#include <behaviors.dtsi>
#include <dt-bindings/zmk/bt.h>
#include <dt-bindings/zmk/keys.h>
#include <dt-bindings/zmk/outputs.h>

#define WIN 0
#define APL 1
#define GAM 2
#define NUM 3
#define FUN 4
#define NAV 5
#define MED 6
#define SYS 7
#define DL  8
#define SFL 9
#define KL  10
#define LL  11

// Words like "sounds" can sometimes come out as "soun" because the final "ds" gets interpreted as a combo.
// Reducing timeout helps prevent this. However, reducing timeout too much makes it difficult to trigger
// the combo when desired. A timeout of 50 ms to 75 ms seems to strike a good balance for most typists.
#define RH_COMBO_TIMEOUT 50
#define LH_COMBO_TIMEOUT 50

// Single finger combos are like "rg" or "hj", where the combined keys are normally typed using
// the same finger. As a result, such sequences are typically typed quite slowly. A very long timeout
// can be used for to be very timing-tolerant, while also not risking accidentally triggering the combo.
#define SINGLE_FINGER_COMBO_TIMEOUT 200

/ {
    behaviors {
        pht: pos_hold_tap {
            compatible = "zmk,behavior-hold-tap";
            label = "POS_HOLD_TAP";
            #binding-cells = <2>;
            flavor = "tap-unless-interrupted";
            tapping-term-ms = <LH_COMBO_TIMEOUT>;
            bindings = <&kp>, <&kp>;
            hold-trigger-key-positions = <12 13>;
        };
    };

    macros {
        mcs: macro_s {
            label = "MACRO_S";
            compatible = "zmk,behavior-macro";
            #binding-cells = <0>;
            wait-ms = <0>;
            bindings
                = <&macro_press &mo SFL &kp LSFT>
                , <&macro_pause_for_release>
                , <&macro_release &mo SFL &kp LSFT>
                ;
        };

        mcf: macro_f {
            label = "MACRO_F";
            compatible = "zmk,behavior-macro";
            #binding-cells = <0>;
            wait-ms = <0>;
            bindings
                = <&macro_press &mo SFL &mo NUM>
                , <&macro_pause_for_release>
                , <&macro_release &mo SFL &mo NUM>
                ;
        };

        mcl: macro_l {
            label = "MACRO_L";
            compatible = "zmk,behavior-macro";
            #binding-cells = <0>;
            wait-ms = <0>;
            bindings
                = <&macro_press &mo KL &kp RSFT>
                , <&macro_pause_for_release>
                , <&macro_release &mo KL &kp RSFT>
                ;
        };
    };

    behaviors {
        smt: s_macro_tap {
            compatible = "zmk,behavior-hold-tap";
            label = "S_MACRO_TAP";
            #binding-cells = <2>;
            flavor = "tap-unless-interrupted";
            tapping-term-ms = <LH_COMBO_TIMEOUT>;
            bindings = <&mcs>, <&kp>;
            hold-trigger-key-positions = <15 16 36 37 38 40 41>;
        };

        dlt: d_layer_tap {
            compatible = "zmk,behavior-hold-tap";
            label = "D_LAYER_TAP";
            #binding-cells = <2>;
            flavor = "tap-unless-interrupted";
            tapping-term-ms = <LH_COMBO_TIMEOUT>;
            bindings = <&mo>, <&kp>;
            hold-trigger-key-positions = <14 16 36 37 38 40 41>;
        };

        fmt: f_macro_tap {
            compatible = "zmk,behavior-hold-tap";
            label = "F_MACRO_TAP";
            #binding-cells = <2>;
            flavor = "tap-unless-interrupted";
            tapping-term-ms = <LH_COMBO_TIMEOUT>;
            bindings = <&mcf>, <&kp>;
            hold-trigger-key-positions = <14 15 36 37 38 40 41>;
        };

        klt: k_layer_tap {
            compatible = "zmk,behavior-hold-tap";
            label = "K_LAYER_TAP";
            #binding-cells = <2>;
            flavor = "tap-unless-interrupted";
            tapping-term-ms = <RH_COMBO_TIMEOUT>;
            bindings = <&mo>, <&kp>;
            hold-trigger-key-positions = <21 36 37 38 40 41>;
        };
        
        lmt: l_macro_tap {
            compatible = "zmk,behavior-hold-tap";
            label = "L_MACRO_TAP";
            #binding-cells = <2>;
            flavor = "tap-unless-interrupted";
            tapping-term-ms = <RH_COMBO_TIMEOUT>;
            bindings = <&mcl>, <&kp>;
            hold-trigger-key-positions = <20 36 37 38 40 41>;
        };
    };

    sl {
        release-after-ms = <20000>; // 20 seconds
    };

    combos {
        compatible = "zmk,combos";
        // Mode switching combos:
        combo_sys {
            timeout-ms = <LH_COMBO_TIMEOUT>;
            key-positions = <1 2 3>;
            bindings = <&sl SYS>;
        };
        combo_standard {
            timeout-ms = <LH_COMBO_TIMEOUT>;
            key-positions = <3 4 5>;
            bindings = <&to WIN>;
        };
        combo_game {
            timeout-ms = <LH_COMBO_TIMEOUT>;
            key-positions = <2 3 4>;
            bindings = <&to GAM>;
        };

        // Slow combos:
        // Because these combos use only keys controlled by a single index finger,
        // it is very unlikely that a standard touch-typist will accidentally trigger
        // during normal typing. We can use a very long timeout for these.
        combo_tab {
            timeout-ms = <SINGLE_FINGER_COMBO_TIMEOUT>;
            key-positions = <4 17>;
            bindings = <&kp TAB>;
        };
        combo_esc {
            timeout-ms = <SINGLE_FINGER_COMBO_TIMEOUT>;
        // 16,17 is a great location for ESC: convenient and safe. However, it is just affected
        // by the hold-tap => combo mis-fire bug: https://github.com/zmkfirmware/zmk/issues/1395
        // Until that is resolved, use positions 4,5
            key-positions = <16 17>;
            bindings = <&kp ESC>;
        };
        combo_quote {
            timeout-ms = <SINGLE_FINGER_COMBO_TIMEOUT>;
            key-positions = <18 19>;
            bindings = <&kp QUOT>;
        };
        combo_caps {
            timeout-ms = <SINGLE_FINGER_COMBO_TIMEOUT>;
            key-positions = <30 31>;
            bindings = <&kp CAPS>;
        };
        combo_menu {
            timeout-ms = <SINGLE_FINGER_COMBO_TIMEOUT>;
            key-positions = <7 18>;
            bindings = <&kp K_CMENU>;
        };
    };

    keymap {
        compatible = "zmk,keymap";

        windows_layer {
            bindings = <
&none    &kp Q        &kp W     &kp E      &kp R     &kp T     /**/  &kp Y    &kp U    &kp I      &kp O     &kp P     &kp BSLH
&mo FUN  &pht LSFT A  &smt S S  &dlt DL D  &fmt F F  &kp G     /**/  &kp H    &kp J    &klt KL K  &lmt L L  &kp SCLN  &kp QUOT
&none    &kp Z        &kp X     &kp C      &kp V     &kp B     /**/  &kp N    &kp M    &kp CMMA   &kp DOT   &kp FSLH  &none
                                &kp LGUI   &kp LALT  &kp LCTL  /**/  &kp SPC  &mo NAV  &mo MED
            >;
        };
        
        apple_layer {
            bindings = <
&trans  &trans  &trans   &trans    &trans    &trans   /**/  &trans   &trans   &trans   &trans  &trans  &trans
&trans  &trans  &trans   &trans    &trans    &trans   /**/  &trans   &trans   &trans   &trans  &trans  &trans
&trans  &trans  &trans   &trans    &trans    &trans   /**/  &trans   &trans   &trans   &trans  &trans  &trans
                        &kp LCTL  &kp LALT  &kp LGUI  /**/  &kp SPC  &mo NAV  &mo MED
            >;
        };

        game_layer {
            bindings = <
&kp TAB   &kp Q  &kp W  &kp E      &kp R     &kp T     /**/  &kp Y    &kp U    &kp I     &kp O    &kp P     &kp BSLH
&kp ESC   &kp A  &kp S  &kp D      &kp F     &kp G     /**/  &kp H    &kp J    &kp K     &kp L    &kp SCLN  &kp QUOT
&kp LSFT  &kp Z  &kp X  &kp C      &kp V     &kp B     /**/  &kp N    &kp M    &kp CMMA  &kp DOT  &kp FSLH  &kp RSFT
                        &kp GRAV   &kp LALT  &kp LCTL  /**/  &kp SPC  &mo NAV  &mo MED
            >;
        };

        num_layer {
            bindings = <
&trans  &trans  &trans    &trans  &trans  &trans  /**/  &kp GRAV   &kp N7  &kp N8  &kp N9  &kp LBKT  &kp RBKT
&trans  &trans  &kp LSFT  &mo DL  &trans  &trans  /**/  &kp EQL    &kp N4  &kp N5  &kp N6  &kp N0    &kp DOT
&trans  &trans  &trans    &trans  &trans  &trans  /**/  &kp MINUS  &kp N1  &kp N2  &kp N3  &kp FSLH  &kp DOT
                          &trans  &trans  &trans  /**/  &trans     &trans  &trans
            >;
        };

        function_layer {
            bindings = <
&trans  &trans    &trans  &trans  &trans  &trans  /**/  &kp F12  &kp F7  &kp F8  &kp F9  &kp LBKT  &kp RBKT
&trans  &kp LSFT  &trans  &trans  &trans  &trans  /**/  &kp F11  &kp F4  &kp F5  &kp F6  &trans    &kp DOT
&trans  &trans    &trans  &trans  &trans  &trans  /**/  &kp F10  &kp F1  &kp F2  &kp F3  &kp FSLH  &kp DOT
                          &trans  &trans  &trans  /**/  &trans   &trans  &trans
            >;
        };

        nav_layer {
            bindings = <
&trans  &trans  &trans  &trans  &trans  &trans  /**/  &trans  &trans    &kp UARW  &kp PGUP  &kp DEL   &trans
&trans  &trans  &trans  &trans  &trans  &trans  /**/  &trans  &kp LARW  &kp DARW  &kp RARW  &kp BKSP  &trans
&trans  &trans  &trans  &trans  &trans  &trans  /**/  &trans  &kp PGDN  &kp HOME  &kp END   &kp RET   &trans
                        &trans  &trans  &trans  /**/  &trans  &trans    &trans
            >;
        };

        media_layer {
            bindings = <
&trans  &trans  &trans    &trans  &trans  &trans           /**/  &trans   &trans        &kp C_VOL_UP  &trans            &kp PRSC    &trans
&trans  &trans  &kp SLCK  &trans  &trans  &trans           /**/  &trans   &kp C_BRI_DN  &kp C_VOL_DN  &kp C_BRI_UP      &trans      &trans
&trans  &trans  &trans    &trans  &trans  &kp PAUSE_BREAK  /**/  &kp INS  &kp C_MUTE    &kp C_PREV    &kp C_PLAY_PAUSE  &kp C_NEXT  &trans
                          &trans  &trans  &trans           /**/  &trans   &trans        &trans
            >;
        };

        system_layer {
            bindings = <
&trans  &trans   &to WIN       &trans        &trans        &trans        /**/  &trans  &trans  &trans  &trans  &trans  &trans
&trans  &to APL  &out OUT_USB  &trans        &trans        &trans        /**/  &trans  &trans  &trans  &trans  &trans  &trans
&trans  &trans   &trans        &bt BT_CLR    &trans        &out OUT_BLE  /**/  &trans  &trans  &trans  &trans  &trans  &trans
                               &bt BT_SEL 1  &bt BT_SEL 2  &bt BT_SEL 3  /**/  &trans  &trans  &trans
            >;
        };

        d_key_layer {
            bindings = <
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
&trans  &trans  &kp LSFT  &none     &mo NUM  &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
                          &trans    &trans   &trans  /**/  &trans  &trans  &trans
            >;
        };

        sf_key_layer {
            bindings = <
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
&trans  &trans  &trans    &mo DL    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
                          &trans    &trans   &trans  /**/  &trans  &trans  &trans
            >;
        };

        k_key_layer {
            bindings = <
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &none   &kp RSFT  &trans  &trans
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
                          &trans    &trans   &trans  /**/  &trans  &trans  &trans
            >;
        };

        l_key_layer {
            bindings = <
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &mo KL  &trans    &trans  &trans
&trans  &trans  &trans    &trans    &trans   &trans  /**/  &trans  &trans  &trans  &trans    &trans  &trans
                          &trans    &trans   &trans  /**/  &trans  &trans  &trans
            >;
        };
    };
};