package server

import (
	"bytes"
	"context"
	"encoding/json"
	"mime/multipart"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"testing"
)

func TestArtifactUploadCreatesReadableArtifactForSourceArtifactID(t *testing.T) {
	cfg := Config{
		SQLitePath:    filepath.Join(t.TempDir(), "popiart.db"),
		SkillhubDir:   makeEmptySkillhub(t),
		SessionSecret: "test-secret",
	}
	server, err := NewWithConfig(cfg)
	if err != nil {
		t.Fatalf("NewWithConfig: %v", err)
	}

	sessionToken, _, ok, err := server.store.createSession("sk-upload-user")
	if err != nil {
		t.Fatalf("createSession: %v", err)
	}
	if !ok {
		t.Fatal("expected session creation to succeed")
	}
	current, exists, err := server.store.session(sessionToken)
	if err != nil {
		t.Fatalf("load session: %v", err)
	}
	if !exists {
		t.Fatal("expected stored session")
	}

	imageBytes := tinyPNG(t)
	var body bytes.Buffer
	writer := multipart.NewWriter(&body)
	if err := writer.WriteField("role", "source"); err != nil {
		t.Fatalf("write role field: %v", err)
	}
	if err := writer.WriteField("metadata_json", `{"origin":"chat-upload"}`); err != nil {
		t.Fatalf("write metadata field: %v", err)
	}
	part, err := writer.CreateFormFile("file", "chat-upload.png")
	if err != nil {
		t.Fatalf("create form file: %v", err)
	}
	if _, err := part.Write(imageBytes); err != nil {
		t.Fatalf("write form file: %v", err)
	}
	if err := writer.Close(); err != nil {
		t.Fatalf("close multipart writer: %v", err)
	}

	req := httptest.NewRequest(http.MethodPost, "/v1/artifacts/upload", &body)
	req.Header.Set("Authorization", "Bearer "+sessionToken)
	req.Header.Set("Content-Type", writer.FormDataContentType())
	rec := httptest.NewRecorder()
	server.Handler().ServeHTTP(rec, req)

	if rec.Code != http.StatusCreated {
		t.Fatalf("expected status 201, got %d body=%s", rec.Code, rec.Body.String())
	}

	var envelope struct {
		OK   bool     `json:"ok"`
		Data artifact `json:"data"`
	}
	if err := json.Unmarshal(rec.Body.Bytes(), &envelope); err != nil {
		t.Fatalf("decode upload response: %v body=%s", err, rec.Body.String())
	}
	if !envelope.OK {
		t.Fatalf("expected ok upload response, got %s", rec.Body.String())
	}
	if envelope.Data.ID == "" {
		t.Fatalf("expected artifact id, got %#v", envelope.Data)
	}
	if envelope.Data.ContentType != "image/png" {
		t.Fatalf("expected image/png, got %q", envelope.Data.ContentType)
	}

	editRef, err := server.resolveImageToImageReference(context.Background(), &job{
		UserID:      current.User.ID,
		UpstreamKey: current.UpstreamKey,
		SkillID:     "popiskill-image-img2img-basic-v1",
	}, map[string]any{
		"source_artifact_id": envelope.Data.ID,
	})
	if err != nil {
		t.Fatalf("resolveImageToImageReference: %v", err)
	}
	if editRef.ContentType != "image/png" {
		t.Fatalf("expected resolved content type image/png, got %q", editRef.ContentType)
	}
	if !bytes.Equal(editRef.Content, imageBytes) {
		t.Fatal("expected resolved reference content to match uploaded bytes")
	}
}