<?php

function trim_sluggify($input) {
    return strtolower(str_replace(' ', '-', trim($input)));
}

function parse_pledge_data($candidates_files, $default_image) {
    $candidate_data = [];
    foreach ($candidates_files as $key => $file) {
        $config_file = dirname($file)."/config.json";
        $config_string = file_get_contents($config_file);
        $elected_file = dirname($file)."/candidates-elected.csv";

        if ($config_string !== FALSE) {
            $config = json_decode($config_string, true);
        } else {
            error_log("Error opening config.json.");
            exit(1);
        }

        $elected_data = [];
        if (file_exists($elected_file)) {
            if (($elected_handle = fopen($elected_file, "r")) !== FALSE) {
                $headers = fgetcsv($elected_handle);
                while (($data = fgetcsv($elected_handle)) !== FALSE) {
                    $candidate = [];
                    foreach ($headers as $key => $value) {
                        $candidate[$value] = $data[$key];
                    }
                    $name_slug = trim_sluggify($candidate['Candidate Name']);
                    $elected_data[$name_slug] = $candidate;
                }
            } else {
                error_log('Error opening candidates file');
                exit(1);
            }
        }

        if (($handle = fopen($file, "r")) !== FALSE) {
            $headers = fgetcsv($handle);
            while (($data = fgetcsv($handle)) !== FALSE) {
                $candidate = [];
                $candidate['Pledge'] = 'n';
                $candidate['Picture'] = "";
                if (is_array($default_image)) {
                    $candidate['image_url'] = $default_image['url'];
                    $candidate['image_id'] = $default_image['id'];
                } else {
                    $candidate['image_url'] = "";
                    $candidate['image_id'] = "";
                }
                foreach ($headers as $key => $value) {
                    $candidate[$value] = $data[$key];
                }
                $name_slug = trim_sluggify($candidate['Candidate Name']);
                if (array_key_exists($name_slug, $candidate_data)) {
                    if ($candidate_data[$name_slug]['Pledge'] === 'y') {
                        $candidate['Pledge'] = 'y';
                    }
                }
                if (!empty($elected_data) && array_key_exists($name_slug, $elected_data)) {
                    $candidate['Elected'] = $elected_data[$name_slug]['Elected'];
                }
                $candidate['Council'] = $config['councilName'];
                $candidate['Path'] = dirname($file);
                $media_desc = $candidate['Path']."/".
                                $candidate['Picture'].".json";
                if (file_exists($media_desc)) {
                    $media_string = file_get_contents($media_desc);
                    if ($media_string !== FALSE) {
                        $media = json_decode($media_string, true);
                    } else {
                        error_log("Error opening image descriptor.");
                        exit(1);
                    }
                    /* Get photo URL and ID */
                    $candidate['image_url'] = $media['url'];
                    $candidate['image_id'] = $media['id'];
                }
                $candidate_data[$name_slug] = $candidate;
            }
            fclose($handle);
        } else {
            error_log('Error opening candidates file');
            exit(1);
        }

        /* Override pledge columns if pledges.csv is present */
        $pledges_file = dirname($file)."/pledges.csv";
        if (!file_exists($pledges_file)) continue;

        if (($handle = fopen($pledges_file, "r")) !== FALSE) {
            $headers = fgetcsv($handle);
            while (($data = fgetcsv($handle)) !== FALSE) {
                $candidate = [];
                foreach ($headers as $key => $value) {
                    $candidate[$value] = $data[$key];
                }
                $candidate_data[trim_sluggify($candidate['Candidate Name'])]['Pledge'] = 
                    $candidate['Pledge'];
            }
            fclose($handle);
        } else {
            error_log('Error opening pledges file');
            exit(1);
        }
    }

    return $candidate_data;
}