package service

import (
	"context"
	"strings"
	"testing"

	"github.com/Tencent/WeKnora/internal/types"
	"github.com/stretchr/testify/require"
)

type digitalHumanTestReader struct {
	request *types.ReadRequest
	result  *types.ReadResult
	err     error
}

func (r *digitalHumanTestReader) Read(_ context.Context, request *types.ReadRequest) (*types.ReadResult, error) {
	r.request = request
	return r.result, r.err
}

func TestDigitalHumanUploadPreservesSubtitleEvidence(t *testing.T) {
	service := &DigitalHumanService{}
	for _, ext := range []string{"TXT", "md", "markdown", "srt", "vtt"} {
		source, err := service.readDigitalHumanUpload(context.Background(), DigitalHumanUpload{Name: "source." + ext, Data: []byte("\ufeff1\n00:00:01,000 --> 00:00:02,000\nOriginal words\n")})
		require.NoError(t, err)
		require.Equal(t, "1\n00:00:01,000 --> 00:00:02,000\nOriginal words", source.Text)
	}
}

func TestDigitalHumanUploadRejectsInvalidOrTruncatedMaterials(t *testing.T) {
	service := &DigitalHumanService{}
	for _, file := range []DigitalHumanUpload{
		{Name: "source.exe", Data: []byte("text")},
		{Name: "empty.pdf"},
		{Name: "empty.txt", Data: []byte("  \n")},
		{Name: "invalid.txt", Data: []byte{0xff}},
		{Name: "large.pdf", Data: make([]byte, DigitalHumanFileLimit+1)},
		{Name: "too-many-words.txt", Data: []byte(strings.Repeat("x", digitalHumanSourceLimit+1))},
	} {
		_, err := service.readDigitalHumanUpload(context.Background(), file)
		require.Error(t, err, file.Name)
	}
}

func TestDigitalHumanUploadDispatchesDocumentsToReader(t *testing.T) {
	if types.DefaultParserEngine("pdf") == "anydoc" {
		t.Skip("linked builds exercise the local parser instead of the remote transport")
	}
	reader := &digitalHumanTestReader{result: &types.ReadResult{MarkdownContent: "# Source\nAll source evidence"}}
	service := &DigitalHumanService{reader: reader}
	for _, ext := range []string{"doc", "docx", "pdf", "ppt", "pptx", "rtf", "odt"} {
		source, err := service.readDigitalHumanUpload(context.Background(), DigitalHumanUpload{Name: "source." + ext, Data: []byte("document bytes")})
		require.NoError(t, err, ext)
		require.Equal(t, "# Source\nAll source evidence", source.Text)
		require.Equal(t, ext, reader.request.FileType)
		require.Equal(t, "false", reader.request.ParserEngineOverrides["anydoc_extract_images"])
	}
	reader.result = &types.ReadResult{}
	_, err := service.readDigitalHumanUpload(context.Background(), DigitalHumanUpload{Name: "scan.pdf", Data: []byte("scan")})
	require.Error(t, err)
}