package api

import (
	"context"
	"fmt"
	"strconv"
	"time"

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

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 stashIDPtrSliceToSlice(v []*models.StashID) []models.StashID {
	ret := make([]models.StashID, len(v))
	for i, vv := range v {
		c := vv
		ret[i] = *c
	}

	return ret
}

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

	tagIDs, err := stringslice.StringSliceToIntSlice(input.TagIds)
	if err != nil {
		return nil, fmt.Errorf("converting tag ids: %w", err)
	}

	// Populate a new performer from the input
	currentTime := time.Now()
	newPerformer := models.Performer{
		Name:           input.Name,
		Disambiguation: translator.string(input.Disambiguation, "disambiguation"),
		URL:            translator.string(input.URL, "url"),
		Gender:         input.Gender,
		Ethnicity:      translator.string(input.Ethnicity, "ethnicity"),
		Country:        translator.string(input.Country, "country"),
		EyeColor:       translator.string(input.EyeColor, "eye_color"),
		Measurements:   translator.string(input.Measurements, "measurements"),
		FakeTits:       translator.string(input.FakeTits, "fake_tits"),
		PenisLength:    input.PenisLength,
		Circumcised:    input.Circumcised,
		CareerLength:   translator.string(input.CareerLength, "career_length"),
		Tattoos:        translator.string(input.Tattoos, "tattoos"),
		Piercings:      translator.string(input.Piercings, "piercings"),
		Twitter:        translator.string(input.Twitter, "twitter"),
		Instagram:      translator.string(input.Instagram, "instagram"),
		Favorite:       translator.bool(input.Favorite, "favorite"),
		Rating:         translator.ratingConversionInt(input.Rating, input.Rating100),
		Details:        translator.string(input.Details, "details"),
		HairColor:      translator.string(input.HairColor, "hair_color"),
		Weight:         input.Weight,
		IgnoreAutoTag:  translator.bool(input.IgnoreAutoTag, "ignore_auto_tag"),
		CreatedAt:      currentTime,
		UpdatedAt:      currentTime,
		TagIDs:         models.NewRelatedIDs(tagIDs),
		StashIDs:       models.NewRelatedStashIDs(stashIDPtrSliceToSlice(input.StashIds)),
	}

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

	// prefer height_cm over height
	if input.HeightCm != nil {
		newPerformer.Height = input.HeightCm
	} else {
		newPerformer.Height, err = translator.intPtrFromString(input.Height, "height")
		if err != nil {
			return nil, fmt.Errorf("converting height: %w", err)
		}
	}

	if input.AliasList != nil {
		newPerformer.Aliases = models.NewRelatedStrings(input.AliasList)
	} else if input.Aliases != nil {
		newPerformer.Aliases = models.NewRelatedStrings(stringslice.FromString(*input.Aliases, ","))
	}

	if err := performer.ValidateDeathDate(nil, input.Birthdate, input.DeathDate); err != nil {
		if err != nil {
			return nil, 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, err
		}
	}

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

		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, plugin.PerformerCreatePost, input, nil)
	return r.getPerformer(ctx, newPerformer.ID)
}

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

	// Populate performer from the input
	translator := changesetTranslator{
		inputMap: getUpdateInputMap(ctx),
	}

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

	// prefer height_cm over height
	if translator.hasField("height_cm") {
		updatedPerformer.Height = translator.optionalInt(input.HeightCm, "height_cm")
	} else if translator.hasField("height") {
		updatedPerformer.Height, err = translator.optionalIntFromString(input.Height, "height")
		if err != nil {
			return nil, err
		}
	}

	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.ratingConversionOptional(input.Rating, input.Rating100)
	updatedPerformer.Details = translator.optionalString(input.Details, "details")
	updatedPerformer.DeathDate, err = translator.optionalDate(input.DeathDate, "death_date")
	if err != nil {
		return nil, fmt.Errorf("converting death date: %w", err)
	}
	updatedPerformer.HairColor = translator.optionalString(input.HairColor, "hair_color")
	updatedPerformer.Weight = translator.optionalInt(input.Weight, "weight")
	updatedPerformer.IgnoreAutoTag = translator.optionalBool(input.IgnoreAutoTag, "ignore_auto_tag")

	if translator.hasField("alias_list") {
		updatedPerformer.Aliases = &models.UpdateStrings{
			Values: input.AliasList,
			Mode:   models.RelationshipUpdateModeSet,
		}
	} else if translator.hasField("aliases") {
		var values []string
		if input.Aliases != nil {
			values = stringslice.FromString(*input.Aliases, ",")
		}
		updatedPerformer.Aliases = &models.UpdateStrings{
			Values: values,
			Mode:   models.RelationshipUpdateModeSet,
		}
	}

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

	// Save the stash_ids
	if translator.hasField("stash_ids") {
		updatedPerformer.StashIDs = &models.UpdateStashIDs{
			StashIDs: stashIDPtrSliceToSlice(input.StashIds),
			Mode:     models.RelationshipUpdateModeSet,
		}
	}

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

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

		// need to get existing performer
		existing, err := qb.Find(ctx, performerID)
		if err != nil {
			return err
		}

		if existing == nil {
			return fmt.Errorf("performer with id %d not found", performerID)
		}

		if err := performer.ValidateDeathDate(existing, input.Birthdate, input.DeathDate); err != nil {
			if 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, plugin.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, err
	}

	// Populate performer from the input
	translator := changesetTranslator{
		inputMap: getUpdateInputMap(ctx),
	}

	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.Birthdate, err = translator.optionalDate(input.Birthdate, "birthdate")
	if err != nil {
		return nil, fmt.Errorf("converting birthdate: %w", err)
	}
	updatedPerformer.Ethnicity = translator.optionalString(input.Ethnicity, "ethnicity")
	updatedPerformer.Country = translator.optionalString(input.Country, "country")
	updatedPerformer.EyeColor = translator.optionalString(input.EyeColor, "eye_color")

	// prefer height_cm over height
	if translator.hasField("height_cm") {
		updatedPerformer.Height = translator.optionalInt(input.HeightCm, "height_cm")
	} else if translator.hasField("height") {
		updatedPerformer.Height, err = translator.optionalIntFromString(input.Height, "height")
		if err != nil {
			return nil, err
		}
	}

	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.ratingConversionOptional(input.Rating, input.Rating100)
	updatedPerformer.Details = translator.optionalString(input.Details, "details")
	updatedPerformer.DeathDate, err = translator.optionalDate(input.DeathDate, "death_date")
	if err != nil {
		return nil, fmt.Errorf("converting death date: %w", err)
	}
	updatedPerformer.HairColor = translator.optionalString(input.HairColor, "hair_color")
	updatedPerformer.Weight = translator.optionalInt(input.Weight, "weight")
	updatedPerformer.IgnoreAutoTag = translator.optionalBool(input.IgnoreAutoTag, "ignore_auto_tag")

	if translator.hasField("alias_list") {
		updatedPerformer.Aliases = &models.UpdateStrings{
			Values: input.AliasList.Values,
			Mode:   input.AliasList.Mode,
		}
	} else if translator.hasField("aliases") {
		var values []string
		if input.Aliases != nil {
			values = stringslice.FromString(*input.Aliases, ",")
		}
		updatedPerformer.Aliases = &models.UpdateStrings{
			Values: values,
			Mode:   models.RelationshipUpdateModeSet,
		}
	}

	if translator.hasField("tag_ids") {
		updatedPerformer.TagIDs, err = translateUpdateIDs(input.TagIds.Ids, input.TagIds.Mode)
		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 {
			// need to get existing performer
			existing, err := qb.Find(ctx, performerID)
			if err != nil {
				return err
			}

			if existing == nil {
				return fmt.Errorf("performer with id %d not found", performerID)
			}

			if err := performer.ValidateDeathDate(existing, input.Birthdate, input.DeathDate); 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, plugin.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, 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, plugin.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, 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, plugin.PerformerDestroyPost, performerIDs, nil)
	}

	return true, nil
}