package supervisor

import (
	"encoding/json"
	"fmt"
	"os"
	"sort"
)

type Supervisor struct {
	Processes []*Process `json:"processes"`
}

func ReadTemplate(path string) (supervisor Supervisor, err error) {
	content, err := os.ReadFile(path)
	if err != nil {
		return
	}

	err = json.Unmarshal(content, &supervisor)
	return
}

func (s *Supervisor) StartProcesses() error {
	sort.Slice(s.Processes, func(i, j int) bool {
		return s.Processes[i].Priority < s.Processes[j].Priority
	})

	for _, p := range s.Processes {
		p.Start()
	}
	return nil
}

func (s *Supervisor) GetProcesses() (processes []Process) {
	for _, p := range s.Processes {
		processes = append(processes, *p)
	}
	return
}

func (s *Supervisor) StartProcessByName(name string) error {
	for _, p := range s.Processes {
		if p.Name == name {
			return p.Start()
		}
	}
	return fmt.Errorf("process %s not found", name)
}

func (s *Supervisor) StopProcessByName(name string) error {
	for _, p := range s.Processes {
		if p.Name == name {
			return p.Stop()
		}
	}
	return fmt.Errorf("process %s not found", name)
}