package bytedance

import (
	"bytes"
	"context"
	"io"
	"net/http"
	"strings"
	"testing"

	"git.pengzhan.dev/haopengzhan/hireme/internal/crawler/crawlertest"
)

type roundTripFunc func(req *http.Request) *http.Response

func (f roundTripFunc) RoundTrip(req *http.Request) (*http.Response, error) {
	return f(req), nil
}

func TestByteDanceCrawler_DiscoverAndFetch(t *testing.T) {
	mockClient := &http.Client{
		Transport: roundTripFunc(func(r *http.Request) *http.Response {
			if strings.Contains(r.URL.Path, "/search/job/posts") {
				body := `{
					"code": 0,
					"data": {
						"count": 1,
						"job_post_list": [
							{
								"id": "7198234123",
								"title": "Software Engineer - Distributed Storage (Seattle/Bellevue)",
								"city_info": {
									"name": "Bellevue",
									"en_name": "Bellevue, WA"
								}
							}
						]
					}
				}`
				return &http.Response{
					StatusCode: http.StatusOK,
					Body:       io.NopCloser(bytes.NewBufferString(body)),
					Header:     make(http.Header),
				}
			}

			if strings.Contains(r.URL.Path, "/job/posts/7198234123") {
				body := `{
					"code": 0,
					"data": {
						"job_post": {
							"id": "7198234123",
							"title": "Software Engineer - Distributed Storage (Seattle/Bellevue)",
							"description": "<p>Build high-throughput storage engines for TikTok recommendation algorithms.</p>",
							"requirement": "<li>BS/MS/PhD in CS and 3+ years experience with C++/Go.</li>",
							"city_info": {
								"en_name": "Bellevue, WA"
							}
						}
					}
				}`
				return &http.Response{
					StatusCode: http.StatusOK,
					Body:       io.NopCloser(bytes.NewBufferString(body)),
					Header:     make(http.Header),
				}
			}

			return &http.Response{
				StatusCode: http.StatusNotFound,
				Body:       io.NopCloser(bytes.NewBufferString("not found")),
				Header:     make(http.Header),
			}
		}),
	}

	c := NewByteDanceCrawlerWithClient(mockClient)
	if !c.CanHandle("bytedance") || !c.CanHandle("tiktok") {
		t.Errorf("CanHandle should support bytedance and tiktok")
	}

	discovered, err := c.DiscoverJobs(context.Background(), "https://jobs.bytedance.com/api/v1/search/job/posts?keyword=Software+Engineer")
	if err != nil {
		t.Fatalf("DiscoverJobs failed: %v", err)
	}

	if len(discovered) != 1 {
		t.Fatalf("expected 1 discovered job, got %d", len(discovered))
	}

	if discovered[0].CanonicalID != "bytedance:7198234123" {
		t.Errorf("unexpected canonical ID: %s", discovered[0].CanonicalID)
	}

	extracted, err := c.FetchJobDetail(context.Background(), "https://jobs.bytedance.com/en/position/7198234123/detail")
	if err != nil {
		t.Fatalf("FetchJobDetail failed: %v", err)
	}

	if extracted.Title != "Software Engineer - Distributed Storage (Seattle/Bellevue)" {
		t.Errorf("unexpected title: %s", extracted.Title)
	}
	if extracted.Company != "ByteDance" {
		t.Errorf("unexpected company: %s", extracted.Company)
	}
	if extracted.Location != "Bellevue, WA" {
		t.Errorf("unexpected location: %s", extracted.Location)
	}
}

func TestByteDanceCrawler_LiveIntegration(t *testing.T) {
	crawlertest.RunLiveIntegration(t, crawlertest.LiveTestConfig{
		PlatformName:            "ByteDance",
		Crawler:                 NewByteDanceCrawler(),
		TargetURL:               "https://jobs.bytedance.com/api/v1/search/job/posts?keyword=Software+Engineer",
		ExpectedCanonicalPrefix: "bytedance:",
		ExpectedCompany:         "ByteDance",
	})
}