// src/types.ts

// ============================================================
// Error Type Hierarchy
// ============================================================

export enum ErrorType {
  NETWORK_ERROR = 'network_error',
  API_ERROR = 'api_error',
  VALIDATION_ERROR = 'validation_error',
  STREAMING_ERROR = 'streaming_error',
  TOOL_EXECUTION_ERROR = 'tool_execution_error',
  PATH_VALIDATION_ERROR = 'path_validation_error',
  UNKNOWN_ERROR = 'unknown_error',
}

export class OllamaError extends Error {
  public readonly type: ErrorType;

  constructor(message: string, type: ErrorType) {
    super(message);
    this.type = type;
    Object.setPrototypeOf(this, OllamaError.prototype);
  }
}

export class NetworkError extends OllamaError {
  public readonly statusCode?: number;

  constructor(message: string, statusCode?: number) {
    super(message, ErrorType.NETWORK_ERROR);
    this.statusCode = statusCode;
    Object.setPrototypeOf(this, NetworkError.prototype);
  }
}

export class ApiError extends OllamaError {
  public readonly statusCode?: number;

  constructor(message: string, statusCode?: number) {
    super(message, ErrorType.API_ERROR);
    this.statusCode = statusCode;
    Object.setPrototypeOf(this, ApiError.prototype);
  }
}

export interface ValidationFieldDetails {
  field?: string;
  message?: string;
}

export class ValidationError extends OllamaError {
  public readonly details?: ValidationFieldDetails;

  constructor(message: string, details?: ValidationFieldDetails) {
    super(message, ErrorType.VALIDATION_ERROR);
    this.details = details;
    Object.setPrototypeOf(this, ValidationError.prototype);
  }
}

export class StreamingError extends OllamaError {
  constructor(message: string) {
    super(message, ErrorType.STREAMING_ERROR);
    Object.setPrototypeOf(this, StreamingError.prototype);
  }
}

export class ToolExecutionError extends OllamaError {
  public readonly toolName: string;

  constructor(message: string, toolName: string) {
    super(message, ErrorType.TOOL_EXECUTION_ERROR);
    this.toolName = toolName;
    Object.setPrototypeOf(this, ToolExecutionError.prototype);
  }
}

export class PathValidationError extends OllamaError {
  public readonly path: string;

  constructor(message: string, path: string) {
    super(message, ErrorType.PATH_VALIDATION_ERROR);
    this.path = path;
    Object.setPrototypeOf(this, PathValidationError.prototype);
  }
}

// ============================================================
// Plugin Configuration
// ============================================================

export interface CacheConfig {
  enabled: boolean;
  similarityThreshold: number;
  collectionName: string;
  embeddingModel: string;
}

export interface PluginSettings {
  ollamaUrl: string;
  model: string;
  vaultSearchLimit: number;
  maxMessageHistory: number;
  lastIndexTime: number;
  cacheConfig: CacheConfig;
}

// ============================================================
// Ollama Protocol Types
// ============================================================

export interface OllamaTool {
  type: 'function';
  function: {
    name: string;
    description: string;
    parameters: {
      type: 'object';
      properties: Record<string, unknown>;
      required: string[];
    };
  };
}

export interface OllamaToolCall {
  id: string;
  type: 'function';
  function: {
    name: string;
    arguments: string | Record<string, unknown>;
  };
}

export interface OllamaMessage {
  role: 'system' | 'user' | 'assistant' | 'tool';
  content: string;
  tool_calls?: OllamaToolCall[];
}

// ============================================================
// Tool Execution Types
// ============================================================

export interface ToolCall {
  id: string;
  type: 'function';
  function: {
    name: string;
    arguments: string | Record<string, unknown>;
  };
}

export interface ToolResult {
  success: boolean;
  message: string;
}

export interface ExecutionResult {
  success: boolean;
  output: string;
}

// ============================================================
// Chat Message Types
// ============================================================

export interface ChatMessage {
  id: string;
  role: 'user' | 'assistant';
  content: string;
  timestamp: number;
  isStreaming?: boolean;
  tool_calls?: ToolCall[];
}

// ============================================================
// Vault Index Types
// ============================================================

export interface VaultIndexEntry {
  path: string;
  title: string;
  content: string;
  score: number;
}