#!/bin/bash

set -euo pipefail

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

# Configuration
SHARED_RESOURCES=("redis" "file_system" "network_ports" "memory" "cpu")
CONFLICT_RESOLUTION_STRATEGIES=("queue_based_priority" "resource_isolation" "time_sharing" "fail_fast")

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

log() {
    echo -e "${GREEN}[$(date '+%Y-%m-%d %H:%M:%S')] $1${NC}"
}

warn() {
    echo -e "${YELLOW}[$(date '+%Y-%m-%d %H:%M:%S')] WARNING: $1${NC}"
}

error() {
    echo -e "${RED}[$(date '+%Y-%m-%d %H:%M:%S')] ERROR: $1${NC}"
    exit 1
}

info() {
    echo -e "${BLUE}[$(date '+%Y-%m-%d %H:%M:%S')] INFO: $1${NC}"
}

identify_shared_resources() {
    local zone_config="$1"
    local shared_resources_analysis="[]"

    # Analyze each zone for shared resource usage
    local i=0
    while IFS= read -r zone_name; do
        local zone_data
        zone_data=$(echo "$zone_config" | jq ".zones[$i]")

        local resource_usage="{
            \"zone\": \"$zone_name\",
            \"redis_usage\": \"isolated_namespace\",
            \"file_system_usage\": \"/tmp/zone-${zone_name}-*\",
            \"network_ports\": \"dynamic_allocation\",
            \"memory_requirement\": \"2GB\",
            \"cpu_requirement\": \"2_cores\"
        }"

        shared_resources_analysis=$(echo "$shared_resources_analysis" | jq ". + [$resource_usage]")
        ((i++))
    done < <(echo "$zone_config" | jq -r '.zones[].name')

    echo "$shared_resources_analysis"
}

detect_potential_conflicts() {
    local shared_resources="$1"
    local conflicts="[]"

    # Check for Redis key pattern conflicts
    local redis_patterns
    redis_patterns=$(echo "$shared_resources" | jq -r '.[].redis_usage')
    local unique_redis_patterns
    unique_redis_patterns=$(echo "$redis_patterns" | sort -u | wc -l)

    if [[ $unique_redis_patterns -lt $(echo "$shared_resources" | jq 'length') ]]; then
        local conflict="{
            \"type\": \"redis_namespace_collision\",
            \"severity\": \"high\",
            \"description\": \"Multiple zones may use overlapping Redis namespaces\",
            \"affected_zones\": $(echo "$shared_resources" | jq 'map(.zone)'),
            \"resolution_strategy\": \"namespace_isolation\"
        }"
        conflicts=$(echo "$conflicts" | jq ". + [$conflict]")
    fi

    # Check for file system path conflicts
    local file_patterns
    file_patterns=$(echo "$shared_resources" | jq -r '.[].file_system_usage')

    # Look for potential conflicts in temporary directories
    if echo "$file_patterns" | grep -q "/tmp/"; then
        local conflict="{
            \"type\": \"temporary_directory_conflict\",
            \"severity\": \"medium\",
            \"description\": \"Multiple zones using /tmp directory may conflict\",
            \"affected_zones\": $(echo "$shared_resources" | jq 'map(.zone)'),
            \"resolution_strategy\": \"zone_specific_subdirectories\"
        }"
        conflicts=$(echo "$conflicts" | jq ". + [$conflict]")
    fi

    # Check for network port conflicts
    local network_usage
    network_usage=$(echo "$shared_resources" | jq -r '.[].network_ports')

    if echo "$network_usage" | grep -q "dynamic"; then
        local conflict="{
            \"type\": \"dynamic_port_allocation_conflict\",
            \"severity\": \"low\",
            \"description\": \"Dynamic port allocation may cause conflicts\",
            \"affected_zones\": $(echo "$shared_resources" | jq 'map(.zone)'),
            \"resolution_strategy\": \"port_range_reservation\"
        }"
        conflicts=$(echo "$conflicts" | jq ". + [$conflict]")
    fi

    echo "$conflicts"
}

analyze_dependencies() {
    local zone_config="$1"
    local dependencies="[]"

    # Check for cross-zone dependencies in task descriptions
    local i=0
    while IFS= read -r zone_name; do
        local zone_data
        zone_data=$(echo "$zone_config" | jq ".zones[$i]")
        local task_description
        task_description=$(echo "$zone_data" | jq -r '.task_description // ""')

        # Look for dependency keywords
        local dependency_patterns=("depends on" "requires" "after" "waits for" "needs")
        local found_dependencies="[]"

        for pattern in "${dependency_patterns[@]}"; do
            if [[ "$task_description" =~ $pattern ]]; then
                # Extract potential dependency target
                local dependency_target
                dependency_target=$(echo "$task_description" | grep -o "$pattern [^.]*" | sed "s/$pattern //" | xargs)

                if [[ -n "$dependency_target" ]]; then
                    found_dependencies=$(echo "$found_dependencies" | jq ". + [\"$dependency_target\"]")
                fi
            fi
        done

        if [[ "$(echo "$found_dependencies" | jq 'length')" -gt 0 ]]; then
            local dependency_entry="{
                \"zone\": \"$zone_name\",
                \"dependencies\": $found_dependencies,
                \"dependency_type\": \"explicit_text\"
            }"
            dependencies=$(echo "$dependencies" | jq ". + [$dependency_entry]")
        fi

        ((i++))
    done < <(echo "$zone_config" | jq -r '.zones[].name')

    echo "$dependencies"
}

create_resolution_strategies() {
    local conflicts="$1"
    local strategies="{}"

    local conflict_count
    conflict_count=$(echo "$conflicts" | jq 'length')

    for ((i=0; i<conflict_count; i++)); do
        local conflict
        conflict=$(echo "$conflicts" | jq ".[$i]")
        local conflict_type
        conflict_type=$(echo "$conflict" | jq -r '.type')
        local resolution_strategy
        resolution_strategy=$(echo "$conflict" | jq -r '.resolution_strategy')

        case "$conflict_type" in
            "redis_namespace_collision")
                local strategy="{
                    \"approach\": \"namespace_isolation\",
                    \"implementation\": \"zone_specific_redis_databases\",
                    \"priority\": \"high\",
                    \"estimated_effort\": \"low\",
                    \"success_probability\": 0.95
                }"
                ;;
            "temporary_directory_conflict")
                local strategy="{
                    \"approach\": \"zone_specific_subdirectories\",
                    \"implementation\": \"timestamped_zone_directories\",
                    \"priority\": \"medium\",
                    \"estimated_effort\": \"low\",
                    \"success_probability\": 0.90
                }"
                ;;
            "dynamic_port_allocation_conflict")
                local strategy="{
                    \"approach\": \"port_range_reservation\",
                    \"implementation\": \"pre_allocated_port_ranges_per_zone\",
                    \"priority\": \"low\",
                    \"estimated_effort\": \"medium\",
                    \"success_probability\": 0.85
                }"
                ;;
            *)
                local strategy="{
                    \"approach\": \"monitor_and_remediate\",
                    \"implementation\": \"runtime_detection_and_correction\",
                    \"priority\": \"medium\",
                    \"estimated_effort\": \"high\",
                    \"success_probability\": 0.70
                }"
                ;;
        esac

        strategies=$(echo "$strategies" | jq ".[\"$conflict_type\"] = $strategy")
    done

    echo "$strategies"
}

create_completion_pathways() {
    local zone_config="$1"
    local pathways="[]"

    local i=0
    while IFS= read -r zone_name; do
        local zone_data
        zone_data=$(echo "$zone_config" | jq ".zones[$i]")

        local pathway="{
            \"zone\": \"$zone_name\",
            \"normal_flow\": [
                \"agent_completion\",
                \"coordinator_processing\",
                \"main_chat_notification\"
            ],
            \"failure_flows\": {
                \"agent_timeout\": [
                    \"timeout_detection\",
                    \"agent_cleanup\",
                    \"coordinator_restart_or_abort\"
                ],
                \"coordinator_failure\": [
                    \"failure_detection\",
                    \"context_preservation\",
                    \"coordinator_restart\",
                    \"work_resumption\"
                ],
                \"namespace_corruption\": [
                    \"corruption_detection\",
                    \"emergency_stop\",
                    \"context_recovery\",
                    \"coordinator_restart\"
                ]
            },
            \"escalation_triggers\": [
                \"multiple_agent_failures\",
                \"repeated_timeout_cycles\",
                \"resource_exhaustion\"
            ]
        }"

        pathways=$(echo "$pathways" | jq ". + [$pathway]")
        ((i++))
    done < <(echo "$zone_config" | jq -r '.zones[].name')

    echo "$pathways"
}

generate_dependency_conflict_plan() {
    local zone_config="$1"

    info "Analyzing dependencies and conflicts for multi-coordinator execution"

    # Identify shared resources
    local shared_resources
    shared_resources=$(identify_shared_resources "$zone_config")

    # Detect potential conflicts
    local conflicts
    conflicts=$(detect_potential_conflicts "$shared_resources")

    # Analyze dependencies
    local dependencies
    dependencies=$(analyze_dependencies "$zone_config")

    # Create resolution strategies
    local resolution_strategies
    resolution_strategies=$(create_resolution_strategies "$conflicts")

    # Create completion pathways
    local completion_pathways
    completion_pathways=$(create_completion_pathways "$zone_config")

    # Generate complete analysis plan
    local analysis_plan="{
        \"timestamp\": $(date '+%s'),
        \"zone_count\": $(echo "$zone_config" | jq '.zones | length'),
        \"shared_resources_analysis\": $shared_resources,
        \"detected_conflicts\": $conflicts,
        \"dependency_analysis\": $dependencies,
        \"resolution_strategies\": $resolution_strategies,
        \"completion_pathways\": $completion_pathways,
        \"recommendations\": {
            \"isolation_level\": \"zone_based\",
            \"monitoring_priority\": \"high\",
            \"auto_recovery_enabled\": true,
            \"manual_intervention_points\": [\"critical_conflicts\", \"escalation_triggers\"]
        }
    }"

    echo "$analysis_plan"
}

display_analysis_summary() {
    local analysis_plan="$1"

    echo
    info "=== Dependencies & Conflicts Analysis ==="
    echo "Zones analyzed: $(echo "$analysis_plan" | jq -r '.zone_count')"
    echo "Shared resources identified: $(echo "$analysis_plan" | jq -r '.shared_resources_analysis | length')"
    echo "Potential conflicts detected: $(echo "$analysis_plan" | jq -r '.detected_conflicts | length')"
    echo "Dependencies found: $(echo "$analysis_plan" | jq -r '.dependency_analysis | length')"
    echo

    if [[ "$(echo "$analysis_plan" | jq -r '.detected_conflicts | length')" -gt 0 ]]; then
        echo "Conflict Summary:"
        echo "$analysis_plan" | jq -r '.detected_conflicts[] | "  - \(.type): \(.description) (severity: \(.severity))"'
        echo
    fi

    echo "Resolution Strategies:"
    echo "$analysis_plan" | jq -r '.resolution_strategies | to_entries[] | "  - \(.key): \(.value.approach) (\(.value.success_probability * 100)% success)"'
    echo

    echo "Recommendations:"
    echo "  - Isolation level: $(echo "$analysis_plan" | jq -r '.recommendations.isolation_level')"
    echo "  - Monitoring priority: $(echo "$analysis_plan" | jq -r '.recommendations.monitoring_priority')"
    echo "  - Auto recovery: $(echo "$analysis_plan" | jq -r '.recommendations.auto_recovery_enabled')"
    echo
}

main() {
    local config_file="$1"

    if [[ -z "$config_file" ]]; then
        error "Usage: $0 <zone-config-file>"
    fi

    if [[ ! -f "$config_file" ]]; then
        error "Configuration file not found: $config_file"
    fi

    log "Starting dependency and conflict analysis for: $config_file"

    # Read configuration
    local zone_config
    if ! zone_config=$(jq . "$config_file" 2>/dev/null); then
        error "Invalid JSON in configuration file: $config_file"
    fi

    # Generate analysis plan
    local analysis_plan
    analysis_plan=$(generate_dependency_conflict_plan "$zone_config")

    # Save analysis plan
    local output_file="/tmp/dependency-conflict-analysis-$(date '+%s').json"
    echo "$analysis_plan" > "$output_file"

    log "✅ Dependency and conflict analysis completed"
    log "Analysis plan saved to: $output_file"

    # Display summary
    display_analysis_summary "$analysis_plan"
}

# Execute main function with all arguments
main "$@"