package app

import (
	"context"
	"errors"
	"os"
	"path/filepath"
	"reflect"
	"testing"
)

func TestChatMediaObjectKeys(t *testing.T) {
	tests := []struct {
		name      string
		objectKey string
		mediaType string
		want      []string
	}{
		{name: "chat image includes thumbnail", objectKey: "media/2026/09/1-2-im1.png", mediaType: "image", want: []string{"media/2026/09/1-2-im1.png", "media/2026/09/1-2-im1-thumb.jpg"}},
		{name: "voice only has original", objectKey: "media/2026/09/1-2.m4a", mediaType: "voice", want: []string{"media/2026/09/1-2.m4a"}},
		{name: "unrecognized image does not guess siblings", objectKey: "imported/photo.jpg", mediaType: "image", want: []string{"imported/photo.jpg"}},
		{name: "empty key", objectKey: "", mediaType: "image", want: nil},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			if got := chatMediaObjectKeys(test.objectKey, test.mediaType); !reflect.DeepEqual(got, test.want) {
				t.Fatalf("chatMediaObjectKeys() = %#v, want %#v", got, test.want)
			}
		})
	}
}

func TestChatMediaRetentionClamp(t *testing.T) {
	for input, want := range map[int]int{-1: 90, 0: 90, 1: 1, 3650: 3650, 3651: 90} {
		if got := clampChatMediaRetentionDays(input); got != want {
			t.Fatalf("clampChatMediaRetentionDays(%d) = %d, want %d", input, got, want)
		}
	}
}

func TestMissingMediaObjectDetection(t *testing.T) {
	if !isMissingMediaObject(os.ErrNotExist) || !isMissingMediaObject(errors.New("NoSuchKey")) || isMissingMediaObject(errors.New("permission denied")) {
		t.Fatal("missing-object detection did not classify storage errors correctly")
	}
}

func TestChatMediaCleanupMySQL(t *testing.T) {
	db := isolatedIMDatabase(t)
	directory := t.TempDir()
	if _, err := db.Exec(`UPDATE system_configs SET config_value=? WHERE config_key='storage.local.directory'`, directory); err != nil {
		t.Fatal(err)
	}
	const mainKey = "1-100-im1.png"
	const thumbnailKey = "1-100-im1-thumb.jpg"
	for _, name := range []string{mainKey, thumbnailKey} {
		if err := os.WriteFile(filepath.Join(directory, name), []byte("media"), 0o600); err != nil {
			t.Fatal(err)
		}
	}
	if _, err := db.Exec(`INSERT INTO im_conversations(id,conversation_type,last_seq) VALUES(100,1,1)`); err != nil {
		t.Fatal(err)
	}
	result, err := db.Exec(`INSERT INTO media_assets(owner_user_id,media_type,storage_provider,object_key,public_url,mime_type,file_size,status) VALUES(1,'image','local',?,'https://media.example/chat.png','image/png',5,1)`, mainKey)
	if err != nil {
		t.Fatal(err)
	}
	assetID, _ := result.LastInsertId()
	result, err = db.Exec(`INSERT INTO im_messages(conversation_id,seq,sender_id,client_msg_id,message_type,body) VALUES(100,1,1,'cleanup-test-message-0001',2,'{"url":"https://media.example/chat.png"}')`)
	if err != nil {
		t.Fatal(err)
	}
	messageID, _ := result.LastInsertId()
	if _, err = db.Exec(`INSERT INTO im_message_media(message_id,media_asset_id,media_type,public_url,status) VALUES(?,?,'image','https://media.example/chat.png',1)`, messageID, assetID); err != nil {
		t.Fatal(err)
	}

	a := &App{db: db, config: Config{MediaDir: directory}, hub: NewHub()}
	deleted, err := a.cleanupChatMedia(context.Background(), messageID, "test cleanup")
	if err != nil || !deleted {
		t.Fatalf("cleanupChatMedia() deleted=%v err=%v", deleted, err)
	}
	for _, name := range []string{mainKey, thumbnailKey} {
		if _, statErr := os.Stat(filepath.Join(directory, name)); !os.IsNotExist(statErr) {
			t.Fatalf("expected %s to be removed, stat error=%v", name, statErr)
		}
	}
	var mediaStatus, assetStatus int
	if err = db.QueryRow(`SELECT status FROM im_message_media WHERE message_id=?`, messageID).Scan(&mediaStatus); err != nil {
		t.Fatal(err)
	}
	if err = db.QueryRow(`SELECT status FROM media_assets WHERE id=?`, assetID).Scan(&assetStatus); err != nil {
		t.Fatal(err)
	}
	if mediaStatus != 0 || assetStatus != 0 {
		t.Fatalf("cleanup statuses media=%d asset=%d, want both 0", mediaStatus, assetStatus)
	}
	loaded := a.loadMessageContext(context.Background(), messageID)
	if !loaded.MediaDeleted || !loaded.Recalled || loaded.Content != nil {
		t.Fatalf("deleted media must be hidden from clients: %#v", loaded)
	}
}