package aitools

// ToolSpec 工具元数据：MCP stdio 与侧栏 Agent（OpenAI tools）共用同一份契约。 // Logan.Li
type ToolSpec struct {
	Name        string
	Description string
	Properties  map[string]any
	Required    []string
}

// ToolSpecs P0 七工具 schema（顺序与 ToolNames 一致）。
func ToolSpecs() []ToolSpec {
	connID := map[string]any{"type": "string", "description": "Saved connection id from opsxdb_list_connections"}
	database := map[string]any{"type": "string", "description": "Database / schema / Redis DB index"}
	return []ToolSpec{
		{
			Name:        ToolListConnections,
			Description: "List whitelisted OpsxDB connections (id/name/driver/host/port/database; never passwords).",
			Properties:  map[string]any{},
		},
		{
			Name:        ToolListDatabases,
			Description: "List databases for a connection.",
			Properties:  map[string]any{"connection_id": connID},
			Required:    []string{"connection_id"},
		},
		{
			Name:        ToolListTables,
			Description: "List tables/views (or engine equivalents) in a database.",
			Properties:  map[string]any{"connection_id": connID, "database": database},
			Required:    []string{"connection_id"},
		},
		{
			Name:        ToolDescribeTable,
			Description: "Describe columns and metadata for a table.",
			Properties: map[string]any{
				"connection_id": connID,
				"database":      database,
				"table":         map[string]any{"type": "string", "description": "Table name"},
			},
			Required: []string{"connection_id", "table"},
		},
		{
			Name:        ToolGetSchemaContext,
			Description: "Compact schema text for LLM context (capped ~4k chars).",
			Properties: map[string]any{
				"connection_id": connID,
				"database":      database,
				"max_tables":    map[string]any{"type": "integer", "description": "Max tables to include (default 40)"},
			},
			Required: []string{"connection_id"},
		},
		{
			Name:        ToolExecuteQuery,
			Description: "Execute SQL. Default read-only (SELECT/SHOW/EXPLAIN/WITH…SELECT). Writes require mcp.json mode=read_write AND confirm_danger=true (never auto). Default limit 100, max 500.",
			Properties: map[string]any{
				"connection_id":   connID,
				"sql":             map[string]any{"type": "string", "description": "SQL statement"},
				"database":        database,
				"limit":           map[string]any{"type": "integer", "description": "Row limit (default 100, max 500)"},
				"confirm_danger":  map[string]any{"type": "boolean", "description": "Required for writes when mode=read_write; Agent UI sets this only after user confirms"},
			},
			Required: []string{"connection_id", "sql"},
		},
		{
			Name:        ToolExecuteRedisCommand,
			Description: "Execute Redis command. Default read-only whitelist. Writes require mode=read_write AND confirm_danger=true. FLUSH*/KEYS/CONFIG always denied.",
			Properties: map[string]any{
				"connection_id":  connID,
				"command":        map[string]any{"type": "string", "description": "Single Redis command line"},
				"database":       database,
				"confirm_danger": map[string]any{"type": "boolean", "description": "Required for writes when mode=read_write"},
			},
			Required: []string{"connection_id", "command"},
		},
	}
}

// InputSchema 返回 JSON Schema object（MCP raw schema / OpenAI parameters）。
func (t ToolSpec) InputSchema() map[string]any {
	schema := map[string]any{
		"type":       "object",
		"properties": t.Properties,
	}
	if len(t.Required) > 0 {
		schema["required"] = t.Required
	}
	if t.Properties == nil {
		schema["properties"] = map[string]any{}
	}
	return schema
}

// OpenAITool OpenAI chat.completions tools[] 一项。
type OpenAITool struct {
	Type     string `json:"type"`
	Function struct {
		Name        string         `json:"name"`
		Description string         `json:"description"`
		Parameters  map[string]any `json:"parameters"`
	} `json:"function"`
}

// OpenAITools 供 Agent / DeepSeek 等 openai-chat 兼容协议挂载。
func OpenAITools() []OpenAITool {
	specs := ToolSpecs()
	out := make([]OpenAITool, 0, len(specs))
	for _, s := range specs {
		var t OpenAITool
		t.Type = "function"
		t.Function.Name = s.Name
		t.Function.Description = s.Description
		t.Function.Parameters = s.InputSchema()
		out = append(out, t)
	}
	return out
}