package monitor

import (
	"sync"

	st "git.davoryn.de/calic/syncwarden/internal/syncthing"
)

// FolderTracker tracks per-folder status.
type FolderTracker struct {
	mu      sync.Mutex
	folders []FolderInfo
}

// NewFolderTracker creates a new folder tracker.
func NewFolderTracker() *FolderTracker {
	return &FolderTracker{}
}

// UpdateFromConfig sets the folder list from Syncthing config.
func (ft *FolderTracker) UpdateFromConfig(folders []st.FolderConfig) {
	ft.mu.Lock()
	defer ft.mu.Unlock()

	ft.folders = make([]FolderInfo, len(folders))
	for i, f := range folders {
		ft.folders[i] = FolderInfo{
			ID:    f.ID,
			Label: f.Label,
			Path:  f.Path,
			State: "unknown",
		}
		if f.Label == "" {
			ft.folders[i].Label = f.ID
		}
	}
}

// UpdateStatus updates the state for a specific folder.
func (ft *FolderTracker) UpdateStatus(folderID, state string) {
	ft.mu.Lock()
	defer ft.mu.Unlock()

	for i := range ft.folders {
		if ft.folders[i].ID == folderID {
			ft.folders[i].State = state
			return
		}
	}
}

// Folders returns a snapshot of all folder info.
func (ft *FolderTracker) Folders() []FolderInfo {
	ft.mu.Lock()
	defer ft.mu.Unlock()

	out := make([]FolderInfo, len(ft.folders))
	copy(out, ft.folders)
	return out
}