// Package cloudinit implements a lightweight cloud-init parser for KubeSolo OS.
//
// It reads a simplified cloud-init YAML config and applies:
//   - hostname
//   - network configuration (static IP or DHCP)
//   - KubeSolo extra flags and settings
//   - NTP servers
//
// The config file is typically at /mnt/data/etc-kubesolo/cloud-init.yaml
// or specified via kubesolo.cloudinit= boot parameter.
package cloudinit

// Config is the top-level cloud-init configuration.
type Config struct {
	Hostname  string          `yaml:"hostname"`
	Network   NetworkConfig   `yaml:"network"`
	KubeSolo  KubeSoloConfig  `yaml:"kubesolo"`
	NTP       NTPConfig       `yaml:"ntp"`
	Airgap    AirgapConfig    `yaml:"airgap"`
	Portainer PortainerConfig `yaml:"portainer"`
	Updates   UpdatesConfig   `yaml:"updates"`
}

// UpdatesConfig configures the kubesolo-update agent. Written to
// /etc/kubesolo/update.conf on first boot. See update/pkg/config.
type UpdatesConfig struct {
	// Server is the update server URL (HTTP or OCI registry).
	Server string `yaml:"server"`
	// Channel selects which channel to track ("stable", "beta", "edge").
	// Empty = "stable".
	Channel string `yaml:"channel"`
	// MaintenanceWindow restricts apply to the given local time range,
	// e.g. "03:00-05:00". Wrapping windows like "23:00-01:00" supported.
	// Empty = no restriction.
	MaintenanceWindow string `yaml:"maintenance_window"`
	// PubKey is the path to the Ed25519 public key file used to verify
	// signed update artifacts. Empty = signature verification disabled.
	PubKey string `yaml:"pubkey"`
}

// NetworkConfig defines network settings.
type NetworkConfig struct {
	Mode      string   `yaml:"mode"`      // "dhcp" or "static"
	Interface string   `yaml:"interface"` // e.g. "eth0" (auto-detected if empty)
	Address   string   `yaml:"address"`   // CIDR notation, e.g. "192.168.1.100/24"
	Gateway   string   `yaml:"gateway"`   // e.g. "192.168.1.1"
	DNS       []string `yaml:"dns"`       // nameservers
}

// KubeSoloConfig defines KubeSolo-specific settings.
type KubeSoloConfig struct {
	ExtraFlags             string   `yaml:"extra-flags"`
	LocalStorage           *bool    `yaml:"local-storage"`
	LocalStorageSharedPath string   `yaml:"local-storage-shared-path"`
	ExtraSANs              []string `yaml:"apiserver-extra-sans"`
	Debug                  bool     `yaml:"debug"`
	PprofServer            bool     `yaml:"pprof-server"`
	PortainerEdgeID        string   `yaml:"portainer-edge-id"`
	PortainerEdgeKey       string   `yaml:"portainer-edge-key"`
	PortainerEdgeAsync     bool     `yaml:"portainer-edge-async"`
	// v1.1.4+: skip edge-optimised overrides, use upstream k8s defaults
	// (useful for CI and powerful machines, disabled by default).
	Full bool `yaml:"full"`
	// v1.1.5+: disable IPv6 in the cluster.
	DisableIPv6 bool `yaml:"disable-ipv6"`
	// v1.1.5+: detect SQLite WAL corruption on startup and recover from
	// unclean shutdowns (e.g. power loss). Recommended ON for edge devices.
	DBWALRepair bool `yaml:"db-wal-repair"`
}

// NTPConfig defines NTP settings.
type NTPConfig struct {
	Servers []string `yaml:"servers"`
}

// AirgapConfig defines air-gapped deployment settings.
type AirgapConfig struct {
	ImportImages bool   `yaml:"import-images"`
	ImagesDir    string `yaml:"images-dir"`
}

// PortainerConfig defines Portainer Edge Agent settings.
type PortainerConfig struct {
	EdgeAgent EdgeAgentConfig `yaml:"edge-agent"`
}

// EdgeAgentConfig holds Portainer Edge Agent connection details.
type EdgeAgentConfig struct {
	Enabled     bool   `yaml:"enabled"`
	EdgeID      string `yaml:"edge-id"`
	EdgeKey     string `yaml:"edge-key"`
	PortainerURL string `yaml:"portainer-url"`
	Image       string `yaml:"image"`
}