// Copyright (c) Epic Games Tools
// Licensed under the MIT license (https://opensource.org/license/mit/)

#ifndef RADDBG_VIEWS_H
#define RADDBG_VIEWS_H

////////////////////////////////
//~ rjf: Code View Types

typedef U32 RD_CodeViewBuildFlags;
enum
{
  RD_CodeViewBuildFlag_Margins     = (1<<0),
  RD_CodeViewBuildFlag_All         = 0xffffffff,
};

typedef struct RD_CodeViewTLineSplitNode RD_CodeViewTLineSplitNode;
struct RD_CodeViewTLineSplitNode
{
  RD_CodeViewTLineSplitNode *next;
  U64 off;
};

typedef struct RD_CodeViewTLineWrapCacheNode RD_CodeViewTLineWrapCacheNode;
struct RD_CodeViewTLineWrapCacheNode
{
  RD_CodeViewTLineWrapCacheNode *hash_next;
  RD_CodeViewTLineWrapCacheNode *hash_prev;
  S64 line_num;
  RD_CodeViewTLineSplitNode *first_split;
  RD_CodeViewTLineSplitNode *last_split;
};

typedef struct RD_CodeViewTLineWrapCacheSlot RD_CodeViewTLineWrapCacheSlot;
struct RD_CodeViewTLineWrapCacheSlot
{
  RD_CodeViewTLineWrapCacheNode *first;
  RD_CodeViewTLineWrapCacheNode *last;
};

typedef struct RD_CodeViewState RD_CodeViewState;
struct RD_CodeViewState
{
  // rjf: stable state
  B32 initialized;
  S64 preferred_column;
  B32 drifted_for_search;
  U128 last_hash;
  
  // rjf: per-frame command info
  S64 goto_line_num;
  B32 center_cursor;
  B32 contain_cursor;
  B32 force_contain_only;
  B32 watch_expr_at_mouse;
  Arena *find_text_arena;
  String8 find_text_fwd;
  String8 find_text_bwd;
  
  // rjf: line wrapping cache & info
  Arena *wrap_arena;
  RD_CodeViewTLineWrapCacheSlot *wrap_cache_slots;
  U64 wrap_cache_slots_count;
  U64 wrap_total_vline_count;
};

typedef struct RD_CodeViewBuildResult RD_CodeViewBuildResult;
struct RD_CodeViewBuildResult
{
  DI_KeyList dbgi_keys;
};

////////////////////////////////
//~ rjf: Watch View Types

typedef enum RD_WatchCellKind
{
  RD_WatchCellKind_Eval,           // an evaluation cell
  RD_WatchCellKind_ViewUI,         // an arbitrary user interface, supplied by a hook
  RD_WatchCellKind_CallStackFrame, // a slot for a yellow arrow, to show call stack frame selection
}
RD_WatchCellKind;

typedef U32 RD_WatchCellFlags;
enum
{
  RD_WatchCellFlag_Expr                    = (1<<0),
  RD_WatchCellFlag_NoEval                  = (1<<1),
  RD_WatchCellFlag_Button                  = (1<<2),
  RD_WatchCellFlag_Background              = (1<<3),
  RD_WatchCellFlag_ActivateWithSingleClick = (1<<4),
  RD_WatchCellFlag_IsNonCode               = (1<<5),
  RD_WatchCellFlag_CanEdit                 = (1<<6),
  RD_WatchCellFlag_IsErrored               = (1<<7),
  RD_WatchCellFlag_Indented                = (1<<8),
};

typedef struct RD_WatchCell RD_WatchCell;
struct RD_WatchCell
{
  RD_WatchCell *next;
  RD_WatchCellKind kind;
  RD_WatchCellFlags flags;
  U64 index;
  E_Eval eval;
  F32 default_pct;
  F32 pct;
  F32 px;
};

typedef struct RD_WatchCellList RD_WatchCellList;
struct RD_WatchCellList
{
  RD_WatchCell *first;
  RD_WatchCell *last;
  U64 count;
  F32 pct_sum;
};

typedef struct RD_WatchRowInfo RD_WatchRowInfo;
struct RD_WatchRowInfo
{
  D_Entity *module;
  B32 can_expand;
  B32 expr_is_editable;
  String8 group_cfg_name;
  CFG_Node *group_cfg_parent;
  CFG_Node *group_cfg_child;
  D_Entity *group_entity;
  D_Entity *callstack_thread;
  U64 callstack_unwind_index;
  U64 callstack_inline_depth;
  U64 callstack_vaddr;
  String8 cell_style_key;
  RD_WatchCellList cells;
  RD_ViewUIRule *view_ui_rule;
};

typedef struct RD_WatchRowCellInfo RD_WatchRowCellInfo;
struct RD_WatchRowCellInfo
{
  RD_WatchCellFlags flags;
  CFG_Node *cfg;
  D_Entity *entity;
  String8 cmd_name;
  String8 file_path;
  DR_FStrList expr_fstrs;
  DR_FStrList eval_fstrs;
  String8 description;
  String8 error_tooltip;
  String8 inheritance_tooltip;
  RD_ViewUIRule *view_ui_rule;
};

typedef struct RD_WatchPt RD_WatchPt;
struct RD_WatchPt
{
  EV_Key parent_key;
  EV_Key key;
  U64 cell_id;
};

typedef struct RD_WatchViewTextEditState RD_WatchViewTextEditState;
struct RD_WatchViewTextEditState
{
  RD_WatchViewTextEditState *pt_hash_next;
  RD_WatchPt pt;
  TxtPt cursor;
  TxtPt mark;
  U8 input_buffer[1024];
  U64 input_size;
  U8 initial_buffer[1024];
  U64 initial_size;
};

typedef struct RD_WatchViewState RD_WatchViewState;
struct RD_WatchViewState
{
  B32 initialized;
  
  // rjf: filter history
  Arena *filter_arena;
  String8 last_filter;
  
  // rjf; table cursor state
  RD_WatchPt cursor;
  RD_WatchPt mark;
  RD_WatchPt next_cursor;
  RD_WatchPt next_mark;
  
  // rjf: text input state
  Arena *text_edit_arena;
  U64 text_edit_state_slots_count;
  RD_WatchViewTextEditState dummy_text_edit_state;
  RD_WatchViewTextEditState **text_edit_state_slots;
  B32 text_editing;
};

////////////////////////////////
//~ rjf: Code View Functions

internal void rd_code_view_init(RD_CodeViewState *cv);
internal RD_CodeViewBuildResult rd_code_view_build(Arena *arena, RD_CodeViewState *cv, RD_CodeViewBuildFlags flags, Rng2F32 rect, String8 text_data, TXT_TextInfo *text_info, DASM_LineArray *dasm_lines, Rng1U64 dasm_vaddr_range, DI_Key dasm_dbgi_key);

////////////////////////////////
//~ rjf: Watch View Functions

//- rjf: cell list building
internal U64 rd_id_from_watch_cell(RD_WatchCell *cell);
internal RD_WatchCell *rd_watch_cell_list_push_new_(Arena *arena, RD_WatchCellList *list, RD_WatchCell *params);
#define rd_watch_cell_list_push_new(arena, list, kind_, eval_, ...) rd_watch_cell_list_push_new_((arena), (list), &(RD_WatchCell){.kind = (kind_), .eval = (eval_), __VA_ARGS__})

//- rjf: watch view points <-> table coordinates
internal B32 rd_watch_pt_match(RD_WatchPt a, RD_WatchPt b);
internal RD_WatchPt rd_watch_pt_from_tbl(EV_BlockRangeList *block_ranges, Vec2S64 tbl);
internal Vec2S64 rd_tbl_from_watch_pt(EV_BlockRangeList *block_ranges, RD_WatchPt pt);

//- rjf: row -> info
internal RD_WatchRowInfo rd_watch_row_info_from_row(Arena *arena, EV_Row *row);

//- rjf: row * cell -> info
internal RD_WatchRowCellInfo rd_info_from_watch_row_cell(Arena *arena, EV_Row *row, EV_StringFlags string_flags, RD_WatchRowInfo *row_info, RD_WatchCell *cell, FNT_Tag font, F32 font_size, F32 max_size_px);

//- rjf: table coordinates -> text edit state
internal RD_WatchViewTextEditState *rd_watch_view_text_edit_state_from_pt(RD_WatchViewState *wv, RD_WatchPt pt);

////////////////////////////////
//~ rjf: View Hooks

// TODO(rjf): eliminate once we are predeclaring these with metacode

RD_VIEW_UI_FUNCTION_DEF(null);

EV_EXPAND_RULE_INFO_FUNCTION_DEF(text);
EV_EXPAND_RULE_INFO_FUNCTION_DEF(disasm);
EV_EXPAND_RULE_INFO_FUNCTION_DEF(memory);
EV_EXPAND_RULE_INFO_FUNCTION_DEF(bitmap);
EV_EXPAND_RULE_INFO_FUNCTION_DEF(color);
EV_EXPAND_RULE_INFO_FUNCTION_DEF(geo3d);

RD_VIEW_UI_FUNCTION_DEF(text);
RD_VIEW_UI_FUNCTION_DEF(disasm);
RD_VIEW_UI_FUNCTION_DEF(memory);
RD_VIEW_UI_FUNCTION_DEF(bitmap);
RD_VIEW_UI_FUNCTION_DEF(color);
RD_VIEW_UI_FUNCTION_DEF(geo3d);

#endif // RADDBG_VIEWS_H