package index

import (
	"sync"
)

// Entry is the index record returned to clients.
// Keep metadata minimal to protect users.
type Entry struct {
	Hash      string `json:"hash"`
	Bytes     int64  `json:"bytes"`
	StoredAt  string `json:"stored_at"` // RFC3339Nano string
	Private   bool   `json:"private"`
	CreatorTZ string `json:"creator_tz,omitempty"`
	Author    string `json:"author,omitempty"` // pseudonymous (thumbprint), optional
}

type Index struct {
	mu   sync.RWMutex
	data map[string]Entry
}

func New() *Index {
	return &Index{data: make(map[string]Entry)}
}

func (ix *Index) Put(e Entry) error {
	ix.mu.Lock()
	ix.data[e.Hash] = e
	ix.mu.Unlock()
	return nil
}

func (ix *Index) Delete(hash string) error {
	ix.mu.Lock()
	delete(ix.data, hash)
	ix.mu.Unlock()
	return nil
}

func (ix *Index) All() []Entry {
	ix.mu.RLock()
	out := make([]Entry, 0, len(ix.data))
	for _, e := range ix.data {
		out = append(out, e)
	}
	ix.mu.RUnlock()
	return out
}