<?php

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

	function api_deploy($sync){

		/* [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($arr_r) || !isset($arr_r['feature']) ){
			slog('Cannot parse api.response file', 'api:deploy', 'update');
			return 127;
		}


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

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

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

		foreach($arr_r['etrees'] as $etree)
			$f->fwrite( $etree.PHP_EOL );

		$f = null;


		/* [3] Get the list of daemons (features)
		=========================================================*/
		$feature = [];
		$f = new SplFileObject(ETREE_CONF, 'r');

		while( !$f->eof() ){

			/* (1) Try to parse each line */
			$etree = trim($f->fgets(), "\n");

			/* (2) Manage error */
			if( is_null($etree) || strlen($etree) == 0 )
				continue;

			/* (3) Add entry to log */
			$feature[] = $etree;

		}
		$f = null;


		/* [4] Remove features' entries
		=========================================================*/
		/* (0) We are done if @sync */
		if( $sync ){
			slog('Post-sync deployment -> no history truncate', "$FEATURE:deploy", 'update');
			return 0;
		}

		if( isset($arr_r['saved']) && is_array($arr_r['saved']) ){

			foreach($arr_r['saved'] as $feat_name=>$count){

				/* (2) Check history count */
				if( !is_numeric($count) ){
					slog("No \'history\' found for '$feat_name' in response file", "$FEATURE:deploy", 'update');
					return 127;
				}

				/* (3) Fetch number of entries */
				$saved = intval($count);
				$saved = $saved < 0 ? 0 : $saved; // prevent negative

				/* (4) Truncate the log file */
				$truncated = syscall(SOURCE_DIR."/lib/file/truncate $feat_name {$saved}");

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


				slog("History '$feat_name' succesfully truncated", "$FEATURE:deploy", 'update');

			}

		}


		/* [5] Launch deploy script for each feature
		=========================================================*/
		/* (1) For each feature */
		foreach($feature as $feat_name){

			/* (2) Check if specific data in response */
			if( !isset($arr_r['feature'][$feat_name]) )
				continue;

			/* (3) Check for feature deploy script */
			if( !file_exists(SOURCE_DIR."/feature/$feat_name/deploy") )
				continue;

			/* (4) Write useful exclusive data to tmp file */
			file_put_contents(TMP_DIR."/$feat_name", json_encode($arr_r['feature'][$feat_name]));

			/* (4) Execute deploy script */
			$sync_suffix = $sync ? ' sync' : '';
			syscall(SOURCE_DIR."/feature/$feat_name/deploy$sync");

		}


		return 0;
	}


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

	$exec = api_deploy($is_sync);

	if( $exec == 0 ) slog('Success', 'api:deploy', 'update');
	else             slog('Failure', 'api:deploy', 'update');

	echo $exec;
	die($exec);


?>