<?php

	require_once __DIR__.'/../../include/php/const';

	function api_deploy($init){

		/* [1] Fetch api response
		=========================================================*/
		/* (1) Try to read response */
		$file_r = @file_get_contents(TMP_DIR.'/api.response');

		/* (2) Check response */
		if( $file_r === false ){
			slog('Cannot find api.response file', 'api:deploy', 'update');
			return 127;
		}

		/* (3) Try to parse response */
		$arr_r = json_decode($file_r, true);

		/* (4) Check parse error */
		if( is_null($arr_r) ){
			slog('Cannot parse api.response file', 'api:deploy', 'update');
			return 127;
		}


		/* [2] Get system states (global_state)
		=========================================================*/
		/* (1) Check data */
		if( !isset($arr_r['states']) || !is_array($arr_r['states']) ){
			slog('No \'states\' found in api.response file', 'api:deploy', 'update');
			return 127;
		}

		/* (2) Reset file */
		file_put_contents(STATES_CONF, '');

		/* (3) Replace content */
		$f = new SplFileObject(STATES_CONF, 'w');

		foreach($arr_r['states'] as $state)
			$f->fwrite( json_encode([

				$state['global_state'],
				$state['chips']

			]).PHP_EOL );

		$f = null;


		/* [3] Get chip list (chips)
		=========================================================*/
		/* (1) Check data */
		if( !isset($arr_r['chips']) || !is_array($arr_r['chips']) ){
			slog('No \'chips\' found in api.response file', 'api:deploy', 'update');
			return 127;
		}

		/* (2) Reset file */
		file_put_contents(CHIPS_CONF, '');

		/* (3) Replace content */
		$f = new SplFileObject(CHIPS_CONF, 'w');

		foreach($arr_r['chips'] as $chip)
			$f->fwrite( json_encode([

				(int) $chip['position'],
				$chip['pins'],
				$chip['states']

			]).PHP_EOL );

		$f = null;


		/* [4] Get auth list (permissions)
		=========================================================*/
		/* (1) Check data */
		if( !isset($arr_r['permissions']) || !is_array($arr_r['permissions']) ){
			slog('No \'permissions\' found in api.response file', 'api:deploy', 'update');
			return 127;
		}

		/* (2) Reset file */
		file_put_contents(AUTH_CONF, '');

		/* (3) Replace content */
		$f = new SplFileObject(AUTH_CONF, 'w');

		foreach($arr_r['permissions'] as $code=>$perm)
			$f->fwrite( json_encode([

				$code,
				(int) $perm['id_user'],
				$perm['actions']

			]).PHP_EOL );

		$f = null;


		/* [5] Get action list (with timeout)
		=========================================================*/
		/* (1) Check data */
		if( !isset($arr_r['actions']) || !is_array($arr_r['actions']) ){
			slog('No \'actions\' found in api.response file', 'api:deploy', 'update');
			return 127;
		}

		/* (2) Reset file */
		file_put_contents(ACTIONS_CONF, '');

		/* (3) Replace content */
		$f = new SplFileObject(ACTIONS_CONF, 'w');

		foreach($arr_r['actions'] as $timeout=>$actions)
			foreach($actions as $action)
				$f->fwrite( json_encode([

					(int) $timeout,
					(int) $action['id_action'],
					$action['previous'],
					$action['action']

				]).PHP_EOL );

		$f = null;


		/* [6] Remove history entries
		=========================================================*/
		/* (0) We are done if @init */
		if( $init ){
			slog('Post-init deployment -> no history truncate', 'api:deploy', 'update');
			return 0;
		}

		/* (1) Check history entries count */
		if( !isset($arr_r['saved']) || !is_array($arr_r['saved']) ){
			slog('No \'saved\' found in api.response file', 'api:deploy', 'update');
			return 127;
		}

		/* (2) Check history count */
		if( !isset($arr_r['saved']['history']) || !is_numeric($arr_r['saved']['history']) ){
			slog('No \'actions\'.\'history\' found in api.response file', 'api:deploy', 'update');
			return 127;
		}

		/* (3) Fetch number of entries */
		$saved = intval($arr_r['saved']['history']);
		$saved = $saved < 0 ? 0 : $saved; // prevent negative

		/* (4) Truncate the log file */
		if( $saved > 0 )
			$saved++; // because need to be excluded

		$truncated = syscall(SOURCE_DIR."/lib/file/truncate mfrc522 {$saved}");

		/* (5) Manage error */
		if( $truncated === false ){
			slog('History cannot be truncated', 'api:deploy', 'update');
			return 127;
		}


		slog('History succesfully truncated', 'api:deploy', 'update');
		return 0;
	}


	/* Manage init vs. sync */
	$is_init = false;
	if( $argc > 1 && $argv[1] == 'init' )
		$is_init = true;

	$exec = api_deploy($is_init);

	if( $exec == 0 )
		slog('Deployment successfully achieved', 'main', 'update');
	else
		slog('Deployment failed', 'main', 'update');

	echo $exec;
	die($exec);


?>