package store

import (
	"path/filepath"
	"testing"

	"tweetdistributor/output"
)

func TestStoreRoundTripThroughFile(t *testing.T) {
	path := filepath.Join(t.TempDir(), "posts.json")

	s, err := New(path)
	if err != nil {
		t.Fatal(err)
	}
	refs := Refs{
		"twitter": {ID: "123"},
		"bluesky": {URI: "at://did:plc:xyz/app.bsky.feed.post/abc", CID: "bafy"},
	}
	if err := s.Put("discord-1", refs); err != nil {
		t.Fatal(err)
	}

	reopened, err := New(path)
	if err != nil {
		t.Fatal(err)
	}
	got, ok := reopened.Get("discord-1")
	if !ok {
		t.Fatal("stored message was not found after reopening")
	}
	if got["twitter"] != (output.Ref{ID: "123"}) {
		t.Errorf("twitter ref = %+v, want ID 123", got["twitter"])
	}
	if got["bluesky"].URI != refs["bluesky"].URI {
		t.Errorf("bluesky URI = %q, want %q", got["bluesky"].URI, refs["bluesky"].URI)
	}

	if err := reopened.Delete("discord-1"); err != nil {
		t.Fatal(err)
	}
	if _, ok := reopened.Get("discord-1"); ok {
		t.Error("message is still present after Delete")
	}
}

func TestStoreMissingMessage(t *testing.T) {
	s, err := New("")
	if err != nil {
		t.Fatal(err)
	}
	if _, ok := s.Get("nope"); ok {
		t.Error("Get returned a ref for a message that was never stored")
	}
	if err := s.Delete("nope"); err != nil {
		t.Errorf("deleting an unknown message returned %s", err)
	}
}

func TestStoreEvictsOldest(t *testing.T) {
	s, err := New("")
	if err != nil {
		t.Fatal(err)
	}
	for i := 0; i < maxEntries+10; i++ {
		if err := s.Put(string(rune('a'+i%26))+string(rune(i)), Refs{"stdout": {ID: "x"}}); err != nil {
			t.Fatal(err)
		}
	}
	if len(s.refs) > maxEntries {
		t.Errorf("store holds %d entries, want at most %d", len(s.refs), maxEntries)
	}
	if len(s.order) != len(s.refs) {
		t.Errorf("order has %d entries but refs has %d", len(s.order), len(s.refs))
	}
}