<?php

namespace TPsoft\Nutrio;

class Maintenance extends \TPsoft\DBmodel\Maintenance
{

	public function database()
	{
		if (!$this->existsTable('options')) {
			$this->checkDBTable('options', '
				`key` VARCHAR(255) NOT NULL PRIMARY KEY,
				`value` VARCHAR(255) NOT NULL
			');
			$this->dbver(1);
		}
		$dbver = $this->dbver();
		if ($dbver == 1) {
			$this->checkDBTable('users', '
				`user_id` BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
				`email` VARCHAR(255) NOT NULL UNIQUE,
				`password_hash` VARCHAR(255) NOT NULL,
				`created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
			');
			$this->dbver(2);
			$dbver = 2;
		}
		if ($dbver == 2) {
			$this->checkDBTable('ingredients', '
				`ingredient_id` BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
				`user_id` BIGINT UNSIGNED NULL,                  -- NULL = nikoho surovina, 0 = globalna, alebo viazaná na usera
				`name` VARCHAR(255) NOT NULL,
				-- hodnoty na 100g
				`protein_g_100` DECIMAL(7,2) NOT NULL DEFAULT 0, -- bielkoviny
				`carbs_g_100`   DECIMAL(7,2) NOT NULL DEFAULT 0, -- sacharidy
				`sugar_g_100`   DECIMAL(7,2) NOT NULL DEFAULT 0, -- cukry (subset carbs)
				`fat_g_100`     DECIMAL(7,2) NOT NULL DEFAULT 0, -- tuky
				`fiber_g_100`   DECIMAL(7,2) NOT NULL DEFAULT 0, -- voliteľné
				-- voliteľne: kcal na 100g (môžeš aj dopočítať z makier)
				`kcal_100`      DECIMAL(8,2) NULL,
				`created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
				CONSTRAINT fk_ingredients_user
					FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE SET NULL,
				INDEX idx_ingredients_user_name (user_id, name)
			');
			$this->dbver(3);
			$dbver = 3;
		}
		if ($dbver == 3) {
			$this->checkDBTable('meals', '
				`meal_id` BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
				`user_id` BIGINT UNSIGNED NOT NULL,
				`name` VARCHAR(255) NOT NULL,
				`meal_type` ENUM("breakfast","lunch","dinner") NOT NULL,
				`created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
				CONSTRAINT fk_meals_user
					FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
				INDEX idx_meals_user_type (user_id, meal_type)
			');
			$this->dbver(4);
			$dbver = 4;
		}
		if ($dbver == 4) {
			$this->checkDBTable('meal_items', '
				`meal_item_id` BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
				`meal_id` BIGINT UNSIGNED NOT NULL,
				`ingredient_id` BIGINT UNSIGNED NOT NULL,
				`grams` DECIMAL(10,2) NOT NULL, -- zadaná hmotnosť
				`position` INT UNSIGNED NOT NULL DEFAULT 1, -- poradie v UI
				CONSTRAINT fk_meal_items_meal
					FOREIGN KEY (meal_id) REFERENCES meals(meal_id) ON DELETE CASCADE,
				CONSTRAINT fk_meal_items_ingredient
					FOREIGN KEY (ingredient_id) REFERENCES ingredients(ingredient_id) ON DELETE RESTRICT,
				INDEX idx_meal_items_meal (meal_id),
				INDEX idx_meal_items_ingredient (ingredient_id)
			');
			$this->dbver(5);
			$dbver = 5;
		}
		if ($dbver == 5) {
			$this->checkDBTable('diary_days', '
				`diary_day_id` BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
				`user_id` BIGINT UNSIGNED NOT NULL,
				`day_date` DATE NOT NULL,
				`created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
				CONSTRAINT fk_diary_days_user
					FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE,
				UNIQUE KEY uniq_user_day (user_id, day_date)
			');
			$this->dbver(6);
			$dbver = 6;
		}
		if ($dbver == 6) {
			$this->checkDBTable('diary_entries', '
				`diary_entry_id` BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
				`diary_day_id` BIGINT UNSIGNED NOT NULL,
				`meal_type` ENUM("breakfast","lunch","dinner") NOT NULL,
				`meal_id` BIGINT UNSIGNED NOT NULL,
				`created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
				CONSTRAINT fk_diary_entries_day
					FOREIGN KEY (diary_day_id) REFERENCES diary_days(diary_day_id) ON DELETE CASCADE,
				CONSTRAINT fk_diary_entries_meal
					FOREIGN KEY (meal_id) REFERENCES meals(meal_id) ON DELETE RESTRICT,
				UNIQUE KEY uniq_day_mealtype (diary_day_id, meal_type),
				INDEX idx_diary_entries_meal (meal_id)
			');
			$this->dbver(7);
			$dbver = 7;
		}
		if ($dbver == 7) {
			$this->checkDBAdd('users', 'token', 'VARCHAR(255) DEFAULT NULL AFTER `password_hash`');
			$this->checkDBAdd('users', 'token_expires', 'DATETIME DEFAULT NULL AFTER `token`');
			$this->dbver(8);
			$dbver = 8;
		}
	}

	protected function settings(string $key, ?string $value = null): string|false
	{
		if (is_null($value)) {
			return $this->dbh->getOne(sprintf('SELECT `value` FROM `options` WHERE `key` = %s', $this->dbh->quote($key)));
		} else {
			$db_type = $this->dbh->getDBtype();
			switch ($db_type) {
				case 'mysql':
					return $this->dbh->query(sprintf(
						'INSERT INTO `options` (`key`, `value`) VALUES (%s, %s) ON DUPLICATE KEY UPDATE `value` = %s',
						$this->dbh->quote($key),
						$this->dbh->quote($value),
						$this->dbh->quote($value)
					)) !== false;
					break;
				case 'sqlite':
					return $this->dbh->query(sprintf(
						'INSERT INTO `options` (`key`, `value`) VALUES (%s, %s) ON CONFLICT(`key`) DO UPDATE SET `value` = %s',
						$this->dbh->quote($key),
						$this->dbh->quote($value),
						$this->dbh->quote($value)
					)) !== false;
					break;
				default:
					new \Exception('Unknown DB type: ' . $db_type);
					return false;
					break;
			}
		}
	}

	protected function dbver(?string $ver = null)
	{
		return $this->settings('version', $ver);
	}
}