#!/usr/bin/env bash
# provisioning/bootstrap/install.sh
# Bootstrap script for provisioning platform (POSIX Bash + Nushell)
# Pure Bash implementation to avoid Nushell IR mode limitations

set -e

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

# Configuration
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
WORKSPACE_NAME="workspace_librecloud"
WORKSPACE_PATH="$PROJECT_ROOT/$WORKSPACE_NAME"

# Helper functions
print_header() {
    echo -e "${GREEN}╔════════════════════════════════════════════════════════════════╗${NC}"
    echo -e "${GREEN}║              PROVISIONING BOOTSTRAP (Bash)                     ║${NC}"
    echo -e "${GREEN}╚════════════════════════════════════════════════════════════════╝${NC}"
}

print_stage() {
    local stage="$1"
    local description="$2"
    echo ""
    echo "$stage $description"
    echo "─────────────────────────────────────────────────────────────────"
}

print_success() {
    echo "  ✅ $1"
}

print_warning() {
    echo "  ⚠️  $1"
}

print_error() {
    echo "  ❌ $1"
}

check_command() {
    command -v "$1" &> /dev/null
}

# Main bootstrap logic

print_header
echo ""

# ════════════════════════════════════════════════════════════════════════
# STAGE 1: SYSTEM DETECTION
# ════════════════════════════════════════════════════════════════════════

print_stage "📊" "Stage 1: System Detection"

OS=$(uname -s)
ARCH=$(uname -m)
CPU_COUNT=$(sysctl -n hw.physicalcpu 2>/dev/null || nproc 2>/dev/null || echo "unknown")

# Get RAM in GB
if [[ "$OS" == "Darwin" ]]; then
    MEM_GB=$(($(sysctl -n hw.memsize) / 1024 / 1024 / 1024))
else
    MEM_GB=$(($(grep MemTotal /proc/meminfo | awk '{print $2}') / 1024 / 1024))
fi

echo "  OS: $OS"
echo "  Architecture: $ARCH"
echo "  CPU Cores: $CPU_COUNT"
echo "  Memory: ${MEM_GB} GB"

# Validate minimum requirements
MIN_RAM=2
if [[ $MEM_GB -lt $MIN_RAM ]]; then
    print_error "Requires at least $MIN_RAM GB RAM (have $MEM_GB GB)"
    exit 1
fi

print_success "System requirements met"

# ════════════════════════════════════════════════════════════════════════
# STAGE 2: DEPENDENCY CHECK
# ════════════════════════════════════════════════════════════════════════

print_stage "📦" "Stage 2: Checking Dependencies"

REQUIRED_TOOLS=("git" "docker" "rustc" "cargo" "nu")
MISSING_TOOLS=()

for tool in "${REQUIRED_TOOLS[@]}"; do
    if ! check_command "$tool"; then
        MISSING_TOOLS+=("$tool")
    fi
done

if [[ ${#MISSING_TOOLS[@]} -gt 0 ]]; then
    print_warning "Missing tools:"
    for tool in "${MISSING_TOOLS[@]}"; do
        echo "    - $tool"
    done

    if [[ " ${MISSING_TOOLS[*]} " =~ " docker " ]]; then
        echo ""
        echo "  📥 Docker is required. Install from: https://docs.docker.com/get-docker/"
    fi

    if [[ " ${MISSING_TOOLS[*]} " =~ " rustc " ]]; then
        echo ""
        echo "  📥 Rust is required. Install from: https://rustup.rs/"
        echo "     Then run: rustup default stable"
    fi

    echo ""
    print_error "Please install missing dependencies and run again"
    exit 1
fi

print_success "All dependencies found"

# Show versions
echo ""
echo "  Versions:"
echo "    Docker: $(docker --version)"
echo "    Rust: $(rustc --version)"
echo "    Nushell: $(nu --version)"

# ════════════════════════════════════════════════════════════════════════
# STAGE 3: CREATE DIRECTORY STRUCTURE
# ════════════════════════════════════════════════════════════════════════

print_stage "📁" "Stage 3: Creating Directory Structure"

mkdir -p "$WORKSPACE_PATH/config/generated/providers"
mkdir -p "$WORKSPACE_PATH/config/generated/platform"
mkdir -p "$WORKSPACE_PATH/.orchestrator/data/queue"
mkdir -p "$WORKSPACE_PATH/.kms"
mkdir -p "$WORKSPACE_PATH/.providers"
mkdir -p "$WORKSPACE_PATH/.taskservs"
mkdir -p "$WORKSPACE_PATH/.clusters"

print_success "Directory structure created"

# ════════════════════════════════════════════════════════════════════════
# STAGE 4: VALIDATE CONFIGURATION
# ════════════════════════════════════════════════════════════════════════

print_stage "⚙️ " "Stage 4: Validating Configuration"

CONFIG_NCL="$WORKSPACE_PATH/config/config.ncl"

if [[ ! -f "$CONFIG_NCL" ]]; then
    print_warning "config.ncl not found at $CONFIG_NCL"
    echo "  Creating default config..."

    TEMPLATE="$PROJECT_ROOT/workspace_librecloud/config/config.ncl"
    if [[ -f "$TEMPLATE" ]]; then
        cp "$TEMPLATE" "$CONFIG_NCL"
        print_success "Copied from template"
    else
        print_error "Cannot find config template"
        exit 1
    fi
fi

# Validate Nickel syntax
if ! nickel typecheck "$CONFIG_NCL" > /dev/null 2>&1; then
    print_error "Nickel configuration validation failed"
    nickel typecheck "$CONFIG_NCL"
    exit 1
fi

print_success "Configuration syntax valid"

# ════════════════════════════════════════════════════════════════════════
# STAGE 5: EXPORT CONFIGURATION
# ════════════════════════════════════════════════════════════════════════

print_stage "📤" "Stage 5: Exporting Configuration to TOML"

cd "$PROJECT_ROOT"

# Use Nushell for config export (IT requires module imports)
if nu -c "
  use provisioning/core/nulib/lib_provisioning/config/export.nu *
  export-all-configs '$WORKSPACE_PATH'
" 2>/dev/null; then
    print_success "Configuration exported"
else
    print_warning "Configuration export encountered issues (may continue)"
fi

# ════════════════════════════════════════════════════════════════════════
# STAGE 6: INITIALIZE ORCHESTRATOR
# ════════════════════════════════════════════════════════════════════════

print_stage "🚀" "Stage 6: Initializing Orchestrator Service"

ORCHESTRATOR_PATH="$PROJECT_ROOT/provisioning/platform/orchestrator"

if [[ -d "$ORCHESTRATOR_PATH" ]]; then
    echo "  Starting orchestrator service in background..."

    if cd "$ORCHESTRATOR_PATH" && \
       ./scripts/start-orchestrator.nu --background \
           --provisioning-path "$PROJECT_ROOT/provisioning/core/cli/provisioning" 2>/dev/null; then
        print_success "Orchestrator started"
        echo "  📝 Check logs: tail -f $ORCHESTRATOR_PATH/data/orchestrator.log"
    else
        print_warning "Orchestrator may not have started (check logs)"
    fi
else
    print_warning "Orchestrator not found at $ORCHESTRATOR_PATH"
fi

# ════════════════════════════════════════════════════════════════════════
# STAGE 7: VERIFY INSTALLATION
# ════════════════════════════════════════════════════════════════════════

print_stage "✅" "Stage 7: Verification"

FILES_CHECK=(
    "config/generated/workspace.toml"
    "config/generated/providers/upcloud.toml"
    "config/generated/platform/orchestrator.toml"
)

MISSING_FILES=()
for file in "${FILES_CHECK[@]}"; do
    if [[ ! -f "$WORKSPACE_PATH/$file" ]]; then
        MISSING_FILES+=("$file")
    fi
done

if [[ ${#MISSING_FILES[@]} -gt 0 ]]; then
    print_warning "Missing generated files:"
    for file in "${MISSING_FILES[@]}"; do
        echo "    - $file"
    done
else
    print_success "All configuration files generated"
fi

DIRECTORIES_CHECK=(
    ".orchestrator/data/queue"
    ".kms"
    ".providers"
    ".taskservs"
    ".clusters"
)

ALL_DIRS_EXIST=true
for dir in "${DIRECTORIES_CHECK[@]}"; do
    if [[ ! -d "$WORKSPACE_PATH/$dir" ]]; then
        ALL_DIRS_EXIST=false
        break
    fi
done

if $ALL_DIRS_EXIST; then
    print_success "All required directories created"
else
    print_warning "Some directories missing"
fi

# ════════════════════════════════════════════════════════════════════════
# FINAL STATUS
# ════════════════════════════════════════════════════════════════════════

echo ""
echo -e "${GREEN}╔════════════════════════════════════════════════════════════════╗${NC}"
echo -e "${GREEN}║                   BOOTSTRAP COMPLETE ✅                        ║${NC}"
echo -e "${GREEN}╚════════════════════════════════════════════════════════════════╝${NC}"
echo ""

echo "📍 Next Steps:"
echo ""
echo "1. Verify configuration:"
echo "   cat $WORKSPACE_PATH/config/config.ncl"
echo ""
echo "2. Check orchestrator is running:"
echo "   curl http://localhost:9090/health"
echo ""
echo "3. Start provisioning:"
echo "   provisioning server create --infra sgoyol --name web-01"
echo ""
echo "4. Monitor workflow:"
echo "   provisioning workflow monitor <workflow_id>"
echo ""
echo "📚 Documentation:"
echo "   - User Guide: docs/user/TYPEDIALOG_PLATFORM_CONFIG_GUIDE.md"
echo "   - Architecture: ARCHITECTURE_CLARIFICATION.md"
echo "   - Workflow: PROVISIONING_WORKFLOW.md"
echo ""