package commands

import (
	"context"

	"github.com/sipeed/picoclaw/pkg/config"
)

type MCPServerInfo struct {
	Name      string
	Enabled   bool
	Deferred  bool
	Connected bool
	ToolCount int
}

type MCPToolParameterInfo struct {
	Name        string
	Type        string
	Description string
	Required    bool
}

type MCPToolInfo struct {
	Name        string
	Description string
	Parameters  []MCPToolParameterInfo
}

// ContextStats describes current session context window usage.
type ContextStats struct {
	UsedTokens       int
	TotalTokens      int // model context window
	CompressAtTokens int // compression threshold
	UsedPercent      int // 0-100
	MessageCount     int
}

// Runtime provides runtime dependencies to command handlers. It is constructed
// per-request by the agent loop so that per-request state (like session scope)
// can coexist with long-lived callbacks (like GetModelInfo).
type Runtime struct {
	Config             *config.Config
	GetModelInfo       func() (name, provider string)
	AskSideQuestion    func(ctx context.Context, question string) (string, error)
	ListAgentIDs       func() []string
	ListDefinitions    func() []Definition
	ListSkillNames     func() []string
	ListMCPServers     func(ctx context.Context) []MCPServerInfo
	ListMCPTools       func(ctx context.Context, serverName string) ([]MCPToolInfo, error)
	GetEnabledChannels func() []string
	GetActiveTurn      func() any // Returning any to avoid circular dependency with agent package
	GetContextStats    func() *ContextStats
	SwitchModel        func(value string) (oldModel string, err error)
	SwitchChannel      func(value string) error
	ClearHistory       func() error
	ReloadConfig       func() error
}