package api

import (
	"context"
	"fmt"
	"strconv"

	"github.com/stashapp/stash/pkg/models"
	"github.com/stashapp/stash/pkg/performer"
	"github.com/stashapp/stash/pkg/plugin/hook"
	"github.com/stashapp/stash/pkg/sliceutil/stringslice"
	"github.com/stashapp/stash/pkg/utils"
)

// used to refetch performer after hooks run
func (r *mutationResolver) getPerformer(ctx context.Context, id int) (ret *models.Performer, err error) {
	if err := r.withTxn(ctx, func(ctx context.Context) error {
		ret, err = r.repository.Performer.Find(ctx, id)
		return err
	}); err != nil {
		return nil, err
	}

	return ret, nil
}

func (r *mutationResolver) PerformerCreate(ctx context.Context, input models.PerformerCreateInput) (*models.Performer, error) {
	translator := changesetTranslator{
		inputMap: getUpdateInputMap(ctx),
	}

	// Populate a new performer from the input
	newPerformer := models.NewPerformer()

	newPerformer.Name = input.Name
	newPerformer.Disambiguation = translator.string(input.Disambiguation)
	newPerformer.Aliases = models.NewRelatedStrings(input.AliasList)
	newPerformer.URL = translator.string(input.URL)
	newPerformer.Gender = input.Gender
	newPerformer.Ethnicity = translator.string(input.Ethnicity)
	newPerformer.Country = translator.string(input.Country)
	newPerformer.EyeColor = translator.string(input.EyeColor)
	newPerformer.Measurements = translator.string(input.Measurements)
	newPerformer.FakeTits = translator.string(input.FakeTits)
	newPerformer.PenisLength = input.PenisLength
	newPerformer.Circumcised = input.Circumcised
	newPerformer.CareerLength = translator.string(input.CareerLength)
	newPerformer.Tattoos = translator.string(input.Tattoos)
	newPerformer.Piercings = translator.string(input.Piercings)
	newPerformer.Twitter = translator.string(input.Twitter)
	newPerformer.Instagram = translator.string(input.Instagram)
	newPerformer.Favorite = translator.bool(input.Favorite)
	newPerformer.Rating = input.Rating100
	newPerformer.Details = translator.string(input.Details)
	newPerformer.HairColor = translator.string(input.HairColor)
	newPerformer.Height = input.HeightCm
	newPerformer.Weight = input.Weight
	newPerformer.IgnoreAutoTag = translator.bool(input.IgnoreAutoTag)
	newPerformer.StashIDs = models.NewRelatedStashIDs(input.StashIds)

	var err error

	newPerformer.Birthdate, err = translator.datePtr(input.Birthdate)
	if err != nil {
		return nil, fmt.Errorf("converting birthdate: %w", err)
	}
	newPerformer.DeathDate, err = translator.datePtr(input.DeathDate)
	if err != nil {
		return nil, fmt.Errorf("converting death date: %w", err)
	}

	newPerformer.TagIDs, err = translator.relatedIds(input.TagIds)
	if err != nil {
		return nil, fmt.Errorf("converting tag ids: %w", err)
	}

	// Process the base 64 encoded image string
	var imageData []byte
	if input.Image != nil {
		imageData, err = utils.ProcessImageInput(ctx, *input.Image)
		if err != nil {
			return nil, fmt.Errorf("processing image: %w", err)
		}
	}

	// Start the transaction and save the performer
	if err := r.withTxn(ctx, func(ctx context.Context) error {
		qb := r.repository.Performer

		if err := performer.ValidateCreate(ctx, newPerformer, qb); err != nil {
			return err
		}

		err = qb.Create(ctx, &newPerformer)
		if err != nil {
			return err
		}

		// update image table
		if len(imageData) > 0 {
			if err := qb.UpdateImage(ctx, newPerformer.ID, imageData); err != nil {
				return err
			}
		}

		return nil
	}); err != nil {
		return nil, err
	}

	r.hookExecutor.ExecutePostHooks(ctx, newPerformer.ID, hook.PerformerCreatePost, input, nil)
	return r.getPerformer(ctx, newPerformer.ID)
}

func (r *mutationResolver) PerformerUpdate(ctx context.Context, input models.PerformerUpdateInput) (*models.Performer, error) {
	performerID, err := strconv.Atoi(input.ID)
	if err != nil {
		return nil, fmt.Errorf("converting id: %w", err)
	}

	translator := changesetTranslator{
		inputMap: getUpdateInputMap(ctx),
	}

	// Populate performer from the input
	updatedPerformer := models.NewPerformerPartial()

	updatedPerformer.Name = translator.optionalString(input.Name, "name")
	updatedPerformer.Disambiguation = translator.optionalString(input.Disambiguation, "disambiguation")
	updatedPerformer.URL = translator.optionalString(input.URL, "url")
	updatedPerformer.Gender = translator.optionalString((*string)(input.Gender), "gender")
	updatedPerformer.Ethnicity = translator.optionalString(input.Ethnicity, "ethnicity")
	updatedPerformer.Country = translator.optionalString(input.Country, "country")
	updatedPerformer.EyeColor = translator.optionalString(input.EyeColor, "eye_color")
	updatedPerformer.Measurements = translator.optionalString(input.Measurements, "measurements")
	updatedPerformer.FakeTits = translator.optionalString(input.FakeTits, "fake_tits")
	updatedPerformer.PenisLength = translator.optionalFloat64(input.PenisLength, "penis_length")
	updatedPerformer.Circumcised = translator.optionalString((*string)(input.Circumcised), "circumcised")
	updatedPerformer.CareerLength = translator.optionalString(input.CareerLength, "career_length")
	updatedPerformer.Tattoos = translator.optionalString(input.Tattoos, "tattoos")
	updatedPerformer.Piercings = translator.optionalString(input.Piercings, "piercings")
	updatedPerformer.Twitter = translator.optionalString(input.Twitter, "twitter")
	updatedPerformer.Instagram = translator.optionalString(input.Instagram, "instagram")
	updatedPerformer.Favorite = translator.optionalBool(input.Favorite, "favorite")
	updatedPerformer.Rating = translator.optionalInt(input.Rating100, "rating100")
	updatedPerformer.Details = translator.optionalString(input.Details, "details")
	updatedPerformer.HairColor = translator.optionalString(input.HairColor, "hair_color")
	updatedPerformer.Weight = translator.optionalInt(input.Weight, "weight")
	updatedPerformer.IgnoreAutoTag = translator.optionalBool(input.IgnoreAutoTag, "ignore_auto_tag")
	updatedPerformer.StashIDs = translator.updateStashIDs(input.StashIds, "stash_ids")

	updatedPerformer.Birthdate, err = translator.optionalDate(input.Birthdate, "birthdate")
	if err != nil {
		return nil, fmt.Errorf("converting birthdate: %w", err)
	}
	updatedPerformer.DeathDate, err = translator.optionalDate(input.DeathDate, "death_date")
	if err != nil {
		return nil, fmt.Errorf("converting death date: %w", err)
	}

	// prefer height_cm over height
	if translator.hasField("height_cm") {
		updatedPerformer.Height = translator.optionalInt(input.HeightCm, "height_cm")
	}

	// prefer alias_list over aliases
	if translator.hasField("alias_list") {
		updatedPerformer.Aliases = translator.updateStrings(input.AliasList, "alias_list")
	}

	updatedPerformer.TagIDs, err = translator.updateIds(input.TagIds, "tag_ids")
	if err != nil {
		return nil, fmt.Errorf("converting tag ids: %w", err)
	}

	var imageData []byte
	imageIncluded := translator.hasField("image")
	if input.Image != nil {
		imageData, err = utils.ProcessImageInput(ctx, *input.Image)
		if err != nil {
			return nil, fmt.Errorf("processing image: %w", err)
		}
	}

	// Start the transaction and save the performer
	if err := r.withTxn(ctx, func(ctx context.Context) error {
		qb := r.repository.Performer

		if err := performer.ValidateUpdate(ctx, performerID, updatedPerformer, qb); err != nil {
			return err
		}

		_, err = qb.UpdatePartial(ctx, performerID, updatedPerformer)
		if err != nil {
			return err
		}

		// update image table
		if imageIncluded {
			if err := qb.UpdateImage(ctx, performerID, imageData); err != nil {
				return err
			}
		}

		return nil
	}); err != nil {
		return nil, err
	}

	r.hookExecutor.ExecutePostHooks(ctx, performerID, hook.PerformerUpdatePost, input, translator.getFields())
	return r.getPerformer(ctx, performerID)
}

func (r *mutationResolver) BulkPerformerUpdate(ctx context.Context, input BulkPerformerUpdateInput) ([]*models.Performer, error) {
	performerIDs, err := stringslice.StringSliceToIntSlice(input.Ids)
	if err != nil {
		return nil, fmt.Errorf("converting ids: %w", err)
	}

	translator := changesetTranslator{
		inputMap: getUpdateInputMap(ctx),
	}

	// Populate performer from the input
	updatedPerformer := models.NewPerformerPartial()

	updatedPerformer.Disambiguation = translator.optionalString(input.Disambiguation, "disambiguation")
	updatedPerformer.URL = translator.optionalString(input.URL, "url")
	updatedPerformer.Gender = translator.optionalString((*string)(input.Gender), "gender")
	updatedPerformer.Ethnicity = translator.optionalString(input.Ethnicity, "ethnicity")
	updatedPerformer.Country = translator.optionalString(input.Country, "country")
	updatedPerformer.EyeColor = translator.optionalString(input.EyeColor, "eye_color")
	updatedPerformer.Measurements = translator.optionalString(input.Measurements, "measurements")
	updatedPerformer.FakeTits = translator.optionalString(input.FakeTits, "fake_tits")
	updatedPerformer.PenisLength = translator.optionalFloat64(input.PenisLength, "penis_length")
	updatedPerformer.Circumcised = translator.optionalString((*string)(input.Circumcised), "circumcised")
	updatedPerformer.CareerLength = translator.optionalString(input.CareerLength, "career_length")
	updatedPerformer.Tattoos = translator.optionalString(input.Tattoos, "tattoos")
	updatedPerformer.Piercings = translator.optionalString(input.Piercings, "piercings")
	updatedPerformer.Twitter = translator.optionalString(input.Twitter, "twitter")
	updatedPerformer.Instagram = translator.optionalString(input.Instagram, "instagram")
	updatedPerformer.Favorite = translator.optionalBool(input.Favorite, "favorite")
	updatedPerformer.Rating = translator.optionalInt(input.Rating100, "rating100")
	updatedPerformer.Details = translator.optionalString(input.Details, "details")
	updatedPerformer.HairColor = translator.optionalString(input.HairColor, "hair_color")
	updatedPerformer.Weight = translator.optionalInt(input.Weight, "weight")
	updatedPerformer.IgnoreAutoTag = translator.optionalBool(input.IgnoreAutoTag, "ignore_auto_tag")

	updatedPerformer.Birthdate, err = translator.optionalDate(input.Birthdate, "birthdate")
	if err != nil {
		return nil, fmt.Errorf("converting birthdate: %w", err)
	}
	updatedPerformer.DeathDate, err = translator.optionalDate(input.DeathDate, "death_date")
	if err != nil {
		return nil, fmt.Errorf("converting death date: %w", err)
	}

	// prefer height_cm over height
	if translator.hasField("height_cm") {
		updatedPerformer.Height = translator.optionalInt(input.HeightCm, "height_cm")
	}

	// prefer alias_list over aliases
	if translator.hasField("alias_list") {
		updatedPerformer.Aliases = translator.updateStringsBulk(input.AliasList, "alias_list")
	}

	updatedPerformer.TagIDs, err = translator.updateIdsBulk(input.TagIds, "tag_ids")
	if err != nil {
		return nil, fmt.Errorf("converting tag ids: %w", err)
	}

	ret := []*models.Performer{}

	// Start the transaction and save the performers
	if err := r.withTxn(ctx, func(ctx context.Context) error {
		qb := r.repository.Performer

		for _, performerID := range performerIDs {
			if err := performer.ValidateUpdate(ctx, performerID, updatedPerformer, qb); err != nil {
				return err
			}

			performer, err := qb.UpdatePartial(ctx, performerID, updatedPerformer)
			if err != nil {
				return err
			}

			ret = append(ret, performer)
		}

		return nil
	}); err != nil {
		return nil, err
	}

	// execute post hooks outside of txn
	var newRet []*models.Performer
	for _, performer := range ret {
		r.hookExecutor.ExecutePostHooks(ctx, performer.ID, hook.PerformerUpdatePost, input, translator.getFields())

		performer, err = r.getPerformer(ctx, performer.ID)
		if err != nil {
			return nil, err
		}

		newRet = append(newRet, performer)
	}

	return newRet, nil
}

func (r *mutationResolver) PerformerDestroy(ctx context.Context, input PerformerDestroyInput) (bool, error) {
	id, err := strconv.Atoi(input.ID)
	if err != nil {
		return false, fmt.Errorf("converting id: %w", err)
	}

	if err := r.withTxn(ctx, func(ctx context.Context) error {
		return r.repository.Performer.Destroy(ctx, id)
	}); err != nil {
		return false, err
	}

	r.hookExecutor.ExecutePostHooks(ctx, id, hook.PerformerDestroyPost, input, nil)

	return true, nil
}

func (r *mutationResolver) PerformersDestroy(ctx context.Context, performerIDs []string) (bool, error) {
	ids, err := stringslice.StringSliceToIntSlice(performerIDs)
	if err != nil {
		return false, fmt.Errorf("converting ids: %w", err)
	}

	if err := r.withTxn(ctx, func(ctx context.Context) error {
		qb := r.repository.Performer
		for _, id := range ids {
			if err := qb.Destroy(ctx, id); err != nil {
				return err
			}
		}

		return nil
	}); err != nil {
		return false, err
	}

	for _, id := range ids {
		r.hookExecutor.ExecutePostHooks(ctx, id, hook.PerformerDestroyPost, performerIDs, nil)
	}

	return true, nil
}