// SUB Language Kernel Runtime & Native Interop Layer
// Links SUB Language compiled logic into the SUB-OS Monolithic Kernel

#include <kernel/sub_lang.h>
#include <kernel/printk.h>
#include <mm/kmalloc.h>
#include <lib/string.h>

// Signature functions implemented from sub/signature.sb
const char* sub_get_os_signature(void) {
    return "SUB-OS Modular Monolithic Kernel (Engineered with C, Assembly, Rust & SUB-Lang)";
}

const char* sub_get_sub_lang_version(void) {
    return "SUB-Lang v2.0.0 (Simple Universal Builder)";
}

const char* sub_get_author_credits(void) {
    return "Designed & Created by Subhobhai & Antigravity (2026)";
}

void sub_kernel_print_signature(void) {
    printk(ANSI_BRIGHT_CYAN "=================================================================\n" ANSI_RESET);
    printk(ANSI_BRIGHT_GREEN "   SUB-OS Kernel Signature Module (Powered by SUB-Lang v2.0)\n" ANSI_RESET);
    printk(ANSI_BRIGHT_CYAN "=================================================================\n" ANSI_RESET);
    printk("  Engine   : " ANSI_YELLOW "Simple Universal Builder (Native Compiled & Interpreted)\n" ANSI_RESET);
    printk("  Identity : " ANSI_BRIGHT_WHITE "%s\n" ANSI_RESET, sub_get_os_signature());
    printk("  Version  : " ANSI_CYAN "%s\n" ANSI_RESET, sub_get_sub_lang_version());
    printk("  Credits  : " ANSI_GREEN "%s\n" ANSI_RESET, sub_get_author_credits());
    printk("  Status   : " ANSI_BRIGHT_GREEN "Active & Interoperable with Core Kernel\n" ANSI_RESET);
}

// Power governor algorithms implemented from sub/power_governor.sb
int sub_power_calc_pstate(int32_t temp_celsius, uint32_t cpu_load_pct) {
    if (temp_celsius >= 90) {
        return 4; // P4: Emergency throttle
    }
    if (temp_celsius >= 75) {
        if (cpu_load_pct > 80) return 2;
        return 3;
    }
    if (temp_celsius >= 60) {
        if (cpu_load_pct > 60) return 1;
        return 2;
    }
    if (cpu_load_pct >= 40) {
        return 0; // P0: Turbo
    }
    return 1; // P1: Standard
}

uint32_t sub_power_get_freq_mhz(int pstate) {
    switch (pstate) {
        case 0: return 3800; // 3.8 GHz Turbo
        case 1: return 3200; // 3.2 GHz High
        case 2: return 2400; // 2.4 GHz Balanced
        case 3: return 1600; // 1.6 GHz Low
        case 4:
        default: return 800; // 800 MHz Emergency Throttle
    }
}

uint32_t sub_power_get_voltage_mv(int pstate) {
    switch (pstate) {
        case 0: return 1250; // 1.25V
        case 1: return 1150; // 1.15V
        case 2: return 1050; // 1.05V
        case 3: return 950;  // 0.95V
        case 4:
        default: return 850;  // 0.85V
    }
}

// Benchmark algorithm implemented from sub/benchmark.sb
static long sub_fib_internal(long n) {
    if (n <= 1) return n;
    return sub_fib_internal(n - 1) + sub_fib_internal(n - 2);
}

static long sub_matrix_test_internal(long dim) {
    long total = 0;
    for (long i = 0; i < dim; i++) {
        for (long j = 0; j < dim; j++) {
            for (long k = 0; k < dim; k++) {
                total += (i * dim + k) * (k * dim + j);
            }
        }
    }
    return total;
}

uint32_t sub_benchmark_run(uint32_t iterations) {
    long fib_res = sub_fib_internal(15);
    long mat_res = sub_matrix_test_internal(8);
    return (uint32_t)(fib_res + (mat_res % 1000) + (iterations * 10));
}

// Easter egg module implemented from sub/easter_egg.sb
const char* sub_easter_egg_get(int idx) {
    switch (idx) {
        case 0: return "SUB-OS: Where C, Assembly, Rust, and SUB-Lang converge.";
        case 1: return "Simple Universal Builder: One language to build them all.";
        case 2: return "Born from bare-metal, forged in code.";
        case 3: return "Memory safety with Rust, native power with C, custom signature with SUB-Lang!";
        default: return "Antigravity + Subhobhai = Infinite Operating System Possibilities.";
    }
}

int sub_kernel_init(void) {
    printk(ANSI_BRIGHT_GREEN "SUB-LANG: " ANSI_RESET "SUB Language Engine initialized (v2.0.0 Native & VM)\n");
    return 0;
}