package s3

import (
	"context"
	"io"
	"mime"
	"net/http"
	"net/url"
	"strconv"
	"strings"
	"testing"
	"time"

	"git.yuntuo.hk/k2safe/go-omni/storage"
	"github.com/minio/minio-go/v7/pkg/credentials"
)

func TestReadOptionsS3AndR2(t *testing.T) {
	for _, r2 := range []bool{false, true} {
		cfg := Config{Endpoint: "files.example", Bucket: "testbucket", Region: "us-east-1", Secure: true, Credentials: credentials.NewStaticV4("fixtureAccess", "fixtureSecret", "")}
		if r2 {
			var err error
			cfg, err = R2Config(strings.Repeat("a", 32), "testbucket", cfg.Credentials)
			if err != nil {
				t.Fatal(err)
			}
		}
		store, err := Open(cfg)
		if err != nil {
			t.Fatal(err)
		}
		for _, options := range []storage.ReadOptions{{}, {Disposition: storage.DispositionInline, FileName: "报告.pdf", ContentType: "application/pdf"}} {
			link, err := store.PresignGetWithOptions(context.Background(), "folder/file.pdf", 30*time.Minute, options)
			if err != nil {
				t.Fatal(err)
			}
			u, _ := url.Parse(link.URL)
			q := u.Query()
			kind, params, err := mime.ParseMediaType(q.Get("response-content-disposition"))
			want := options.Disposition
			if want == "" {
				want = "attachment"
			}
			if err != nil || kind != want || params["filename"] != options.FileName || q.Get("response-content-type") != options.ContentType || q.Get("response-cache-control") != "private, no-store" || q.Get("X-Amz-Signature") == "" {
				t.Fatal("missing response parameters", err)
			}
			if u.Host != cfg.Endpoint || q.Get("X-Amz-Expires") != "1800" {
				t.Fatal("wrong endpoint/TTL")
			}
			start, err := time.Parse("20060102T150405Z", q.Get("X-Amz-Date"))
			if err != nil || !link.ExpiresAt.Equal(start.Add(30*time.Minute)) {
				t.Fatal("expiry drift", err)
			}
		}
		for _, ttl := range []time.Duration{0, time.Hour + time.Nanosecond} {
			if _, err := store.PresignGetWithOptions(context.Background(), "file", ttl, storage.ReadOptions{}); err == nil {
				t.Fatal("invalid TTL")
			}
		}
		if _, err := store.PresignGetWithOptions(context.Background(), "file", time.Minute, storage.ReadOptions{FileName: "x\r\nY: z"}); err == nil {
			t.Fatal("invalid filename")
		}
		ctx, cancel := context.WithCancel(context.Background())
		cancel()
		if _, err := store.PresignGetWithOptions(ctx, "file", time.Minute, storage.ReadOptions{}); err != context.Canceled {
			t.Fatal(err)
		}
	}
}

// Called inside the existing isolated MinIO integration. The actual provider
// verifies signatures and rejects tampered response parameters.
func checkReadOptionsIntegration(t *testing.T, store *Store) {
	t.Helper()
	ctx := context.Background()
	data := "%PDF-1.4\nread-test\n%%EOF"
	_, err := store.Put(ctx, "preview.pdf", strings.NewReader(data), int64(len(data)), "application/pdf")
	if err != nil {
		t.Fatal(err)
	}
	defer store.Delete(ctx, "preview.pdf")
	for _, kind := range []string{storage.DispositionInline, storage.DispositionAttachment} {
		link, err := store.PresignGetWithOptions(ctx, "preview.pdf", 30*time.Minute, storage.ReadOptions{Disposition: kind, FileName: "示例.pdf", ContentType: "application/pdf"})
		if err != nil {
			t.Fatal(err)
		}
		client := &http.Client{Timeout: 5 * time.Second}
		for _, span := range []string{"", "bytes=0-7", "bytes=999-"} {
			req, _ := http.NewRequest("GET", link.URL, nil)
			if span != "" {
				req.Header.Set("Range", span)
			}
			r, err := client.Do(req)
			if err != nil {
				t.Fatal(err)
			}
			body, err := io.ReadAll(r.Body)
			r.Body.Close()
			if err != nil {
				t.Fatal(err)
			}
			want := 200
			if span == "bytes=0-7" {
				want = 206
			}
			if span == "bytes=999-" {
				want = 416
			}
			if r.StatusCode != want {
				t.Fatal("status", r.StatusCode)
			}
			if want == 416 {
				continue
			}
			disposition, params, err := mime.ParseMediaType(r.Header.Get("Content-Disposition"))
			if err != nil || disposition != kind || params["filename"] != "示例.pdf" || r.Header.Get("Content-Type") != "application/pdf" || r.Header.Get("Cache-Control") != "private, no-store" {
				t.Fatal("provider headers", r.Header, err)
			}
			value := data
			if want == 206 {
				value = data[:8]
			}
			if string(body) != value || r.Header.Get("Content-Length") != strconv.Itoa(len(value)) {
				t.Fatal("provider body")
			}
		}
		for _, name := range []string{"response-content-disposition", "response-content-type", "response-cache-control", "X-Amz-Expires"} {
			u, _ := url.Parse(link.URL)
			q := u.Query()
			q.Set(name, "changed")
			if name == "X-Amz-Expires" {
				q.Set(name, "1801")
			}
			u.RawQuery = q.Encode()
			r, err := client.Get(u.String())
			if err != nil {
				t.Fatal(err)
			}
			r.Body.Close()
			if r.StatusCode != 403 {
				t.Fatal("tampered parameter", name, r.StatusCode)
			}
		}
	}
}