package test

import (
	"RenewCMS/api/pkg/apperr"
	"net/http"
	"testing"

	domainImage "RenewCMS/internal/domain/image"
)

func TestUploadArticleImageHttp(t *testing.T) {
	newEnv := func(t *testing.T) *mediaEnv {
		env := newMediaEnv(t)
		env.seedArticle(1, "Backyard Renovation Update", true, "unchanged body")
		return env
	}

	t.Run("Uploading through the alias creates a library image", func(t *testing.T) {
		env := newEnv(t)

		req := newMultipartFileRequest(t, http.MethodPost, "/v1/article/1/image", "before.png", "image/png", pngBytes(t, 3, 2))
		rec := env.serve(t, req, mediaVerifiedUserId)

		if rec.Code != http.StatusCreated {
			t.Fatalf("expected status 201, got %d, body %q", rec.Code, rec.Body.String())
		}
		got := decodeObject(t, rec.Body.String())
		if len(env.images.images) != 1 {
			t.Fatalf("expected exactly one library image, got %d", len(env.images.images))
		}
		created := env.images.images[1]
		if numberOf(got["id"]) != created.ID {
			t.Errorf("expected id %d, got %v", created.ID, got["id"])
		}
		if got["location"] != created.Path {
			t.Errorf("expected location %q, got %v", created.Path, got["location"])
		}
		if created.UploadedByID != mediaVerifiedUserId {
			t.Errorf("expected UploadedByID 1, got %d", created.UploadedByID)
		}

		listing := env.send(t, http.MethodGet, "/v1/media/", "", mediaVerifiedUserId)
		items := decodeObject(t, listing.Body.String())["items"].([]any)
		if len(items) != 1 || items[0].(map[string]any)["uploaded_by"] != "Inès Duarte" {
			t.Errorf("expected the media list to hold the image uploaded by user 1, got %v", items)
		}
		if env.articles.articles[1].Body != "unchanged body" {
			t.Errorf("expected article 1 to be unchanged, got %+v", env.articles.articles[1])
		}
	})

	t.Run("An unknown article is 404 and creates no image", func(t *testing.T) {
		env := newEnv(t)

		req := newMultipartFileRequest(t, http.MethodPost, "/v1/article/9999/image", "before.png", "image/png", pngBytes(t, 3, 2))
		rec := env.serve(t, req, mediaVerifiedUserId)

		if rec.Code != http.StatusNotFound {
			t.Fatalf("expected status 404, got %d", rec.Code)
		}
		if rec.Body.String() != apperr.ArticleNotFoundErrorMessage+"\n" {
			t.Errorf("unexpected body: %q", rec.Body.String())
		}
		if env.images.createCalls != 0 {
			t.Errorf("expected Create to never be called, got %d calls", env.images.createCalls)
		}
	})

	t.Run("Rejected files use the media status codes", func(t *testing.T) {
		examples := []struct {
			name        string
			filename    string
			contentType string
			content     []byte
			status      int
		}{
			{"notes.pdf as application/pdf", "notes.pdf", "application/pdf", []byte("%PDF"), http.StatusUnsupportedMediaType},
			{"a valid PNG padded to 10485761 bytes", "huge.png", "image/png", paddedPngBytes(t, int(domainImage.MaxImageSize)+1), http.StatusRequestEntityTooLarge},
			{"broken.png as image/png with text bytes", "broken.png", "image/png", []byte("not an image"), http.StatusBadRequest},
		}
		for _, example := range examples {
			t.Run(example.name, func(t *testing.T) {
				env := newEnv(t)

				req := newMultipartFileRequest(t, http.MethodPost, "/v1/article/1/image", example.filename, example.contentType, example.content)
				rec := env.serve(t, req, mediaVerifiedUserId)

				if rec.Code != example.status {
					t.Fatalf("expected status %d, got %d", example.status, rec.Code)
				}
				if env.images.createCalls != 0 {
					t.Errorf("expected Create to never be called, got %d calls", env.images.createCalls)
				}
			})
		}
	})

	t.Run("The alias still requires authentication", func(t *testing.T) {
		env := newEnv(t)

		req := newMultipartFileRequest(t, http.MethodPost, "/v1/article/1/image", "before.png", "image/png", pngBytes(t, 3, 2))
		rec := env.serve(t, req, 0)

		if rec.Code != http.StatusUnauthorized {
			t.Fatalf("expected status 401, got %d", rec.Code)
		}
		if env.images.createCalls != 0 {
			t.Errorf("expected Create to never be called, got %d calls", env.images.createCalls)
		}
	})

	t.Run("The removed delete route is gone", func(t *testing.T) {
		env := newEnv(t)
		env.seedImage(10, "before.png", 10, "image/png", 3, 2, sha256Hex([]byte("x")), 1)

		rec := env.send(t, http.MethodDelete, "/v1/article/1/image/10", "", mediaVerifiedUserId)

		if rec.Code != http.StatusNotFound && rec.Code != http.StatusMethodNotAllowed {
			t.Fatalf("expected status 404 or 405, got %d", rec.Code)
		}
		if _, ok := env.images.images[10]; !ok {
			t.Errorf("expected image 10 to still exist")
		}
		if len(env.images.deleteCalls) != 0 {
			t.Errorf("expected Delete to never be called, got %v", env.images.deleteCalls)
		}
	})

	t.Run("Uploading with a non-numeric article id answers 400", func(t *testing.T) {
		env := newEnv(t)

		req := newMultipartFileRequest(t, http.MethodPost, "/v1/article/abc/image", "before.png", "image/png", pngBytes(t, 3, 2))
		rec := env.serve(t, req, mediaVerifiedUserId)

		if rec.Code != http.StatusBadRequest || rec.Body.String() != apperr.IdUint32ErrorMessage+"\n" {
			t.Fatalf("expected 400 with the id message, got %d %q", rec.Code, rec.Body.String())
		}
	})

	t.Run("Uploading without a file field answers 400", func(t *testing.T) {
		env := newEnv(t)

		rec := env.serve(t, newMultipartWithoutFileRequest(t, "/v1/article/1/image"), mediaVerifiedUserId)

		if rec.Code != http.StatusBadRequest {
			t.Fatalf("expected status 400, got %d", rec.Code)
		}
		if env.images.createCalls != 0 {
			t.Errorf("expected Create to never be called, got %d calls", env.images.createCalls)
		}
	})

	t.Run("A repository failure while fetching the article answers 500", func(t *testing.T) {
		env := newEnv(t)
		env.articles.fail.failNext("Get")

		req := newMultipartFileRequest(t, http.MethodPost, "/v1/article/1/image", "before.png", "image/png", pngBytes(t, 3, 2))
		rec := env.serve(t, req, mediaVerifiedUserId)

		if rec.Code != http.StatusInternalServerError {
			t.Fatalf("expected status 500, got %d", rec.Code)
		}
	})

	t.Run("A repository failure while creating the image answers 500", func(t *testing.T) {
		env := newEnv(t)
		env.images.fail.failNext("Create")

		req := newMultipartFileRequest(t, http.MethodPost, "/v1/article/1/image", "before.png", "image/png", pngBytes(t, 3, 2))
		rec := env.serve(t, req, mediaVerifiedUserId)

		if rec.Code != http.StatusInternalServerError {
			t.Fatalf("expected status 500, got %d", rec.Code)
		}
	})
}