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#ifndef WP_NESTED_STREAM_H
#define WP_NESTED_STREAM_H

#include "wp_record_parser.h"
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

#define WP_NESTED_STREAM_DEFAULT_MAX_DEPTH 4U

typedef struct WpNestedStreamOptions {
    unsigned max_depth;          /* Inclusive recursion depth. 0 => default. */
    bool follow_nested_hints;    /* Recursively parse nested hints inside nested streams. */
} WpNestedStreamOptions;

typedef struct WpNestedStreamStats {
    size_t streams_seen;
    size_t records_seen;
    size_t bytes_consumed;
    size_t char_records;
    size_t single_byte_codes;
    size_t fixed_length_codes;
    size_t variable_length_codes;
    size_t incomplete_records;
    size_t mismatched_trailers;
    size_t ascii_control_records;
    size_t printable_text_records;
    size_t single_byte_format_records;
    size_t packet_records;
    size_t line_break_records;
    size_t page_break_records;
    size_t hard_returns;
    size_t soft_returns;
    size_t hard_pages;
    size_t soft_pages;
    size_t tabs;
    size_t indents;
    size_t dormant_returns;
    size_t dormant_pages;
    size_t normalized_spaces;
    size_t normalized_hyphens;
    size_t whitespace_gate_records;
    size_t render_dirty_gate_records;
    size_t dirty_exempt_records;
    size_t dirty_neutral_records;
    size_t extension_scan_stop_records;
    size_t tsm_highlight_records;
    size_t hyphenation_suppression_records;
    size_t hidden_function_gate_records;
    size_t unknown_single_byte_records;
    size_t display_columns;
    size_t fixed_known_packets;
    size_t fixed_unknown_packets;
    size_t fixed_mirrored_packets;
    size_t fixed_zero_payload_packets;
    size_t extended_character_packets;
    size_t attribute_begin_packets;
    size_t attribute_end_packets;
    size_t d4_layout_state_records;
    size_t d4_layout_state_payload_bytes;
    size_t d4_pending_span_records;
    size_t d4_line_window_records;
    size_t d4_line_window_extension_bytes;
    size_t d4_line_metric_records;
    size_t d4_line_metric_extension_bytes;
    size_t d4_extension_fragment_records;
    size_t d4_extension_fragment_bytes;
    size_t d4_line_build_checkpoint_records;
    size_t d4_word_pair_checkpoint_records;
    size_t d4_position_marker_records;
    size_t d4_control_word_records;
    size_t d4_compact_metric_records;
    size_t d4_layout_anchor_records;
    size_t d4_unknown_records;
    size_t d4_unknown_payload_bytes;
    size_t d4_trailing_unparsed_bytes;
    size_t d4_extension_block_records;
    size_t d4_extension_block_bytes;
    size_t variable_structural_packets;
    size_t variable_generic_packets;
    size_t d1_definition_packets;
    size_t d2_outline_packets;
    size_t d3_generated_text_packets;
    size_t repeat_group_packets;
    size_t delayed_text_packets;
    size_t box_object_packets;
    size_t table_layout_packets;
    size_t system_command_packets;
    size_t variable_nested_stream_hints;
    size_t variable_repeat_dispatch_packets;
    size_t variable_repeat_total;
    size_t variable_extension_scan_packets;
    size_t variable_refcount_increment_packets;
    size_t variable_refcount_decrement_packets;
    size_t scanner_bypass_packets;
    unsigned max_depth_seen;
    bool recursion_limit_hit;
    bool allocation_failed;
    bool stopped_on_parse_gap;
} WpNestedStreamStats;

void wp_nested_stream_default_options(WpNestedStreamOptions *options);
void wp_nested_stream_stats_clear(WpNestedStreamStats *stats);
void wp_nested_stream_stats_merge(WpNestedStreamStats *dst,
                                  const WpNestedStreamStats *src);

bool wp_nested_stream_analyze_payload(const uint8_t *payload,
                                      uint16_t payload_length,
                                      uint16_t nested_offset,
                                      const WpNestedStreamOptions *options,
                                      WpNestedStreamStats *stats);

bool wp_nested_stream_analyze_record(const WpRecord *record,
                                     const WpNestedStreamOptions *options,
                                     WpNestedStreamStats *stats);

#endif
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