# -*- coding: utf-8 -*-
#
# Copyright (C) 2020 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from pydantic import BaseModel, Field
from pathlib import Path
from typing import Optional, List
from enum import Enum
from uuid import UUID

from .nodes import CustomAdapter, NodeStatus


class QemuPlatform(str, Enum):

    aarch64 = "aarch64"
    alpha = "alpha"
    arm = "arm"
    cris = "cris"
    i386 = "i386"
    lm32 = "lm32"
    m68k = "m68k"
    microblaze = "microblaze"
    microblazeel = "microblazeel"
    mips = "mips"
    mips64 = "mips64"
    mips64el = "mips64el"
    mipsel = "mipsel"
    moxie = "moxie"
    or32 = "or32"
    ppc = "ppc"
    ppc64 = "ppc64"
    ppcemb = "ppcemb"
    s390x = "s390x"
    sh4 = "sh4"
    sh4eb = "sh4eb"
    sparc =  "sparc"
    sparc64 = "sparc64"
    tricore = "tricore"
    unicore32 = "unicore32"
    x86_64 = "x86_64"
    xtensa = "xtensa"
    xtensaeb = "xtensaeb"


class QemuConsoleType(str, Enum):
    """
    Supported console types.
    """

    vnc = "vnc"
    telnet = "telnet"
    spice = "spice"
    spice_agent = "spice+agent"
    none = "none"


class QemuBootPriority(str, Enum):
    """
    Supported boot priority types.
    """

    c = "c"
    d = "d"
    n = "n"
    cn = "cn"
    cd = "cd"
    dn = "dn"
    dc = "dc"
    nc = "nc"
    nd = "nd"


class QemuOnCloseAction(str, Enum):
    """
    Supported actions when closing Qemu VM.
    """

    power_off = "power_off"
    shutdown_signal = "shutdown_signal"
    save_vm_state = "save_vm_state"


class QemuProcessPriority(str, Enum):

    realtime = "realtime"
    very_high = "very high"
    high = "high"
    normal = "normal"
    low = "low"
    very_low = "very low"


class QemuBase(BaseModel):
    """
    Common Qemu node properties.
    """

    name: str
    node_id: Optional[UUID]
    usage: Optional[str] = Field(None, description="How to use the node")
    linked_clone: Optional[bool] = Field(None, description="Whether the VM is a linked clone or not")
    qemu_path: Optional[Path] = Field(None, description="Qemu executable path")
    platform: Optional[QemuPlatform] = Field(None, description="Platform to emulate")
    console: Optional[int] = Field(None, gt=0, le=65535, description="Console TCP port")
    console_type: Optional[QemuConsoleType] = Field(None, description="Console type")
    aux: Optional[int] = Field(None, gt=0, le=65535, description="Auxiliary console TCP port")
    aux_type: Optional[QemuConsoleType] = Field(None, description="Auxiliary console type")
    hda_disk_image: Optional[Path] = Field(None, description="QEMU hda disk image path")
    hda_disk_image_md5sum: Optional[str] = Field(None, description="QEMU hda disk image checksum")
    hda_disk_image_interface: Optional[str] = Field(None, description="QEMU hda interface")
    hdb_disk_image: Optional[Path] = Field(None, description="QEMU hdb disk image path")
    hdb_disk_image_md5sum: Optional[str] = Field(None, description="QEMU hdb disk image checksum")
    hdb_disk_image_interface: Optional[str] = Field(None, description="QEMU hdb interface")
    hdc_disk_image: Optional[Path] = Field(None, description="QEMU hdc disk image path")
    hdc_disk_image_md5sum: Optional[str] = Field(None, description="QEMU hdc disk image checksum")
    hdc_disk_image_interface: Optional[str] = Field(None, description="QEMU hdc interface")
    hdd_disk_image: Optional[Path] = Field(None, description="QEMU hdd disk image path")
    hdd_disk_image_md5sum: Optional[str] = Field(None, description="QEMU hdd disk image checksum")
    hdd_disk_image_interface: Optional[str] = Field(None, description="QEMU hdd interface")
    cdrom_image: Optional[Path] = Field(None, description="QEMU cdrom image path")
    cdrom_image_md5sum: Optional[str] = Field(None, description="QEMU cdrom image checksum")
    bios_image: Optional[Path] = Field(None, description="QEMU bios image path")
    bios_image_md5sum: Optional[str] = Field(None, description="QEMU bios image checksum")
    initrd: Optional[Path] = Field(None, description="QEMU initrd path")
    initrd_md5sum: Optional[str] = Field(None, description="QEMU initrd checksum")
    kernel_image: Optional[Path] = Field(None, description="QEMU kernel image path")
    kernel_image_md5sum: Optional[str] = Field(None, description="QEMU kernel image checksum")
    kernel_command_line: Optional[str] = Field(None, description="QEMU kernel command line")
    boot_priotiry: Optional[QemuBootPriority] = Field(None, description="QEMU boot priority")
    ram: Optional[int] = Field(None, description="Amount of RAM in MB")
    cpus: Optional[int] = Field(None, ge=1, le=255, description="Number of vCPUs")
    maxcpus: Optional[int] = Field(None, ge=1, le=255, description="Maximum number of hotpluggable vCPUs")
    adapters: Optional[int] = Field(None, ge=0, le=275, description="Number of adapters")
    adapter_type: Optional[str] = Field(None, description="QEMU adapter type")
    mac_address: Optional[str] = Field(None, description="QEMU MAC address", regex="^([0-9a-fA-F]{2}[:]){5}([0-9a-fA-F]{2})$")
    legacy_networking: Optional[bool] = Field(None, description="Use QEMU legagy networking commands (-net syntax)")
    replicate_network_connection_state: Optional[bool] = Field(None, description="Replicate the network connection state for links in Qemu")
    create_config_disk: Optional[bool] = Field(None, description="Automatically create a config disk on HDD disk interface (secondary slave)")
    on_close: Optional[QemuOnCloseAction] = Field(None, description="Action to execute on the VM is closed")
    cpu_throttling: Optional[int] = Field(None, ge=0, le=800, description="Percentage of CPU allowed for QEMU")
    process_priority: Optional[QemuProcessPriority] = Field(None, description="Process priority for QEMU")
    options: Optional[str] = Field(None, description="Additional QEMU options")
    custom_adapters: Optional[List[CustomAdapter]] = Field(None, description="Custom adapters")


class QemuCreate(QemuBase):
    """
    Properties to create a Qemu node.
    """

    pass


class QemuUpdate(QemuBase):
    """
    Properties to update a Qemu node.
    """

    name: Optional[str]


class Qemu(QemuBase):

    project_id: UUID = Field(..., description="Project ID")
    node_directory: str = Field(..., description="Path to the node working directory (read only)")
    command_line: str = Field(..., description="Last command line used to start IOU (read only)")
    status: NodeStatus = Field(..., description="Container status (read only)")


class QemuDriveName(str, Enum):
    """
    Supported Qemu drive names.
    """

    hda = "hda"
    hdb = "hdb"
    hdc = "hdc"
    hdd = "hdd"


class QemuDiskResize(BaseModel):
    """
    Properties to resize a Qemu disk.
    """

    drive_name: QemuDriveName = Field(..., description="Qemu drive name")
    extend: int = Field(..., description="Number of Megabytes to extend the image")


class QemuBinaryPath(BaseModel):

    path: Path
    version: str


class QemuImageFormat(str, Enum):
    """
    Supported Qemu image formats.
    """

    qcow2 = "qcow2"
    qcow = "qcow"
    vpc = "vpc"
    vdi = "vdi"
    vdmk = "vdmk"
    raw = "raw"


class QemuImagePreallocation(str, Enum):
    """
    Supported Qemu image preallocation options.
    """

    off = "off"
    metadata = "metadata"
    falloc = "falloc"
    full = "full"


class QemuImageOnOff(str, Enum):
    """
    Supported Qemu image on/off options.
    """

    on = "off"
    off = "off"


class QemuImageSubformat(str, Enum):
    """
    Supported Qemu image preallocation options.
    """

    dynamic = "dynamic"
    fixed = "fixed"
    stream_optimized = "streamOptimized"
    two_gb_max_extent_sparse = "twoGbMaxExtentSparse"
    two_gb_max_extent_flat = "twoGbMaxExtentFlat"
    monolithic_sparse = "monolithicSparse"
    monolithic_flat = "monolithicFlat"


class QemuImageAdapterType(str, Enum):
    """
    Supported Qemu image on/off options.
    """

    ide = "ide"
    lsilogic = "lsilogic"
    buslogic = "buslogic"
    legacy_esx = "legacyESX"


class QemuImageBase(BaseModel):

    qemu_img: Path = Field(..., description="Path to the qemu-img binary")
    path: Path = Field(..., description="Absolute or relative path of the image")
    format: QemuImageFormat = Field(..., description="Image format type")
    size: int = Field(..., description="Image size in Megabytes")
    preallocation: Optional[QemuImagePreallocation]
    cluster_size: Optional[int]
    refcount_bits: Optional[int]
    lazy_refcounts: Optional[QemuImageOnOff]
    subformat: Optional[QemuImageSubformat]
    static: Optional[QemuImageOnOff]
    zeroed_grain: Optional[QemuImageOnOff]
    adapter_type: Optional[QemuImageAdapterType]


class QemuImageCreate(QemuImageBase):

    pass


class QemuImageUpdate(QemuImageBase):

    format: Optional[QemuImageFormat] = Field(None, description="Image format type")
    size: Optional[int] = Field(None, description="Image size in Megabytes")
    extend: Optional[int] = Field(None, description="Number of Megabytes to extend the image")