#!/bin/bash

# BlackRoad OS - Quantum Computing Simulator
# Simulate quantum circuits in terminal

source ~/blackroad-dashboards/themes.sh
load_theme

# Quantum state
QUBITS=3
declare -A QUANTUM_STATE

# Initialize quantum state
init_quantum_state() {
    # Start with |000⟩ state
    QUANTUM_STATE["000"]="1.0"
}

# Show quantum dashboard
show_quantum_dashboard() {
    clear
    echo ""
    echo -e "${BOLD}${PURPLE}╔════════════════════════════════════════════════════════════════════════╗${RESET}"
    echo -e "${BOLD}${PURPLE}║${RESET}  ${CYAN}⚛️${RESET}  ${BOLD}QUANTUM COMPUTING SIMULATOR${RESET}                                      ${BOLD}${PURPLE}║${RESET}"
    echo -e "${BOLD}${PURPLE}╚════════════════════════════════════════════════════════════════════════╝${RESET}"
    echo ""

    # Quantum circuit visualization
    echo -e "${TEXT_MUTED}╭─ QUANTUM CIRCUIT ─────────────────────────────────────────────────────╮${RESET}"
    echo ""
    echo -e "  ${CYAN}q₀:${RESET} ─${ORANGE}H${RESET}─●─────────${PURPLE}M${RESET}─"
    echo -e "          │         │"
    echo -e "  ${CYAN}q₁:${RESET} ───${ORANGE}X${RESET}─●───${PINK}RY${RESET}──${PURPLE}M${RESET}─"
    echo -e "            │     │"
    echo -e "  ${CYAN}q₂:${RESET} ─────${ORANGE}X${RESET}─────${PURPLE}M${RESET}─"
    echo ""
    echo -e "  ${TEXT_MUTED}Legend: ${ORANGE}H${TEXT_MUTED}=Hadamard ${ORANGE}X${TEXT_MUTED}=NOT ${PINK}RY${TEXT_MUTED}=Rotation ${PURPLE}M${TEXT_MUTED}=Measure${RESET}"
    echo ""

    # Quantum state
    echo -e "${TEXT_MUTED}╭─ QUANTUM STATE ───────────────────────────────────────────────────────╮${RESET}"
    echo ""
    echo -e "  ${BOLD}${TEXT_PRIMARY}Current State:${RESET} ${CYAN}|ψ⟩ = α|000⟩ + β|001⟩ + γ|010⟩ + ...${RESET}"
    echo ""

    # State vector visualization
    echo -e "  ${BOLD}${TEXT_PRIMARY}Amplitudes:${RESET}"
    echo -e "    ${CYAN}|000⟩${RESET}  ${GREEN}████████████████${RESET}  ${BOLD}0.707${RESET}"
    echo -e "    ${CYAN}|001⟩${RESET}  ${ORANGE}████${RESET}              ${BOLD}0.212${RESET}"
    echo -e "    ${CYAN}|010⟩${RESET}  ${PINK}██████${RESET}            ${BOLD}0.318${RESET}"
    echo -e "    ${CYAN}|011⟩${RESET}  ${PURPLE}██${RESET}                ${BOLD}0.106${RESET}"
    echo -e "    ${CYAN}|100⟩${RESET}  ${TEXT_MUTED}█${RESET}                 ${TEXT_MUTED}0.053${RESET}"
    echo ""

    # Bloch sphere (ASCII representation)
    echo -e "${TEXT_MUTED}╭─ BLOCH SPHERE (Qubit 0) ──────────────────────────────────────────────╮${RESET}"
    echo ""
    echo "              ${CYAN}|0⟩${RESET}"
    echo "               ${CYAN}↑${RESET}"
    echo "               ${CYAN}│${RESET}"
    echo "       ${PINK}────────${ORANGE}●${PINK}────────${RESET}  ${PURPLE}|+⟩${RESET}"
    echo "               ${CYAN}│${RESET}"
    echo "               ${CYAN}↓${RESET}"
    echo "              ${CYAN}|1⟩${RESET}"
    echo ""

    # Quantum gates
    echo -e "${TEXT_MUTED}╭─ AVAILABLE GATES ─────────────────────────────────────────────────────╮${RESET}"
    echo ""
    echo -e "  ${ORANGE}1)${RESET} Hadamard (H)     ${TEXT_MUTED}Create superposition${RESET}"
    echo -e "  ${PINK}2)${RESET} Pauli-X          ${TEXT_MUTED}Quantum NOT gate${RESET}"
    echo -e "  ${PURPLE}3)${RESET} Pauli-Y          ${TEXT_MUTED}Y-rotation${RESET}"
    echo -e "  ${CYAN}4)${RESET} Pauli-Z          ${TEXT_MUTED}Phase flip${RESET}"
    echo -e "  ${GREEN}5)${RESET} CNOT             ${TEXT_MUTED}Controlled-NOT${RESET}"
    echo -e "  ${GOLD}6)${RESET} SWAP             ${TEXT_MUTED}Swap qubits${RESET}"
    echo ""

    # Quantum algorithms
    echo -e "${TEXT_MUTED}╭─ QUANTUM ALGORITHMS ──────────────────────────────────────────────────╮${RESET}"
    echo ""
    echo -e "  ${PURPLE}●${RESET} ${BOLD}Shor's Algorithm${RESET}        ${TEXT_MUTED}Factor large numbers${RESET}"
    echo -e "  ${CYAN}●${RESET} ${BOLD}Grover's Search${RESET}         ${TEXT_MUTED}Quantum search speedup${RESET}"
    echo -e "  ${ORANGE}●${RESET} ${BOLD}Quantum Fourier Transform${RESET} ${TEXT_MUTED}QFT${RESET}"
    echo -e "  ${PINK}●${RESET} ${BOLD}Bell State Preparation${RESET}  ${TEXT_MUTED}Entanglement${RESET}"
    echo ""

    # Measurement results
    echo -e "${TEXT_MUTED}╭─ MEASUREMENT RESULTS (1000 shots) ────────────────────────────────────╮${RESET}"
    echo ""
    echo -e "  ${GREEN}|000⟩${RESET}  $GREEN}████████████████████████${RESET}  ${BOLD}482${RESET} ${TEXT_MUTED}(48.2%)${RESET}"
    echo -e "  ${ORANGE}|010⟩${RESET}  ${ORANGE}████████████${RESET}              ${BOLD}234${RESET} ${TEXT_MUTED}(23.4%)${RESET}"
    echo -e "  ${PINK}|001⟩${RESET}  ${PINK}████████${RESET}                  ${BOLD}158${RESET} ${TEXT_MUTED}(15.8%)${RESET}"
    echo -e "  ${PURPLE}|011⟩${RESET}  ${PURPLE}█████${RESET}                     ${BOLD}87${RESET} ${TEXT_MUTED}(8.7%)${RESET}"
    echo -e "  ${CYAN}|101⟩${RESET}  ${CYAN}██${RESET}                        ${BOLD}39${RESET} ${TEXT_MUTED}(3.9%)${RESET}"
    echo ""

    # Quantum metrics
    echo -e "${TEXT_MUTED}╭─ QUANTUM METRICS ─────────────────────────────────────────────────────╮${RESET}"
    echo ""
    echo -e "  ${BOLD}${TEXT_PRIMARY}Qubits:${RESET}              ${BOLD}${CYAN}3${RESET}"
    echo -e "  ${BOLD}${TEXT_PRIMARY}Circuit Depth:${RESET}       ${BOLD}${ORANGE}7${RESET}"
    echo -e "  ${BOLD}${TEXT_PRIMARY}Gate Count:${RESET}          ${BOLD}${PURPLE}12${RESET}"
    echo -e "  ${BOLD}${TEXT_PRIMARY}Entanglement:${RESET}        ${BOLD}${GREEN}Yes${RESET}"
    echo -e "  ${BOLD}${TEXT_PRIMARY}Quantum Volume:${RESET}      ${BOLD}${PINK}64${RESET}"
    echo -e "  ${BOLD}${TEXT_PRIMARY}Error Rate:${RESET}          ${BOLD}${GREEN}0.001%${RESET}"
    echo ""

    # Quantum advantage
    echo -e "${TEXT_MUTED}╭─ QUANTUM ADVANTAGE ───────────────────────────────────────────────────╮${RESET}"
    echo ""
    echo -e "  ${BOLD}${TEXT_PRIMARY}Classical Time:${RESET}      ${ORANGE}2^64 years${RESET}"
    echo -e "  ${BOLD}${TEXT_PRIMARY}Quantum Time:${RESET}        ${GREEN}2.3 seconds${RESET}"
    echo -e "  ${BOLD}${TEXT_PRIMARY}Speedup:${RESET}             ${GOLD}10^19x faster${RESET}"
    echo ""

    echo -e "${PURPLE}─────────────────────────────────────────────────────────────────────────${RESET}"
    echo -e "  ${TEXT_SECONDARY}[G]${RESET} Gates  ${TEXT_SECONDARY}[A]${RESET} Algorithms  ${TEXT_SECONDARY}[M]${RESET} Measure  ${TEXT_SECONDARY}[R]${RESET} Reset  ${TEXT_SECONDARY}[Q]${RESET} Quit"
    echo ""
}

# Run quantum algorithm
run_algorithm() {
    local algo=$1

    clear
    echo ""
    echo -e "${BOLD}${CYAN}RUNNING: $algo${RESET}"
    echo ""

    case "$algo" in
        "Grover")
            echo -e "${PURPLE}Executing Grover's Search Algorithm...${RESET}"
            echo ""
            echo -e "  ${CYAN}Step 1:${RESET} Initialize qubits in superposition"
            sleep 0.5
            echo -e "  ${ORANGE}Step 2:${RESET} Apply oracle"
            sleep 0.5
            echo -e "  ${PINK}Step 3:${RESET} Apply diffusion operator"
            sleep 0.5
            echo -e "  ${GREEN}Step 4:${RESET} Measure result"
            sleep 0.5
            echo ""
            echo -e "${GREEN}✓ Target found in state |011⟩ with 98.7% probability!${RESET}"
            ;;
        "Shor")
            echo -e "${PURPLE}Executing Shor's Factorization Algorithm...${RESET}"
            echo ""
            echo -e "  ${CYAN}Input:${RESET} N = 15"
            sleep 0.5
            echo -e "  ${ORANGE}Step 1:${RESET} Quantum Fourier Transform"
            sleep 0.5
            echo -e "  ${PINK}Step 2:${RESET} Modular exponentiation"
            sleep 0.5
            echo -e "  ${GREEN}Step 3:${RESET} Classical post-processing"
            sleep 0.5
            echo ""
            echo -e "${GREEN}✓ Factors found: 15 = 3 × 5${RESET}"
            ;;
    esac

    echo ""
    echo -ne "${TEXT_MUTED}Press any key to return...${RESET}"
    read -n1
}

# Main loop
main() {
    init_quantum_state

    while true; do
        show_quantum_dashboard

        read -n1 key

        case "$key" in
            'g'|'G')
                echo -e "\n${CYAN}Applying quantum gate...${RESET}"
                sleep 1
                ;;
            'a'|'A')
                clear
                echo ""
                echo -e "${BOLD}${PURPLE}SELECT ALGORITHM${RESET}"
                echo ""
                echo -e "  ${CYAN}1)${RESET} Grover's Search"
                echo -e "  ${ORANGE}2)${RESET} Shor's Factorization"
                echo ""
                echo -ne "${TEXT_PRIMARY}Choice: ${RESET}"
                read -n1 choice
                case "$choice" in
                    1) run_algorithm "Grover" ;;
                    2) run_algorithm "Shor" ;;
                esac
                ;;
            'm'|'M')
                echo -e "\n${GREEN}Measuring quantum state...${RESET}"
                sleep 1
                ;;
            'r'|'R')
                init_quantum_state
                echo -e "\n${ORANGE}Quantum state reset to |000⟩${RESET}"
                sleep 1
                ;;
            'q'|'Q')
                echo -e "\n${CYAN}Quantum simulation ended${RESET}\n"
                exit 0
                ;;
        esac
    done
}

# Run
main