package deepseek

import (
	"context"
	"encoding/json"
	"io"
	"net/http"
	"strings"
	"testing"
)

func TestCreateChatWithContext(t *testing.T) {
	client := testAPI(func(r *http.Request) (*http.Response, error) {
		if r.URL.Path != "/chat_session/create" {
			t.Errorf("path = %q", r.URL.Path)
		}
		body, err := io.ReadAll(r.Body)
		if err != nil {
			t.Errorf("read body: %v", err)
		}
		if string(body) != `{}` {
			t.Errorf("body = %s, want {}", body)
		}
		return testHTTPResponse(`{"code":0,"data":{"biz_code":0,"biz_data":{"chat_session":{"id":"chat-id","seq_id":7,"model_type":"default"},"ttl_seconds":60}}}`), nil
	})

	got, err := client.CreateChatWithContext(context.Background())
	if err != nil {
		t.Fatalf("CreateChatWithContext() error = %v", err)
	}
	if got.ID != "chat-id" || got.SeqID != 7 || got.ModelType != "default" {
		t.Fatalf("session = %#v", got)
	}
}

func TestDeleteChatWithContext(t *testing.T) {
	tests := []struct {
		name    string
		body    string
		wantErr string
	}{
		{
			name: "success",
			body: `{"code":0,"data":{"biz_code":0,"biz_data":{}}}`,
		},
		{
			name:    "business error",
			body:    `{"code":0,"data":{"biz_code":42,"biz_msg":"delete denied"}}`,
			wantErr: "delete denied (42)",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			responseBody := &trackingReadCloser{Reader: strings.NewReader(tt.body)}
			client := testAPI(func(r *http.Request) (*http.Response, error) {
				if r.Method != http.MethodPost {
					t.Errorf("method = %q, want POST", r.Method)
				}
				if r.URL.Path != "/chat_session/delete" {
					t.Errorf("path = %q, want /chat_session/delete", r.URL.Path)
				}

				var body deleteChatReq
				if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
					t.Errorf("decode request: %v", err)
				}
				if body.ChatSessionID != "chat-id" {
					t.Errorf("chat_session_id = %q, want chat-id", body.ChatSessionID)
				}

				resp := testHTTPResponse("")
				resp.Body = responseBody
				return resp, nil
			})

			err := client.DeleteChatWithContext(context.Background(), "chat-id")
			if tt.wantErr != "" {
				if err == nil || !strings.Contains(err.Error(), tt.wantErr) {
					t.Fatalf("DeleteChatWithContext() error = %v, want containing %q", err, tt.wantErr)
				}
			} else if err != nil {
				t.Fatalf("DeleteChatWithContext() error = %v", err)
			}
			if !responseBody.closed {
				t.Fatal("response body was not closed")
			}
		})
	}
}