package main

import (
	"grailbench/config"
	"log/slog"
	"os"
	"testing"
)

// TestParserToolDetection tests the parser implementations with mock responses
func TestParserToolDetection(t *testing.T) {
	// Create a logger for testing
	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
	
	// Create a default config for testing
	cfg := config.LoadConfigOrDefault("")

	// Test cases with different response types
	testCases := []struct {
		name           string
		responseJSON   string
		expectedOutput string
		isToolCall     bool
		expectedTool   string
	}{
		{
			name: "RegularTextResponse",
			responseJSON: `{
				"id": "test-id",
				"object": "text_completion",
				"created": 1234567890,
				"model": "deepseek/deepseek-chat-v3-0324:free",
				"choices": [
					{
						"text": "The capital of France is Paris.",
						"index": 0,
						"logprobs": null,
						"finish_reason": "stop"
					}
				],
				"usage": {
					"prompt_tokens": 10,
					"completion_tokens": 5,
					"total_tokens": 15
				}
			}`,
			expectedOutput: "The capital of France is Paris.",
			isToolCall:     false,
		},
		{
			name: "ToolCallResponse",
			responseJSON: `{
				"id": "test-id",
				"object": "chat.completion",
				"created": 1234567890,
				"model": "deepseek/deepseek-chat-v3-0324:free",
				"choices": [
					{
						"index": 0,
						"finish_reason": "tool_calls",
						"message": {
							"role": "assistant",
							"content": null,
							"tool_calls": [
								{
									"id": "call_123",
									"type": "function",
									"function": {
										"name": "get_current_timestamp",
										"arguments": "{}"
									}
								}
							]
						}
					}
				]
			}`,
			expectedOutput: "[TOOL_CALL:get_current_timestamp]",
			isToolCall:     true,
			expectedTool:   "get_current_timestamp",
		},
		{
			name: "RegularMessageResponse",
			responseJSON: `{
				"id": "test-id",
				"object": "chat.completion",
				"created": 1234567890,
				"model": "deepseek/deepseek-chat-v3-0324:free",
				"choices": [
					{
						"index": 0,
						"finish_reason": "stop",
						"message": {
							"role": "assistant",
							"content": "Hello, how can I help you today?"
						}
					}
				]
			}`,
			expectedOutput: "Hello, how can I help you today?",
			isToolCall:     false,
		},
	}

	// Test DeepSeekParser
	t.Run("DeepSeekParser", func(t *testing.T) {
		parser := NewDeepSeekParser(logger, cfg)

		for _, tc := range testCases {
			t.Run(tc.name, func(t *testing.T) {
				result, err := parser.ParseBytes([]byte(tc.responseJSON))
				if err != nil {
					t.Errorf("ParseBytes returned an error: %v", err)
				}

				if result != tc.expectedOutput {
					t.Errorf("Expected %s, got %s", tc.expectedOutput, result)
				}
			})
		}
	})

	// Test OpenRouterParser
	t.Run("OpenRouterParser", func(t *testing.T) {
		// Test RegularTextResponse with completion API
		t.Run("RegularTextResponse", func(t *testing.T) {
			parser := NewOpenRouterParser(logger, cfg)
			parser.useChatAPI = false // Use completion API for this test

			tc := struct {
				name           string
				responseJSON   string
				expectedOutput string
				isToolCall     bool
				expectedTool   string
			}{
				name: "RegularTextResponse",
				responseJSON: `{
					"id": "test-id",
					"object": "text_completion",
					"created": 1234567890,
					"model": "deepseek/deepseek-chat-v3-0324:free",
					"choices": [
						{
							"text": "The capital of France is Paris.",
							"index": 0,
							"logprobs": null,
							"finish_reason": "stop"
						}
					],
					"usage": {
						"prompt_tokens": 10,
						"completion_tokens": 5,
						"total_tokens": 15
					}
				}`,
				expectedOutput: "The capital of France is Paris.",
				isToolCall:     false,
			}

			result, err := parser.ParseBytes([]byte(tc.responseJSON))
			if err != nil {
				t.Errorf("ParseBytes returned an error: %v", err)
			}

			if result != tc.expectedOutput {
				t.Errorf("Expected %s, got %s", tc.expectedOutput, result)
			}
		})

		// Test ToolCallResponse and RegularMessageResponse with chat API
		parser := NewOpenRouterParser(logger, cfg)
		parser.useChatAPI = true // Use chat API for these tests

		for _, tc := range testCases {
			if tc.name == "RegularTextResponse" {
				continue // Skip this one as we tested it above
			}
			t.Run(tc.name, func(t *testing.T) {
				result, err := parser.ParseBytes([]byte(tc.responseJSON))
				if err != nil {
					t.Errorf("ParseBytes returned an error: %v", err)
				}

				if result != tc.expectedOutput {
					t.Errorf("Expected %s, got %s", tc.expectedOutput, result)
				}
			})
		}
	})
}