// Yes Google do not work because I am in Europe and I can't get an API key...
// I can't dev, I will try using a VPN I guess at least so the features is available for people outside of Europe
package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"

	"github.com/edgedb/edgedb-go"
)

type GoogleRequestMessage struct {
	Role  string       `json:"role"`
	Parts []GooglePart `json:"parts"`
}

type GooglePart struct {
	Text string `json:"text"`
}

type GoogleChatCompletionRequest struct {
	Messages []GoogleRequestMessage `json:"contents"`
}

type GoogleChatCompletionResponse struct {
	ID      string         `json:"id"`
	Object  string         `json:"object"`
	Created int64          `json:"created"`
	Model   string         `json:"model"`
	Usage   GoogleUsage    `json:"usage"`
	Choices []GoogleChoice `json:"choices"`
}

type GoogleUsage struct {
	PromptTokens     int32 `json:"prompt_tokens"`
	CompletionTokens int32 `json:"completion_tokens"`
	TotalTokens      int32 `json:"total_tokens"`
}

type GoogleChoice struct {
	Message      Message `json:"message"`
	FinishReason string  `json:"finish_reason"`
	Index        int     `json:"index"`
}

func addGoogleMessage(llm LLM, selected bool) edgedb.UUID {
	Messages := getAllSelectedMessages()

	chatCompletion, err := RequestGoogle(llm.Model.ModelID, Messages, float64(llm.Temperature), llm.Context)
	if err != nil {
		fmt.Print("Error fetching user profile")
		panic(err)
	} else if len(chatCompletion.Choices) == 0 {
		fmt.Println("No response from Google")
		id := insertBotMessage("No response from Google", selected, llm.ID)
		return id
	} else {
		Content := chatCompletion.Choices[0].Message.Content
		id := insertBotMessage(Content, selected, llm.ID)
		return id
	}
}

func TestGoogleKey(apiKey string) bool {
	url := "https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent?key=" + apiKey

	googlePart := GooglePart{
		Text: "Hello",
	}
	// Convert messages to OpenAI format
	googleMessages := []GoogleRequestMessage{
		{
			Role:  "user",
			Parts: []GooglePart{googlePart},
		},
	}

	requestBody := GoogleChatCompletionRequest{
		Messages: googleMessages,
	}

	jsonBody, err := json.Marshal(requestBody)
	if err != nil {
		return false
	}

	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonBody))
	if err != nil {
		return false
	}

	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		return false
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return false
	}

	var chatCompletionResponse GoogleChatCompletionResponse
	err = json.Unmarshal(body, &chatCompletionResponse)
	if err != nil {
		return false
	}
	if chatCompletionResponse.Usage.CompletionTokens == 0 {
		return false
	}
	return true
}

func RequestGoogle(model string, messages []Message, temperature float64, context string) (OpenaiChatCompletionResponse, error) {
	var apiKey string
	err := edgeClient.QuerySingle(edgeCtx, `
		with
			filtered_keys := (
				select Key {
					key
				} filter .company.name = <str>$0 AND .<keys[is Setting].<setting[is User] = global currentUser
			)
		select filtered_keys.key limit 1
	`, &apiKey, "openai")
	if err != nil {
		return OpenaiChatCompletionResponse{}, fmt.Errorf("error getting OpenAI API key: %w", err)
	}

	url := "https://api.openai.com/v1/chat/completions"

	requestBody := OpenaiChatCompletionRequest{
		Model:       model,
		Messages:    Message2RequestMessage(messages, context),
		Temperature: temperature,
	}

	jsonBody, err := json.Marshal(requestBody)
	if err != nil {
		return OpenaiChatCompletionResponse{}, fmt.Errorf("error marshaling JSON: %w", err)
	}

	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonBody))
	if err != nil {
		return OpenaiChatCompletionResponse{}, fmt.Errorf("error creating request: %w", err)
	}

	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer "+apiKey)

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		return OpenaiChatCompletionResponse{}, fmt.Errorf("error sending request: %w", err)
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return OpenaiChatCompletionResponse{}, fmt.Errorf("error reading response body: %w", err)
	}

	var chatCompletionResponse OpenaiChatCompletionResponse
	err = json.Unmarshal(body, &chatCompletionResponse)
	if err != nil {
		return OpenaiChatCompletionResponse{}, fmt.Errorf("error unmarshaling JSON: %w", err)
	}

	var usedModelInfo ModelInfo
	err = edgeClient.QuerySingle(edgeCtx, `
		SELECT ModelInfo {
			inputPrice,
			outputPrice
		}
		FILTER .modelID = <str>$0
		LIMIT 1
	`, &usedModelInfo, model)
	if err != nil {
		return OpenaiChatCompletionResponse{}, fmt.Errorf("error getting model info: %w", err)
	}

	var inputCost float32 = float32(chatCompletionResponse.Usage.PromptTokens) * usedModelInfo.InputPrice
	var outputCost float32 = float32(chatCompletionResponse.Usage.CompletionTokens) * usedModelInfo.OutputPrice
	addUsage(inputCost, outputCost, chatCompletionResponse.Usage.PromptTokens, chatCompletionResponse.Usage.CompletionTokens, model)

	return chatCompletionResponse, nil
}