<?php

function parse_generic_csv($generic_csv) {
    $candidate_data = [];
    if (($handle = fopen($generic_csv, "r")) !== FALSE) {
        $headers = fgetcsv($handle);
        while (($data = fgetcsv($handle)) !== FALSE) {
            $candidate = [];
            $question_no = 0;
            $is_question = false;
            foreach ($headers as $key => $value) {
                /* Override key name for questions */
                if ($value === "Verified") {
                    $is_question = false;
                }

                if (strstr($value, "candidate photo"))                  $value = "Photo";
                if (strstr($value, "In which Local Government Area"))   $value = "LGA";
                if (strstr($value, "In which Ward"))                    $value = "Ward";
                if (strstr($value, "Political Party"))                  $value = "Party";

                if ($value === "Pledge") {
                    if (strstr($data[$key], "I pledge")) $data[$key] = "Yes";
                    else $data[$key] = "No";
                }
                
                if ($value === "Photo") {
                    $candidate['photo_url'] = $data[$key];
                    $data[$key] = preg_filter("/.*id=/", "", $data[$key]);
                }

                if ($is_question) {
                    $candidate['q'.$question_no++] = $data[$key];
                } else {
                    $candidate[$value] = $data[$key];
                }

                if ($value === "Pledge") {
                    $is_question = true;
                }
            }
            $candidate_data[] = $candidate;
        }
        fclose($handle);
    } else {
        error_log('Error opening candidates file');
        exit(1);
    }

    return $candidate_data;
}

function match_lga(&$candidate_data, $lga_list) {
    foreach ($candidate_data as &$candidate) {
        /* Match user typed LGA/Ward to our database */
        $max_score = 0;
        foreach ($lga_list as $lga) {
            $aa = preg_split("/[^a-z]/", strtolower($candidate['LGA']));
            $bb = preg_split("/[^a-z]/", $lga['slug']);

            $score_sum = 0;
            foreach ($aa as $a) {
                foreach ($bb as $b) {
                    similar_text($a, $b, $score);
                    if ($score > 70) $score_sum += $score;
                    else $score_sum -= 10;
                }
            }

            if ($score_sum > $max_score) {
                $max_score = $score_sum;
                $match_lga = $lga;
            }
        }

        $max_score = 0;
        foreach ($match_lga['wardNames'] as $ward) {
            similar_text($ward, $candidate['Ward'], $score);
            if ($score > $max_score) {
                $max_score = $score;
                $match_ward = $ward;
            }
        }

        $candidate['match_lga'] = $match_lga['slug'];
        $candidate['match_ward'] = $match_ward;
    }
}