<?php
namespace JVBase\meta;

if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly
}

/**
 * Handles meta value sanitization
 */
class Sanitizer
{

	public static function sanitize(mixed $value, array $field_config): mixed
	{
		$callback = static::getCallback($field_config);

		if (is_array($callback)) {
			return call_user_func([static::class, $callback[1]], $value, $field_config);
		}
		if (method_exists(static::class, $callback)) {
			return static::$callback($value, $field_config);
		}

		return call_user_func($callback, $value);
	}

    public static function getCallback(array $field_config):mixed
    {
        return $field_config['sanitize'] ??
           MetaTypeManager::getSanitizeCallback($field_config['type']);
    }

    protected static function sanitizeTaxonomy(string $values, array $field_config):string
    {
		$values = array_map('absint', explode(',', $values));

        // Ensure taxonomy starts with BASE
        $taxonomy = (str_starts_with($field_config['taxonomy'], BASE))
            ? $field_config['taxonomy']
            : BASE . $field_config['taxonomy'];

        $values = array_filter($values, fn($value) => term_exists((int)$value, $taxonomy));

        return implode(',', $values);
    }

    protected static function sanitizeUser(string $values, array $field_config):string
    {
		$values = array_map('absint', explode(',', $values));

        $values = array_filter($values, fn($value) => (bool)get_userdata((int)$value));

        return implode(',', $values);
    }

	protected static function sanitizePost(string $values, array $config):string
	{
		$values = array_map('absint', explode(',', $values));
		return implode(',', array_filter($values, fn($value) => (bool)get_post((int)$value)));
	}

	protected static function sanitizeTagList(array $values, array $field_config): array
	{
		if (empty(array_filter($values, fn($value) => !empty($value)))) {
			return [];
		}

		if (!isset($field_config['fields']) || !is_array($field_config['fields'])) {
			return [];
		}

		$sanitized = [];

		foreach ($values as $row) {
			if (!is_array($row)) {
				continue;
			}

			// Clean up field names (remove prefixes like "fieldname:0:email")
			$temp = [];
			foreach ($row as $key => $value) {
				$key_parts = explode(':', $key);
				$clean_key = $key_parts[array_key_last($key_parts)];
				$temp[$clean_key] = $value;
			}
			$row = $temp;

			// Sanitize each field
			$clean_row = [];
			foreach ($field_config['fields'] as $key => $subfield_config) {
				if (!array_key_exists($key, $row)) {
					continue;
				}

				$subfield_config['name'] = $key; // For backwards compatibility
				$clean_row[$key] = static::sanitize($row[$key], $subfield_config);
			}

			// Only add row if it has at least one non-empty value
			if (!empty(array_filter($clean_row))) {
				$sanitized[] = $clean_row;
			}
		}

		return $sanitized;
	}

    protected static function sanitizeRepeater(array $values, array $field_config):array
    {
        if (empty(array_filter($values, fn($value) => !empty($value)))) {
            return [];
        }


        $sanitized = [];
        foreach ($values as $row) {
            if (!is_array($row)) {
                continue;
            }
            $temp = [];
            foreach ($row as $key => $value) {
                $key = explode(':', $key);
                $temp[$key[array_key_last($key)]] = $value;
            }
            $row = $temp;

            $clean_row = [];
            foreach ($field_config['fields'] as $key => $subfield_config) {
                if (!array_key_exists($key, $row)) {
                    continue;
                }
                $subfield_config['name'] = $key;//For backwards compatability
                $clean_row[$key] = static::sanitize($row[$key], $subfield_config);
            }
            $sanitized[] = $clean_row;
        }

        return $sanitized;
    }

	protected static function sanitizeGroup(array|string $values, array $field_config):array
	{
		if (!is_array($values)) {
			return [];
		}

		if (!isset($field_config['fields']) || !is_array($field_config['fields'])) {
			return [];
		}

		// Remove group: prefix from keys if present
		$clean_values = [];
		foreach ($values as $key => $value) {
			$key_parts = explode(':', $key);
			$clean_key = $key_parts[array_key_last($key_parts)];
			$clean_values[$clean_key] = $value;
		}

		$sanitized = [];
		foreach ($field_config['fields'] as $key => $subfield_config) {
			if (!array_key_exists($key, $clean_values)) {
				// Use default value if not provided
				$default = MetaTypeManager::getType($subfield_config['type'])['default'] ?? '';
				$sanitized[$key] = $default;
				continue;
			}

			$subfield_config['name'] = $key; // For backwards compatibility
			$sanitized[$key] = static::sanitize($clean_values[$key], $subfield_config);
		}

		return $sanitized;
	}

	protected static function sanitizeSelector(string $value, array $config):string
	{
		if (array_key_exists('type', $config)) {
			return match ($config['type']) {
				'user' => self::sanitizeUser($value, $config),
				'taxonomy'=> self::sanitizeTaxonomy($value, $config),
				'post'	=> self::sanitizePost($value, $config),
			};
		}
		return implode(',',array_map('absint', explode(',',$value)));
	}

    protected static function sanitizeUpload(array|string $value):string
    {
        if (empty($value)) {
            return '';
        }

        // Split value into array if it's a string
        $ids = is_array($value) ? $value : explode(',', $value);

        // Filter and validate each ID
        $valid_ids = array_filter($ids, function ($id) {
            $id = absint($id);
            // Verify this is a valid attachment
            return $id > 0 && wp_attachment_is_image($id);
        });
        return implode(',', $valid_ids);
    }

    protected static function sanitizeLocation(array $value, array $field_config):array
    {
		error_log('Location field to sanitize: '.print_r($value, true));
        return [
            'address' => sanitize_text_field($value['address'] ?? ''),
            'lat' => (float)($value['lat'] ?? 0),
            'lng' => (float)($value['lng'] ?? 0),
            // Address components
            'street' => sanitize_text_field($value['street'] ?? ''),
            'city' => sanitize_text_field($value['city'] ?? ''),
            'province' => sanitize_text_field($value['province'] ?? ''),
            'postal_code' => sanitize_text_field($value['postal_code'] ?? ''),
            'country' => sanitize_text_field($value['country'] ?? '')
        ];
    }

    protected static function sanitizeOptions(array|string $value, array $field_config):string
    {
        error_log('Sanitizing options: '.print_r($value, true));
        if (!isset($field_config['options'])) {
            return '';
        }
        if (!is_array($value)) {
            $value = array_map('trim', explode(',', $value));
        }
        return implode(',', array_intersect($value, array_keys($field_config['options'])));
    }

    protected static function sanitizeDate(string $value, array $field_config):string
    {
        $timestamp = strtotime($value);
        return $timestamp ? date('Y-m-d', $timestamp) : '';
    }

	protected static function sanitizeDateTime(string $value, array $field_config): string
	{
		if (empty($value)) {
			return '';
		}

		$timestamp = strtotime($value);
		if (!$timestamp) {
			return '';
		}

		// Return in MySQL datetime format
		return date('Y-m-d H:i:s', $timestamp);
	}

    protected static function sanitizeTime(string $value, array $field_config):string
    {
        // Remove any whitespace
        $value = trim($value);

        // Convert to lowercase for consistency
        $value = strtolower($value);

        // Pattern to match various time formats
        $patterns = [
            // 10am, 2pm, etc.
            '/^(\d{1,2})(am|pm)$/' => function ($matches) {
                $hour = (int)$matches[1];
                if ($matches[2] === 'pm' && $hour < 12) {
                    $hour += 12;
                } elseif ($matches[2] === 'am' && $hour === 12) {
                    $hour = 0;
                }
                return sprintf('%02d:00', $hour);
            },

            // 10:30am, 2:15pm, etc.
            '/^(\d{1,2}):(\d{2})(am|pm)$/' => function ($matches) {
                $hour = (int)$matches[1];
                $minute = (int)$matches[2];
                if ($matches[3] === 'pm' && $hour < 12) {
                    $hour += 12;
                } elseif ($matches[3] === 'am' && $hour === 12) {
                    $hour = 0;
                }
                return sprintf('%02d:%02d', $hour, $minute);
            },

            // 14:30, 09:45, etc. (24-hour format)
            '/^(\d{1,2}):(\d{2})$/' => function ($matches) {
                $hour = (int)$matches[1];
                $minute = (int)$matches[2];
                return sprintf('%02d:%02d', $hour, $minute);
            },

            // Just hours like "14", "9" (assuming 24-hour and whole hours)
            '/^(\d{1,2})$/' => function ($matches) {
                $hour = (int)$matches[1];
                return sprintf('%02d:00', $hour);
            }
        ];

        // Try each pattern
        foreach ($patterns as $pattern => $callback) {
            if (preg_match($pattern, $value, $matches)) {
                $time = $callback($matches);

                // Validate the resulting time
                $hour = (int)substr($time, 0, 2);
                $minute = (int)substr($time, 3, 2);

                if ($hour >= 0 && $hour <= 23 && $minute >= 0 && $minute <= 59) {
                    return $time; // Valid time in HH:MM format
                }
            }
        }

        // If no pattern matched or time was invalid
        return '';
    }

	public static function sanitizeFloat(string $value, array $config):float
	{
			if (is_numeric($value)) {
				return (float) $value;
			}
			return 0.0;
	}

	public static function sanitizePhone(string|int $value, array $config = []):string
	{
		$digits = preg_replace('/\D/', '', (string) $value);

		$length = strlen($digits);

		if ($length < 10 || $length > 13) { // 13 = 3-digit country code + 10
			return '';
		}

		$countryCode = $length > 10 ? substr($digits, 0, $length - 10) : null;
		$number = substr($digits, -10);

		$formatted = preg_replace('/(\d{3})(\d{3})(\d{4})/', '$1-$2-$3', $number);

		return $countryCode ? '+' . $countryCode . '-' . $formatted : $formatted;
	}
}