import type { IncomingMessage, ServerResponse } from "node:http";
import type { Command } from "commander";

import type { AgentMessage } from "@mariozechner/pi-agent-core";

import type { AuthProfileCredential, OAuthCredential } from "../agents/auth-profiles/types.js";
import type { AnyAgentTool } from "../agents/tools/common.js";
import type { ChannelDock } from "../channels/dock.js";
import type { ChannelPlugin } from "../channels/plugins/types.js";
import type { ClawdbotConfig } from "../config/config.js";
import type { InternalHookHandler } from "../hooks/internal-hooks.js";
import type { HookEntry } from "../hooks/types.js";
import type { ModelProviderConfig } from "../config/types.js";
import type { RuntimeEnv } from "../runtime.js";
import type { WizardPrompter } from "../wizard/prompts.js";
import type { createVpsAwareOAuthHandlers } from "../commands/oauth-flow.js";
import type { GatewayRequestHandler } from "../gateway/server-methods/types.js";
import type { PluginRuntime } from "./runtime/types.js";

export type { PluginRuntime } from "./runtime/types.js";

export type PluginLogger = {
  debug?: (message: string) => void;
  info: (message: string) => void;
  warn: (message: string) => void;
  error: (message: string) => void;
};

export type PluginConfigUiHint = {
  label?: string;
  help?: string;
  advanced?: boolean;
  sensitive?: boolean;
  placeholder?: string;
};

export type PluginKind = "memory";

export type PluginConfigValidation =
  | { ok: true; value?: unknown }
  | { ok: false; errors: string[] };

export type ClawdbotPluginConfigSchema = {
  safeParse?: (value: unknown) => {
    success: boolean;
    data?: unknown;
    error?: {
      issues?: Array<{ path: Array<string | number>; message: string }>;
    };
  };
  parse?: (value: unknown) => unknown;
  validate?: (value: unknown) => PluginConfigValidation;
  uiHints?: Record<string, PluginConfigUiHint>;
  jsonSchema?: Record<string, unknown>;
};

export type ClawdbotPluginToolContext = {
  config?: ClawdbotConfig;
  workspaceDir?: string;
  agentDir?: string;
  agentId?: string;
  sessionKey?: string;
  messageChannel?: string;
  agentAccountId?: string;
  sandboxed?: boolean;
};

export type ClawdbotPluginToolFactory = (
  ctx: ClawdbotPluginToolContext,
) => AnyAgentTool | AnyAgentTool[] | null | undefined;

export type ClawdbotPluginToolOptions = {
  name?: string;
  names?: string[];
  optional?: boolean;
};

export type ClawdbotPluginHookOptions = {
  entry?: HookEntry;
  name?: string;
  description?: string;
  register?: boolean;
};

export type ProviderAuthKind = "oauth" | "api_key" | "token" | "device_code" | "custom";

export type ProviderAuthResult = {
  profiles: Array<{ profileId: string; credential: AuthProfileCredential }>;
  configPatch?: Partial<ClawdbotConfig>;
  defaultModel?: string;
  notes?: string[];
};

export type ProviderAuthContext = {
  config: ClawdbotConfig;
  agentDir?: string;
  workspaceDir?: string;
  prompter: WizardPrompter;
  runtime: RuntimeEnv;
  isRemote: boolean;
  openUrl: (url: string) => Promise<void>;
  oauth: {
    createVpsAwareHandlers: typeof createVpsAwareOAuthHandlers;
  };
};

export type ProviderAuthMethod = {
  id: string;
  label: string;
  hint?: string;
  kind: ProviderAuthKind;
  run: (ctx: ProviderAuthContext) => Promise<ProviderAuthResult>;
};

export type ProviderPlugin = {
  id: string;
  label: string;
  docsPath?: string;
  aliases?: string[];
  envVars?: string[];
  models?: ModelProviderConfig;
  auth: ProviderAuthMethod[];
  formatApiKey?: (cred: AuthProfileCredential) => string;
  refreshOAuth?: (cred: OAuthCredential) => Promise<OAuthCredential>;
};

export type ClawdbotPluginGatewayMethod = {
  method: string;
  handler: GatewayRequestHandler;
};

export type ClawdbotPluginHttpHandler = (
  req: IncomingMessage,
  res: ServerResponse,
) => Promise<boolean> | boolean;

export type ClawdbotPluginCliContext = {
  program: Command;
  config: ClawdbotConfig;
  workspaceDir?: string;
  logger: PluginLogger;
};

export type ClawdbotPluginCliRegistrar = (ctx: ClawdbotPluginCliContext) => void | Promise<void>;

export type ClawdbotPluginServiceContext = {
  config: ClawdbotConfig;
  workspaceDir?: string;
  stateDir: string;
  logger: PluginLogger;
};

export type ClawdbotPluginService = {
  id: string;
  start: (ctx: ClawdbotPluginServiceContext) => void | Promise<void>;
  stop?: (ctx: ClawdbotPluginServiceContext) => void | Promise<void>;
};

export type ClawdbotPluginChannelRegistration = {
  plugin: ChannelPlugin;
  dock?: ChannelDock;
};

export type ClawdbotPluginDefinition = {
  id?: string;
  name?: string;
  description?: string;
  version?: string;
  kind?: PluginKind;
  configSchema?: ClawdbotPluginConfigSchema;
  register?: (api: ClawdbotPluginApi) => void | Promise<void>;
  activate?: (api: ClawdbotPluginApi) => void | Promise<void>;
};

export type ClawdbotPluginModule =
  | ClawdbotPluginDefinition
  | ((api: ClawdbotPluginApi) => void | Promise<void>);

export type ClawdbotPluginApi = {
  id: string;
  name: string;
  version?: string;
  description?: string;
  source: string;
  config: ClawdbotConfig;
  pluginConfig?: Record<string, unknown>;
  runtime: PluginRuntime;
  logger: PluginLogger;
  registerTool: (
    tool: AnyAgentTool | ClawdbotPluginToolFactory,
    opts?: ClawdbotPluginToolOptions,
  ) => void;
  registerHook: (
    events: string | string[],
    handler: InternalHookHandler,
    opts?: ClawdbotPluginHookOptions,
  ) => void;
  registerHttpHandler: (handler: ClawdbotPluginHttpHandler) => void;
  registerChannel: (registration: ClawdbotPluginChannelRegistration | ChannelPlugin) => void;
  registerGatewayMethod: (method: string, handler: GatewayRequestHandler) => void;
  registerCli: (registrar: ClawdbotPluginCliRegistrar, opts?: { commands?: string[] }) => void;
  registerService: (service: ClawdbotPluginService) => void;
  registerProvider: (provider: ProviderPlugin) => void;
  resolvePath: (input: string) => string;
  /** Register a lifecycle hook handler */
  on: <K extends PluginHookName>(
    hookName: K,
    handler: PluginHookHandlerMap[K],
    opts?: { priority?: number },
  ) => void;
};

export type PluginOrigin = "bundled" | "global" | "workspace" | "config";

export type PluginDiagnostic = {
  level: "warn" | "error";
  message: string;
  pluginId?: string;
  source?: string;
};

// ============================================================================
// Plugin Hooks
// ============================================================================

export type PluginHookName =
  | "before_agent_start"
  | "agent_end"
  | "before_compaction"
  | "after_compaction"
  | "message_received"
  | "message_sending"
  | "message_sent"
  | "before_tool_call"
  | "after_tool_call"
  | "tool_result_persist"
  | "session_start"
  | "session_end"
  | "gateway_start"
  | "gateway_stop";

// Agent context shared across agent hooks
export type PluginHookAgentContext = {
  agentId?: string;
  sessionKey?: string;
  workspaceDir?: string;
  messageProvider?: string;
};

// before_agent_start hook
export type PluginHookBeforeAgentStartEvent = {
  prompt: string;
  messages?: unknown[];
};

export type PluginHookBeforeAgentStartResult = {
  systemPrompt?: string;
  prependContext?: string;
};

// agent_end hook
export type PluginHookAgentEndEvent = {
  messages: unknown[];
  success: boolean;
  error?: string;
  durationMs?: number;
};

// Compaction hooks
export type PluginHookBeforeCompactionEvent = {
  messageCount: number;
  tokenCount?: number;
};

export type PluginHookAfterCompactionEvent = {
  messageCount: number;
  tokenCount?: number;
  compactedCount: number;
};

// Message context
export type PluginHookMessageContext = {
  channelId: string;
  accountId?: string;
  conversationId?: string;
};

// message_received hook
export type PluginHookMessageReceivedEvent = {
  from: string;
  content: string;
  timestamp?: number;
  metadata?: Record<string, unknown>;
};

// message_sending hook
export type PluginHookMessageSendingEvent = {
  to: string;
  content: string;
  metadata?: Record<string, unknown>;
};

export type PluginHookMessageSendingResult = {
  content?: string;
  cancel?: boolean;
};

// message_sent hook
export type PluginHookMessageSentEvent = {
  to: string;
  content: string;
  success: boolean;
  error?: string;
};

// Tool context
export type PluginHookToolContext = {
  agentId?: string;
  sessionKey?: string;
  toolName: string;
};

// before_tool_call hook
export type PluginHookBeforeToolCallEvent = {
  toolName: string;
  params: Record<string, unknown>;
};

export type PluginHookBeforeToolCallResult = {
  params?: Record<string, unknown>;
  block?: boolean;
  blockReason?: string;
};

// after_tool_call hook
export type PluginHookAfterToolCallEvent = {
  toolName: string;
  params: Record<string, unknown>;
  result?: unknown;
  error?: string;
  durationMs?: number;
};

// tool_result_persist hook
export type PluginHookToolResultPersistContext = {
  agentId?: string;
  sessionKey?: string;
  toolName?: string;
  toolCallId?: string;
};

export type PluginHookToolResultPersistEvent = {
  toolName?: string;
  toolCallId?: string;
  /**
   * The toolResult message about to be written to the session transcript.
   * Handlers may return a modified message (e.g. drop non-essential fields).
   */
  message: AgentMessage;
  /** True when the tool result was synthesized by a guard/repair step. */
  isSynthetic?: boolean;
};

export type PluginHookToolResultPersistResult = {
  message?: AgentMessage;
};

// Session context
export type PluginHookSessionContext = {
  agentId?: string;
  sessionId: string;
};

// session_start hook
export type PluginHookSessionStartEvent = {
  sessionId: string;
  resumedFrom?: string;
};

// session_end hook
export type PluginHookSessionEndEvent = {
  sessionId: string;
  messageCount: number;
  durationMs?: number;
};

// Gateway context
export type PluginHookGatewayContext = {
  port?: number;
};

// gateway_start hook
export type PluginHookGatewayStartEvent = {
  port: number;
};

// gateway_stop hook
export type PluginHookGatewayStopEvent = {
  reason?: string;
};

// Hook handler types mapped by hook name
export type PluginHookHandlerMap = {
  before_agent_start: (
    event: PluginHookBeforeAgentStartEvent,
    ctx: PluginHookAgentContext,
  ) => Promise<PluginHookBeforeAgentStartResult | void> | PluginHookBeforeAgentStartResult | void;
  agent_end: (event: PluginHookAgentEndEvent, ctx: PluginHookAgentContext) => Promise<void> | void;
  before_compaction: (
    event: PluginHookBeforeCompactionEvent,
    ctx: PluginHookAgentContext,
  ) => Promise<void> | void;
  after_compaction: (
    event: PluginHookAfterCompactionEvent,
    ctx: PluginHookAgentContext,
  ) => Promise<void> | void;
  message_received: (
    event: PluginHookMessageReceivedEvent,
    ctx: PluginHookMessageContext,
  ) => Promise<void> | void;
  message_sending: (
    event: PluginHookMessageSendingEvent,
    ctx: PluginHookMessageContext,
  ) => Promise<PluginHookMessageSendingResult | void> | PluginHookMessageSendingResult | void;
  message_sent: (
    event: PluginHookMessageSentEvent,
    ctx: PluginHookMessageContext,
  ) => Promise<void> | void;
  before_tool_call: (
    event: PluginHookBeforeToolCallEvent,
    ctx: PluginHookToolContext,
  ) => Promise<PluginHookBeforeToolCallResult | void> | PluginHookBeforeToolCallResult | void;
  after_tool_call: (
    event: PluginHookAfterToolCallEvent,
    ctx: PluginHookToolContext,
  ) => Promise<void> | void;
  tool_result_persist: (
    event: PluginHookToolResultPersistEvent,
    ctx: PluginHookToolResultPersistContext,
  ) => PluginHookToolResultPersistResult | void;
  session_start: (
    event: PluginHookSessionStartEvent,
    ctx: PluginHookSessionContext,
  ) => Promise<void> | void;
  session_end: (
    event: PluginHookSessionEndEvent,
    ctx: PluginHookSessionContext,
  ) => Promise<void> | void;
  gateway_start: (
    event: PluginHookGatewayStartEvent,
    ctx: PluginHookGatewayContext,
  ) => Promise<void> | void;
  gateway_stop: (
    event: PluginHookGatewayStopEvent,
    ctx: PluginHookGatewayContext,
  ) => Promise<void> | void;
};

export type PluginHookRegistration<K extends PluginHookName = PluginHookName> = {
  pluginId: string;
  hookName: K;
  handler: PluginHookHandlerMap[K];
  priority?: number;
  source: string;
};