package bwtest

import (
	"time"
)

// ServerConfig defines the Bandwidth Test server configuration
type ServerConfig struct {
	Enabled        bool   `json:"enabled"`
	Port           int    `json:"port"`
	ListenAddr     string `json:"listen_addr"`
	AllowAnonymous bool   `json:"allow_anonymous"`
}

// SessionRequest defines parameters sent by the client to initiate a test
type SessionRequest struct {
	Target         string `json:"target"`          // Target IP or hostname
	Port           int    `json:"port"`            // Target control port (default 2000)
	Protocol       string `json:"protocol"`        // "udp" or "tcp"
	Direction      string `json:"direction"`       // "tx", "rx", "both"
	BandwidthLimit int64  `json:"bandwidth_limit"` // Target bits/sec (0 = unlimited line-rate)
	PacketSize     int    `json:"packet_size"`     // Packet payload size in bytes (e.g. 1500)
	Streams        int    `json:"streams"`         // Number of parallel worker streams (1..8)
	Duration       int    `json:"duration"`        // Duration in seconds (0 = continuous until stopped)
}

// SessionHandshake defines the control plane message exchanged between client and server
type SessionHandshake struct {
	Type           string  `json:"type"`            // "request", "accept", "reject", "report", "stop"
	SessionID      string  `json:"session_id"`
	Protocol       string  `json:"protocol"`        // "udp" or "tcp"
	Direction      string  `json:"direction"`       // "tx", "rx", "both"
	BandwidthLimit int64   `json:"bandwidth_limit"` // Target bits/sec
	PacketSize     int     `json:"packet_size"`
	Streams        int     `json:"streams"`
	Duration       int     `json:"duration"`
	UDPPort        int     `json:"udp_port,omitempty"`
	Message        string  `json:"message,omitempty"`
	RxBytes        int64   `json:"rx_bytes,omitempty"`
	RxPackets      int64   `json:"rx_packets,omitempty"`
	LostPackets    int64   `json:"lost_packets,omitempty"`
	JitterMs       float64 `json:"jitter_ms,omitempty"`
}

// LiveSample represents real-time bandwidth metrics captured at an interval (e.g. every 500ms)
type LiveSample struct {
	Timestamp   time.Time `json:"timestamp"`
	ElapsedSec  float64   `json:"elapsed_sec"`
	TxBps       int64     `json:"tx_bps"`
	RxBps       int64     `json:"rx_bps"`
	TxMbps      float64   `json:"tx_mbps"`
	RxMbps      float64   `json:"rx_mbps"`
	TxPackets   int64     `json:"tx_packets"`
	RxPackets   int64     `json:"rx_packets"`
	TxBytes     int64     `json:"tx_bytes"`
	RxBytes     int64     `json:"rx_bytes"`
	LostPackets int64     `json:"lost_packets"`
	LossPct     float64   `json:"loss_pct"`
	JitterMs    float64   `json:"jitter_ms"`
	RTTMs       float64   `json:"rtt_ms"`
}

// TestSummary represents the finalized results of a completed bandwidth test
type TestSummary struct {
	DurationSec      float64   `json:"duration_sec"`
	StartTime        time.Time `json:"start_time"`
	EndTime          time.Time `json:"end_time"`
	TotalTxBytes     int64     `json:"total_tx_bytes"`
	TotalRxBytes     int64     `json:"total_rx_bytes"`
	AvgTxMbps        float64   `json:"avg_tx_mbps"`
	AvgRxMbps        float64   `json:"avg_rx_mbps"`
	PeakTxMbps       float64   `json:"peak_tx_mbps"`
	PeakRxMbps       float64   `json:"peak_rx_mbps"`
	TotalTxPackets   int64     `json:"total_tx_packets"`
	TotalRxPackets   int64     `json:"total_rx_packets"`
	TotalLostPackets int64     `json:"total_lost_packets"`
	AvgLossPct       float64   `json:"avg_loss_pct"`
	AvgJitterMs      float64   `json:"avg_jitter_ms"`
}

// TestStatus provides a complete real-time snapshot of the active client test
type TestStatus struct {
	Running        bool          `json:"running"`
	SessionID      string        `json:"session_id"`
	Target         string        `json:"target"`
	Port           int           `json:"port"`
	Protocol       string        `json:"protocol"`
	Direction      string        `json:"direction"`
	BandwidthLimit int64         `json:"bandwidth_limit"`
	PacketSize     int           `json:"packet_size"`
	Streams        int           `json:"streams"`
	Duration       int           `json:"duration"`
	StartTime      time.Time     `json:"start_time"`
	ElapsedSec     float64       `json:"elapsed_sec"`
	CurrentSample  *LiveSample   `json:"current_sample,omitempty"`
	RecentSamples  []*LiveSample `json:"recent_samples,omitempty"`
	Summary        *TestSummary  `json:"summary,omitempty"`
	Error          string        `json:"error,omitempty"`
}

// ServerStatus provides metrics and status for the local BwTest server daemon
type ServerStatus struct {
	Enabled             bool   `json:"enabled"`
	Port                int    `json:"port"`
	Running             bool   `json:"running"`
	ActiveSessions      int    `json:"active_sessions"`
	TotalSessionsServed int64  `json:"total_sessions_served"`
	TotalBytesProcessed int64  `json:"total_bytes_processed"`
	Error               string `json:"error,omitempty"`
}

// HistoricalTestRecord stores past test results for review
type HistoricalTestRecord struct {
	ID        string       `json:"id"`
	Target    string       `json:"target"`
	Protocol  string       `json:"protocol"`
	Direction string       `json:"direction"`
	Timestamp time.Time    `json:"timestamp"`
	Summary   *TestSummary `json:"summary"`
}