package freedoc_test

import (
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"chat-agent-system/internal/docrevision"
	"chat-agent-system/internal/freedoc"
)

func TestCreateDocument_ClientKeyIdempotentAndBootstrapsLedger(t *testing.T) {
	ctx := context.Background()
	rev := docrevision.NewService(nil)
	svc := freedoc.NewService(nil, nil)
	svc.SetDocRevision(rev)

	detail, err := svc.CreateDocument(ctx, 42, freedoc.CreateFreeformDocRequest{
		ProjectID:       7,
		Title:           "超声探头规格.pdf",
		ContentMarkdown: "# 超声探头规格\n\n上传正文基线\n",
		Space:           "my_private",
		ClientKey:       "doc-upload-1789263145197-0",
	})
	require.NoError(t, err)
	require.NotNil(t, detail)
	assert.True(t, len(detail.Document.DocID) > 0)
	assert.True(t, detail.Document.DocID[:8] == "doc-free" || detail.Document.DocID[:9] == "doc-free-")
	require.NotNil(t, detail.Document.ClientKey)
	assert.Equal(t, "doc-upload-1789263145197-0", *detail.Document.ClientKey)
	assert.Equal(t, "freeform", detail.Document.GovernanceMode)
	// source_content_sha256 must remain content fingerprint — never client_key prefix
	assert.NotContains(t, detail.Document.SourceContentSHA256, "doc-upload")
	assert.NotContains(t, detail.Document.SourceContentSHA256, "client_key")
	assert.Len(t, detail.Document.SourceContentSHA256, 64)

	st, err := rev.GetRevisionState(ctx, detail.Document.DocID)
	require.NoError(t, err)
	assert.GreaterOrEqual(t, st.CurrentVersionNo, 1)

	again, err := svc.CreateDocument(ctx, 42, freedoc.CreateFreeformDocRequest{
		ProjectID:       7,
		Title:           "超声探头规格.pdf",
		ContentMarkdown: "# 超声探头规格\n\n上传正文基线\n",
		ClientKey:       "doc-upload-1789263145197-0",
	})
	require.NoError(t, err)
	assert.Equal(t, detail.Document.DocID, again.Document.DocID)

	otherUser, err := svc.CreateDocument(ctx, 99, freedoc.CreateFreeformDocRequest{
		ProjectID:       7,
		Title:           "他人同名键",
		ContentMarkdown: "# other\n",
		ClientKey:       "doc-upload-1789263145197-0",
	})
	require.NoError(t, err)
	assert.NotEqual(t, detail.Document.DocID, otherUser.Document.DocID)
}

func TestCreateDocument_RejectsEmptyContent(t *testing.T) {
	svc := freedoc.NewService(nil, nil)
	_, err := svc.CreateDocument(context.Background(), 1, freedoc.CreateFreeformDocRequest{
		ProjectID: 1, Title: "x", ContentMarkdown: "   ",
	})
	assert.ErrorIs(t, err, freedoc.ErrInvalidParam)
}

func TestCreateDocument_RequiresProjectIDAndPrivateSpace(t *testing.T) {
	svc := freedoc.NewService(nil, nil)
	_, err := svc.CreateDocument(context.Background(), 1, freedoc.CreateFreeformDocRequest{
		ProjectID: 0, Title: "x", ContentMarkdown: "# x\n",
	})
	assert.ErrorIs(t, err, freedoc.ErrInvalidParam)
	assert.Contains(t, err.Error(), "project_id")

	_, err = svc.CreateDocument(context.Background(), 1, freedoc.CreateFreeformDocRequest{
		ProjectID: 1, Title: "x", ContentMarkdown: "# x\n", Space: "project_shared",
	})
	assert.ErrorIs(t, err, freedoc.ErrInvalidParam)
	assert.Contains(t, err.Error(), "my_private")
}