package eia

import (
	"context"
	"fmt"
	"net/url"
	"slices"
	"time"

	"github.com/deepmap/oapi-codegen/pkg/securityprovider"
	"github.com/rs/zerolog"

	eiaapi "gitea.libretechconsulting.com/50W/eia-api-go/api"
)

const (
	defaultBaseURL     = "https://api.eia.gov"
	defaultPingTimeout = 10 * time.Second
	defaultLogLevel    = zerolog.DebugLevel
)

// Simple wrapper around generated EIA API client
// that embeds a client with a bearer auth interceptor
// and optional logging middleware
//
// Performs a basic availability check against the API
// when creating a new client, and exposes a Ping() method
// for health / readiness probes
type Client struct {
	ctx                context.Context
	apiKey             string
	healthCheckTimeout time.Duration
	*eiaapi.Client
	*eiaapi.ClientWithResponses
}

type ClientOpts struct {
	Context            context.Context // Base context for requests
	APIKey             string          // API Key [EIA Opendata API v2](https://www.eia.gov/opendata/index.php)
	Logger             *zerolog.Logger // Optional logger, if set is injected into logging middleware
	LogLevel           *zerolog.Level  // Optional log level, default is zerolog.DebugLevel
	BaseURL            *url.URL        // Optional, default is https://api.eia.gov
	HealthCheckTimeout *time.Duration  // Timeout for Ping() function, default is 10s
}

type Facet struct {
	Name string
	Data interface{}
}

func NewFacets(facets ...*Facet) *eiaapi.Facets {
	newFacets := make(map[string]interface{}, len(facets))
	for _, f := range facets {
		for i := 0; ; i++ {
			if _, set := newFacets[fmt.Sprintf("facets[%s][%d]", f.Name, i)]; set {
				continue
			}

			newFacets[fmt.Sprintf("facets[%s][%d]", f.Name, i)] = f.Data
			break
		}
	}
	return &newFacets
}

func NewClient(opts *ClientOpts) (*Client, error) {
	baseURL := defaultBaseURL
	if opts.BaseURL != nil {
		baseURL = opts.BaseURL.String()
	}

	hcTimeout := defaultPingTimeout
	if opts.HealthCheckTimeout != nil && *opts.HealthCheckTimeout > time.Duration(0) {
		hcTimeout = *opts.HealthCheckTimeout
	}

	middlewares := make([]eiaapi.ClientOption, 0, 2)

	// Injects Authorization: Bearer <APIKey> header into
	// outbound API calls
	// basicAuth, err := securityprovider.NewSecurityProviderBearerToken(opts.APIKey)
	// if err != nil {
	// 	return nil, err
	// }
	// middlewares = append(middlewares, eiaapi.WithRequestEditorFn(basicAuth.Intercept))

	// Injects API key as query parameter: ?api_key=<apiKey>
	paramAuth, err := securityprovider.NewSecurityProviderApiKey("query", "api_key", opts.APIKey)
	if err != nil {
		return nil, err
	}
	middlewares = append(middlewares, eiaapi.WithRequestEditorFn(paramAuth.Intercept))

	// Logging middleware, if logger is given
	if opts.Logger != nil {
		logLevel := defaultLogLevel
		if opts.LogLevel != nil {
			logLevel = *opts.LogLevel
		}

		middlewares = append(middlewares,
			eiaapi.WithRequestEditorFn(newLoggingMiddleware(opts.Logger, logLevel)))
	}

	client, err := eiaapi.NewClient(baseURL, slices.Clip(middlewares)...)
	if err != nil {
		return nil, err
	}

	clientWithResponses, err := eiaapi.NewClientWithResponses(baseURL, slices.Clip(middlewares)...)
	if err != nil {
		return nil, err
	}

	return &Client{
		apiKey:              opts.APIKey,
		ctx:                 opts.Context,
		healthCheckTimeout:  hcTimeout,
		Client:              client,
		ClientWithResponses: clientWithResponses,
	}, nil
}