package endpoints

import (
	"encoding/json"
	"fmt"
	"git.dragse.it/anthrove/e621-to-graph/internal/utils"
	"git.dragse.it/anthrove/e621-to-graph/pkg/e621/model"
	"log"
	"net/http"
)

// GetPool retrieves a pool by its ID from the e621 API.
//
// Parameters:
//   - client: An http.Client used to make the API request.
//   - requestContext: The context for the API request, including the host, user agent, username, and API key.
//   - ID: The ID of the pool to retrieve.
//
// Returns:
//   - model.Pool: The retrieved pool.
//   - error: An error, if any, encountered during the API request or response handling.
func GetPool(client http.Client, requestContext model.RequestContext, ID string) (model.Pool, error) {
	// Create a new HTTP GET request to fetch the pool information.
	r, err := http.NewRequest("GET", fmt.Sprintf("%s/pools/%s.json", requestContext.Host, ID), nil)
	if err != nil {
		// Log the error and return an empty Pool struct and the error.
		log.Println(err)
		return model.Pool{}, err
	}

	r.Header.Set("User-Agent", requestContext.UserAgent)
	r.Header.Add("Accept", "application/json")
	r.SetBasicAuth(requestContext.Username, requestContext.APIKey)

	// Send the request using the provided http.Client.
	resp, err := client.Do(r)
	if err != nil {
		// Log the error and return an empty Pool struct and the error.
		log.Println(err)
		return model.Pool{}, err
	}

	// Check if the HTTP response status code indicates success (2xx range).
	if resp.StatusCode < 200 || resp.StatusCode > 300 {
		// If the status code is outside the 2xx range, return an error based on the status code.
		return model.Pool{}, utils.StatusCodesToError(resp.StatusCode)
	}

	// Initialize a Pool struct to store the response data.
	var poolResponse model.Pool

	// Decode the JSON response into the Pool struct.
	err = json.NewDecoder(resp.Body).Decode(&poolResponse)
	if err != nil {
		// Log the error and return an empty Pool struct and the error.
		log.Println(err)
		return model.Pool{}, err
	}

	// Return the pool information and no error (nil).
	return poolResponse, nil
}

// GetPools retrieves a list of pools from the e621 API based on query parameters.
//
// Parameters:
//   - client: An http.Client used to make the API request.
//   - requestContext: The context for the API request, including the host, user agent, username, and API key.
//   - query: A map containing additional query parameters for the API request.
//
// Returns:
//   - []model.Pool: A slice of pools.
//   - error: An error, if any, encountered during the API request or response handling.
func GetPools(client http.Client, requestContext model.RequestContext, query map[string]string) ([]model.Pool, error) {
	// Create a new HTTP GET request.
	r, err := http.NewRequest("GET", fmt.Sprintf("%s/pools.json", requestContext.Host), nil)
	if err != nil {
		log.Print(err)
	}

	// Append query parameters to the request URL.
	q := r.URL.Query()
	for k, v := range query {
		q.Add(k, v)
	}
	r.URL.RawQuery = q.Encode()

	r.Header.Set("User-Agent", requestContext.UserAgent)
	r.Header.Add("Accept", "application/json")
	r.SetBasicAuth(requestContext.Username, requestContext.APIKey)

	// Send the request using the provided http.Client.
	resp, err := client.Do(r)
	if err != nil {
		log.Print(err)
	}

	// Check if the HTTP response status code indicates success (2xx range).
	if resp.StatusCode < 200 || resp.StatusCode > 300 {
		// If the status code is outside the 2xx range, return an error based on the status code.
		return nil, utils.StatusCodesToError(resp.StatusCode)
	}

	// Initialize a slice of Pool struct to store the response data.
	var poolsResponse []model.Pool

	// Decode the JSON response into the slice of Pool structs.
	err = json.NewDecoder(resp.Body).Decode(&poolsResponse)
	if err != nil {
		// Log the error and return an empty slice and the error.
		log.Println(err)
		return nil, err
	}

	// Return the list of pools and no error (nil).
	return poolsResponse, nil
}