#include "ecex.h"
#include "buffers.h"

#define C(x) ((float)(x) / 255.0f)
#define RGB(r, g, b) C(r), C(g), C(b)

/* Gruvbox dark palette */
#define GB_DARK0_HARD  RGB(0x1d, 0x20, 0x21)
#define GB_DARK0       RGB(0x28, 0x28, 0x28)
#define GB_DARK1       RGB(0x3c, 0x38, 0x36)
#define GB_DARK2       RGB(0x50, 0x49, 0x45)

#define GB_LIGHT0      RGB(0xfb, 0xf1, 0xc7)
#define GB_LIGHT1      RGB(0xeb, 0xdb, 0xb2)
#define GB_LIGHT2      RGB(0xd5, 0xc4, 0xa1)

#define GB_RED         RGB(0xfb, 0x49, 0x34)
#define GB_GREEN       RGB(0xb8, 0xbb, 0x26)
#define GB_YELLOW      RGB(0xfa, 0xbd, 0x2f)
#define GB_BLUE        RGB(0x83, 0xa5, 0x98)
#define GB_PURPLE      RGB(0xd3, 0x86, 0x9b)
#define GB_AQUA        RGB(0x8e, 0xc0, 0x7c)
#define GB_ORANGE      RGB(0xfe, 0x80, 0x19)

static int hello_command(ecex_t *ed) {
    buffer_t *buf = ecex_current_buffer(ed);
    buffer_insert(buf, "Hello from Gruvbox ecex config!\n");
    return 0;
}

static int make_notes_command(ecex_t *ed) {
    buffer_t *notes = ecex_find_buffer(ed, "*notes*");

    if (!notes) {
        notes = ecex_create_buffer(ed, "*notes*", NULL, 0);
    }

    if (notes) {
        buffer_insert(notes, "Created or reused *notes* from command.\n");
        ecex_switch_buffer(ed, "*notes*");
    }

    return 0;
}


static int demo_line_action(ecex_t *ed,
                            buffer_t *buffer,
                            size_t line,
                            const char *payload,
                            void *userdata) {
    (void)buffer;
    (void)line;
    (void)userdata;

    buffer_t *notes = ecex_find_buffer(ed, "*notes*");
    if (!notes) {
        notes = ecex_create_buffer(ed, "*notes*", NULL, 0);
    }

    if (!notes) return -1;

    ecex_switch_buffer(ed, "*notes*");
    buffer_insert(notes, payload ? payload : "selected an interactive line\n");
    return 0;
}

static int demo_interactive_command(ecex_t *ed) {
    buffer_t *menu = ecex_create_interactive_buffer(ed, "*demo-menu*");
    if (!menu) return -1;

    buffer_clear(menu);
    buffer_set_interactive(menu, 1);

    buffer_append(menu, "Demo interactive buffer\n");
    buffer_append(menu, "Move to a line and press ENTER.\n\n");

    ecex_interactive_append_line(ed,
                                 menu,
                                 "Insert hello into *notes*",
                                 demo_line_action,
                                 "hello from an interactive config buffer!\n",
                                 NULL);

    ecex_interactive_append_line(ed,
                                 menu,
                                 "Insert gruvbox note into *notes*",
                                 demo_line_action,
                                 "gruvbox menu action selected\n",
                                 NULL);

    ecex_switch_buffer(ed, "*demo-menu*");
    return 0;
}

int ecex_config_init(ecex_t *ed) {
    ecex_set_font_size(ed, 20.0f);

    ecex_set_bg_color(ed, GB_DARK0_HARD);
    ecex_set_fg_color(ed, GB_LIGHT1);

    ecex_set_status_bg_color(ed, GB_DARK0);
    ecex_set_status_fg_color(ed, GB_YELLOW);
    ecex_set_status_border_color(ed, GB_DARK1);

    ecex_set_minibuffer_bg_color(ed, GB_DARK1);
    ecex_set_minibuffer_fg_color(ed, GB_LIGHT0);

    ecex_set_completion_enabled(ed, 1);
    ecex_set_completion_fg_color(ed, GB_DARK2);

    ecex_set_interactive_highlight_bg_color(ed, GB_DARK1);
    ecex_set_interactive_highlight_fg_color(ed, GB_YELLOW);

    ecex_set_cursor_color(ed, GB_AQUA);
    ecex_set_region_bg_color(ed, GB_DARK2);

    ecex_register_command(ed, "hello", hello_command);
    ecex_register_command(ed, "make-notes", make_notes_command);
    ecex_register_command(ed, "demo-interactive", demo_interactive_command);

    ecex_bind_key(ed, "C-h", "hello");
    ecex_bind_key(ed, "C-m", "make-notes");
    ecex_bind_key(ed, "F2", "list-commands");
    ecex_bind_key(ed, "F3", "list-buffers");
    ecex_bind_key(ed, "F4", "demo-interactive");
    ecex_bind_key(ed, "C-q", "quit");
    ecex_bind_key(ed, "C-x h", "beginning-of-buffer");

    ecex_bind_key(ed, "C-x b n", "next-buffer");
    ecex_bind_key(ed, "C-x b p", "previous-buffer");

    buffer_t *scratch = ecex_current_buffer(ed);

    buffer_insert(scratch, "ecex config loaded with Gruvbox colors!\n");
    buffer_insert(scratch, "Try F1 M-x, C-x C-f, C-x C-s, F2 commands, F3 buffers, F4 demo menu, C-x b n/p.\n");
    buffer_insert(scratch, "Eval live C snippets with C-x C-e (line), C-x e r (marked region), C-x e b (buffer), C-x e f (file).\n");
    buffer_insert(scratch, "Example line to edit then C-x C-e: ecex_set_font_size(ed, 28.0f);\n");
    buffer_insert(scratch, "Example relative change: ecex_adjust_font_size(ed, 2.0f);\n\n");

    return 0;
}