const VERSION = "0.5.0"

type ContainerInfo struct {
	ContainerReference

	// The direct subcontainers of the current container.
	Subcontainers []ContainerReference `json:"subcontainers,omitempty"`

	// The isolation used in the container.
	Spec ContainerSpec `json:"spec,omitempty"`

	// Historical statistics gathered from the container.
	Stats []*ContainerStats `json:"stats,omitempty"`
}

type ContainerInfoRequest struct {
	// Max number of stats to return.
	NumStats int `json:"num_stats,omitempty"`
}

type ContainerReference struct {
	// The absolute name of the container.
	Name string `json:"name"`

	Aliases []string `json:"aliases,omitempty"`
}

type ContainerSpec struct {
	HasCpu bool    `json:"has_cpu"`
	Cpu    CpuSpec `json:"cpu,omitempty"`

	HasMemory bool       `json:"has_memory"`
	Memory    MemorySpec `json:"memory,omitempty"`

	HasNetwork bool `json:"has_network"`

	HasFilesystem bool `json:"has_filesystem"`
}

type ContainerStats struct {
	// The time of this stat point.
	Timestamp time.Time     `json:"timestamp"`
	Cpu       *CpuStats     `json:"cpu,omitempty"`
	DiskIo    DiskIoStats   `json:"diskio,omitempty"`
	Memory    *MemoryStats  `json:"memory,omitempty"`
	Network   *NetworkStats `json:"network,omitempty"`
	// Filesystem statistics
	Filesystem []FsStats `json:"filesystem,omitempty"`
}

type CpuSpec struct {
	Limit    uint64 `json:"limit"`
	MaxLimit uint64 `json:"max_limit"`
	Mask     string `json:"mask,omitempty"`
}

type CpuStats struct {
	Usage struct {
		// Total CPU usage.
		// Units: nanoseconds
		Total uint64 `json:"total"`

		// Per CPU/core usage of the container.
		// Unit: nanoseconds.
		PerCpu []uint64 `json:"per_cpu_usage,omitempty"`

		// Time spent in user space.
		// Unit: nanoseconds
		User uint64 `json:"user"`

		// Time spent in kernel space.
		// Unit: nanoseconds
		System uint64 `json:"system"`
	} `json:"usage"`
	Load int32 `json:"load"`
}

type DiskIoStats struct {
	IoServiceBytes []PerDiskStats `json:"io_service_bytes,omitempty"`
	IoServiced     []PerDiskStats `json:"io_serviced,omitempty"`
	IoQueued       []PerDiskStats `json:"io_queued,omitempty"`
	Sectors        []PerDiskStats `json:"sectors,omitempty"`
}

type FsInfo struct {
	// Block device associated with the filesystem.
	Device string `json:"device"`

	// Total number of bytes available on the filesystem.
	Capacity uint64 `json:"capacity"`
}

type FsStats struct {
	// The block device name associated with the filesystem.
	Device string `json:"device,omitempty"`

	// Number of bytes that can be consumed by the container on this filesystem.
	Limit uint64 `json:"capacity"`

	// Number of bytes that is consumed by the container on this filesystem.
	Usage uint64 `json:"usage"`
}

type Interference struct {
	// Absolute name of the antagonist container name. This field
	// should not be empty.
	Antagonist string `json:"antagonist"`

	// The absolute path of the victims. This field should not be empty.
	Victims []string `json:"victims"`

	// The name of the detector used to detect this antagonism. This field
	// should not be empty
	Detector string `json:"detector"`

	// Human readable description of this interference
	Description string `json:"description,omitempty"`
}

type MachineInfo struct {
	// The number of cores in this machine.
	NumCores int `json:"num_cores"`

	// The amount of memory (in bytes) in this machine
	MemoryCapacity int64 `json:"memory_capacity"`

	// Filesystems on this machine.
	Filesystems []FsInfo `json:"filesystems"`
}

type MachineInfoFactory interface {
	GetMachineInfo() (*MachineInfo, error)
	GetVersionInfo() (*VersionInfo, error)
}

type MemorySpec struct {
	// The amount of memory requested. Default is unlimited (-1).
	// Units: bytes.
	Limit uint64 `json:"limit,omitempty"`

	// The amount of guaranteed memory.  Default is 0.
	// Units: bytes.
	Reservation uint64 `json:"reservation,omitempty"`

	// The amount of swap space requested. Default is unlimited (-1).
	// Units: bytes.
	SwapLimit uint64 `json:"swap_limit,omitempty"`
}

type MemoryStats struct {
	// Memory limit, equivalent to "limit" in MemorySpec.
	// Units: Bytes.
	Limit uint64 `json:"limit,omitempty"`

	// Current memory usage, this includes all memory regardless of when it was
	// accessed.
	// Units: Bytes.
	Usage uint64 `json:"usage,omitempty"`

	// The amount of working set memory, this includes recently accessed memory,
	// dirty memory, and kernel memory. Working set is <= "usage".
	// Units: Bytes.
	WorkingSet uint64 `json:"working_set,omitempty"`

	ContainerData    MemoryStatsMemoryData `json:"container_data,omitempty"`
	HierarchicalData MemoryStatsMemoryData `json:"hierarchical_data,omitempty"`
}

type MemoryStatsMemoryData struct {
	Pgfault    uint64 `json:"pgfault,omitempty"`
	Pgmajfault uint64 `json:"pgmajfault,omitempty"`
}

type NetworkStats struct {
	// Cumulative count of bytes received.
	RxBytes uint64 `json:"rx_bytes"`
	// Cumulative count of packets received.
	RxPackets uint64 `json:"rx_packets"`
	// Cumulative count of receive errors encountered.
	RxErrors uint64 `json:"rx_errors"`
	// Cumulative count of packets dropped while receiving.
	RxDropped uint64 `json:"rx_dropped"`
	// Cumulative count of bytes transmitted.
	TxBytes uint64 `json:"tx_bytes"`
	// Cumulative count of packets transmitted.
	TxPackets uint64 `json:"tx_packets"`
	// Cumulative count of transmit errors encountered.
	TxErrors uint64 `json:"tx_errors"`
	// Cumulative count of packets dropped while transmitting.
	TxDropped uint64 `json:"tx_dropped"`
}

type PerDiskStats struct {
	Major uint64            `json:"major"`
	Minor uint64            `json:"minor"`
	Stats map[string]uint64 `json:"stats"`
}

type VersionInfo struct {
	// Kernel version.
	KernelVersion string `json:"kernel_version"`

	// OS image being used for cadvisor container, or host image if running on host directly.
	ContainerOsVersion string `json:"container_os_version"`

	// Docker version.
	DockerVersion string `json:"docker_version"`

	// cAdvisor version.
	CadvisorVersion string `json:"cadvisor_version"`
}