//go:build linux

package discovery

import (
	"fmt"
	"os/exec"
	"regexp"
	"sort"
	"strconv"
	"strings"

	"ai-status-light/internal/logger"
)

func findByPID() []int {
	var ports []int
	pidRegex := regexp.MustCompile(`(?:^|/)opencode(?:\s|$)`)

	out, err := exec.Command("ps", "aux").Output()
	if err != nil {
		logger.Debug("执行 ps aux 失败: %v", err)
		return ports
	}

	var pids []int
	for _, line := range strings.Split(string(out), "\n") {
		if pidRegex.MatchString(line) && !strings.Contains(line, "grep") {
			fields := strings.Fields(line)
			if len(fields) > 1 {
				if pid, err := strconv.Atoi(fields[1]); err == nil {
					pids = append(pids, pid)
				}
			}
		}
	}

	if len(pids) == 0 {
		logger.Debug("未找到 opencode 进程")
		return ports
	}
	logger.Debug("发现 opencode 进程 PID: %v", pids)

	for _, pid := range pids {
		ssOut, err := exec.Command("ss", "-tlnp").Output()
		if err != nil {
			logger.Debug("执行 ss -tlnp 失败: %v", err)
			continue
		}

		for _, line := range strings.Split(string(ssOut), "\n") {
			if strings.Contains(line, fmt.Sprintf("pid=%d", pid)) {
				fields := strings.Fields(line)
				for _, f := range fields {
					if strings.Contains(f, ":") {
						parts := strings.Split(f, ":")
						if len(parts) == 2 {
							if port, err := strconv.Atoi(parts[1]); err == nil {
								if port > 0 && port < 65535 && !contains(ports, port) {
									ports = append(ports, port)
								}
							}
						}
					}
				}
			}
		}
	}

	sort.Ints(ports)
	return ports
}

func findByCmdline() []int {
	var ports []int

	out, err := exec.Command("ps", "aux").Output()
	if err != nil {
		logger.Debug("执行 ps aux 失败: %v", err)
		return ports
	}

	for _, line := range strings.Split(string(out), "\n") {
		if strings.Contains(line, "opencode") && !strings.Contains(line, "opencode-monitor") && !strings.Contains(line, "grep") {
			if strings.Contains(line, "--port") {
				fields := strings.Fields(line)
				for i, f := range fields {
					if f == "--port" && i+1 < len(fields) {
						if port, err := strconv.Atoi(fields[i+1]); err == nil {
							if !contains(ports, port) {
								ports = append(ports, port)
							}
						}
					}
				}
			}
		}
	}

	sort.Ints(ports)
	return ports
}