package files_test

import (
	"net/http"
	"os"
	"path/filepath"
	"testing"

	"rickub.com/bots-garden/ori/internal/files"
)

var pngHeader = []byte{0x89, 'P', 'N', 'G', 0x0d, 0x0a, 0x1a, 0x0a, 0, 0, 0, 0}

func TestRawStreamsBytesWithImageContentType(t *testing.T) {
	root, h := workspace(t)
	if err := os.WriteFile(filepath.Join(root, "logo.png"), pngHeader, 0o644); err != nil {
		t.Fatal(err)
	}

	rec := do(t, h, http.MethodGet, "/api/raw?path=logo.png", "")
	if rec.Code != http.StatusOK {
		t.Fatalf("GET raw = %d (%s)", rec.Code, rec.Body.String())
	}
	if got := rec.Header().Get("Content-Type"); got != "image/png" {
		t.Errorf("Content-Type = %q, want image/png", got)
	}
	if got := rec.Body.Bytes(); string(got) != string(pngHeader) {
		t.Errorf("body = %v, want the exact file bytes", got)
	}
	if rec.Header().Get("Content-Length") != "12" {
		t.Errorf("Content-Length = %q, want 12", rec.Header().Get("Content-Length"))
	}
}

func TestRawAcceptsAbsolutePathsLikeTheOtherEndpoints(t *testing.T) {
	root, h := workspace(t)
	rec := do(t, h, http.MethodGet, "/api/raw?path="+filepath.Join(root, "README.md"), "")
	if rec.Code != http.StatusOK || rec.Body.String() != "# hello" {
		t.Errorf("absolute raw read = %d %q", rec.Code, rec.Body.String())
	}
	if got := rec.Header().Get("Content-Type"); got != "text/markdown; charset=utf-8" {
		t.Errorf("Content-Type = %q, want the mime table's markdown type", got)
	}
}

func TestRawErrors(t *testing.T) {
	_, h := workspace(t)
	cases := []struct {
		target string
		want   int
	}{
		{"/api/raw", http.StatusBadRequest},
		{"/api/raw?path=src", http.StatusBadRequest},
		{"/api/raw?path=ghost.png", http.StatusNotFound},
	}
	for _, tc := range cases {
		if rec := do(t, h, http.MethodGet, tc.target, ""); rec.Code != tc.want {
			t.Errorf("GET %s = %d, want %d", tc.target, rec.Code, tc.want)
		}
	}
}

func TestContentTypeFor(t *testing.T) {
	cases := []struct {
		path string
		head []byte
		want string
	}{
		{"a.png", nil, "image/png"},
		{"a.JPG", nil, "image/jpeg"},
		{"a.jpeg", nil, "image/jpeg"},
		{"a.gif", nil, "image/gif"},
		{"a.webp", nil, "image/webp"},
		{"a.svg", nil, "image/svg+xml"},
		{"diagram.drawio.svg", nil, "image/svg+xml"},
		{"a.bmp", nil, "image/bmp"},
		{"a.ico", nil, "image/x-icon"},
		{"a.avif", nil, "image/avif"},
		{"a.json", nil, "application/json"},
		{"README.md", nil, "text/markdown; charset=utf-8"},
		{"NOTES.MARKDOWN", nil, "text/markdown; charset=utf-8"},
		{"noext", []byte("plain words"), "text/plain; charset=utf-8"},
	}
	for _, tc := range cases {
		if got := files.ContentTypeFor(tc.path, tc.head); got != tc.want {
			t.Errorf("ContentTypeFor(%q) = %q, want %q", tc.path, got, tc.want)
		}
	}
}