// Package client provides a client for interacting with the Pokémon TCG database.
package client

import (
	"context"
	"encoding/json"
	"errors"
	"net/http"

	"github.com/kratisto/tcgdex-golang/models"
)

const (
	defaultURL      = "https://api.tcgdex.net/v2/fr"
	defaultLanguage = "en"
)

var (
	ErrNotFound = errors.New("not found")
)

// FilterParams regroupe les paramètres de filtre pour les requêtes de ressources
type FilterParams struct {
	Sort     string
	Page     int
	PageSize int
}

// TCGDexClient is the interface for interacting with the Pokémon TCG database.
type TCGDexClient interface {
	CardsClient
	SeriesClient
	SetsClient
	CategoriesClient
	HPClient
	IllustratorsClient
	RaritiesClient
	RetreatsClient
	TypesClient
	DexIDsClient
	EnergyTypesClient
	RegulationMarksClient
	StagesClient
}

// CategoriesClient is the interface for category-related operations.
type CategoriesClient interface {
	Categories(ctx context.Context) ([]string, error)
	GetCardsByCategory(ctx context.Context, category string, params *FilterParams) ([]models.Card, error)
}

// HPClient is the interface for HP-related operations.
type HPClient interface {
	HPs(ctx context.Context) ([]string, error)
	GetCardsByHP(ctx context.Context, hp string, params *FilterParams) ([]models.Card, error)
}

// IllustratorsClient is the interface for illustrator-related operations.
type IllustratorsClient interface {
	Illustrators(ctx context.Context) ([]string, error)
	GetCardsByIllustrator(ctx context.Context, illustrator string) ([]models.Card, error)
}

// RaritiesClient is the interface for rarity-related operations.
type RaritiesClient interface {
	Rarities(ctx context.Context) ([]string, error)
	GetCardsByRarity(ctx context.Context, rarity string, params *FilterParams) ([]models.Card, error)
}

// RetreatsClient is the interface for retreat-related operations.
type RetreatsClient interface {
	Retreats(ctx context.Context) ([]string, error)
	GetCardsByRetreat(ctx context.Context, retreat string, params *FilterParams) ([]models.Card, error)
}

// TypesClient is the interface for type-related operations.
type TypesClient interface {
	Types(ctx context.Context) ([]string, error)
	GetCardsByType(ctx context.Context, typ string, params *FilterParams) ([]models.Card, error)
}

// DexIDsClient is the interface for dexid-related operations.
type DexIDsClient interface {
	DexIDs(ctx context.Context) ([]int, error)
	GetCardsByDexID(ctx context.Context, dexID int) ([]models.Card, error)
}

// EnergyTypesClient is the interface for energy type-related operations.
type EnergyTypesClient interface {
	EnergyTypes(ctx context.Context) ([]string, error)
	GetCardsByEnergyType(ctx context.Context, energyType string) ([]models.Card, error)
}

// RegulationMarksClient is the interface for regulation mark-related operations.
type RegulationMarksClient interface {
	RegulationMarks(ctx context.Context) ([]string, error)
	GetCardsByRegulationMark(ctx context.Context, regulationMark string) ([]models.Card, error)
}

// StagesClient is the interface for stage-related operations.
type StagesClient interface {
	Stages(ctx context.Context) ([]string, error)
	GetCardsByStage(ctx context.Context, stage string) ([]models.Card, error)
}

// CardsClient is the interface for card-related operations.
type CardsClient interface {
	GetCard(ctx context.Context, id string) (*models.Card, error)
	Cards(ctx context.Context) ([]models.Card, error)
}

// SeriesClient is the interface for series-related operations.
type SeriesClient interface {
	Series(ctx context.Context) ([]models.Serie, error)
	GetSerie(ctx context.Context, seriesID string) (*models.Serie, error)
}

// SetsClient is the interface for set-related operations.
type SetsClient interface {
	Sets(ctx context.Context) ([]models.Set, error)
	GetSet(ctx context.Context, setID string) (*models.Set, error)
	GetCardOfSet(ctx context.Context, setID string, cardID string) (*models.Card, error)
}

type tcgDexClient struct {
	CardsClient
	SeriesClient
	SetsClient

	baseURL    string
	language   string
	httpClient *http.Client
}

// NewClient creates a new TCGDexClient with the default http client.
func NewClient(baseURL string, language string) TCGDexClient {
	return &tcgDexClient{
		baseURL:    baseURL,
		language:   language,
		httpClient: http.DefaultClient,
	}
}

// NewClientWithCustomHTTPClient creates a new TCGDexClient with a custom HTTP client.
// This allows for more control over the HTTP requests, such as setting timeouts or custom headers.
func NewClientWithCustomHTTPClient(url string, language string, client *http.Client) TCGDexClient {
	return &tcgDexClient{
		baseURL:    url,
		language:   language,
		httpClient: client,
	}
}

func doRequest[T any](client *http.Client, request *http.Request) (*T, error) {
	var result T

	resp, err := client.Do(request)
	if err != nil {
		return nil, err
	}

	defer func() {
		err := resp.Body.Close()
		if err != nil {
			panic(err)
		}
	}()

	if resp.StatusCode >= 400 && resp.StatusCode < 500 {
		if resp.StatusCode == http.StatusNotFound {
			return nil, ErrNotFound
		}
		return nil, errors.New(http.StatusText(resp.StatusCode))
	}

	jsonDecoder := json.NewDecoder(resp.Body)

	err = jsonDecoder.Decode(&result)
	if err != nil {
		return nil, err
	}

	return &result, nil
}

func doRequestSlice[T any](client *http.Client, request *http.Request) ([]T, error) {
	var result []T

	resp, err := client.Do(request)
	if err != nil {
		return nil, err
	}

	defer func() {
		err := resp.Body.Close()
		if err != nil {
			panic(err)
		}
	}()

	if resp.StatusCode >= 400 && resp.StatusCode < 500 {
		if resp.StatusCode == http.StatusNotFound {
			return nil, ErrNotFound
		}
		return nil, errors.New(http.StatusText(resp.StatusCode))
	}

	jsonDecoder := json.NewDecoder(resp.Body)

	err = jsonDecoder.Decode(&result)
	if err != nil {
		return nil, err
	}

	return result, nil
}