CREATE TABLE `challenges` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `token` int(10) unsigned NOT NULL,
  `timer_sec` int(10) unsigned,
  `no_move` tinyint(1) NOT NULL DEFAULT 0,
  `no_pan` tinyint(1) NOT NULL DEFAULT 0,
  `no_zoom` tinyint(1) NOT NULL DEFAULT 0,
  `created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;

CREATE TABLE `user_in_challenge` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `user_id` int(10) unsigned NOT NULL,
  `challenge_id` int(10) unsigned NOT NULL,
  `round` smallint(5) signed NOT NULL DEFAULT -1,
  `score` int(10) unsigned NOT NULL DEFAULT 0,
  `time_left` int(10) unsigned,
  `owner` tinyint(1) NOT NULL DEFAULT 0,
  PRIMARY KEY (`id`),
  KEY `user_id` (`user_id`),
  KEY `challenge_id` (`challenge_id`),
  CONSTRAINT `user_in_challenge_user_id` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`),
  CONSTRAINT `user_in_challenge_challenge_id` FOREIGN KEY (`challenge_id`) REFERENCES `challenges` (`id`)
) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;

CREATE TABLE `place_in_challenge` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `place_id` int(10) unsigned NOT NULL,
  `challenge_id` int(10) unsigned NOT NULL,
  `order` smallint(5) unsigned NOT NULL,
  PRIMARY KEY (`id`),
  KEY `place_id` (`place_id`),
  KEY `challenge_id` (`challenge_id`),
  CONSTRAINT `place_in_challenge_place_id` FOREIGN KEY (`place_id`) REFERENCES `places` (`id`),
  CONSTRAINT `place_in_challenge_challenge_id` FOREIGN KEY (`challenge_id`) REFERENCES `challenges` (`id`),
  CONSTRAINT `unique_order_in_challenge` UNIQUE (`order`, `challenge_id`)
) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;

CREATE TABLE `guesses` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `user_id` int(10) unsigned NOT NULL,
  `place_in_challenge_id` int(10) unsigned NOT NULL,
  `lat` decimal(8,6) NOT NULL,
  `lng` decimal(9,6) NOT NULL,
  `time_spent` int(10),
  PRIMARY KEY (`id`),
  KEY `user_id` (`user_id`),
  KEY `place_in_challenge_id` (`place_in_challenge_id`),
  CONSTRAINT `guesses_user_id` FOREIGN KEY (`user_id`) REFERENCES `places` (`id`),
  CONSTRAINT `guesses_place_in_challenge_id` FOREIGN KEY (`place_in_challenge_id`) REFERENCES `place_in_challenge` (`id`)
) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;