#!/bin/bash
set -euo pipefail

#
# Rectifier Deployment Script
#
# Unified auto-deploy that detects changed components and deploys them.
# Called by pre-push hook after pushing to main.
#
# Components handled:
# - status-dashboard   → deploy-status-dashboard.sh
# - service-registry   → deploy-service-registry.sh
# - Platform services  → release-deploy.sh (full pipeline)
#
# Usage: ./rectify-deploy.sh [--dry-run]
#

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"

# Source dependency graph library (dynamic detection from package.json files)
source "$SCRIPT_DIR/lib/dependency-graph.sh" 2>/dev/null || {
    echo "Warning: dependency-graph.sh not found, using fallback detection"
    FALLBACK_DETECTION=true
}

# Inline logging
log_header() { echo -e "\n\033[1;35m━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\033[0m"; echo -e "\033[1;35m  $1\033[0m"; echo -e "\033[1;35m━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\033[0m"; }
log_step() { echo -e "\n\033[1;34m▶\033[0m $1"; }
log_info() { echo -e "\033[0;36m  ℹ\033[0m $1"; }
log_success() { echo -e "\033[0;32m  ✓\033[0m $1"; }
log_error() { echo -e "\033[0;31m  ✗\033[0m $1"; }
log_warn() { echo -e "\033[0;33m  ⚠\033[0m $1"; }

DRY_RUN="${1:-}"

# =============================================================================
# SSL CERTIFICATE CHECK
# =============================================================================

check_ssl_certificates() {
    log_step "Checking SSL certificates..."

    local reconcile_dir="${PROJECT_ROOT}/infrastructure/reconciliation"

    if [[ ! -x "$reconcile_dir/reconcile" ]]; then
        log_warn "Reconciliation system not available, skipping SSL check"
        return 0
    fi

    if [ "$DRY_RUN" = "--dry-run" ]; then
        log_info "[DRY RUN] Would check SSL certificates on VPS"
        return 0
    fi

    "$reconcile_dir/reconcile" --host vps --service ssl-certificate || {
        log_error "SSL certificate check/renewal failed"
        return 1
    }

    log_success "SSL certificates OK"
}

# =============================================================================
# DETECT CHANGES
# =============================================================================

detect_all_changes() {
    # All logging in this function goes to stderr since stdout is captured
    log_step "Detecting changed components..." >&2

    cd "$PROJECT_ROOT"

    # Get list of changed files since last push
    local CHANGED_FILES
    CHANGED_FILES=$(git diff --name-only HEAD~1..HEAD 2>/dev/null || git diff --name-only HEAD)

    if [ -z "$CHANGED_FILES" ]; then
        log_info "No changes detected" >&2
        return
    fi

    local file_count
    file_count=$(echo "$CHANGED_FILES" | wc -l)
    log_info "Changed files: $file_count" >&2

    # Use dynamic dependency detection from package.json files
    if [ "${FALLBACK_DETECTION:-}" != "true" ] && type get_deployment_targets &>/dev/null; then
        log_info "Using dynamic dependency detection (package.json)" >&2

        local COMPONENTS
        COMPONENTS=$(get_deployment_targets "$CHANGED_FILES")

        # Log what was detected
        for comp in $COMPONENTS; do
            log_info "  Deploy target: $comp" >&2
        done

        echo "$COMPONENTS"
    else
        # Fallback: pattern-based detection
        log_warn "Using fallback pattern detection" >&2

        local COMPONENTS=""

        # Direct target changes
        if echo "$CHANGED_FILES" | grep -q "^features/status-dashboard/"; then
            COMPONENTS="$COMPONENTS status-dashboard"
            log_info "  Direct: status-dashboard" >&2
        fi

        if echo "$CHANGED_FILES" | grep -q "^infrastructure/service-registry/"; then
            COMPONENTS="$COMPONENTS service-registry"
            log_info "  Direct: service-registry" >&2
        fi

        # UI packages affect all UI consumers
        if echo "$CHANGED_FILES" | grep -q "^@packages/@ui/"; then
            COMPONENTS="$COMPONENTS status-dashboard service-registry"
            log_info "  Package: @packages/@ui/* -> all targets" >&2
        fi

        # Core packages affect all consumers
        if echo "$CHANGED_FILES" | grep -q "^@packages/@core/"; then
            COMPONENTS="$COMPONENTS status-dashboard service-registry"
            log_info "  Package: @packages/@core/* -> all targets" >&2
        fi

        # Deduplicate and return
        echo "$COMPONENTS" | tr ' ' '\n' | grep -v '^$' | sort -u | tr '\n' ' '
    fi
}

# =============================================================================
# DEPLOY COMPONENTS
# =============================================================================

deploy_component() {
    local component="$1"

    log_step "Deploying: $component"

    if [ "$DRY_RUN" = "--dry-run" ]; then
        log_info "[DRY RUN] Would reconcile $component via reconciliation system"
        return 0
    fi

    # All deployments now go through reconciliation system
    local reconcile_dir="${PROJECT_ROOT}/infrastructure/reconciliation"

    if [[ ! -x "$reconcile_dir/reconcile" ]]; then
        log_error "Reconciliation system not found at: $reconcile_dir"
        return 1
    fi

    case "$component" in
        status-dashboard)
            log_info "Running reconciliation for status-dashboard..."
            "$reconcile_dir/reconcile" --host vps --service status-dashboard || {
                log_warn "status-dashboard reconciliation failed (continuing)"
                return 1
            }
            ;;
        service-registry)
            log_info "Running reconciliation for service-registry..."
            "$reconcile_dir/reconcile" --host vps --service service-registry || {
                log_warn "service-registry reconciliation failed (continuing)"
                return 1
            }
            ;;
        *)
            log_warn "Unknown component: $component (no reconciliation handler)"
            return 1
            ;;
    esac

    log_success "$component deployed via reconciliation"
}

# =============================================================================
# MAIN
# =============================================================================

main() {
    log_header "Rectifier Auto-Deploy"

    cd "$PROJECT_ROOT"

    # Check SSL certificates first (before any deployment)
    check_ssl_certificates || {
        log_warn "SSL issues detected - continuing with deploy"
    }

    # Detect what changed
    local CHANGED_COMPONENTS
    CHANGED_COMPONENTS=$(detect_all_changes)

    if [ -z "$CHANGED_COMPONENTS" ]; then
        log_info "No deployable components changed"
        return 0
    fi

    log_info "Components to deploy: $CHANGED_COMPONENTS"

    # Deploy each component
    local DEPLOY_COUNT=0
    local FAIL_COUNT=0

    for component in $CHANGED_COMPONENTS; do
        if deploy_component "$component"; then
            ((DEPLOY_COUNT++)) || true
        else
            ((FAIL_COUNT++)) || true
        fi
    done

    echo ""
    log_header "Rectifier Complete"
    log_info "Deployed: $DEPLOY_COUNT component(s)"
    if [ "$FAIL_COUNT" -gt 0 ]; then
        log_warn "Failed: $FAIL_COUNT component(s)"
    fi
}

main "$@"