// Package status loads and manages the service status JSON.
package status

import (
	"encoding/json"
	"os"
	"sync"
	"time"
)

var mu sync.RWMutex

// Service represents a single monitored service.
type Service struct {
	Name        string `json:"name"`
	Description string `json:"description"`
	URL         string `json:"url,omitempty"`
	CheckURL    string `json:"check_url,omitempty"` // HTTP URL probed automatically; empty = manual
	Status      string `json:"status"`              // "up", "degraded", "down", "unknown"
	Note        string `json:"note,omitempty"`
}

// Page is the full status page data loaded from JSON.
type Page struct {
	LastChecked time.Time `json:"last_checked"`
	Services    []Service `json:"services"`
}

// Load reads and parses the status JSON from path.
func Load(path string) (*Page, error) {
	mu.RLock()
	defer mu.RUnlock()
	return load(path)
}

func load(path string) (*Page, error) {
	raw, err := os.ReadFile(path)
	if err != nil {
		return nil, err
	}
	var p Page
	if err := json.Unmarshal(raw, &p); err != nil {
		return nil, err
	}
	return &p, nil
}

// Save writes the status page data back to path.
func Save(path string, p *Page) error {
	mu.Lock()
	defer mu.Unlock()
	p.LastChecked = time.Now().UTC()
	raw, err := json.MarshalIndent(p, "", "  ")
	if err != nil {
		return err
	}
	return os.WriteFile(path, raw, 0644)
}