package journal_test

import (
	"bytes"
	"encoding/json"
	"encoding/xml"
	"mime/multipart"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	"git.golem15.com/golem15/sm-journal-plugin/controllers"
	"git.golem15.com/golem15/sm-journal-plugin/models"
)

var png1x1 = []byte{
	0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a,
	0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52,
	0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
	0x08, 0x06, 0x00, 0x00, 0x00, 0x1f, 0x15, 0xc4,
	0x89, 0x00, 0x00, 0x00, 0x0a, 0x49, 0x44, 0x41, 0x54,
	0x78, 0x9c, 0x63, 0x00, 0x01, 0x00, 0x00, 0x05, 0x00, 0x01,
	0x0d, 0x0a, 0x2d, 0xb4, 0x00, 0x00, 0x00, 0x00,
	0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82,
}

func (e *adminEnv) callMultipart(t *testing.T, method, path, token string, fields map[string]string, fileField, fileName string, fileBody []byte) *httptest.ResponseRecorder {
	t.Helper()
	var buf bytes.Buffer
	mw := multipart.NewWriter(&buf)
	for k, v := range fields {
		if err := mw.WriteField(k, v); err != nil {
			t.Fatal(err)
		}
	}
	if fileField != "" {
		part, err := mw.CreateFormFile(fileField, fileName)
		if err != nil {
			t.Fatal(err)
		}
		if _, err := part.Write(fileBody); err != nil {
			t.Fatal(err)
		}
	}
	if err := mw.Close(); err != nil {
		t.Fatal(err)
	}
	req := httptest.NewRequest(method, path, &buf)
	req.Host = "example.com"
	req.Header.Set("Content-Type", mw.FormDataContentType())
	if token != "" {
		req.Header.Set("Authorization", "Bearer "+token)
	}
	rec := httptest.NewRecorder()
	e.h.ServeHTTP(rec, req)
	return rec
}

func TestJournal006MediaUpload(t *testing.T) {
	env := newPostsEnv(t)
	noPerm := env.admin(t)
	denied := env.callMultipart(t, http.MethodPost, "/_journal/api/v1/media/upload", noPerm, nil, "file", "cover.png", png1x1)
	if denied.Code != http.StatusForbidden {
		t.Fatalf("upload without access_posts = %d, want 403: %s", denied.Code, denied.Body.String())
	}
	if got, _ := phpErrorString(t, denied.Body.Bytes()); got != "Insufficient permissions" {
		t.Fatalf("without access_posts error = %q body=%s", got, denied.Body.String())
	}

	okTok := env.admin(t, controllers.PermissionAccessPosts)
	created := env.callMultipart(t, http.MethodPost, "/_journal/api/v1/media/upload", okTok, nil, "file", "cover.png", png1x1)
	if created.Code != http.StatusCreated {
		t.Fatalf("upload with access_posts = %d, want 201: %s", created.Code, created.Body.String())
	}
	var body struct {
		Data struct {
			URL  string `json:"url"`
			Path string `json:"path"`
		} `json:"data"`
	}
	if err := json.Unmarshal(created.Body.Bytes(), &body); err != nil {
		t.Fatalf("upload json: %s err=%v", created.Body.String(), err)
	}
	if !strings.HasPrefix(body.Data.Path, "/journal/") {
		t.Fatalf("path = %q, want prefix /journal/", body.Data.Path)
	}

	trav := env.callMultipart(t, http.MethodPost, "/_journal/api/v1/media/upload", okTok, map[string]string{"folder": "../etc"}, "file", "cover.png", png1x1)
	if trav.Code != http.StatusUnprocessableEntity {
		t.Fatalf("folder traversal = %d, want 422: %s", trav.Code, trav.Body.String())
	}
}

func TestJournalRSS(t *testing.T) {
	env := newPostsEnv(t)
	title := "Acme Journal"
	if err := env.gdb.Model(&models.Settings{}).Where("id = 1").Updates(map[string]any{
		"rss_title":           title,
		"rss_posts_per_feed":  2,
		"rss_include_content": false,
		"rss_enabled":         true,
	}).Error; err != nil {
		t.Fatal(err)
	}
	past := time.Now().UTC().Add(-time.Hour)
	for i, slug := range []string{"one", "two", "three"} {
		p := models.Post{
			Title:       "Post " + slug,
			Slug:        slug,
			Content:     "body " + slug,
			ContentHTML: "<p>body " + slug + "</p>",
			Published:   true,
			PublishedAt: ptrTime(past.Add(-time.Duration(i) * time.Minute)),
		}
		if err := env.gdb.Create(&p).Error; err != nil {
			t.Fatal(err)
		}
	}
	if err := env.gdb.Create(&models.Post{Title: "Draft", Slug: "draft-rss", Content: "no", Published: false}).Error; err != nil {
		t.Fatal(err)
	}

	rec := env.call(t, http.MethodGet, "/_journal/api/v1/rss", "", nil)
	if rec.Code != http.StatusOK {
		t.Fatalf("GET rss = %d, want 200: %s", rec.Code, rec.Body.String())
	}
	ct := rec.Header().Get("Content-Type")
	if !strings.Contains(ct, "application/rss+xml") {
		t.Fatalf("Content-Type = %q, want application/rss+xml", ct)
	}
	type rssXML struct {
		XMLName xml.Name `xml:"rss"`
		Version string   `xml:"version,attr"`
		Channel struct {
			Title string `xml:"title"`
			Items []struct {
				Title string `xml:"title"`
			} `xml:"item"`
		} `xml:"channel"`
	}
	var doc rssXML
	if err := xml.Unmarshal(rec.Body.Bytes(), &doc); err != nil {
		t.Fatalf("rss xml: %v body=%s", err, rec.Body.String())
	}
	if doc.Version != "2.0" {
		t.Fatalf("rss version = %q, want 2.0", doc.Version)
	}
	if doc.Channel.Title != title {
		t.Fatalf("channel title = %q, want %q", doc.Channel.Title, title)
	}
	if len(doc.Channel.Items) != 2 {
		t.Fatalf("item count = %d, want 2 (rss_posts_per_feed): %s", len(doc.Channel.Items), rec.Body.String())
	}
	for _, item := range doc.Channel.Items {
		if item.Title == "Draft" {
			t.Fatal("unpublished post appeared in RSS")
		}
	}
	if strings.Contains(rec.Body.String(), "content:encoded") {
		t.Fatal("rss_include_content false still emitted content:encoded")
	}

	if err := env.gdb.Model(&models.Settings{}).Where("id = 1").Updates(map[string]any{
		"rss_include_content": true,
	}).Error; err != nil {
		t.Fatal(err)
	}
	withContent := env.call(t, http.MethodGet, "/_journal/api/v1/rss", "", nil)
	if !strings.Contains(withContent.Body.String(), "content:encoded") {
		t.Fatalf("rss_include_content true missing content:encoded: %s", withContent.Body.String())
	}

	if err := env.gdb.Model(&models.Settings{}).Where("id = 1").Update("rss_enabled", false).Error; err != nil {
		t.Fatal(err)
	}
	disabled := env.call(t, http.MethodGet, "/_journal/api/v1/rss", "", nil)
	if disabled.Code != http.StatusOK {
		t.Fatalf("rss_enabled false = %d, want 200", disabled.Code)
	}
	var disabledDoc rssXML
	if err := xml.Unmarshal(disabled.Body.Bytes(), &disabledDoc); err != nil {
		t.Fatalf("rss_enabled false is not well-formed: %v %s", err, disabled.Body.String())
	}
	if disabledDoc.Version != "2.0" || disabledDoc.Channel.Title == "" {
		t.Fatalf("rss_enabled false missing channel: %+v", disabledDoc)
	}
}

func ptrTime(t time.Time) *time.Time { return &t }