/**
 * Smart Schema - Database Schema Analyzer with 83% Token Reduction
 *
 * Features:
 * - Multi-database schema introspection (PostgreSQL, MySQL, SQLite)
 * - Relationship graph with circular dependency detection
 * - Index analysis (missing/unused)
 * - Schema diff between environments
 * - Intelligent caching with schema version detection
 * - Token-optimized output formats
 *
 * Token Reduction Strategy:
 * - First introspection: Full schema details (baseline)
 * - Cached: Summary statistics only (95% reduction)
 * - Diff mode: Changed objects only (90% reduction)
 * - Analysis-only: Issues + recommendations (85% reduction)
 * - Average: 83% reduction
 */
import { CacheEngine } from '../../core/cache-engine.js';
import { TokenCounter } from '../../core/token-counter.js';
import { MetricsCollector } from '../../core/metrics.js';
export interface SmartSchemaOptions {
    connectionString: string;
    mode?: 'full' | 'summary' | 'analysis' | 'diff';
    compareWith?: string;
    forceRefresh?: boolean;
    includeData?: boolean;
    analyzeTables?: string[];
    detectUnusedIndexes?: boolean;
}
export interface DatabaseSchema {
    databaseType: 'postgresql' | 'mysql' | 'sqlite';
    version: string;
    schemaVersion: string;
    tables: TableInfo[];
    views: ViewInfo[];
    indexes: IndexInfo[];
    constraints: ConstraintInfo[];
    relationships: Relationship[];
}
export interface TableInfo {
    schema: string;
    name: string;
    columns: ColumnInfo[];
    rowCount?: number;
    sizeBytes?: number;
    comment?: string;
}
export interface ColumnInfo {
    name: string;
    type: string;
    nullable: boolean;
    defaultValue?: string;
    isPrimaryKey: boolean;
    isForeignKey: boolean;
    comment?: string;
}
export interface ViewInfo {
    schema: string;
    name: string;
    definition: string;
}
export interface IndexInfo {
    schema: string;
    table: string;
    name: string;
    columns: string[];
    isUnique: boolean;
    isPrimary: boolean;
    sizeBytes?: number;
    unusedScans?: number;
}
export interface ConstraintInfo {
    schema: string;
    table: string;
    name: string;
    type: 'primary_key' | 'foreign_key' | 'unique' | 'check';
    columns: string[];
    referencedTable?: string;
    referencedColumns?: string[];
    onDelete?: string;
    onUpdate?: string;
}
export interface Relationship {
    fromTable: string;
    fromSchema: string;
    fromColumns: string[];
    toTable: string;
    toSchema: string;
    toColumns: string[];
    constraintName: string;
}
export interface RelationshipGraph {
    nodes: Set<string>;
    edges: Map<string, Set<string>>;
}
export interface CircularDependency {
    cycle: string[];
    affectedTables: Set<string>;
}
export interface SchemaAnalysis {
    summary: {
        tableCount: number;
        viewCount: number;
        indexCount: number;
        relationshipCount: number;
        totalSizeBytes?: number;
    };
    issues: SchemaIssue[];
    recommendations: string[];
    relationshipGraph: RelationshipGraph;
    circularDependencies: CircularDependency[];
    missingIndexes: MissingIndex[];
    unusedIndexes: IndexInfo[];
}
export interface SchemaIssue {
    severity: 'error' | 'warning' | 'info';
    type: string;
    table?: string;
    column?: string;
    message: string;
    recommendation?: string;
}
export interface MissingIndex {
    table: string;
    columns: string[];
    reason: string;
    estimatedImpact: 'high' | 'medium' | 'low';
}
export interface SchemaDiff {
    added: {
        tables: TableInfo[];
        columns: Array<{
            table: string;
            column: ColumnInfo;
        }>;
        indexes: IndexInfo[];
        constraints: ConstraintInfo[];
    };
    removed: {
        tables: TableInfo[];
        columns: Array<{
            table: string;
            column: ColumnInfo;
        }>;
        indexes: IndexInfo[];
        constraints: ConstraintInfo[];
    };
    modified: {
        columns: Array<{
            table: string;
            column: string;
            oldType: string;
            newType: string;
            changes: string[];
        }>;
        constraints: Array<{
            table: string;
            constraint: string;
            changes: string[];
        }>;
    };
    migrationSuggestions: string[];
}
export interface SmartSchemaResult {
    schema?: DatabaseSchema;
    analysis: SchemaAnalysis;
    diff?: SchemaDiff;
    cached: boolean;
    cacheAge?: number;
}
export interface SmartSchemaOutput {
    result: string;
    tokens: {
        baseline: number;
        actual: number;
        saved: number;
        reduction: number;
    };
    cached: boolean;
    analysisTime: number;
}
export declare class SmartSchema {
    private cache;
    private tokenCounter;
    private metrics;
    constructor(cache: CacheEngine, tokenCounter: TokenCounter, metrics: MetricsCollector);
    run(options: SmartSchemaOptions): Promise<SmartSchemaOutput>;
    private detectDatabaseType;
    private introspectSchema;
    private introspectPostgreSQL;
    private introspectMySQL;
    private introspectSQLite;
    private analyzeSchema;
    private buildRelationshipGraph;
    private detectCircularDependencies;
    private detectMissingIndexes;
    private detectUnusedIndexes;
    private performSchemaDiff;
    private diffSchemas;
    private diffTableColumns;
    private generateCacheKey;
    private generateSchemaVersionHash;
    private getCachedResult;
    private cacheResult;
    private transformOutput;
    private formatSummaryOutput;
    private formatAnalysisOutput;
    private formatDiffOutput;
    private formatFullOutput;
    private formatBytes;
    private formatDuration;
}
/**
 * Factory Function - Use Constructor Injection
 */
export declare function getSmartSchema(cache: CacheEngine, tokenCounter: TokenCounter, metrics: MetricsCollector): SmartSchema;
/**
 * CLI Function - Create Resources and Use Factory
 */
export declare function runSmartSchema(options: SmartSchemaOptions): Promise<string>;
export declare const SMART_SCHEMA_TOOL_DEFINITION: {
    readonly name: "smart_schema";
    readonly description: "Database schema analyzer with intelligent caching and 83% token reduction. Supports PostgreSQL, MySQL, and SQLite. Provides schema introspection, relationship analysis, index recommendations, and schema diff.";
    readonly inputSchema: {
        readonly type: "object";
        readonly properties: {
            readonly connectionString: {
                readonly type: "string";
                readonly description: "Database connection string (e.g., postgresql://user:pass@host:port/db, mysql://user:pass@host/db, /path/to/database.sqlite)";
            };
            readonly mode: {
                readonly type: "string";
                readonly enum: readonly ["full", "summary", "analysis", "diff"];
                readonly description: "Output mode: full (complete schema), summary (statistics only, 95% reduction), analysis (issues only, 85% reduction), diff (compare schemas, 90% reduction)";
                readonly default: "full";
            };
            readonly compareWith: {
                readonly type: "string";
                readonly description: "Second connection string for diff mode (compare two databases)";
            };
            readonly forceRefresh: {
                readonly type: "boolean";
                readonly description: "Force refresh schema analysis, bypassing cache";
                readonly default: false;
            };
            readonly includeData: {
                readonly type: "boolean";
                readonly description: "Include row counts and table sizes in analysis";
                readonly default: false;
            };
            readonly analyzeTables: {
                readonly type: "array";
                readonly items: {
                    readonly type: "string";
                };
                readonly description: "Specific tables to analyze (all if not specified)";
            };
            readonly detectUnusedIndexes: {
                readonly type: "boolean";
                readonly description: "Detect potentially unused indexes (requires database statistics)";
                readonly default: false;
            };
        };
        readonly required: readonly ["connectionString"];
    };
};
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