edition

type ContentBlock struct {
	Type string
	Text string
}

type Hooks struct {
	// --- identity ---
	Name         string // "open" (default) / overlay identifier
	ScenarioCode string // injected into x-dingtalk-scenario-code header

	// --- runtime mode ---
	IsEmbedded     bool // true when running inside a host application
	HideAuthLogin  bool // true suppresses the "dws auth login" command
	AutoPurgeToken bool // true deletes local token data on expiry

	// --- paths ---
	ConfigDir func() string // custom config directory; nil → ~/.dws

	// --- HTTP headers ---
	MergeHeaders func(base map[string]string) map[string]string

	// --- auth ---
	AuthClientID      string // OAuth client ID for device-flow authorisation
	AuthClientFromMCP bool   // true → fetch client ID from MCP at runtime
	OnAuthError       func(configDir string, err error) error
	TokenProvider     func(ctx context.Context, fallback func() (string, error)) (string, error)

	// --- token persistence (overlay-managed keychain / encrypted storage) ---
	SaveToken   func(configDir string, data []byte) error // persist token blob
	LoadToken   func(configDir string) ([]byte, error)    // retrieve token blob
	DeleteToken func(configDir string) error              // remove persisted token

	// --- MCP result classification ---
	// ClassifyToolResult inspects raw MCP tool-call content and returns a typed
	// error (e.g. PATError, CLIError) when the response contains a known
	// gateway-auth or PAT-permission failure. nil → no special handling.
	ClassifyToolResult func(content map[string]any) error

	// --- product & endpoint ---
	StaticServers         func() []ServerInfo                          // non-nil → skip Market discovery
	VisibleProducts       func() []string                              // non-nil → override help visibility
	RegisterExtraCommands func(root *cobra.Command, caller ToolCaller) // register overlay-only commands

	// AfterPersistentPreRun runs at the end of the root PersistentPreRunE after
	// global setup (OAuth flag overrides, log level, output sink). Overlays use
	// this for clients that bypass the MCP runner (e.g. A2A gateway).
	AfterPersistentPreRun func(cmd *cobra.Command, args []string) error
}

type ServerInfo struct {
	ID       string
	Name     string
	Endpoint string
	Prefixes []string
}

type ToolCaller interface {
	// CallTool invokes an MCP tool by product ID and tool name.
	CallTool(ctx context.Context, productID, toolName string, args map[string]any) (*ToolResult, error)
	// Format returns the current output format ("json", "table", "raw").
	Format() string
	// DryRun returns true when --dry-run is active.
	DryRun() bool
}

type ToolResult struct {
	Content []ContentBlock
}