#pragma once
// platform.h — GUI windowing, input, and system services
//
// Provides window creation, keyboard/mouse input, clipboard access,
// and process spawning. Implementation: platform_win32.c.

#include "base/base_core.h"
#include "base/base_math.h"

////////////////////////////////
// Key codes (matching Windows VK codes)

enum {
    PKEY_BACKSPACE = 0x08,
    PKEY_TAB       = 0x09,
    PKEY_RETURN    = 0x0D,
    PKEY_ESCAPE    = 0x1B,
    PKEY_PAGEUP    = 0x21,
    PKEY_PAGEDOWN  = 0x22,
    PKEY_END       = 0x23,
    PKEY_HOME      = 0x24,
    PKEY_LEFT      = 0x25,
    PKEY_UP        = 0x26,
    PKEY_RIGHT     = 0x27,
    PKEY_DOWN      = 0x28,
    PKEY_DELETE    = 0x2E,
    PKEY_0         = 0x30,
    PKEY_1         = 0x31,
    PKEY_2         = 0x32,
    PKEY_3         = 0x33,
    PKEY_A         = 0x41,
    PKEY_B         = 0x42,
    PKEY_C         = 0x43,
    PKEY_E         = 0x45,
    PKEY_F         = 0x46,
    PKEY_G         = 0x47,
    PKEY_H         = 0x48,
    PKEY_J         = 0x4A,
    PKEY_K         = 0x4B,
    PKEY_L         = 0x4C,
    PKEY_N         = 0x4E,
    PKEY_O         = 0x4F,
    PKEY_P         = 0x50,
    PKEY_Q         = 0x51,
    PKEY_S         = 0x53,
    PKEY_V         = 0x56,
    PKEY_W         = 0x57,
    PKEY_X         = 0x58,
    PKEY_Y         = 0x59,
    PKEY_Z         = 0x5A,
    PKEY_F4        = 0x73,
    PKEY_F8        = 0x77,
    PKEY_EQUAL     = 0xBB,
    PKEY_MINUS     = 0xBD,
    PKEY_BACKSLASH = 0xDC,
};

////////////////////////////////
// Input accumulated per frame

#define PLATFORM_MAX_CHARS_PER_FRAME 64
#define PLATFORM_MAX_KEYS_PER_FRAME  32

// Editor-facing input (ASCII chars + key codes + modifiers)
typedef struct PlatformInput {
    char chars[PLATFORM_MAX_CHARS_PER_FRAME];
    S32  char_count;

    U8  keys[PLATFORM_MAX_KEYS_PER_FRAME];
    S32  key_count;

    B32  ctrl_held;
    B32  shift_held;
    B32  alt_held;
} PlatformInput;

// Raw windowing input (UTF-16 chars + VK codes + mouse)
typedef struct PlatformRawInput {
    U16      chars[PLATFORM_MAX_CHARS_PER_FRAME];
    S32      char_count;
    U8       keys[PLATFORM_MAX_KEYS_PER_FRAME];
    S32      key_count;
    B32      ctrl_held;
    B32      shift_held;
    Vec2F32  mouse_pos;
    Vec2F32  scroll_delta;
    B32      mouse_down;
    B32      was_mouse_down;
} PlatformRawInput;

////////////////////////////////
// Window

typedef struct PlatformWindow PlatformWindow;

typedef struct PlatformWindowDesc {
    const char *title;
    S32         width;
    S32         height;
} PlatformWindowDesc;

typedef void (*PlatformFrameCallback)(void *user_data);

////////////////////////////////
// Window API

PlatformWindow *platform_create_window(PlatformWindowDesc *desc);
void            platform_destroy_window(PlatformWindow *window);
B32             platform_poll_events(PlatformWindow *window);
void            platform_get_size(PlatformWindow *window, S32 *w, S32 *h);
void           *platform_get_native_handle(PlatformWindow *window);
PlatformRawInput platform_get_input(PlatformWindow *window);
void            platform_set_frame_callback(PlatformWindow *window, PlatformFrameCallback cb, void *user_data);
F32             platform_get_dpi_scale(PlatformWindow *window);

////////////////////////////////
// Input adapter — convert raw windowing input to editor input

PlatformInput platform_adapt_input(PlatformRawInput *raw);

////////////////////////////////
// Clipboard

void        platform_clipboard_set(const char *text);
const char *platform_clipboard_get(void);

////////////////////////////////
// Process spawning

void platform_spawn_terminal(const char *command, const char *working_dir);