import { ParseTreeListener } from 'antlr4ng';
import fs from 'fs';
import path from 'path';
import { PostgreSQLParserListener } from 'src/lib/pgsql/PostgreSQLParserListener';
import { EntityContextType } from 'src/parser/common/basic-parser-types';
import { StmtContextType } from 'src/parser/common/entityCollector';
import PostgreSQL, { PostgreSQLEntityCollector, PostgreSqlSplitListener } from 'src/parser/pgsql';

const commonSql = fs.readFileSync(path.join(__dirname, 'fixtures', 'common.sql'), 'utf-8');

describe('PostgreSQL entity collector tests', () => {
    const postgreSql = new PostgreSQL();
    const parseTree = postgreSql.parse(commonSql);
    const splitListener = new PostgreSqlSplitListener();
    postgreSql.listen(splitListener as PostgreSQLParserListener, parseTree);

    test('validate common sql', () => {
        expect(postgreSql.validate(commonSql).length).toBe(0);
    });

    test('split results', () => {
        expect(splitListener.statementsContext.length).toBe(10);
    });

    test('create database', () => {
        const testingContext = splitListener.statementsContext[0];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(1);

        const sourceTableEntity = allEntities[0];

        expect(sourceTableEntity.entityContextType).toBe(EntityContextType.DATABASE_CREATE);
        expect(sourceTableEntity.belongStmt.stmtContextType).toBe(
            StmtContextType.CREATE_DATABASE_STMT
        );
        expect(sourceTableEntity.text).toBe('music2');
    });

    test('create table by select', () => {
        const testingContext = splitListener.statementsContext[1];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(3);

        const tableCreateEntity = allEntities[0];

        expect(tableCreateEntity.entityContextType).toBe(EntityContextType.TABLE_CREATE);
        expect(tableCreateEntity.text).toBe('films_recent');
        expect(tableCreateEntity.position).toEqual({
            startIndex: 110,
            endIndex: 121,
            line: 6,
            startColumn: 14,
            endColumn: 26,
        });

        expect(tableCreateEntity.belongStmt.stmtContextType).toBe(
            StmtContextType.CREATE_TABLE_STMT
        );
        expect(tableCreateEntity.belongStmt.position).toEqual({
            startIndex: 97,
            endIndex: 246,
            startLine: 6,
            endLine: 7,
            startColumn: 1,
            endColumn: 122,
        });

        expect(tableCreateEntity.columns).toBeNull();

        expect(tableCreateEntity.relatedEntities.length).toBe(2);
        tableCreateEntity.relatedEntities.forEach((relatedEntity) => {
            expect(relatedEntity.entityContextType).toBe(EntityContextType.TABLE);
            expect(allEntities.some((en) => relatedEntity === en)).toBeTruthy();
        });

        expect(allEntities[1].text).toBe('films');
        expect(allEntities[1].belongStmt.rootStmt).toBe(allEntities[0].belongStmt);
        expect(allEntities[1].position).toEqual({
            startIndex: 168,
            endIndex: 172,
            line: 7,
            startColumn: 43,
            endColumn: 48,
        });

        expect(allEntities[2].text).toBe('films2');
        expect(allEntities[2].belongStmt.rootStmt).toBe(allEntities[0].belongStmt);
        expect(allEntities[2].position).toEqual({
            startIndex: 179,
            endIndex: 184,
            line: 7,
            startColumn: 54,
            endColumn: 60,
        });
    });

    test('create table of columns', () => {
        const testingContext = splitListener.statementsContext[2];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(1);

        const tableCreateEntity = allEntities[0];

        expect(tableCreateEntity.entityContextType).toBe(EntityContextType.TABLE_CREATE);
        expect(tableCreateEntity.text).toBe('distributors');
        expect(tableCreateEntity.position).toEqual({
            startIndex: 263,
            endIndex: 274,
            line: 9,
            startColumn: 14,
            endColumn: 26,
        });

        expect(tableCreateEntity.belongStmt.stmtContextType).toBe(
            StmtContextType.CREATE_TABLE_STMT
        );
        expect(tableCreateEntity.belongStmt.position).toEqual({
            startIndex: 250,
            endIndex: 377,
            startLine: 9,
            endLine: 13,
            startColumn: 1,
            endColumn: 2,
        });

        expect(tableCreateEntity.columns.length).toBe(3);
        tableCreateEntity.columns.forEach((columEntity) => {
            expect(columEntity.entityContextType).toBe(EntityContextType.COLUMN_CREATE);
            expect(columEntity.belongStmt).toBe(tableCreateEntity.belongStmt);
            expect(columEntity.text).toBe(
                commonSql.slice(columEntity.position.startIndex, columEntity.position.endIndex + 1)
            );
        });
    });

    test('create foreign table by columns', () => {
        const testingContext = splitListener.statementsContext[3];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(1);

        const tableCreateEntity = allEntities[0];

        expect(tableCreateEntity.entityContextType).toBe(EntityContextType.TABLE_CREATE);
        expect(tableCreateEntity.text).toBe('films');
        expect(tableCreateEntity.position).toEqual({
            startIndex: 402,
            endIndex: 406,
            line: 15,
            startColumn: 22,
            endColumn: 27,
        });

        expect(tableCreateEntity.belongStmt.stmtContextType).toBe(
            StmtContextType.CREATE_TABLE_STMT
        );
        expect(tableCreateEntity.belongStmt.position).toEqual({
            startIndex: 381,
            endIndex: 626,
            startLine: 15,
            endLine: 23,
            startColumn: 1,
            endColumn: 19,
        });

        expect(tableCreateEntity.columns.length).toBe(6);
        tableCreateEntity.columns.forEach((columEntity) => {
            expect(columEntity.entityContextType).toBe(EntityContextType.COLUMN_CREATE);
            expect(columEntity.belongStmt).toBe(tableCreateEntity.belongStmt);
            expect(columEntity.text).toBe(
                commonSql.slice(columEntity.position.startIndex, columEntity.position.endIndex + 1)
            );
        });
    });

    test('create foreign table of partition', () => {
        const testingContext = splitListener.statementsContext[4];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(2);

        const tableCreateEntity = allEntities[0];

        expect(tableCreateEntity.entityContextType).toBe(EntityContextType.TABLE_CREATE);
        expect(tableCreateEntity.text).toBe('measurement_y2016m07');
        expect(tableCreateEntity.position).toEqual({
            startIndex: 651,
            endIndex: 670,
            line: 25,
            startColumn: 22,
            endColumn: 42,
        });

        expect(tableCreateEntity.belongStmt.stmtContextType).toBe(
            StmtContextType.CREATE_TABLE_STMT
        );
        expect(tableCreateEntity.belongStmt.position).toEqual({
            startIndex: 630,
            endIndex: 769,
            startLine: 25,
            endLine: 27,
            startColumn: 1,
            endColumn: 21,
        });

        expect(tableCreateEntity.columns).toBeNull();

        expect(tableCreateEntity.relatedEntities.length).toBe(1);

        const relatedEntity = tableCreateEntity.relatedEntities[0];
        expect(relatedEntity.entityContextType).toBe(EntityContextType.TABLE);
        expect(allEntities.some((en) => relatedEntity === en)).toBeTruthy();
        expect(relatedEntity.text).toBe('measurement');
    });

    test('create view by select', () => {
        const testingContext = splitListener.statementsContext[5];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(2);

        const tableCreateEntity = allEntities[0];

        expect(tableCreateEntity.entityContextType).toBe(EntityContextType.VIEW_CREATE);
        expect(tableCreateEntity.text).toBe('comedies');
        expect(tableCreateEntity.position).toEqual({
            startIndex: 785,
            endIndex: 792,
            line: 29,
            startColumn: 13,
            endColumn: 21,
        });

        expect(tableCreateEntity.belongStmt.stmtContextType).toBe(StmtContextType.CREATE_VIEW_STMT);
        expect(tableCreateEntity.belongStmt.position).toEqual({
            startIndex: 773,
            endIndex: 849,
            startLine: 29,
            endLine: 32,
            startColumn: 1,
            endColumn: 26,
        });

        expect(tableCreateEntity.columns).toBeNull();

        expect(tableCreateEntity.relatedEntities.length).toBe(1);

        const relatedEntity = tableCreateEntity.relatedEntities[0];
        expect(relatedEntity.entityContextType).toBe(EntityContextType.TABLE);
        expect(allEntities.some((en) => relatedEntity === en)).toBeTruthy();
        expect(relatedEntity.text).toBe('films');
    });

    test('create materialized view by columns', () => {
        const testingContext = splitListener.statementsContext[6];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(2);

        const tableCreateEntity = allEntities[0];

        expect(tableCreateEntity.entityContextType).toBe(EntityContextType.VIEW_CREATE);
        expect(tableCreateEntity.text).toBe('comedies_mate');
        expect(tableCreateEntity.position).toEqual({
            startIndex: 878,
            endIndex: 890,
            line: 34,
            startColumn: 26,
            endColumn: 39,
        });

        expect(tableCreateEntity.belongStmt.stmtContextType).toBe(StmtContextType.CREATE_VIEW_STMT);
        expect(tableCreateEntity.belongStmt.position).toEqual({
            startIndex: 853,
            endIndex: 1055,
            startLine: 34,
            endLine: 39,
            startColumn: 1,
            endColumn: 17,
        });

        expect(tableCreateEntity.columns.length).toBe(2);

        tableCreateEntity.columns.forEach((columEntity) => {
            expect(columEntity.entityContextType).toBe(EntityContextType.COLUMN_CREATE);
            expect(columEntity.belongStmt).toBe(tableCreateEntity.belongStmt);
            expect(columEntity.text).toBe(
                commonSql.slice(columEntity.position.startIndex, columEntity.position.endIndex + 1)
            );
        });
    });

    test('select with clause', () => {
        const testingContext = splitListener.statementsContext[7];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(2);

        const tableEntity1 = allEntities[0];
        const tableEntity2 = allEntities[1];
        expect(tableEntity1.entityContextType).toBe(EntityContextType.TABLE);
        expect(tableEntity1.text).toBe('table_expression');
        expect(tableEntity1.position).toEqual({
            startIndex: 1109,
            endIndex: 1124,
            line: 41,
            startColumn: 51,
            endColumn: 67,
        });

        expect(tableEntity1.belongStmt.stmtContextType).toBe(StmtContextType.SELECT_STMT);
        expect(tableEntity1.belongStmt.position).toEqual({
            startIndex: 1094,
            endIndex: 1124,
            startLine: 41,
            endLine: 41,
            startColumn: 36,
            endColumn: 67,
        });
        expect(tableEntity1.columns).toBeNull();
        expect(tableEntity1.relatedEntities).toBeNull();

        expect(tableEntity2.entityContextType).toBe(EntityContextType.TABLE);
        expect(tableEntity2.text).toBe('table_expression1');
        expect(tableEntity2.position).toEqual({
            startIndex: 1182,
            endIndex: 1198,
            line: 42,
            startColumn: 55,
            endColumn: 72,
        });

        expect(tableEntity2.belongStmt.stmtContextType).toBe(StmtContextType.SELECT_STMT);
        expect(tableEntity2.belongStmt.position).toEqual({
            startIndex: 1059,
            endIndex: 1237,
            startLine: 41,
            endLine: 42,
            startColumn: 1,
            endColumn: 111,
        });
        expect(tableEntity2.columns).toBeNull();
        expect(tableEntity2.relatedEntities).toBeNull();
    });

    test('insert into table', () => {
        const testingContext = splitListener.statementsContext[8];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(1);

        const tableInsertEntity = allEntities[0];

        expect(tableInsertEntity.entityContextType).toBe(EntityContextType.TABLE);
        expect(tableInsertEntity.text).toBe('insert_films');
        expect(tableInsertEntity.position).toEqual({
            startIndex: 1253,
            endIndex: 1264,
            line: 44,
            startColumn: 13,
            endColumn: 25,
        });

        expect(tableInsertEntity.belongStmt.stmtContextType).toBe(StmtContextType.INSERT_STMT);
        expect(tableInsertEntity.belongStmt.position).toEqual({
            startIndex: 1241,
            endIndex: 1355,
            startLine: 44,
            endLine: 45,
            startColumn: 1,
            endColumn: 55,
        });

        expect(tableInsertEntity.columns).toBeNull();
        expect(tableInsertEntity.relatedEntities).toBeNull();
    });

    test('create function', () => {
        const testingContext = splitListener.statementsContext[9];

        const collectListener = new PostgreSQLEntityCollector(commonSql);
        postgreSql.listen(collectListener as ParseTreeListener, testingContext);

        const allEntities = collectListener.getEntities();
        expect(allEntities.length).toBe(1);

        const functionEntity = allEntities[0];

        expect(functionEntity.entityContextType).toBe(EntityContextType.FUNCTION_CREATE);
        expect(functionEntity.text).toBe('get_color_note');
        expect(functionEntity.position).toEqual({
            endColumn: 31,
            endIndex: 1388,
            line: 47,
            startColumn: 17,
            startIndex: 1375,
        });

        expect(functionEntity.belongStmt.stmtContextType).toBe(
            StmtContextType.CREATE_FUNCTION_STMT
        );
        expect(functionEntity.belongStmt.position).toEqual({
            endColumn: 15,
            endIndex: 1477,
            endLine: 49,
            startColumn: 1,
            startIndex: 1359,
            startLine: 47,
        });

        expect(functionEntity.columns).toBeNull();
        expect(functionEntity.relatedEntities).toBeNull();
    });
});