                if (connection.driver.options.type === "cockroachdb") {
                    studentTable!.indices.length.should.be.equal(2)
                } else {
                    studentTable!.indices.length.should.be.equal(0)
                }
            }),
        ))

    it("should ignore index synchronization when `synchronize` set to false", () =>
        Promise.all(
            connections.map(async (connection) => {
                // You can not disable synchronization for unique index in CockroachDB, because unique indices are stored as UNIQUE constraints

                const queryRunner = connection.createQueryRunner()
                let teacherTable = await queryRunner.getTable("teacher")
                teacherTable!.indices.length.should.be.equal(0)

                const index = new TableIndex({
                    name: "ignored_index",
                    columnNames: ["name"],
                    isUnique: true,
                })
                await queryRunner.createIndex(teacherTable!, index)

                teacherTable = await queryRunner.getTable("teacher")
                // CockroachDB stores unique indices as UNIQUE constraints
                if (connection.driver.options.type === "cockroachdb") {
                    teacherTable!.indices.length.should.be.equal(0)
                    teacherTable!.uniques.length.should.be.equal(1)
                    teacherTable!.findColumnByName("name")!.isUnique.should.be
                        .true
                } else {
                    teacherTable!.indices.length.should.be.equal(1)
                    teacherTable!.indices[0].isUnique!.should.be.true
                }

                await connection.synchronize()

                teacherTable = await queryRunner.getTable("teacher")
                // CockroachDB stores unique indices as UNIQUE constraints
                if (connection.driver.options.type === "cockroachdb") {
                    teacherTable!.indices.length.should.be.equal(0)
                    teacherTable!.uniques.length.should.be.equal(0)
                    teacherTable!.findColumnByName("name")!.isUnique.should.be
                        .false
                } else {
                    teacherTable!.indices.length.should.be.equal(1)
                    teacherTable!.indices[0].isUnique!.should.be.true
                }

                await queryRunner.release()
            }),
        ))
})