package awsserversdk

import (
	"context"
	"fmt"
	"net/http"
	"net/url"
	"strconv"
)

type CatalogService struct{ client *Client }
type PricingService struct{ client *Client }

func (s *CatalogService) ListRegions(ctx context.Context) ([]Region, error) {
	var result struct {
		Items []Region `json:"items"`
	}
	err := s.client.do(ctx, http.MethodGet, "/regions", nil, &result, "")
	return result.Items, err
}
func (s *CatalogService) GetCreateOptions(ctx context.Context, region string) (*CreateOptions, error) {
	var result CreateOptions
	err := s.client.do(ctx, http.MethodGet, "/regions/"+escaped(region)+"/create-options", nil, &result, "")
	return &result, err
}
func (s *CatalogService) ListImages(ctx context.Context, region string, options ListOptions) (*Page[Image], error) {
	var result Page[Image]
	err := s.client.do(ctx, http.MethodGet, catalogPath(region, "images", options), nil, &result, "")
	return &result, err
}
func (s *CatalogService) ListInstanceTypes(ctx context.Context, region string, options ListOptions) (*Page[InstanceType], error) {
	var result Page[InstanceType]
	err := s.client.do(ctx, http.MethodGet, catalogPath(region, "instance-types", options), nil, &result, "")
	return &result, err
}
func (s *CatalogService) ListPlacements(ctx context.Context, region string) ([]Placement, error) {
	var result struct {
		Items []Placement `json:"items"`
	}
	err := s.client.do(ctx, http.MethodGet, "/regions/"+escaped(region)+"/placements", nil, &result, "")
	return result.Items, err
}
func (s *PricingService) EstimateInstance(ctx context.Context, region string, input CreateInstanceRequest) (*PriceEstimate, error) {
	var result PriceEstimate
	err := s.client.do(ctx, http.MethodPost, "/regions/"+escaped(region)+"/price-estimate", input, &result, newID())
	return &result, err
}
func catalogPath(region, resource string, options ListOptions) string {
	values := url.Values{}
	if options.Query != "" {
		values.Set("q", options.Query)
	}
	if options.CategoryID != "" {
		values.Set("category_id", options.CategoryID)
	}
	if options.Limit > 0 {
		values.Set("limit", strconv.Itoa(options.Limit))
	}
	if options.Offset > 0 {
		values.Set("offset", strconv.Itoa(options.Offset))
	}
	path := fmt.Sprintf("/regions/%s/%s", escaped(region), resource)
	if encoded := values.Encode(); encoded != "" {
		path += "?" + encoded
	}
	return path
}