package rados

// #cgo LDFLAGS: -lrados
// #include <stdlib.h>
// #include <rados/librados.h>
import "C"

import "unsafe"

type Conn struct {
    cluster C.rados_t
}

func (c *Conn) PingMonitor(id string) (string, error) {
    c_id := C.CString(id)
    defer C.free(unsafe.Pointer(c_id))

    var strlen C.size_t
    var strout *C.char

    ret := C.rados_ping_monitor(c.cluster, c_id, &strout, &strlen)
    defer C.rados_buffer_free(strout)

    if ret == 0 {
        reply := C.GoStringN(strout, (C.int)(strlen))
        return reply, nil
    } else {
        return "", RadosError(int(ret))
    }
}

func (c *Conn) Connect() error {
    ret := C.rados_connect(c.cluster)
    if ret == 0 {
        return nil
    } else {
        return RadosError(int(ret))
    }
}

func (c *Conn) Shutdown() {
    C.rados_shutdown(c.cluster)
}

func (c *Conn) ReadConfigFile(path string) error {
    c_path := C.CString(path)
    defer C.free(unsafe.Pointer(c_path))
    ret := C.rados_conf_read_file(c.cluster, c_path)
    if ret == 0 {
        return nil
    } else {
        return RadosError(int(ret))
    }
}

func (c *Conn) ReadDefaultConfigFile() error {
    ret := C.rados_conf_read_file(c.cluster, nil)
    if ret == 0 {
        return nil
    } else {
        return RadosError(int(ret))
    }
}

func (c *Conn) OpenPool(pool string) (*Pool, error) {
    c_pool := C.CString(pool)
    defer C.free(unsafe.Pointer(c_pool))
    ioctx := &Pool{}
    ret := C.rados_ioctx_create(c.cluster, c_pool, &ioctx.ioctx)
    if ret == 0 {
        return ioctx, nil
    } else {
        return nil, RadosError(int(ret))
    }
}