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#ifndef WP_FORMAT_GATE_H
#define WP_FORMAT_GATE_H

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

/* Host-safe ports of the recovered format-gate / glyph-slot helpers around
 * 1000:7aa4 through 1000:7cff.  The original routines treat a BX/SI near
 * pointer as a five-byte slot, poll overlay hardware, patch video/glyph tables,
 * and adjust layout_refcount_44c6.  This module preserves the byte/word/refcount
 * semantics and reports overlay/hardware paths as booleans/counters. */

typedef struct WpFormatGateSlot {
    uint8_t selector;       /* recovered high byte used by layout_init_fmt_gate_and_refcount */
    uint8_t lead_byte;      /* slot byte at +0 / *SI in the decompiled code */
    uint16_t run_count;     /* slot word at +1 */
    int8_t age;             /* signed slot byte at +3 */
    uint8_t flags;          /* host-visible byte used by layout_word_pair_init */
    uint8_t payload_tag;    /* safe stand-in for the in_BX+5 glyph payload pointer */
} WpFormatGateSlot;

typedef struct WpFormatGateResult {
    WpFormatGateSlot old_slot;
    WpFormatGateSlot new_slot;
    uint8_t old_parser_runtime_flags;
    uint8_t new_parser_runtime_flags;
    uint8_t old_secondary_stream_flags;
    uint8_t new_secondary_stream_flags;
    uint8_t old_runtime_flags;
    uint8_t new_runtime_flags;
    int old_layout_refcount;
    int new_layout_refcount;
    uint8_t old_fmt_gate;
    uint8_t new_fmt_gate;
    uint8_t selector;
    uint8_t token;
    uint8_t glyph_request_tag;
    size_t init_calls;
    size_t slot_zeroes;
    size_t gate_reuses;
    size_t glyph_rule_calls;
    size_t glyph_load_setups;
    size_t video_patches;
    size_t overlay_polls;
    size_t aux_clears;
    size_t word_pair_inits;
    size_t display_routes;
    size_t refcount_increments;
    size_t counter_resets;
    size_t failfast_hints;
    size_t high_scratch_gates;
    size_t run_count_increments;
    size_t word_pair_flag_sets;
    size_t set_refcount_f8;
    size_t repeat_batches;
    size_t repeat_iterations_requested;
    size_t repeat_iterations_simulated;
    bool parser_busy_skip;
    bool coalesced_repeat;
    bool glyph_counter_wrapped;
    bool gate_char_refcount_path;
} WpFormatGateResult;

void wp_format_gate_slot_clear(WpFormatGateSlot *slot);
void wp_format_gate_result_clear(WpFormatGateResult *result);
void wp_format_gate_result_merge(WpFormatGateResult *dst, const WpFormatGateResult *src);

bool wp_format_gate_init_slot(WpLayoutGlobals *wl,
                              WpFormatGateSlot *slot,
                              uint8_t selector,
                              WpFormatGateResult *out_result);

bool wp_format_gate_apply_glyph_rules(WpLayoutGlobals *wl,
                                      WpFormatGateSlot *slot,
                                      WpFormatGateResult *out_result);

bool wp_format_gate_increment_refcount_if_fmt_gate(WpLayoutGlobals *wl,
                                                   WpFormatGateSlot *slot,
                                                   WpFormatGateResult *out_result);

bool wp_format_gate_aux_buffer_clear(WpLayoutGlobals *wl,
                                     WpFormatGateSlot *slot,
                                     WpFormatGateResult *out_result);

bool wp_format_gate_word_pair_init(WpLayoutGlobals *wl,
                                   WpFormatGateSlot *slot,
                                   WpFormatGateResult *out_result);

bool wp_format_gate_display_string_or_status(WpLayoutGlobals *wl,
                                             WpFormatGateSlot *slot,
                                             uint8_t token,
                                             WpFormatGateResult *out_result);

bool wp_format_gate_repeat_batch(WpLayoutGlobals *wl,
                                 WpFormatGateSlot *slot,
                                 size_t iterations,
                                 size_t simulation_limit,
                                 WpFormatGateResult *out_result);

#endif
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