package client

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestListRemoteModelsResolvesEndpointForOpenAIBaseURLShapes(t *testing.T) {
	cases := []struct {
		name        string
		adapterType string
		baseURL     string
		wantPath    string
	}{
		{"openai 裸 host 追加 /v1/models", "openai", "/api", "/api/v1/models"},
		{"openai base 以 /v1 结尾仅追加 /models", "openai", "/v1", "/v1/models"},
		{"openai base 内嵌 /v1/chat/completions 剥离方法段", "openai", "/v1/chat/completions", "/v1/models"},
		{"openai base 内嵌 /v1/responses 剥离方法段", "openai", "/v1/responses", "/v1/models"},
		{"anthropic 裸 host 追加 /v1/models", "anthropic", "/api", "/api/v1/models"},
		{"anthropic base 以 /v1 结尾仅追加 /models", "anthropic", "/v1", "/v1/models"},
		{"openai base 大小写混合时按 /V1 结尾去重", "openai", "/V1", "/V1/models"},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			var gotPath string
			var gotAuth string
			var gotAPIKey string
			server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				gotPath = r.URL.Path
				gotAuth = r.Header.Get("Authorization")
				gotAPIKey = r.Header.Get("x-api-key")
				w.Header().Set("Content-Type", "application/json")
				_ = json.NewEncoder(w).Encode(map[string]any{
					"data": []map[string]any{{"id": "gpt-test"}},
				})
			}))
			defer server.Close()

			baseURL := server.URL + tc.baseURL
			service := &ProxyService{}
			result, err := service.ListRemoteModels(tc.adapterType, baseURL, "sk-test")
			if err != nil {
				t.Fatalf("ListRemoteModels() error = %v", err)
			}
			if gotPath != tc.wantPath {
				t.Fatalf("请求路径 = %s, 期望 %s", gotPath, tc.wantPath)
			}
			if len(result.Models) != 1 || result.Models[0].ID != "gpt-test" {
				t.Fatalf("模型解析结果异常: %+v", result.Models)
			}
			if tc.adapterType == "openai" {
				if gotAuth != "Bearer sk-test" {
					t.Fatalf("openai 期望 Authorization Bearer 头, got %q", gotAuth)
				}
			} else if gotAPIKey != "sk-test" {
				t.Fatalf("anthropic 期望 x-api-key 头, got %q", gotAPIKey)
			}
		})
	}
}

func TestBuildModelsEndpointDefaults(t *testing.T) {
	if got := buildModelsEndpoint("openai", "https://example.com"); got != "https://example.com/v1/models" {
		t.Fatalf("裸 host 解析 = %s", got)
	}
	if got := buildModelsEndpoint("anthropic", "https://example.com/v1/"); got != "https://example.com/v1/models" {
		t.Fatalf("/v1 结尾解析 = %s", got)
	}
	if !strings.HasPrefix(buildModelsEndpoint("openai", "https://example.com/v1"), "https://example.com/v1/") {
		t.Fatalf("/v1 结尾去重后应保留原路径前缀")
	}
}