#!/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 detection library
source "$SCRIPT_DIR/lib/detect-changes.sh" 2>/dev/null || {
    echo "Warning: detect-changes.sh not found, using basic detection"
}

# 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:-}"

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

detect_all_changes() {
    log_step "Detecting changed components..."

    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"
        return
    fi

    local COMPONENTS=""

    # Status Dashboard
    if echo "$CHANGED_FILES" | grep -q "features/status-dashboard/"; then
        COMPONENTS="$COMPONENTS status-dashboard"
    fi

    # Service Registry
    if echo "$CHANGED_FILES" | grep -q "infrastructure/service-registry/"; then
        COMPONENTS="$COMPONENTS service-registry"
    fi

    # UI packages (affects both)
    if echo "$CHANGED_FILES" | grep -q "@packages/@ui/"; then
        if ! echo "$COMPONENTS" | grep -q "status-dashboard"; then
            COMPONENTS="$COMPONENTS status-dashboard"
        fi
        if ! echo "$COMPONENTS" | grep -q "service-registry"; then
            COMPONENTS="$COMPONENTS service-registry"
        fi
    fi

    echo "$COMPONENTS" | tr ' ' '\n' | grep -v '^$' | sort -u | tr '\n' ' '
}

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

deploy_component() {
    local component="$1"

    log_step "Deploying: $component"

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

    case "$component" in
        status-dashboard)
            if [ -x "$SCRIPT_DIR/deploy-status-dashboard.sh" ]; then
                "$SCRIPT_DIR/deploy-status-dashboard.sh" --full || {
                    log_warn "status-dashboard deployment failed (continuing)"
                    return 1
                }
            else
                log_error "deploy-status-dashboard.sh not found"
                return 1
            fi
            ;;
        service-registry)
            if [ -x "$SCRIPT_DIR/deploy-service-registry.sh" ]; then
                "$SCRIPT_DIR/deploy-service-registry.sh" --full || {
                    log_warn "service-registry deployment failed (continuing)"
                    return 1
                }
            else
                log_error "deploy-service-registry.sh not found"
                return 1
            fi
            ;;
        *)
            log_warn "Unknown component: $component (skipping)"
            ;;
    esac

    log_success "$component deployed"
}

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

main() {
    log_header "Rectifier Auto-Deploy"

    cd "$PROJECT_ROOT"

    # 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 "$@"