package gemlog

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
)

func genBasicAuthHeader(user, password string) string {
	auth := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", user, password)))
	return fmt.Sprintf("Basic %s", auth)
}

func ListGemLogs(config *Config) ([]GemlogListEntry, error) {
	url := fmt.Sprintf("%s:%d/gemlog/_design/gemlog-cli/_view/list", config.CouchDB.Host, config.CouchDB.Port)
	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return nil, fmt.Errorf("failed to create request: %w", err)
	}

	req.Header.Add("authorization", genBasicAuthHeader(config.CouchDB.User, config.CouchDB.Password))

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("failed to send request: %w", err)
	}
	defer res.Body.Close()

	body, err := io.ReadAll(res.Body)
	if err != nil {
		return nil, fmt.Errorf("failed to read response body: %w", err)
	}

	if res.StatusCode < 200 || res.StatusCode >= 300 {
		return nil, fmt.Errorf("unexpected status code %d: %s", res.StatusCode, string(body))
	}

	// Parse CouchDB response
	var couchResponse struct {
		TotalRows int `json:"total_rows"`
		Offset    int `json:"offset"`
		Rows      []struct {
			ID    string `json:"id"`
			Key   string `json:"key"`
			Value struct {
				Rev string `json:"rev"`
			} `json:"value"`
			Doc GemlogListEntry `json:"doc"`
		} `json:"rows"`
	}

	if err := json.Unmarshal(body, &couchResponse); err != nil {
		return nil, fmt.Errorf("failed to parse response: %w", err)
	}

	// Extract entries from response
	entries := make([]GemlogListEntry, 0, len(couchResponse.Rows))
	for _, row := range couchResponse.Rows {
		entries = append(entries, row.Doc)
	}

	return entries, nil
}

func SaveGemlogEntry(config *Config, entry *GemlogEntry) error {
	url := fmt.Sprintf("%s:%d/gemlog/", config.CouchDB.Host, config.CouchDB.Port)

	// Marshal the entry struct to JSON
	jsonData, err := json.Marshal(entry)
	if err != nil {
		return fmt.Errorf("failed to marshal entry: %w", err)
	}

	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
	if err != nil {
		return fmt.Errorf("failed to create request: %w", err)
	}

	req.Header.Add("authorization", genBasicAuthHeader(config.CouchDB.User, config.CouchDB.Password))
	req.Header.Add("content-type", "application/json")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		return fmt.Errorf("failed to send request: %w", err)
	}
	defer res.Body.Close()

	body, err := io.ReadAll(res.Body)
	if err != nil {
		return fmt.Errorf("failed to read response body: %w", err)
	}

	if res.StatusCode < 200 || res.StatusCode >= 300 {
		return fmt.Errorf("unexpected status code %d: %s", res.StatusCode, string(body))
	}

	// fmt.Println(res)
	// fmt.Println(string(body))

	return nil
}