package main

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

func commandMapb(p *PokedexConfig, a *string) error {
	var baseUrl string
	if p.LocationData.Previous == nil {
		fmt.Println("you're on the first page")
		return nil
	} else {
		baseUrl = *p.LocationData.Previous
	}
	var body []byte
	if resp, exists := p.Cache.Get(baseUrl); exists {
		body = resp
	} else {
		client := &http.Client{}

		resp, err := client.Get(baseUrl)
		if err != nil {
			return fmt.Errorf("could not make request to Pokedex API! Err: %w", err)
		}

		body, err = io.ReadAll(resp.Body)
		defer resp.Body.Close()
		if resp.StatusCode > 299 {
			return fmt.Errorf("request returned non-200 code! Code: %v Body: %v", resp.StatusCode, body)
		}
		if err != nil {
			return fmt.Errorf("could not read request body! Err: %w", err)
		}

		p.Cache.Add(baseUrl, body)
	}
	if err := json.Unmarshal(body, &p.LocationData); err != nil {
		return fmt.Errorf("could not unmarshal response! Err: %w", err)
	}
	for _, location := range p.LocationData.Locations {
		fmt.Println(location["name"])
	}
	return nil
}