#!/bin/bash
# ui.sh - Text User Interface functions for USM installer

# Print a banner/header
print_banner() {
    echo -e "${CYAN}${BOLD}"
    echo "USM Installer - Universal Source Manifest"
    echo -e "Version: ${SCRIPT_VERSION}${NC}"
    echo ""
}

# Print a section header
print_section() {
    local title="$1"
    echo ""
    echo -e "${BOLD}${BLUE}▶ $title${NC}"
    echo ""
}

# Print a summary box
print_summary() {
    local -a items=("$@")
    local max_width=0
    
    # Find max width
    for item in "${items[@]}"; do
        local len=${#item}
        (( len > max_width )) && max_width=$len
    done
    
    (( max_width < 50 )) && max_width=50
    (( max_width > 70 )) && max_width=70
    
    local line=$(printf '─%.0s' $(seq 1 $((max_width + 2))))
    
    echo -e "${CYAN}┌${line}┐${NC}"
    for item in "${items[@]}"; do
        printf "${CYAN}│${NC} %-$((max_width))s ${CYAN}│${NC}\n" "$item"
    done
    echo -e "${CYAN}└${line}┘${NC}"
}

# Print a progress indicator
print_progress() {
    local current="$1"
    local total="$2"
    local description="$3"
    local width=40
    local filled=$((width * current / total))
    local empty=$((width - filled))
    
    printf "\r${GREEN}["
    printf "%$((filled))s" | tr ' ' '█'
    printf "%$((empty))s" | tr ' ' '░'
    printf "]${NC} ($current/$total) %s" "$description"
    
    if (( current == total )); then
        echo ""
    fi
}

# Print a list item
print_list_item() {
    local bullet="${1:-•}"
    local text="$2"
    local indent="${3:-  }"
    echo -e "${indent}${CYAN}${bullet}${NC} ${text}"
}

# Print a status line
print_status() {
    local label="$1"
    local value="$2"
    local status="${3:-info}"
    local status_icon
    
    case "$status" in
        ok)    status_icon="${GREEN}✓${NC}" ;;
        warn)  status_icon="${YELLOW}!${NC}" ;;
        error) status_icon="${RED}✗${NC}" ;;
        *)     status_icon="${BLUE}i${NC}" ;;
    esac
    
    printf "  ${status_icon} %-25s %s\n" "$label" "$value"
}

# Show installation summary and get confirmation
show_installation_summary() {
    local target_dir="$1"
    local pm="$2"
    local deps_count="$3"
    local missing_deps="$4"
    
    print_section "Installation Summary"
    
    local -a summary_items=(
        "Target Directory: ${target_dir}"
        "Package Manager: ${pm}"
    )
    
    if (( deps_count > 0 )); then
        summary_items+=("Dependencies to install: ${deps_count}")
    else
        summary_items+=("Dependencies: All installed")
    fi
    
    print_summary "${summary_items[@]}"
    
    echo ""
    
    # Show package installation step if there are deps to install
    local step_num=1
    if (( deps_count > 0 )); then
        echo -e "${YELLOW}Step $step_num:${NC} The following packages will be installed using ${pm}:"
        for pkg in $missing_deps; do
            print_list_item "•" "$pkg"
        done
        echo ""
        ((step_num++))
    fi
    
    echo -e "${YELLOW}Step $step_num:${NC} Build and install components:"
    ((step_num++))
    print_list_item "1" "Invercargill (invercargill-1) - Core library"
    print_list_item "2" "Invercargill-Json - JSON serialization"
    print_list_item "3" "USM - Universal Source Manifest"
    
    echo ""
    echo -e "${YELLOW}Step $step_num:${NC} Create shim at /usr/bin/usm"
    
    echo ""
    if ! confirm "Do you want to continue with the installation?" "n"; then
        return 1
    fi
    
    return 0
}

# Show completion message
show_completion() {
    local target_dir="$1"
    
    echo ""
    echo -e "${GREEN}✓ Installation Complete!${NC}"
    echo ""
    echo -e "  ${CYAN}Binary:${NC}     ${target_dir}/bin/usm"
    echo -e "  ${CYAN}Shim:${NC}       /usr/bin/usm"
    echo ""
    echo -e "Run ${BOLD}usm --help${NC} to get started."
    echo ""
}

# Show error and exit
show_error_and_exit() {
    local message="$1"
    local code="${2:-1}"
    
    echo ""
    echo -e "${RED}╔══════════════════════════════════════════════════════════════╗${NC}"
    echo -e "${RED}║ Installation Failed                                          ║${NC}"
    echo -e "${RED}╚══════════════════════════════════════════════════════════════╝${NC}"
    echo ""
    echo -e "${RED}Error:${NC} $message"
    echo ""
    
    exit "$code"
}