<?php

namespace App\Support;

use Carbon\Carbon;
use Illuminate\Database\QueryException;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Symfony\Component\Yaml\Yaml;

class Database
{
    /**
     * @return string
     */
    protected static function time(): string
    {
        return Carbon::now('UTC');
    }

    /**
     * @param      $yaml_file
     * @param bool $ignore_errors
     *
     * @throws \Exception
     *
     * @return array
     */
    public static function seed_from_yaml_file($yaml_file, $ignore_errors = false): array
    {
        $yml = file_get_contents($yaml_file);
        return static::seed_from_yaml($yml, $ignore_errors);
    }

    /**
     * @param      $yml
     * @param bool $ignore_errors
     *
     * @throws \Exception
     *
     * @return array
     */
    public static function seed_from_yaml($yml, $ignore_errors = false): array
    {
        $imported = [];
        $yml = Yaml::parse($yml);
        if (empty($yml)) {
            return $imported;
        }

        foreach ($yml as $table => $data) {
            $imported[$table] = 0;

            $id_column = 'id';
            if (array_key_exists('id_column', $data)) {
                $id_column = $data['id_column'];
            }

            $ignore_on_update = [];
            if (array_key_exists('ignore_on_update', $data)) {
                $ignore_on_update = $data['ignore_on_update'];
            }

            if (array_key_exists('data', $data)) {
                $rows = $data['data'];
            } else {
                $rows = $data;
            }

            foreach ($rows as $row) {
                try {
                    static::insert_row($table, $row, $id_column, $ignore_on_update);
                } catch (QueryException $e) {
                    if ($ignore_errors) {
                        continue;
                    }

                    throw $e;
                }

                $imported[$table]++;
            }
        }

        return $imported;
    }

    /**
     * @param string $table
     * @param array  $row
     * @param string $id_col            The ID column to use for update/insert
     * @param array  $ignore_on_updates
     * @param bool   $ignore_errors
     *
     * @return mixed
     */
    public static function insert_row(
        $table,
        $row,
        $id_col = 'id',
        $ignore_on_updates = [],
        $ignore_errors = true
    ) {
        // encrypt any password fields
        if (array_key_exists('password', $row)) {
            $row['password'] = bcrypt($row['password']);
        }

        if (empty($row)) {
            return $row;
        }

        // if any time fields are == to "now", then insert the right time
        foreach ($row as $column => $value) {
            if (strtolower($value) === 'now') {
                $row[$column] = static::time();
            }
        }

        $count = 0;
        if (array_key_exists($id_col, $row)) {
            $count = DB::table($table)->where($id_col, $row[$id_col])->count($id_col);
        }

        try {
            if ($count > 0) {
                foreach ($ignore_on_updates as $ignore_column) {
                    if (array_key_exists($ignore_column, $row)) {
                        unset($row[$ignore_column]);
                    }
                }

                DB::table($table)
                    ->where($id_col, $row[$id_col])
                    ->update($row);
            } else {
                DB::table($table)->insert($row);
            }
        } catch (QueryException $e) {
            Log::error($e);
            if (!$ignore_errors) {
                throw $e;
            }
        }

        return $row;
    }
}