package sqlite3

import (
	"context"

	"github.com/c9s/rockhopper"
)

func init() {
	rockhopper.AddMigration(upKlines, downKlines)
}

func upKlines(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
	// This code is executed when the migration is applied.

	_, err = tx.ExecContext(ctx, "CREATE TABLE `klines`\n(\n    `gid`           INTEGER PRIMARY KEY AUTOINCREMENT,\n    `exchange`      VARCHAR(10)             NOT NULL,\n    `start_time`    DATETIME(3)             NOT NULL,\n    `end_time`      DATETIME(3)             NOT NULL,\n    `interval`      VARCHAR(3)              NOT NULL,\n    `symbol`        VARCHAR(7)              NOT NULL,\n    `open`          DECIMAL(16, 8)  NOT NULL,\n    `high`          DECIMAL(16, 8)  NOT NULL,\n    `low`           DECIMAL(16, 8)  NOT NULL,\n    `close`         DECIMAL(16, 8)  NOT NULL DEFAULT 0.0,\n    `volume`        DECIMAL(16, 8)  NOT NULL DEFAULT 0.0,\n    `closed`        BOOLEAN         NOT NULL DEFAULT TRUE,\n    `last_trade_id` INT             NOT NULL DEFAULT 0,\n    `num_trades`    INT             NOT NULL DEFAULT 0\n);")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "CREATE INDEX `klines_end_time_symbol_interval` ON klines (`end_time`, `symbol`, `interval`);")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "CREATE TABLE `okex_klines` AS SELECT * FROM `klines` WHERE 0")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "CREATE TABLE `binance_klines` AS SELECT * FROM `klines` WHERE 0")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "CREATE TABLE `max_klines` AS SELECT * FROM `klines` WHERE 0")
	if err != nil {
		return err
	}

	return err
}

func downKlines(ctx context.Context, tx rockhopper.SQLExecutor) (err error) {
	// This code is executed when the migration is rolled back.

	_, err = tx.ExecContext(ctx, "DROP INDEX IF EXISTS `klines_end_time_symbol_interval`;")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "DROP TABLE IF EXISTS `binance_klines`;")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "DROP TABLE IF EXISTS `okex_klines`;")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "DROP TABLE IF EXISTS `max_klines`;")
	if err != nil {
		return err
	}

	_, err = tx.ExecContext(ctx, "DROP TABLE IF EXISTS `klines`;")
	if err != nil {
		return err
	}

	return err
}