package tunergenius

import (
	"bufio"
	"fmt"
	"net"
	"strings"
	"time"

	. "git.rouggy.com/rouggy/ShackMaster/internal/devices"
)

type Client struct {
	host string
	port int
	conn net.Conn
}

type Status struct {
	Operate       bool    `json:"operate"`        // true = OPERATE, false = STANDBY
	Bypass        bool    `json:"bypass"`         // Bypass mode
	ActiveAntenna int     `json:"active_antenna"` // 0=ANT1, 1=ANT2, 2=ANT3
	TuningStatus  string  `json:"tuning_status"`
	FrequencyA    float64 `json:"frequency_a"`
	FrequencyB    float64 `json:"frequency_b"`
	C1            int     `json:"c1"`
	L             int     `json:"l"`
	C2            int     `json:"c2"`
	SWR           float64 `json:"swr"`
	Power         float64 `json:"power"`
	Temperature   float64 `json:"temperature"`
	Connected     bool    `json:"connected"`
}

func New(host string, port int) *Client {
	return &Client{
		host: host,
		port: port,
	}
}

func (c *Client) Connect() error {
	conn, err := net.DialTimeout("tcp", fmt.Sprintf("%s:%d", c.host, c.port), 5*time.Second)
	if err != nil {
		return fmt.Errorf("failed to connect: %w", err)
	}
	c.conn = conn
	return nil
}

func (c *Client) Close() error {
	if c.conn != nil {
		return c.conn.Close()
	}
	return nil
}

func (c *Client) sendCommand(cmd string) (string, error) {
	if c.conn == nil {
		if err := c.Connect(); err != nil {
			return "", err
		}
	}

	// Get next command ID from global counter
	cmdID := GetGlobalCommandID().GetNextID()

	// Format command with ID: C<id>|<command>
	fullCmd := fmt.Sprintf("C%d|%s\n", cmdID, cmd)

	// Send command
	_, err := c.conn.Write([]byte(fullCmd))
	if err != nil {
		c.conn = nil
		return "", fmt.Errorf("failed to send command: %w", err)
	}

	// Read response
	reader := bufio.NewReader(c.conn)
	response, err := reader.ReadString('\n')
	if err != nil {
		c.conn = nil
		return "", fmt.Errorf("failed to read response: %w", err)
	}

	return strings.TrimSpace(response), nil
}

func (c *Client) GetStatus() (*Status, error) {
	resp, err := c.sendCommand("status")
	if err != nil {
		return nil, err
	}

	// Parse the response - format will depend on actual device response
	// This is a placeholder that should be updated based on real response format
	status := &Status{
		Connected: true,
	}

	// TODO: Parse actual status response from device
	// The response format needs to be determined from real device testing
	// For now, we just check if we got a response
	_ = resp // Temporary: will be used when we parse the actual response format

	return status, nil
}

func (c *Client) SetOperate(operate bool) error {
	var state int
	if operate {
		state = 1
	}

	cmd := fmt.Sprintf("operate set=%d", state)
	resp, err := c.sendCommand(cmd)
	if err != nil {
		return err
	}

	// Check if command was successful
	if resp == "" {
		return fmt.Errorf("empty response from device")
	}

	return nil
}

func (c *Client) SetBypass(bypass bool) error {
	var state int
	if bypass {
		state = 1
	}

	cmd := fmt.Sprintf("bypass set=%d", state)
	resp, err := c.sendCommand(cmd)
	if err != nil {
		return err
	}

	// Check if command was successful
	if resp == "" {
		return fmt.Errorf("empty response from device")
	}

	return nil
}

func (c *Client) ActivateAntenna(antenna int) error {
	if antenna < 0 || antenna > 2 {
		return fmt.Errorf("antenna must be 0 (ANT1), 1 (ANT2), or 2 (ANT3)")
	}

	cmd := fmt.Sprintf("activate ant=%d", antenna)
	resp, err := c.sendCommand(cmd)
	if err != nil {
		return err
	}

	// Check if command was successful
	if resp == "" {
		return fmt.Errorf("empty response from device")
	}

	return nil
}

func (c *Client) AutoTune() error {
	resp, err := c.sendCommand("autotune")
	if err != nil {
		return err
	}

	// Check if command was successful
	if resp == "" {
		return fmt.Errorf("empty response from device")
	}

	return nil
}

// TuneRelay adjusts tuning parameters manually
// relay: 0=C1, 1=L, 2=C2
// move: -1 to decrease, 1 to increase
func (c *Client) TuneRelay(relay int, move int) error {
	if relay < 0 || relay > 2 {
		return fmt.Errorf("relay must be 0 (C1), 1 (L), or 2 (C2)")
	}
	if move != -1 && move != 1 {
		return fmt.Errorf("move must be -1 or 1")
	}

	cmd := fmt.Sprintf("tune relay=%d move=%d", relay, move)
	resp, err := c.sendCommand(cmd)
	if err != nil {
		return err
	}

	// Check if command was successful
	if resp == "" {
		return fmt.Errorf("empty response from device")
	}

	return nil
}