<?php

/**
 * dbFacile - A Database API that should have existed from the start
 * Version 0.4.3
 *
 * This code is covered by the MIT license http://en.wikipedia.org/wiki/MIT_License
 *
 * By Alan Szlosek from http://www.greaterscope.net/projects/dbFacile
 *
 * The non-OO version of dbFacile. It's a bit simplistic, but gives you the
 * really useful bits in non-class form.
 *
 * Usage
 * 1. Connect to MySQL as you normally would ... this code uses an existing connection
 * 2. Use dbFacile as you normally would, without the object context
 * 3. Oh, and dbFetchAll() is now dbFetchRows()
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */

use Illuminate\Database\Events\QueryExecuted;
use Illuminate\Database\QueryException;
use Illuminate\Support\Facades\Event;
use LibreNMS\DB\Eloquent;
use LibreNMS\Util\Laravel;

/**
 * Performs a query using the given string.
 *
 * @param  string  $sql
 * @param  array  $parameters
 * @return bool if query was successful or not
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent#building-queries
 * @see https://laravel.com/docs/eloquent#building-queries
 */
function dbQuery($sql, $parameters = [])
{
    try {
        if (empty($parameters)) {
            // don't use prepared statements for queries without parameters
            return Eloquent::DB()->getPdo()->exec($sql) !== false;
        }

        return Eloquent::DB()->statement($sql, (array) $parameters);
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $parameters, $pdoe));

        return false;
    }
}

/**
 * @param  array  $data
 * @param  string  $table
 * @return null|int
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent#inserting-and-updating-models
 * @see https://laravel.com/docs/eloquent#inserting-and-updating-models
 */
function dbInsert($data, $table): ?int
{
    $sql = 'INSERT IGNORE INTO `' . $table . '` (`' . implode('`,`', array_keys($data)) . '`)  VALUES (' . implode(',', dbPlaceHolders($data)) . ')';

    try {
        $result = Eloquent::DB()->insert($sql, (array) $data);

        if ($result) {
            $lastInsertId = Eloquent::DB()->getPdo()->lastInsertId();

            if ($lastInsertId) {
                return (int) $lastInsertId;
            }
        }
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $data, $pdoe));
    }

    return null;
}//end dbInsert()

/**
 * Passed an array and a table name, it attempts to insert the data into the table.
 * $data is an array (rows) of key value pairs.  keys are fields.  Rows need to have same fields.
 * Check for boolean false to determine whether insert failed
 *
 * @param  array  $data
 * @param  string  $table
 * @return bool
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent#inserting-and-updating-models
 * @see https://laravel.com/docs/eloquent#inserting-and-updating-models
 */
function dbBulkInsert($data, $table)
{
    // check that data isn't an empty array
    if (empty($data)) {
        return false;
    }

    // make sure we have fields to insert
    $fields = array_keys(reset($data));
    if (empty($fields)) {
        return false;
    }

    // Break into managable chunks to prevent situations where insert
    // fails due to prepared statement having too many placeholders.
    $data_chunks = array_chunk($data, 10000, true);

    foreach ($data_chunks as $data_chunk) {
        try {
            $result = Eloquent::DB()->table($table)->insert((array) $data_chunk);

            return $result;
        } catch (PDOException $pdoe) {
            // FIXME query?
            dbHandleException(new QueryException('dbFacile', "Bulk insert $table", $data_chunk, $pdoe));
        }
    }

    return false;
}//end dbBulkInsert()

/**
 * Passed an array, table name, WHERE clause, and placeholder parameters, it attempts to update a record.
 * Returns the number of affected rows
 *
 * @param  array  $data
 * @param  string  $table
 * @param  string  $where
 * @param  array  $parameters
 * @return bool|int
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent#inserting-and-updating-models
 * @see https://laravel.com/docs/eloquent#inserting-and-updating-models
 */
function dbUpdate($data, $table, $where = null, $parameters = [])
{
    // need field name and placeholder value
    // but how merge these field placeholders with actual $parameters array for the WHERE clause
    $sql = 'UPDATE `' . $table . '` set ';
    foreach ($data as $key => $value) {
        $sql .= '`' . $key . '`=';
        if (is_array($value)) {
            $sql .= reset($value);
            unset($data[$key]);
        } else {
            $sql .= '?';
        }
        $sql .= ',';
    }

    // strip keys
    $data = array_values($data);

    $sql = substr($sql, 0, -1);
    // strip off last comma
    if ($where) {
        $sql .= ' WHERE ' . $where;
        $data = array_merge($data, $parameters);
    }

    try {
        $result = Eloquent::DB()->update($sql, (array) $data);

        return $result;
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $data, $pdoe));
    }

    return false;
}//end dbUpdate()

/**
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent#deleting-models
 * @see https://laravel.com/docs/eloquent#deleting-models
 */
function dbDelete($table, $where = null, $parameters = [])
{
    $sql = 'DELETE FROM `' . $table . '`';
    if ($where) {
        $sql .= ' WHERE ' . $where;
    }

    try {
        $result = Eloquent::DB()->delete($sql, (array) $parameters);
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $parameters, $pdoe));
    }

    return $result;
}//end dbDelete()

/**
 * Delete orphaned entries from a table that no longer have a parent in parent_table
 * Format of parents array is as follows table.table_key_column<.target_key_column>
 *
 * @param  string  $target_table  The table to delete entries from
 * @param  array  $parents  an array of parent tables to check.
 * @return bool|int
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent#deleting-models
 * @see https://laravel.com/docs/eloquent#deleting-models
 */
function dbDeleteOrphans($target_table, $parents)
{
    if (empty($parents)) {
        // don't delete all entries if parents is missing
        return false;
    }

    $target_table = $target_table;
    $sql = "DELETE T FROM `$target_table` T";
    $where = [];

    foreach ((array) $parents as $parent) {
        $parent_parts = explode('.', (string) $parent);
        if (count($parent_parts) == 2) {
            [$parent_table, $parent_column] = $parent_parts;
            $target_column = $parent_column;
        } elseif (count($parent_parts) == 3) {
            [$parent_table, $parent_column, $target_column] = $parent_parts;
        } else {
            // invalid input
            return false;
        }

        $sql .= " LEFT JOIN `$parent_table` ON `$parent_table`.`$parent_column` = T.`$target_column`";
        $where[] = " `$parent_table`.`$parent_column` IS NULL";
    }

    $query = "$sql WHERE" . implode(' AND', $where);

    try {
        $result = Eloquent::DB()->delete($query);
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $query, [], $pdoe));
    }

    return $result;
}

/**
 * Fetches all of the rows (associatively) from the last performed query.
 * Most other retrieval functions build off this
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbFetchRows($sql, $parameters = [])
{
    try {
        $startTime = microtime(true);
        $connection = DB::connection();

        $query = $connection->getPdo()->prepare($sql);
        $query->execute((array) $parameters);
        $all = $query->fetchAll(PDO::FETCH_ASSOC);

        $executionTime = round((microtime(true) - $startTime) * 1000, 2);
        Event::dispatch(new QueryExecuted($sql, $parameters, $executionTime, $connection));

        return $all;
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $parameters, $pdoe));
    }

    return [];
}//end dbFetchRows()

/**
 * Like fetch(), accepts any number of arguments
 * The first argument is an sprintf-ready query stringTypes
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbFetchRow($sql = null, $parameters = []): ?array
{
    try {
        $startTime = microtime(true);
        $connection = DB::connection();

        $query = $connection->getPdo()->prepare($sql);
        $query->execute((array) $parameters);
        $row = $query->fetch(PDO::FETCH_ASSOC);

        $executionTime = round((microtime(true) - $startTime) * 1000, 2);
        Event::dispatch(new QueryExecuted($sql, $parameters, $executionTime, $connection));

        return $row === false ? null : $row;
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $parameters, $pdoe));
    }

    return [];
}//end dbFetchRow()

/**
 * Fetches the first call from the first row returned by the query
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbFetchCell($sql, $parameters = [])
{
    try {
        $startTime = microtime(true);
        $connection = DB::connection();

        $query = $connection->getPdo()->prepare($sql);
        $query->execute((array) $parameters);
        $value = $query->fetchColumn();

        $executionTime = round((microtime(true) - $startTime) * 1000, 2);
        Event::dispatch(new QueryExecuted($sql, $parameters, $executionTime, $connection));

        return $value === false ? null : $value;
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $parameters, $pdoe));
    }

    return null;
}//end dbFetchCell()

/**
 * This method is quite different from fetchCell(), actually
 * It fetches one cell from each row and places all the values in 1 array
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbFetchColumn($sql, $parameters = [])
{
    try {
        $startTime = microtime(true);
        $connection = DB::connection();

        $query = $connection->getPdo()->prepare($sql);
        $query->execute((array) $parameters);
        $column = $query->fetchAll(PDO::FETCH_COLUMN, 0);

        $executionTime = round((microtime(true) - $startTime) * 1000, 2);
        Event::dispatch(new QueryExecuted($sql, $parameters, $executionTime, $connection));

        return $column;
    } catch (PDOException $pdoe) {
        dbHandleException(new QueryException('dbFacile', $sql, $parameters, $pdoe));
    }

    return [];
}//end dbFetchColumn()

/**
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbHandleException(QueryException $exception)
{
    $message = $exception->getMessage();

    if ($exception->getCode() == 2002) {
        $message = 'Could not connect to database! ' . $message;
    }

    // ? bindings should already be replaced, just replace named bindings
    foreach ($exception->getBindings() as $key => $value) {
        if (is_string($key)) {
            $message = str_replace(":$key", $value, $message);
        }
    }

    $message .= $exception->getTraceAsString();

    if (Laravel::isBooted()) {
        Log::error($message);
    } else {
        c_echo('%rSQL Error!%n ');
        echo $message . PHP_EOL;
    }

    // TODO remove this
//    exit;
}

/**
 * Given a data array, this returns an array of placeholders
 * These may be question marks, or ":email" type
 *
 * @param  array  $values
 * @return array
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbPlaceHolders(&$values)
{
    $data = [];
    foreach ($values as $key => $value) {
        if (is_array($value)) {
            // array wrapped values are raw sql
            $data[] = reset($value);
            unset($values[$key]);
        } elseif (is_numeric($key)) {
            $data[] = '?';
        } else {
            $data[] = ':' . $key;
        }
    }

    return $data;
}//end dbPlaceHolders()

/**
 * Generate a string of placeholders to pass to fill in a list
 * result will look like this: (?, ?, ?, ?)
 *
 * @param  $count
 * @return string placholder list
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbGenPlaceholders($count)
{
    return '(' . implode(',', array_fill(0, $count, '?')) . ')';
}

/**
 * Synchronize a relationship to a list of related ids
 *
 * @param  string  $table
 * @param  string  $target_column  column name for the target
 * @param  int  $target  column target id
 * @param  string  $list_column  related column names
 * @param  array  $list  list of related ids
 * @return array [$inserted, $deleted]
 *
 * @deprecated Please use Eloquent instead; https://laravel.com/docs/eloquent
 * @see https://laravel.com/docs/eloquent
 */
function dbSyncRelationship($table, $target_column = null, $target = null, $list_column = null, $list = null)
{
    $inserted = 0;

    $delete_query = "`$target_column`=? AND `$list_column`";
    $delete_params = [$target];
    if (! empty($list)) {
        $delete_query .= ' NOT IN ' . dbGenPlaceholders(count($list));
        $delete_params = array_merge($delete_params, $list);
    }
    $deleted = (int) dbDelete($table, $delete_query, $delete_params);

    $db_list = dbFetchColumn("SELECT `$list_column` FROM `$table` WHERE `$target_column`=?", [$target]);
    foreach ($list as $item) {
        if (! in_array($item, $db_list)) {
            dbInsert([$target_column => $target, $list_column => $item], $table);
            $inserted++;
        }
    }

    return [$inserted, $deleted];
}
