<?php
/**
 * ACF Compatibility Layer
 *
 * @package Airy_Frontend_Forms
 */

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

/**
 * ACF Compatibility Layer - Full Implementation
 *
 * @package Airy_Frontend_Forms
 */
class AFFCF_ACF_Compat {
	use AFFCF_Singleton;

	/**
	 * Initialize
	 */
	protected function init() {
		add_action( 'acf/init', array( $this, 'acf_initialized' ) );
	}

	/**
	 * ACF initialized hook
	 */
	public function acf_initialized() {
		// ACF is ready.
	}

	/**
	 * Get field groups for post type
	 *
	 * @param string $post_type Post type.
	 * @return array Field groups.
	 */
	public function get_field_groups_for_cpt( $post_type ) {
		if ( ! function_exists( 'acf_get_field_groups' ) ) {
			return array();
		}

		$field_groups     = acf_get_field_groups( array( 'post_type' => $post_type ) );
		$formatted_groups = array();

		foreach ( $field_groups as $group ) {
			$formatted_groups[] = array(
				'id'     => $group['key'],
				'title'  => $group['title'],
				'fields' => $this->get_fields_for_group( $group['key'] ),
			);
		}

		return $formatted_groups;
	}

	/**
	 * Get fields for group
	 *
	 * @param string $group_id Group ID/key.
	 * @return array Fields.
	 */
	public function get_fields_for_group( $group_id ) {
		if ( ! function_exists( 'acf_get_fields' ) ) {
			return array();
		}

		$fields = acf_get_fields( $group_id );
		if ( ! $fields ) {
			return array();
		}

		$formatted_fields = array();
		foreach ( $fields as $field ) {
			$formatted_field = array(
				'key'           => $field['key'],
				'name'          => $field['name'],
				'label'         => $field['label'],
				'type'          => $field['type'],
				'required'      => $field['required'] ?? false,
				'instructions'  => $field['instructions'] ?? '',
				'default_value' => $field['default_value'] ?? '',
				'placeholder'   => $field['placeholder'] ?? '',
				'choices'       => $field['choices'] ?? array(),
				'rows'          => $field['rows'] ?? 5,
				'max_size'      => $field['max_size'] ?? '',
				'mime_types'    => $field['mime_types'] ?? '',
				'min'           => $field['min'] ?? '',
				'max'           => $field['max'] ?? '',
				'button_label'  => $field['button_label'] ?? '',
				'message'       => $field['message'] ?? '',
			);

			// Add post_type, multiple, allow_null for relationship fields.
			if ( in_array( $field['type'], array( 'relationship', 'post_object', 'page_link' ), true ) ) {
				// Ensure post_type is always an array.
				$post_type = $field['post_type'] ?? '';
				if ( is_string( $post_type ) ) {
					$post_type = ! empty( $post_type ) ? array( $post_type ) : array( 'post' );
				} elseif ( ! is_array( $post_type ) ) {
					$post_type = array( 'post' );
				}

				$formatted_field['post_type']  = $post_type;
				$formatted_field['multiple']   = $field['multiple'] ?? false;
				$formatted_field['allow_null'] = $field['allow_null'] ?? true;
			}

			// Add sub_fields for repeater and group.
			if ( in_array( $field['type'], array( 'repeater', 'group' ), true ) ) {
				// For group/repeater fields, ACF might not include sub_fields in the main field array.
				// We need to explicitly fetch them using acf_get_field for the complete field data.
				if ( empty( $field['sub_fields'] ) ) {
					// Try to get the full field data which includes sub_fields.
					if ( function_exists( 'acf_get_field' ) && ! empty( $field['key'] ) ) {
						$full_field = acf_get_field( $field['key'] );
						if ( ! empty( $full_field['sub_fields'] ) ) {
							$field['sub_fields'] = $full_field['sub_fields'];
						}
					}
				}

				// Now format the sub-fields if we have them.
				if ( ! empty( $field['sub_fields'] ) ) {
					$formatted_field['sub_fields'] = $this->format_sub_fields( $field['sub_fields'] );
				}
			}

			// Add layouts for flexible_content.
			if ( 'flexible_content' === $field['type'] ) {
				// Get layouts from field.
				if ( empty( $field['layouts'] ) ) {
					// Try to get the full field data.
					if ( function_exists( 'acf_get_field' ) && ! empty( $field['key'] ) ) {
						$full_field = acf_get_field( $field['key'] );
						if ( ! empty( $full_field['layouts'] ) ) {
							$field['layouts'] = $full_field['layouts'];
						}
					}
				}

				if ( ! empty( $field['layouts'] ) ) {
					$formatted_field['layouts'] = $this->format_flexible_layouts( $field['layouts'] );
				}

				$formatted_field['button_label'] = $field['button_label'] ?? __( 'Add Row', 'airy-frontend-forms' );
				$formatted_field['min']          = $field['min'] ?? 0;
				$formatted_field['max']          = $field['max'] ?? 0;
			}

			// Add taxonomy field properties.
			if ( 'taxonomy' === $field['type'] ) {
				$formatted_field['taxonomy']      = $field['taxonomy'] ?? 'category';
				$formatted_field['field_type']    = $field['field_type'] ?? 'checkbox';
				$formatted_field['allow_null']    = $field['allow_null'] ?? true;
				$formatted_field['add_term']      = $field['add_term'] ?? false;
				$formatted_field['save_terms']    = $field['save_terms'] ?? false;
				$formatted_field['load_terms']    = $field['load_terms'] ?? false;
				$formatted_field['return_format'] = $field['return_format'] ?? 'id';
			}

			// Add user field properties.
			if ( 'user' === $field['type'] ) {
				$formatted_field['role']       = $field['role'] ?? '';
				$formatted_field['multiple']   = $field['multiple'] ?? false;
				$formatted_field['allow_null'] = $field['allow_null'] ?? true;
			}

			// Add link field properties.
			if ( 'link' === $field['type'] ) {
				$formatted_field['return_format'] = $field['return_format'] ?? 'array';
			}

			// Add nav_menu field properties.
			if ( 'nav_menu' === $field['type'] ) {
				$formatted_field['allow_null']    = $field['allow_null'] ?? true;
				$formatted_field['return_format'] = $field['return_format'] ?? 'id';
			}

			// Add google_map field properties.
			if ( 'google_map' === $field['type'] ) {
				$formatted_field['center_lat'] = $field['center_lat'] ?? '';
				$formatted_field['center_lng'] = $field['center_lng'] ?? '';
				$formatted_field['zoom']       = $field['zoom'] ?? 14;
				$formatted_field['height']     = $field['height'] ?? 400;
			}

			// Add clone field properties.
			if ( 'clone' === $field['type'] ) {
				// Clone fields copy other fields - get the sub_fields.
				if ( empty( $field['sub_fields'] ) && function_exists( 'acf_get_field' ) && ! empty( $field['key'] ) ) {
					$full_field = acf_get_field( $field['key'] );
					if ( ! empty( $full_field['sub_fields'] ) ) {
						$field['sub_fields'] = $full_field['sub_fields'];
					}
				}
				if ( ! empty( $field['sub_fields'] ) ) {
					$formatted_field['sub_fields'] = $this->format_sub_fields( $field['sub_fields'] );
				}
				$formatted_field['clone']        = $field['clone'] ?? array();
				$formatted_field['display']      = $field['display'] ?? 'seamless';
				$formatted_field['prefix_label'] = $field['prefix_label'] ?? false;
				$formatted_field['prefix_name']  = $field['prefix_name'] ?? false;
			}

			// Add range field properties.
			if ( 'range' === $field['type'] ) {
				$formatted_field['min']     = $field['min'] ?? 0;
				$formatted_field['max']     = $field['max'] ?? 100;
				$formatted_field['step']    = $field['step'] ?? 1;
				$formatted_field['prepend'] = $field['prepend'] ?? '';
				$formatted_field['append']  = $field['append'] ?? '';
			}

			// Add accordion field properties.
			if ( 'accordion' === $field['type'] ) {
				$formatted_field['open']         = $field['open'] ?? false;
				$formatted_field['multi_expand'] = $field['multi_expand'] ?? false;
				$formatted_field['endpoint']     = $field['endpoint'] ?? false;
			}

			// Add tab field properties.
			if ( 'tab' === $field['type'] ) {
				$formatted_field['placement'] = $field['placement'] ?? 'top';
				$formatted_field['endpoint']  = $field['endpoint'] ?? false;
			}

			$formatted_fields[] = $formatted_field;
		}

		return $formatted_fields;
	}

	/**
	 * Format sub-fields (recursive for nested groups)
	 *
	 * @param array $sub_fields Sub-fields array.
	 * @return array Formatted sub-fields.
	 */
	private function format_sub_fields( $sub_fields ) {
		$formatted = array();

		foreach ( $sub_fields as $field ) {
			$formatted_field = array(
				'key'           => $field['key'],
				'name'          => $field['name'],
				'label'         => $field['label'],
				'type'          => $field['type'],
				'required'      => $field['required'] ?? false,
				'instructions'  => $field['instructions'] ?? '',
				'default_value' => $field['default_value'] ?? '',
				'placeholder'   => $field['placeholder'] ?? '',
				'choices'       => $field['choices'] ?? array(),
				'rows'          => $field['rows'] ?? 5,
				'message'       => $field['message'] ?? '',
				'min'           => $field['min'] ?? '',
				'max'           => $field['max'] ?? '',
			);

			// Handle nested groups recursively.
			if ( 'group' === $field['type'] ) {
				// Try to get sub-fields if not present using acf_get_field for full field data.
				if ( empty( $field['sub_fields'] ) && function_exists( 'acf_get_field' ) && ! empty( $field['key'] ) ) {
					$full_field = acf_get_field( $field['key'] );
					if ( ! empty( $full_field['sub_fields'] ) ) {
						$field['sub_fields'] = $full_field['sub_fields'];
					}
				}
				if ( ! empty( $field['sub_fields'] ) ) {
					$formatted_field['sub_fields'] = $this->format_sub_fields( $field['sub_fields'] );
				}
			}

			// Handle repeaters inside groups/repeaters.
			if ( 'repeater' === $field['type'] ) {
				// Try to get sub-fields if not present using acf_get_field for full field data.
				if ( empty( $field['sub_fields'] ) && function_exists( 'acf_get_field' ) && ! empty( $field['key'] ) ) {
					$full_field = acf_get_field( $field['key'] );
					if ( ! empty( $full_field['sub_fields'] ) ) {
						$field['sub_fields'] = $full_field['sub_fields'];
					}
				}
				if ( ! empty( $field['sub_fields'] ) ) {
					$formatted_field['sub_fields'] = $this->format_sub_fields( $field['sub_fields'] );
				}
				$formatted_field['button_label'] = $field['button_label'] ?? __( 'Add Row', 'airy-frontend-forms' );
				$formatted_field['min']          = $field['min'] ?? 0;
				$formatted_field['max']          = $field['max'] ?? 0;
			}

			// Handle flexible_content inside groups/repeaters.
			if ( 'flexible_content' === $field['type'] ) {
				if ( empty( $field['layouts'] ) && function_exists( 'acf_get_field' ) && ! empty( $field['key'] ) ) {
					$full_field = acf_get_field( $field['key'] );
					if ( ! empty( $full_field['layouts'] ) ) {
						$field['layouts'] = $full_field['layouts'];
					}
				}
				if ( ! empty( $field['layouts'] ) ) {
					$formatted_field['layouts'] = $this->format_flexible_layouts( $field['layouts'] );
				}
				$formatted_field['button_label'] = $field['button_label'] ?? __( 'Add Row', 'airy-frontend-forms' );
				$formatted_field['min']          = $field['min'] ?? 0;
				$formatted_field['max']          = $field['max'] ?? 0;
			}

			// Taxonomy field properties.
			if ( 'taxonomy' === $field['type'] ) {
				$formatted_field['taxonomy']   = $field['taxonomy'] ?? 'category';
				$formatted_field['field_type'] = $field['field_type'] ?? 'select';
				$formatted_field['allow_null'] = $field['allow_null'] ?? true;
			}

			// User field properties.
			if ( 'user' === $field['type'] ) {
				$formatted_field['role']       = $field['role'] ?? '';
				$formatted_field['multiple']   = $field['multiple'] ?? false;
				$formatted_field['allow_null'] = $field['allow_null'] ?? true;
			}

			// Relationship/post_object/page_link field properties.
			if ( in_array( $field['type'], array( 'relationship', 'post_object', 'page_link' ), true ) ) {
				$post_type = $field['post_type'] ?? array( 'post' );
				if ( is_string( $post_type ) ) {
					$post_type = ! empty( $post_type ) ? array( $post_type ) : array( 'post' );
				}
				$formatted_field['post_type']  = $post_type;
				$formatted_field['multiple']   = $field['multiple'] ?? ( 'relationship' === $field['type'] );
				$formatted_field['allow_null'] = $field['allow_null'] ?? true;
			}

			// Link field properties.
			if ( 'link' === $field['type'] ) {
				$formatted_field['return_format'] = $field['return_format'] ?? 'array';
			}

			// Google map field properties.
			if ( 'google_map' === $field['type'] ) {
				$formatted_field['center_lat'] = $field['center_lat'] ?? '';
				$formatted_field['center_lng'] = $field['center_lng'] ?? '';
				$formatted_field['zoom']       = $field['zoom'] ?? 14;
				$formatted_field['height']     = $field['height'] ?? 400;
			}

			// Clone field properties.
			if ( 'clone' === $field['type'] ) {
				if ( empty( $field['sub_fields'] ) && function_exists( 'acf_get_field' ) && ! empty( $field['key'] ) ) {
					$full_field = acf_get_field( $field['key'] );
					if ( ! empty( $full_field['sub_fields'] ) ) {
						$field['sub_fields'] = $full_field['sub_fields'];
					}
				}
				if ( ! empty( $field['sub_fields'] ) ) {
					$formatted_field['sub_fields'] = $this->format_sub_fields( $field['sub_fields'] );
				}
				$formatted_field['clone']        = $field['clone'] ?? array();
				$formatted_field['display']      = $field['display'] ?? 'seamless';
				$formatted_field['prefix_label'] = $field['prefix_label'] ?? false;
				$formatted_field['prefix_name']  = $field['prefix_name'] ?? false;
			}

			// Range field properties.
			if ( 'range' === $field['type'] ) {
				$formatted_field['min']     = $field['min'] ?? 0;
				$formatted_field['max']     = $field['max'] ?? 100;
				$formatted_field['step']    = $field['step'] ?? 1;
				$formatted_field['prepend'] = $field['prepend'] ?? '';
				$formatted_field['append']  = $field['append'] ?? '';
			}

			// Nav menu field properties.
			if ( 'nav_menu' === $field['type'] ) {
				$formatted_field['allow_null']    = $field['allow_null'] ?? true;
				$formatted_field['return_format'] = $field['return_format'] ?? 'id';
			}

			// Icon picker field properties.
			if ( 'icon_picker' === $field['type'] ) {
				$formatted_field['return_format'] = $field['return_format'] ?? 'string';
			}

			// Accordion field properties.
			if ( 'accordion' === $field['type'] ) {
				$formatted_field['open']         = $field['open'] ?? false;
				$formatted_field['multi_expand'] = $field['multi_expand'] ?? false;
				$formatted_field['endpoint']     = $field['endpoint'] ?? false;
			}

			// Tab field properties.
			if ( 'tab' === $field['type'] ) {
				$formatted_field['placement'] = $field['placement'] ?? 'top';
				$formatted_field['endpoint']  = $field['endpoint'] ?? false;
			}

			$formatted[] = $formatted_field;
		}

		return $formatted;
	}

	/**
	 * Format flexible content layouts
	 *
	 * @param array $layouts Layouts array.
	 * @return array Formatted layouts.
	 */
	private function format_flexible_layouts( $layouts ) {
		$formatted = array();

		foreach ( $layouts as $layout ) {
			$formatted_layout = array(
				'key'   => $layout['key'] ?? '',
				'name'  => $layout['name'] ?? '',
				'label' => $layout['label'] ?? $layout['name'] ?? '',
				'min'   => $layout['min'] ?? '',
				'max'   => $layout['max'] ?? '',
			);

			// Try to get sub-fields if not present in layout data.
			if ( empty( $layout['sub_fields'] ) && function_exists( 'acf_get_fields' ) && ! empty( $layout['key'] ) ) {
				$layout_sub_fields = acf_get_fields( $layout['key'] );
				if ( ! empty( $layout_sub_fields ) ) {
					$layout['sub_fields'] = $layout_sub_fields;
				}
			}

			// Format sub-fields for the layout.
			if ( ! empty( $layout['sub_fields'] ) ) {
				$formatted_layout['sub_fields'] = $this->format_sub_fields( $layout['sub_fields'] );
			} else {
				$formatted_layout['sub_fields'] = array();
			}

			$formatted[] = $formatted_layout;
		}

		return $formatted;
	}

	/**
	 * Get field
	 *
	 * @param string $field_key Field key.
	 * @return array|null.
	 */
	public function get_field( $field_key ) {
		if ( ! function_exists( 'acf_get_field' ) ) {
			return null;
		}
		return acf_get_field( $field_key );
	}

	/**
	 * Update field value
	 *
	 * @param string $field_key Field key.
	 * @param mixed  $value     Value.
	 * @param int    $post_id   Post ID.
	 * @return bool.
	 */
	public function update_field( $field_key, $value, $post_id ) {
		if ( ! function_exists( 'update_field' ) ) {
			return false;
		}
		return update_field( $field_key, $value, $post_id );
	}

	/**
	 * Get field value
	 *
	 * @param string $field_key Field key.
	 * @param int    $post_id   Post ID.
	 * @return mixed.
	 */
	public function get_field_value( $field_key, $post_id ) {

		if ( ! function_exists( 'get_field' ) ) {
			return null;
		}

		$value = get_field( $field_key, $post_id );

		return $value;
	}

	/**
	 * Get ACF version
	 *
	 * @return string|null.
	 */
	public function get_version() {
		if ( defined( 'ACF_VERSION' ) ) {
			return ACF_VERSION;
		}
		if ( function_exists( 'acf_get_setting' ) ) {
			return acf_get_setting( 'version' );
		}
		return null;
	}
}