package main

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

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

type MistralChatCompletionRequest struct {
	Model       string           `json:"model"`
	Messages    []MistralMessage `json:"messages"`
	Temperature float64          `json:"temperature"`
}

type MistralMessage struct {
	Role    string `json:"role"`
	Content string `json:"content"`
}

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

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

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

func init() {
	var ModelInfosList = []ModelInfo{}

	modelInfo := ModelInfo{
		ID:          "open-mistral-7b",
		Name:        "Mistral 7b",
		Icon:        "mistral",
		MaxToken:    32000,
		InputPrice:  0.25 / 1000000,
		OutputPrice: 1.25 / 1000000,
	}
	ModelInfosList = append(ModelInfosList, modelInfo)
	ModelsInfos = append(ModelsInfos, modelInfo)

	modelInfo = ModelInfo{
		ID:          "open-mixtral-8x7b",
		Name:        "Mistral 8x7b",
		Icon:        "mistral",
		MaxToken:    32000,
		InputPrice:  0.7 / 1000000,
		OutputPrice: 0.7 / 1000000,
	}
	ModelInfosList = append(ModelInfosList, modelInfo)
	ModelsInfos = append(ModelsInfos, modelInfo)

	modelInfo = ModelInfo{
		ID:          "open-mixtral-8x22b",
		Name:        "Mistral 8x22b",
		Icon:        "mistral",
		MaxToken:    64000,
		InputPrice:  2.0 / 1000000,
		OutputPrice: 6.0 / 1000000,
	}
	ModelInfosList = append(ModelInfosList, modelInfo)
	ModelsInfos = append(ModelsInfos, modelInfo)

	modelInfo = ModelInfo{
		ID:          "mistral-small-latest",
		Name:        "Mistral Small",
		Icon:        "mistral",
		MaxToken:    32000,
		InputPrice:  1.0 / 1000000,
		OutputPrice: 3.0 / 1000000,
	}
	ModelInfosList = append(ModelInfosList, modelInfo)
	ModelsInfos = append(ModelsInfos, modelInfo)

	modelInfo = ModelInfo{
		ID:          "mistral-medium-latest",
		Name:        "Mistral Medium",
		Icon:        "mistral",
		MaxToken:    32000,
		InputPrice:  2.7 / 1000000,
		OutputPrice: 8.1 / 1000000,
	}
	ModelInfosList = append(ModelInfosList, modelInfo)
	ModelsInfos = append(ModelsInfos, modelInfo)

	modelInfo = ModelInfo{
		ID:          "mistral-large-latest",
		Name:        "Mistral Large",
		Icon:        "mistral",
		MaxToken:    32000,
		InputPrice:  4.0 / 1000000,
		OutputPrice: 12.0 / 1000000,
	}
	ModelInfosList = append(ModelInfosList, modelInfo)
	ModelsInfos = append(ModelsInfos, modelInfo)

	companyInfo := CompanyInfo{
		ID:         "mistral",
		Name:       "Mistral",
		Icon:       "icons/mistral.png",
		ModelInfos: ModelInfosList,
	}
	CompanyInfos = append(CompanyInfos, companyInfo)
}

func addMistralMessage(modelID string, selected bool) edgedb.UUID {
	Messages := getAllMessages()

	chatCompletion, err := RequestMistral(modelID, Messages, 0.7)
	if err != nil {
		fmt.Println("Error:", err)
	} else if len(chatCompletion.Choices) == 0 {
		fmt.Println(chatCompletion)
		fmt.Println("No response from Mistral")
		id := insertBotMessage("No response from Mistral", selected, modelID)
		return id
	} else {
		Content := chatCompletion.Choices[0].Message.Content
		id := insertBotMessage(Content, selected, modelID)
		return id
	}
	return edgedb.UUID{}
}

func EdgeMessages2MistralMessages(messages []Message) []MistralMessage {
	mistralMessages := make([]MistralMessage, len(messages))
	for i, msg := range messages {
		var role string
		switch msg.Role {
		case "user":
			role = "user"
		case "bot":
			role = "assistant"
		default:
			role = "system"
		}
		mistralMessages[i] = MistralMessage{
			Role:    role,
			Content: msg.Content,
		}
	}
	return mistralMessages
}

func TestMistralKey(apiKey string) bool {
	url := "https://api.mistral.ai/v1/chat/completions"

	// Convert messages to Mistral format
	mistralMessages := []MistralMessage{
		{
			Role:    "user",
			Content: "Hello",
		},
	}

	requestBody := MistralChatCompletionRequest{
		Model:       "open-mistral-7b",
		Messages:    mistralMessages,
		Temperature: 0,
	}

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

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

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

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

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

	var chatCompletionResponse MistralChatCompletionResponse
	err = json.Unmarshal(body, &chatCompletionResponse)
	fmt.Println(chatCompletionResponse)
	if err != nil {
		fmt.Println("Error:", err)
		return false
	}
	if chatCompletionResponse.Usage.CompletionTokens == 0 {
		fmt.Println("Error: No response from Mistral")
		return false
	}
	return true
}

func RequestMistral(model string, messages []Message, temperature float64) (MistralChatCompletionResponse, error) {
	var apiKey string
	err := edgeClient.QuerySingle(edgeCtx, `
		with
			filtered_keys := (
				select Key {
					key
				} filter .company = <str>$0
			)
		select filtered_keys.key limit 1
	`, &apiKey, "mistral")
	if err != nil {
		return MistralChatCompletionResponse{}, fmt.Errorf("error getting OpenAI API key: %w", err)
	}

	url := "https://api.mistral.ai/v1/chat/completions"

	// Convert messages to OpenAI format
	mistralMessages := EdgeMessages2MistralMessages(messages)

	requestBody := MistralChatCompletionRequest{
		Model:       model,
		Messages:    mistralMessages,
		Temperature: temperature,
	}

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

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

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

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

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

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

	var usedModelInfo ModelInfo
	for mi := range ModelsInfos {
		if ModelsInfos[mi].ID == model {
			usedModelInfo = ModelsInfos[mi]
		}
	}
	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
}