package validations

import (
	"context"
	"fmt"
	"sort"

	"github.com/aldinokemal/go-whatsapp-web-multidevice/config"
	domainSend "github.com/aldinokemal/go-whatsapp-web-multidevice/domains/send"
	pkgError "github.com/aldinokemal/go-whatsapp-web-multidevice/pkg/error"
	"github.com/dustin/go-humanize"
	validation "github.com/go-ozzo/ozzo-validation/v4"
	"github.com/go-ozzo/ozzo-validation/v4/is"
)

func ValidateSendMessage(ctx context.Context, request domainSend.MessageRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.Message, validation.Required),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}
	return nil
}

func ValidateSendImage(ctx context.Context, request domainSend.ImageRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	if request.Image == nil && (request.ImageURL == nil || *request.ImageURL == "") {
		return pkgError.ValidationError("either Image or ImageURL must be provided")
	}

	if request.Image != nil {
		availableMimes := map[string]bool{
			"image/jpeg": true,
			"image/jpg":  true,
			"image/png":  true,
		}

		fmt.Println(request.Image.Header.Get("Content-Type"))

		if !availableMimes[request.Image.Header.Get("Content-Type")] {
			return pkgError.ValidationError("your image is not allowed. please use jpg/jpeg/png")
		}
	}

	if request.ImageURL != nil {
		if *request.ImageURL == "" {
			return pkgError.ValidationError("ImageURL cannot be empty")
		}
	}

	return nil
}

func ValidateSendFile(ctx context.Context, request domainSend.FileRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.File, validation.Required),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	if request.File.Size > config.WhatsappSettingMaxFileSize { // 10MB
		maxSizeString := humanize.Bytes(uint64(config.WhatsappSettingMaxFileSize))
		return pkgError.ValidationError(fmt.Sprintf("max file upload is %s, please upload in cloud and send via text if your file is higher than %s", maxSizeString, maxSizeString))
	}

	return nil
}

func ValidateSendVideo(ctx context.Context, request domainSend.VideoRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.Video, validation.Required),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	availableMimes := map[string]bool{
		"video/mp4":        true,
		"video/x-matroska": true,
		"video/avi":        true,
	}

	if !availableMimes[request.Video.Header.Get("Content-Type")] {
		return pkgError.ValidationError("your video type is not allowed. please use mp4/mkv/avi")
	}

	if request.Video.Size > config.WhatsappSettingMaxVideoSize { // 30MB
		maxSizeString := humanize.Bytes(uint64(config.WhatsappSettingMaxVideoSize))
		return pkgError.ValidationError(fmt.Sprintf("max video upload is %s, please upload in cloud and send via text if your file is higher than %s", maxSizeString, maxSizeString))
	}

	return nil
}

func ValidateSendContact(ctx context.Context, request domainSend.ContactRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.ContactPhone, validation.Required),
		validation.Field(&request.ContactName, validation.Required),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	return nil
}

func ValidateSendLink(ctx context.Context, request domainSend.LinkRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.Link, validation.Required, is.URL),
		validation.Field(&request.Caption, validation.Required),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	return nil
}

func ValidateSendLocation(ctx context.Context, request domainSend.LocationRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.Latitude, validation.Required, is.Latitude),
		validation.Field(&request.Longitude, validation.Required, is.Longitude),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	return nil
}

func ValidateSendAudio(ctx context.Context, request domainSend.AudioRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.Audio, validation.Required),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	availableMimes := map[string]bool{
		"audio/aac":      true,
		"audio/amr":      true,
		"audio/flac":     true,
		"audio/m4a":      true,
		"audio/m4r":      true,
		"audio/mp3":      true,
		"audio/mpeg":     true,
		"audio/ogg":      true,
		"audio/wma":      true,
		"audio/x-ms-wma": true,
		"audio/wav":      true,
		"audio/vnd.wav":  true,
		"audio/vnd.wave": true,
		"audio/wave":     true,
		"audio/x-pn-wav": true,
		"audio/x-wav":    true,
	}
	availableMimesStr := ""

	// Sort MIME types for consistent error message order
	mimeKeys := make([]string, 0, len(availableMimes))
	for k := range availableMimes {
		mimeKeys = append(mimeKeys, k)
	}
	sort.Strings(mimeKeys)

	for _, k := range mimeKeys {
		availableMimesStr += k + ","
	}

	if !availableMimes[request.Audio.Header.Get("Content-Type")] {
		return pkgError.ValidationError(fmt.Sprintf("your audio type is not allowed. please use (%s)", availableMimesStr))
	}

	return nil
}

func ValidateSendPoll(ctx context.Context, request domainSend.PollRequest) error {
	// Validate options first to ensure it is not blank before validating MaxAnswer
	if len(request.Options) == 0 {
		return pkgError.ValidationError("options: cannot be blank.")
	}

	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Phone, validation.Required),
		validation.Field(&request.Question, validation.Required),

		validation.Field(&request.Options, validation.Each(validation.Required)),

		validation.Field(&request.MaxAnswer, validation.Required),
		validation.Field(&request.MaxAnswer, validation.Min(1)),
		validation.Field(&request.MaxAnswer, validation.Max(len(request.Options))),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	// validate options should be unique each other
	uniqueOptions := make(map[string]bool)
	for _, option := range request.Options {
		if _, ok := uniqueOptions[option]; ok {
			return pkgError.ValidationError("options should be unique")
		}
		uniqueOptions[option] = true
	}

	return nil
}

func ValidateSendPresence(ctx context.Context, request domainSend.PresenceRequest) error {
	err := validation.ValidateStructWithContext(ctx, &request,
		validation.Field(&request.Type, validation.In("available", "unavailable")),
	)

	if err != nil {
		return pkgError.ValidationError(err.Error())
	}

	return nil
}