<?php

require_once("parse_generic_csv.php");

$options = getopt("", ["generic-csv:", "config-files:"]);

if (isset($options['generic-csv'])) {
    $generic_csv = $options['generic-csv'];
} else {
    error_log("Error: Missing required option '--generic-csv'.");
    exit(1);
}

if (isset($options['config-files'])) {
    $config_files = $options['config-files'];
} else {
    error_log("Error: Missing required option '--config-files'.");
    exit(1);
}

$config_files = explode(" ", $config_files);
$candidate_data = parse_generic_csv($generic_csv);

$lga_list = [];
/* Generate dictionary of LGAs and Wards */
foreach ($config_files as $config_file) {
    $config_string = file_get_contents($config_file);
    if ($config_string !== FALSE) {
        $config = json_decode($config_string, true);
    } else {
        error_log("Error opening config.json.");
        exit(1);
    }
    $config['config-file'] = $config_file;
    $lga_list[] = $config;
}

/* Calculate score for candidate */
foreach ($candidate_data as &$candidate) {
    $score = 0;

    if ($candidate['Pledge'] === "Yes") $score++;
    if ($candidate['q1'] === "Yes") $score++;
    if ($candidate['q3'] === "Yes") $score++;
    if ($candidate['q4'] === "Yes") $score++;
    if ($candidate['q7'] === "Yes") $score++;

    $candidate['Score'] = $score;
}

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;
}

/* Get picture */
foreach ($candidate_data as &$candidate) {
    $candidate['match_picture'] = "";
}

$header = ["Ward", "Candidate Name", "Rating", "Picture"];

/* Generate candidates-generic.csv */
foreach ($lga_list as $lga) {
    $lga_candidates = array_filter($candidate_data, function ($candidate) use ($lga) {
        return $candidate['match_lga'] === $lga['slug'];
    });

    if (count($lga_candidates) === 0) continue;

    $output_file = dirname($lga['config-file'])."/candidates-generic.csv";

    if (($handle = fopen($output_file, "w")) === FALSE) {
        error_log('Error opening output file');
        exit(1);
    }

    if (fputcsv($handle, $header) === FALSE) {
        error_log('Error writing headers to output file');
        exit(3);
    }

    foreach ($lga_candidates as $candidate) {
        $fields = [
            $candidate['match_ward'],
            $candidate['Name'],
            $candidate['Score'],
            $candidate['match_picture'],
        ];

        if (fputcsv($handle, $fields) === FALSE) {
            error_log('Error writing candidate to output file');
            exit(3);
        }
    }
}

exit(0);