// ── altimate-core TypeScript type definitions ────────────────────────
// These interfaces mirror the JSON shapes returned by altimate-core.
// All field names are snake_case (Rust default serialization).

// ── Shared / Utility ──────────────────────────────────────────────────

export interface SourceLocation {
  line: number
  column: number
}

// ── Validation ────────────────────────────────────────────────────────

export type ErrorCode = 'E000' | 'E001' | 'E002' | 'E003' | 'E004' | 'E005' | 'E006' | 'E099'

export type ErrorKind =
  | { type: 'SyntaxError' }
  | { type: 'TableNotFound'; table: string }
  | { type: 'ColumnNotFound'; table: string | null; column: string }
  | { type: 'TypeMismatch'; expected: string; found: string }
  | { type: 'AmbiguousColumn'; column: string; candidates: string[] }
  | { type: 'InvalidJoin'; reason: string }
  | { type: 'UnsupportedDialectFeature'; feature: string; dialect: string }
  | { type: 'Other'; detail: string }

export type SuggestionKind =
  | { type: 'DidYouMean'; name: string }
  | { type: 'AddQualification'; qualified: string }
  | { type: 'UseAlternative'; alternative: string }

export interface Suggestion {
  kind: SuggestionKind
  message: string
  confidence: number
}

export interface ValidationError {
  code: ErrorCode
  kind: ErrorKind
  message: string
  location: SourceLocation | null
  suggestions: Suggestion[]
}

export interface ValidationWarning {
  code: string
  message: string
  location: SourceLocation | null
}

export type Complexity = 'low' | 'medium' | 'high'

export interface QueryMetadata {
  tables_referenced: string[]
  join_count: number
  has_aggregation: boolean
  has_subquery: boolean
  complexity: Complexity
}

export interface ValidationResult {
  valid: boolean
  errors: ValidationError[]
  warnings: ValidationWarning[]
  metadata: QueryMetadata
}

// ── Explanation ───────────────────────────────────────────────────────

export type JoinKind =
  | 'inner' | 'left' | 'right' | 'full' | 'cross'
  | 'left_semi' | 'left_anti' | 'right_semi' | 'right_anti'

export interface SortKey {
  column: string
  direction: 'asc' | 'desc'
  nulls_first: boolean
}

export type PlanOperation =
  | { type: 'table_scan'; table: string; columns_read: string[]; filters: string[] }
  | { type: 'join'; join_type: JoinKind; left: string; right: string; condition: string }
  | { type: 'filter'; predicate: string }
  | { type: 'aggregate'; group_by: string[]; functions: string[] }
  | { type: 'sort'; order_by: SortKey[] }
  | { type: 'limit'; limit?: number; offset?: number }
  | { type: 'projection'; columns: string[] }
  | { type: 'window'; function: string; partition_by: string[]; order_by: string[] }
  | { type: 'subquery'; alias: string; inner_steps: PlanStep[] }
  | { type: 'union'; all: boolean; branches: number }
  | { type: 'distinct' }
  | { type: 'empty_relation' }

export interface PlanStep {
  step: number
  operation: PlanOperation
  notes?: string
}

export interface ColumnRef {
  table: string
  column: string
}

export type ColumnSource =
  | { type: 'direct_ref'; table: string; column: string }
  | { type: 'aggregation'; function: string }
  | { type: 'expression'; expr: string }
  | { type: 'window_function'; function: string }
  | { type: 'literal'; value: string }

export interface OutputColumn {
  alias: string
  source: ColumnSource
}

export interface JoinEdge {
  left_table: string
  right_table: string
  join_type: JoinKind
  on_columns: [string, string][]
}

export interface QueryLineage {
  tables: string[]
  columns_read: ColumnRef[]
  columns_output: OutputColumn[]
  join_graph: JoinEdge[]
}

export type QueryComplexity = 'low' | 'moderate' | 'high' | 'extreme'
export type RiskSeverity = 'info' | 'warning' | 'critical'

export interface RiskFlag {
  severity: RiskSeverity
  flag: string
  detail: string
}

export type SuggestionType =
  | 'add_filter' | 'add_limit' | 'avoid_cross_join' | 'remove_select_star'
  | 'use_specific_columns' | 'remove_redundant_distinct' | 'consider_index'

export type SuggestionPriority = 'low' | 'medium' | 'high'

export interface OptimizationSuggestion {
  kind: SuggestionType
  message: string
  priority: SuggestionPriority
}

export interface CostSignals {
  complexity: QueryComplexity
  complexity_score: number
  join_count: number
  has_aggregation: boolean
  has_subquery: boolean
  has_window_function: boolean
  has_limit: boolean
  has_cross_join: boolean
  uses_select_star: boolean
  has_distinct: boolean
  has_union: boolean
  table_count: number
  filter_count: number
  unfiltered_scans: string[]
  risk_flags: RiskFlag[]
}

export interface QueryExplanation {
  summary: string
  plan_steps: PlanStep[]
  lineage: QueryLineage
  cost_signals: CostSignals
  suggestions: OptimizationSuggestion[]
}

export interface ValidationSummary {
  error_count: number
  warning_count: number
  errors: ValidationError[]
  warnings: ValidationWarning[]
}

export interface AnalysisMetadata {
  dialect: string
  plan_node_count: number
  analysis_time_ms: number
}

export interface ExplanationResult {
  valid: boolean
  explanation?: QueryExplanation
  validation: ValidationSummary
  metadata: AnalysisMetadata
}

// ── Fix ───────────────────────────────────────────────────────────────

export type FixActionType =
  | 'replace_table' | 'replace_column' | 'qualify_column'
  | 'remove_alias' | 'add_alias' | 'use_alternative'

export interface FixAction {
  action: FixActionType
  original: string
  replacement: string
  confidence: number
  explanation: string
  location?: SourceLocation
}

export interface UnfixableError {
  error: ValidationError
  reason: string
}

export interface FixResult {
  original_sql: string
  fixed: boolean
  fixed_sql: string
  fixes_applied: FixAction[]
  unfixable_errors: UnfixableError[]
  post_fix_valid: boolean
  iterations: number
  fix_time_ms: number
}

// ── Policy / Guardrails ───────────────────────────────────────────────

export type PolicyCategory = 'cost_control' | 'data_protection' | 'query_patterns' | 'tag_rules' | 'custom'
export type ViolationSeverity = 'error' | 'warning' | 'info'

export type ViolationDetail =
  | { type: 'blocked_column'; table: string; column: string }
  | { type: 'blocked_table'; table: string }
  | { type: 'exceeded_limit'; metric: string; limit: number; actual: number }
  | { type: 'blocked_statement'; statement: string }
  | { type: 'blocked_pattern'; pattern: string }
  | { type: 'tag_violation'; tag: string; table: string; column: string }
  | { type: 'custom_rule'; detail: string }

export interface PolicyViolation {
  rule: string
  category: PolicyCategory
  severity: ViolationSeverity
  message: string
  remediation?: string
  detail: ViolationDetail
}

export interface PolicyWarning {
  rule: string
  category: PolicyCategory
  message: string
}

export interface AuditEntry {
  timestamp: string
  sql_hash: string
  allowed: boolean
  violation_count: number
  warning_count: number
  policies_checked: number
  evaluation_time_ms: number
}

export interface PolicyResult {
  allowed: boolean
  violations: PolicyViolation[]
  warnings: PolicyWarning[]
  policies_evaluated: number
  audit: AuditEntry
}

// ── Lint ──────────────────────────────────────────────────────────────

export type LintSeverity = 'error' | 'warning' | 'info'

export interface LintFinding {
  code: string
  rule: string
  severity: LintSeverity
  message: string
  suggestion?: string
  line?: number
  column?: number
}

export interface LintResult {
  sql: string
  findings: LintFinding[]
  error_count: number
  warning_count: number
  clean: boolean
}

// ── Safety ────────────────────────────────────────────────────────────

export type SafetyRule =
  | 'multi_statement' | 'union_injection' | 'comment_injection' | 'transaction_escape'
  | 'stacked_queries' | 'tautology_attack' | 'sleep_attack' | 'info_schema_probe'
  | 'string_concat_predicate' | 'encoding_bypass'

export type SafetySeverity = 'low' | 'medium' | 'high' | 'critical'

export interface ThreatFinding {
  rule: SafetyRule
  severity: SafetySeverity
  message: string
  detail: string
  location?: [number, number]
  matched_pattern: string
}

export interface SafetyScanResult {
  safe: boolean
  threats: ThreatFinding[]
  risk_score: number
  statement_count: number
  statement_types: string[]
}

// ── PII ───────────────────────────────────────────────────────────────

export type PiiClassification =
  | 'Email' | 'Phone' | 'SSN' | 'Name' | 'Address'
  | 'Financial' | 'Health' | 'DateOfBirth' | 'IPAddress'
  | { Custom: string } | 'None'

export type PiiRiskLevel = 'None' | 'Low' | 'Medium' | 'High'

export interface PiiColumnResult {
  table: string
  column: string
  classification: PiiClassification
  confidence: number
  detection_method: string
  suggested_masking: string | null
}

export interface PiiReport {
  columns: PiiColumnResult[]
  pii_count: number
  total_columns: number
  risk_level: PiiRiskLevel
}

export interface PiiColumnAccess {
  table: string
  column: string
  query_targets: string[]
  classification: PiiClassification
  suggested_masking: string | null
}

export interface PiiQueryResult {
  accesses_pii: boolean
  pii_columns: PiiColumnAccess[]
  suggested_alternatives: string[]
  risk_level: PiiRiskLevel
}

// ── Semantic ──────────────────────────────────────────────────────────

export type SemanticSeverity = 'error' | 'warning' | 'info'

export interface SemanticFinding {
  rule: string
  severity: SemanticSeverity
  message: string
  explanation: string
  suggestion?: string
  confidence: number
}

export interface SemanticResult {
  valid: boolean
  semantic_score: number
  findings: SemanticFinding[]
  passed_checks: string[]
  validation_errors: string[]
}

// ── Equivalence ───────────────────────────────────────────────────────

export type DiffSeverity = 'structural' | 'semantic' | 'minor'

export interface EquivalenceDiff {
  aspect: string
  description: string
  severity: DiffSeverity
}

export interface EquivalenceResult {
  equivalent: boolean
  confidence: number
  differences: EquivalenceDiff[]
  output_compatible: boolean
  decidable: boolean
  validation_errors: string[]
}

// ── Correction ────────────────────────────────────────────────────────

export type CorrectionStatus = 'already_valid' | 'fixed' | 'partial_fix' | 'unfixable'
export type IterationResult = 'fixed' | 'still_invalid' | 'new_errors' | 'skipped'

export interface CorrectionIteration {
  iteration: number
  input_sql: string
  validation_errors: string[]
  fix_applied?: string
  fix_description?: string
  result: IterationResult
}

export interface QualityScore {
  syntax_valid: boolean
  lint_score: number
  safety_score: number
  complexity_score: number
  overall: number
}

export interface CorrectionResult {
  status: CorrectionStatus
  original_sql: string
  corrected_sql?: string
  iterations: CorrectionIteration[]
  final_validation?: any
  final_score: QualityScore
  total_time_ms: number
}

// ── Evaluation / Observability ────────────────────────────────────────

export type Grade = 'A' | 'B' | 'C' | 'D' | 'F'

export interface QualityScorecard {
  syntax: number
  style: number
  safety: number
  complexity: number
  overall: number
}

export interface EvalResult {
  sql: string
  scores: QualityScorecard
  validation?: any
  lint?: any
  safety?: any
  explain?: any
  overall_grade: Grade
  total_time_ms: number
}

// ── Polyglot ──────────────────────────────────────────────────────────

export interface TranspileResult {
  original_sql: string
  source_dialect: string
  target_dialect: string
  transpiled_sql: string[]
  success: boolean
  error?: string
}

export interface FormatResult {
  original_sql: string
  formatted_sql: string
  dialect: string
  success: boolean
  error?: string
}

export interface ExtractResult {
  tables: string[]
  columns: string[]
  functions: string[]
  has_subqueries: boolean
  has_aggregation: boolean
  has_window_functions: boolean
  node_count: number
}

export interface DiffEntry {
  change_type: string
  description: string
}

export interface CompareResult {
  identical: boolean
  diff_count: number
  diffs: DiffEntry[]
}

export type StatementCategory = 'query' | 'dml' | 'ddl' | 'dcl' | 'tcl' | 'other'

export interface StatementInfo {
  /** Statement type, e.g. "SELECT", "INSERT", "CREATE TABLE" */
  statement_type: string
  /** Broad category of the statement */
  category: StatementCategory
}

export interface StatementTypesResult {
  /** One entry per parsed statement */
  statements: StatementInfo[]
  /** Total number of statements found */
  statement_count: number
  /** Deduplicated statement types found, e.g. ["SELECT", "DELETE"] */
  types: string[]
  /** Deduplicated categories found, e.g. ["query", "dml"] */
  categories: StatementCategory[]
}

// ── Completion ────────────────────────────────────────────────────────

export type CompletionKind = 'table' | 'column' | 'function' | 'keyword' | 'alias' | 'join_condition' | 'schema'

export interface CompletionItem {
  label: string
  kind: CompletionKind
  detail: string
  documentation?: string
  score: number
}

export interface CompletionResult {
  cursor_offset: number
  context: string
  items: CompletionItem[]
}

// ── Rewrite ───────────────────────────────────────────────────────────

export interface RewriteSuggestion {
  rule: string
  explanation: string
  rewritten_sql: string
  improvement: string
  confidence: number
}

export interface IndexSuggestion {
  table: string
  columns: string[]
  reason: string
  ddl: string
}

export interface RewriteResult {
  original_sql: string
  suggestions: RewriteSuggestion[]
  index_suggestions: IndexSuggestion[]
}

// ── Test Generation ───────────────────────────────────────────────────

export type TestExpectation = 'returns_rows' | 'returns_empty' | 'should_error' | { row_count: number }

export interface TestInput {
  column: string
  value: string
  data_type: string
}

export interface TestCase {
  name: string
  category: string
  description: string
  inputs: TestInput[]
  expected: TestExpectation
}

export interface TestGenResult {
  sql: string
  test_cases: TestCase[]
  columns_analyzed: string[]
  tables_referenced: string[]
}

// ── Migration ─────────────────────────────────────────────────────────

export type MigrationRisk = 'safe' | 'caution' | 'dangerous' | 'destructive'

export interface MigrationFinding {
  risk: MigrationRisk
  operation: string
  message: string
  mitigation?: string
  rollback_sql?: string
}

export interface MigrationResult {
  sql: string
  overall_risk: MigrationRisk
  findings: MigrationFinding[]
  safe: boolean
  rollback_sql?: string
}

// ── dbt ───────────────────────────────────────────────────────────────

export interface DbtSourceRef {
  source_name: string
  table_name: string
}

export interface DbtModel {
  name: string
  path: string
  sql: string
  raw_sql: string
  materialization?: string
  description?: string
  refs: string[]
  sources: DbtSourceRef[]
}

export interface DbtProject {
  name: string
  models: DbtModel[]
  build_order: string[]
  warnings: string[]
}

// ── Lineage ───────────────────────────────────────────────────────────

export type LineageType = 'direct' | 'indirect'
export type LensClassification = 'Original' | 'Alias' | 'Transformation' | 'Not sure' | 'Non select'

export interface LensStep {
  expression: string
  step_type: string
}

export interface LineageEntry {
  source: string
  target: string
  lineage_type: LineageType
  lens_type: LensClassification
  lens_code: LensStep[]
}

export interface CompleteLineageResult {
  column_dict: Record<string, string[]>
  column_lineage: LineageEntry[]
  source_tables: string[]
  errors: string[]
  default_database: string | null
  default_schema: string | null
}

export interface LineageColumnRef {
  table: string
  column: string
}

export interface LineageEdge {
  source: LineageColumnRef
  target: LineageColumnRef
  transform_type: string
}

export interface LineageQueryInfo {
  source_tables: string[]
  target_tables: string[]
  edges: LineageEdge[]
  output_columns: string[]
}

export interface ImpactEntry {
  source: LineageColumnRef
  affected: LineageColumnRef[]
}

export interface LineageResult {
  queries: LineageQueryInfo[]
  dependency_order: string[]
  impact_map: ImpactEntry[]
}

// ── Context ───────────────────────────────────────────────────────────

export type DisclosureLevel = 'fingerprint' | 'table_list' | 'column_names' | 'full_relevant' | 'full'

export interface ContextResult {
  compressed_schema: string
  level_used: DisclosureLevel
  estimated_tokens: number
  tables_included: number
  tables_total: number
  compression_ratio: number
  fingerprint: string
}

// ── Schema Diff ───────────────────────────────────────────────────────

export type SchemaChange =
  | { type: 'table_added'; table: string }
  | { type: 'table_removed'; table: string }
  | { type: 'column_added'; table: string; column: string; data_type: string }
  | { type: 'column_removed'; table: string; column: string }
  | { type: 'column_type_changed'; table: string; column: string; old_type: string; new_type: string }
  | { type: 'nullability_changed'; table: string; column: string; old_nullable: boolean; new_nullable: boolean }

export interface SchemaDiff {
  changes: SchemaChange[]
  has_breaking_changes: boolean
  summary: string
}

// ── Schema Definition (pruned) ────────────────────────────────────────

export interface McvEntry {
  value: string
  frequency: number
}

export interface ColumnStatistics {
  n_distinct?: number
  null_fraction?: number
  min_value?: string
  max_value?: string
  most_common_values?: McvEntry[]
  avg_bytes?: number
  compression_ratio?: number
}

export interface ForeignKeyRef {
  table: string
  columns: string[]
}

export interface ForeignKeyDef {
  columns: string[]
  references: ForeignKeyRef
}

export interface TableStatistics {
  row_count?: number
  avg_row_bytes?: number
  partitioned?: boolean
  partition_columns?: string[]
  correlated_columns?: string[][]
  partition_count?: number
  total_bytes?: number
  historical_scan_median?: number
}

export interface ColumnDef {
  name: string
  type: string
  nullable: boolean
  description?: string
  tags?: string[]
  synonyms?: string[]
  statistics?: ColumnStatistics
}

export interface TableDef {
  description?: string
  database?: string
  schema?: string
  columns: ColumnDef[]
  primary_key?: string[]
  foreign_keys?: ForeignKeyDef[]
  statistics?: TableStatistics
  clustering_keys?: string[]
}

export interface SchemaDefinition {
  version: string
  dialect: string
  database: string | null
  schema_name: string | null
  tables: Record<string, TableDef>
  glossary?: any
}

// ── Introspection ─────────────────────────────────────────────────────

export interface IntrospectionSql {
  database_type: string
  columns_query: string
  primary_keys_query: string
  foreign_keys_query: string
}

// ── Glossary ──────────────────────────────────────────────────────────

export interface ColumnReference {
  table: string
  column: string
}

export type MatchSource = 'ExactTerm' | 'Synonym' | 'Description' | 'FuzzyName' | 'ColumnSynonym'

export interface GlossaryMatch {
  term: string
  matched_column: ColumnReference | null
  matched_definition: string | null
  confidence: number
  source: MatchSource
}

/**
 * Cooperative DataParity state machine — emits SQL tasks, never touches databases.
 *
 * Create with a JSON spec, then loop: `start()` → execute SQL → `step(responses)` → repeat.
 *
 * The session holds mutable state between calls and must not be shared across threads.
 */
export declare class DataParitySession {
  /**
   * Create a new DataParity session from a JSON spec string.
   *
   * The spec must conform to `SessionSpec`:
   * ```json
   * {
   *   "table1": { "table": "source_table", "database": "db", "schema": "schema" },
   *   "table2": { "table": "target_table" },
   *   "dialect1": "Postgres",
   *   "dialect2": "Snowflake",
   *   "config": {
   *     "algorithm": "auto",
   *     "key_columns": ["id"],
   *     "extra_columns": ["name", "email"],
   *     "numeric_tolerance": null,
   *     "timestamp_tolerance_ms": null
   *   }
   * }
   * ```
   */
  constructor(specJson: string)
  /**
   * Begin the comparison. Returns the first action as a JSON string.
   *
   * Returns one of:
   * - `{ "type": "ExecuteSql", "tasks": [{ "id", "table_side", "sql", "expected_shape" }] }`
   * - `{ "type": "Done", "outcome": { ... } }`
   * - `{ "type": "Error", "message": "..." }`
   */
  start(): string
  /**
   * Process SQL responses and return the next action as a JSON string.
   *
   * `responses_json` must be a JSON array of `SqlResponse` objects:
   * ```json
   * [
   *   { "id": "fp1_1", "rows": [["42", "abc123"]] },
   *   { "id": "fp2_1", "rows": [["42", "abc123"]] }
   * ]
   * ```
   *
   * Each element of `rows` is an array of nullable string values (one per column).
   */
  step(responsesJson: string): string
}
export type ReladiffSessionNode = DataParitySession

/**
 * Schema definition for SQL validation.
 *
 * Load from YAML, JSON, file, or DDL. Pass to validation functions.
 */
export declare class Schema {
  /** Load schema from a YAML string. */
  static fromYaml(yamlStr: string): Schema
  /** Load schema from a JSON string. */
  static fromJson(jsonStr: string): Schema
  /** Load schema from a YAML or JSON file (auto-detected by extension). */
  static fromFile(path: string): Schema
  /** Load schema from a YAML file. */
  static fromYamlFile(path: string): Schema
  /** Parse DDL statements into a schema. */
  static fromDdl(ddl: string, dialect?: string | undefined | null): Schema
  /** Return all table names in the schema. */
  tableNames(): Array<string>
  /** Return column names for a specific table, or null if table not found. */
  columnNames(table: string): Array<string> | null
  /** Serialize the schema to a JSON object. */
  toJson(): SchemaDefinition
  /** Serialize the schema to a JSON string. */
  toString(): string
  /** Number of tables in the schema. */
  get length(): number
}

/** Analyze migration safety (data loss, type narrowing, missing defaults). */
export declare function analyzeMigration(sql: string, schema: Schema): MigrationResult

/** Analyze SQL for anti-pattern tags. */
export declare function analyzeTags(sql: string, dialect: string, skipTags?: Array<string> | undefined | null): any

/**
 * Check two SQL queries for semantic equivalence.
 *
 * `dialect` is an optional parsing-dialect hint (e.g. `"duckdb"`, `"snowflake"`,
 * `"bigquery"`, `"postgres"`) that overrides the dialect declared on the schema.
 * Pass it when comparing compiled warehouse SQL whose schema carries no dialect, so
 * dialect-specific syntax parses and the pair is decidable instead of abstaining.
 */
export declare function checkEquivalence(sqlA: string, sqlB: string, schema: Schema, dialect?: string | undefined | null): Promise<EquivalenceResult>

/** Check SQL against policy guardrails. `policyJson` is a JSON string of PolicyConfig. */
export declare function checkPolicy(sql: string, schema: Schema, policyJson: string): Promise<PolicyResult>

/** Check if a query accesses PII columns. */
export declare function checkQueryPii(sql: string, schema: Schema): PiiQueryResult

/** Run semantic validation rules (cartesian products, wrong JOINs, NULL misuse). */
export declare function checkSemantics(sql: string, schema: Schema): Promise<SemanticResult>

/** Classify schema columns for PII exposure. */
export declare function classifyPii(schema: Schema): PiiReport

/**
 * Compute column-level lineage for a SQL query.
 *
 * Returns an object with `column_dict` (output->sources mapping),
 * `column_lineage` (detailed edge list), `tier`, and `depth`.
 *
 * Pass `defaultDatabase` and `defaultSchema` to qualify unqualified table
 * references (important for Snowflake lineage matching).
 *
 * The `depth` parameter controls how much detail is returned:
 * - `"basic"`: direct source→target edges only
 * - `"deep"`: includes transformation metadata
 * - `"full"` (default): everything including indirect edges
 */
export declare function columnLineage(sql: string, dialect?: string | undefined | null, schema?: Schema | undefined | null, defaultDatabase?: string | undefined | null, defaultSchema?: string | undefined | null, depth?: string | undefined | null): CompleteLineageResult

/** Compare two SQL queries structurally. */
export declare function compareQueries(leftSql: string, rightSql: string, dialect?: string | undefined | null): CompareResult

/** SQL completion engine: suggest tables, columns, functions, keywords at cursor position. */
export declare function complete(sql: string, cursorPos: number, schema: Schema): CompletionResult

/** Iterative correction protocol: propose-verify-refine loop. */
export declare function correct(sql: string, schema: Schema): Promise<CorrectionResult>

/** Diff two model versions' configs (the `*_change` rules, e.g. materialization flip). */
export declare function dbtConfigDiff(baseSql: string, headSql: string): string

/**
 * dbt config/Jinja lint over a RAW model (parses `{{ config() }}` via minijinja).
 * Returns JSON array of LintFindings (DBT001 incremental-no-guard, DBT002
 * incremental-no-unique-key, DBT003 microbatch-lookahead, DBT004 contract, DBT005 var-no-default).
 */
export declare function dbtConfigLint(sql: string): string

/**
 * Compute diff-aware column lineage between two SQL queries.
 *
 * Returns an object with `added_columns`, `removed_columns`,
 * `modified_columns`, `affected_downstream`, `before`, and `after`.
 */
export declare function diffLineage(beforeSql: string, afterSql: string, dialect?: string | undefined | null, schema?: Schema | undefined | null, defaultDatabase?: string | undefined | null, defaultSchema?: string | undefined | null, depth?: string | undefined | null): DiffLineageResult

/** Diff two schemas with breaking change detection. */
export declare function diffSchemas(oldSchema: Schema, newSchema: Schema): SchemaDiff

/** SQL quality scoring and grading (A-F scale). */
export declare function evaluate(sql: string, schema: Schema): Promise<EvalResult>

/** Explain a SQL query: plan steps, column lineage, cost signals. */
export declare function explain(sql: string, schema: Schema): Promise<ExplanationResult>

/** Export schema as CREATE TABLE DDL statements. */
export declare function exportDdl(schema: Schema): string

/**
 * Extract a model's grain key (final-SELECT GROUP BY + dedup PARTITION BY) from
 * its compiled SQL, for grain-vs-declared-PK mismatch detection in PR review.
 * Returns JSON: `{ "group_by": [...], "dedup_partition": [...] }`.
 */
export declare function extractGrain(sql: string): string

/** Extract metadata (tables, columns, functions) from SQL. */
export declare function extractMetadata(sql: string, dialect?: string | undefined | null): ExtractResult

/** Extract the output column names from a SQL SELECT list. */
export declare function extractOutputColumns(sql: string, dialect?: string | undefined | null): string[]

/**
 * Per-upstream WHERE-filter columns of a model's SQL, for cross-model sibling
 * filter-consistency. Returns JSON `{ "<upstream_table>": ["<filter col>", …] }`.
 */
export declare function extractSourceFilters(sql: string): string

/** Auto-fix SQL errors using fuzzy matching and iterative re-validation. */
export declare function fix(sql: string, schema: Schema, maxIterations?: number | undefined | null): Promise<FixResult>

/** Flush pending telemetry and shut down the background worker. */
export declare function flushSdk(): void

/** Format / pretty-print SQL for a dialect. */
export declare function formatSql(sql: string, dialect?: string | undefined | null): FormatResult

/** Generate test cases for a SQL query (boundary values, NULLs, edge cases). */
export declare function generateTests(sql: string, schema: Schema): TestGenResult

/**
 * Classify the statement type of each SQL statement using full AST parsing.
 *
 * Unlike simple first-keyword detection, this parses a real AST and correctly
 * handles CTEs (`WITH … SELECT` → `SELECT`), set operations (`UNION`,
 * `INTERSECT`, `EXCEPT`), and all DDL / DML / DCL / TCL forms.
 */
export declare function getStatementTypes(sql: string, dialect?: string | undefined | null): StatementTypesResult

/** Import DDL into a Schema. */
export declare function importDdl(ddl: string, dialect?: string | undefined | null): Schema

/** Initialize the SDK with credentials. */
export declare function initSdk(apiKey: string, tenant: string, backendUrl: string, reportFailures: boolean, telemetry?: boolean | undefined | null): void

/** Generate INFORMATION_SCHEMA introspection queries for a database. */
export declare function introspectionSql(dbType: string, database: string, schemaName?: string | undefined | null): IntrospectionSql

/** Quick boolean check: is this SQL safe from injection? */
export declare function isSafe(sql: string): boolean

/** Lint SQL for anti-patterns (SELECT *, missing WHERE, etc.). */
export declare function lint(sql: string, schema: Schema): LintResult

/**
 * Lint `new_sql` and return ONLY findings introduced relative to `base_sql`.
 *
 * Pre-existing findings (present in `base_sql`) are removed via multiset
 * subtraction keyed on `(code, normalised_message)`, so line/column shifts
 * from reformatting do not cause false positives.
 *
 * `schema_context` — optional JSON string of a `SchemaDefinition` (same
 * format accepted by `Schema.fromJson`). Pass `null`/`undefined` to use a
 * dialect-agnostic empty schema.
 *
 * Returns a `LintResult` JSON object — same shape as `lint()`.
 */
export declare function lintDiff(newSql: string, baseSql: string, schemaContext?: string | undefined | null): LintResult

/** Optimize schema for context window (5-level progressive disclosure). */
export declare function optimizeContext(schema: Schema): ContextResult

/** Optimize schema for a specific query (prune to relevant tables/columns). */
export declare function optimizeForQuery(sql: string, schema: Schema): ContextResult

/** Parse a dbt project directory. */
export declare function parseDbtProject(projectDir: string): DbtProject

/** Prune schema to only tables/columns referenced by a SQL query. */
export declare function pruneSchema(sql: string, schema: Schema): SchemaDefinition

/** Reset SDK state. For testing only. */
export declare function resetSdk(): void

/** Resolve a business term to schema elements via fuzzy matching. */
export declare function resolveTerm(term: string, schema: Schema): GlossaryMatch

/**
 * Parse raw LLM output from the AI reviewer into a JSON string of findings.
 *
 * `text` — raw model response (may contain `<think>` blocks, markdown fences, etc.)
 * `valid_files` — the set of file paths that appeared in the diff; findings for any
 *   other path are dropped (the model hallucinated a path).
 *
 * Returns a JSON-serialized `Vec<AiReviewFinding>` — an array of objects, or `"[]"` if
 * nothing could be parsed.  Matches the JSON-string convention used by `DataParitySession`
 * (`start()` / `step()` return strings) and by `exportDdl`.
 */
export declare function reviewAiParse(text: string, validFiles: Array<string>): string

/**
 * Return the AI reviewer system prompt string.
 *
 * The prompt is compiled into the binary from `altimate_core::review::AI_REVIEW_SYSTEM_PROMPT`.
 * Callers can embed this directly in LLM API calls without bundling any TypeScript assets.
 */
export declare function reviewAiSystemPrompt(): string

/**
 * Scan added diff lines for lexical portability issues.
 *
 * `added_lines` — the `+` lines from a SQL diff (without the leading `+`).
 *
 * Returns a JSON-serialized `Vec<LexicalFinding>` — an array of objects, or
 * `"[]"` if no issues are found.  Each element has the shape:
 * `{"code":"LX01"|"LX02","rule":"...","severity":"info","message":"...","line":"..."}`.
 *
 * Results are deduplicated: the same reserved word or operator id across
 * multiple lines appears at most once in the output.
 */
export declare function reviewLexicalScan(addedLines: Array<string>): string

/**
 * AST base-vs-head structural diff — the `*_change` SQL rules (DISTINCT/UNION flip,
 * GROUP BY grain, surrogate-key change, COALESCE removed, predicate removed, type narrowing).
 */
export declare function reviewStructuralDiff(baseSql: string, headSql: string): string

/** Suggest query rewrites and optimizations. */
export declare function rewrite(sql: string, schema: Schema): RewriteResult

/** Scan SQL for injection threats (10 detection rules). */
export declare function scanSql(sql: string): SafetyScanResult

/** Compute a SHA-256 fingerprint of the schema (for caching/change detection). */
export declare function schemaFingerprint(schema: Schema): string

/**
 * Track column-level lineage across multiple queries.
 *
 * The `depth` parameter mirrors `column_lineage`: `"basic"`, `"deep"`, or `"full"` (default).
 * Accepted and validated for API consistency; depth-level filtering for multi-query tracking
 * will be applied in a future update once the core engine exposes it.
 */
export declare function trackLineage(queries: Array<string>, schema: Schema, depth?: string | undefined | null): LineageResult

/** Transpile SQL from one dialect to another. */
export declare function transpile(sql: string, source: string, target: string): TranspileResult

/** Validate SQL against a schema. Returns an object with `valid`, `errors`, `warnings`. */
export declare function validate(sql: string, schema: Schema): Promise<ValidationResult>