package models

import (
	"context"
	"database/sql"
	"fmt"
	"screenmark/screenmark/.gen/haystack/haystack/model"
	. "screenmark/screenmark/.gen/haystack/haystack/table"

	. "github.com/go-jet/jet/v2/postgres"

	"github.com/google/uuid"
)

type StackModel struct {
	dbPool *sql.DB
}

type StackWithItems struct {
	model.Stacks

	SchemaItems []model.SchemaItems
}

type ImageWithSchema struct {
	model.ImageStacks

	Items []model.ImageSchemaItems
}

type IDValue struct {
	ID    string `json:"id"`
	Value string `json:"value"`
}

// ========================================
// SELECT for lists
// ========================================

func (m StackModel) List(ctx context.Context, userId uuid.UUID) ([]StackWithItems, error) {
	getStacksWithItems := SELECT(
		Stacks.AllColumns,
		SchemaItems.AllColumns,
	).
		FROM(
			Stacks.
				INNER_JOIN(SchemaItems, SchemaItems.StackID.EQ(Stacks.ID)),
		).
		WHERE(Stacks.UserID.EQ(UUID(userId)))

	lists := []StackWithItems{}
	err := getStacksWithItems.QueryContext(ctx, m.dbPool, &lists)

	return lists, err
}

func (m StackModel) ListItems(ctx context.Context, listID uuid.UUID) ([]ImageWithSchema, error) {
	getListItems := SELECT(
		ImageStacks.AllColumns,
		ImageSchemaItems.AllColumns,
	).
		FROM(
			ImageStacks.
				INNER_JOIN(ImageSchemaItems, ImageSchemaItems.ImageID.EQ(ImageStacks.ImageID)),
		).
		WHERE(ImageStacks.StackID.EQ(UUID(listID)))

	listItems := make([]ImageWithSchema, 0)
	err := getListItems.QueryContext(ctx, m.dbPool, &listItems)

	return listItems, err
}

func (m StackModel) Get(ctx context.Context, listID uuid.UUID) (model.Stacks, error) {
	getStackStmt := Stacks.SELECT(Stacks.AllColumns).WHERE(Stacks.ID.EQ(UUID(listID)))

	stack := model.Stacks{}
	err := getStackStmt.QueryContext(ctx, m.dbPool, &stack)

	return stack, err
}

// ========================================
// INSERT methods
// ========================================

func (m StackModel) Save(ctx context.Context, userID uuid.UUID, name string, description string, status model.Progress) (model.Stacks, error) {
	saveListStmt := Stacks.
		INSERT(Stacks.UserID, Stacks.Name, Stacks.Description, Stacks.Status).
		VALUES(userID, name, description, status).
		RETURNING(Stacks.ID, Stacks.UserID, Stacks.Name, Stacks.Description, Stacks.Status, Stacks.CreatedAt)

	list := model.Stacks{}
	err := saveListStmt.QueryContext(ctx, m.dbPool, &list)

	return list, err
}

func (m StackModel) SaveItems(ctx context.Context, items []model.SchemaItems) error {
	saveItemsStmt := SchemaItems.INSERT(SchemaItems.MutableColumns).MODELS(items)

	_, err := saveItemsStmt.ExecContext(ctx, m.dbPool)

	return err
}

func (m StackModel) SaveImage(ctx context.Context, imageID uuid.UUID, stackID uuid.UUID) (model.ImageStacks, error) {
	saveImageStmt := ImageStacks.
		INSERT(ImageStacks.ImageID, ImageStacks.StackID).
		VALUES(imageID, stackID).
		RETURNING(ImageStacks.AllColumns)

	imageStack := model.ImageStacks{}

	err := saveImageStmt.QueryContext(ctx, m.dbPool, &imageStack)

	return imageStack, err
}

func (m StackModel) SaveSchemaItems(ctx context.Context, imageID uuid.UUID, items []IDValue) error {
	if len(items) == 0 {
		return fmt.Errorf("items cannot be empty")
	}

	saveSchemaItemStmt := ImageSchemaItems.
		INSERT(
			ImageSchemaItems.ImageID,
			ImageSchemaItems.SchemaItemID,
			ImageSchemaItems.Value,
		)

	for _, item := range items {
		saveSchemaItemStmt = saveSchemaItemStmt.VALUES(
			imageID,
			item.ID,
			item.Value,
		)
	}

	_, err := saveSchemaItemStmt.ExecContext(ctx, m.dbPool)

	return err
}

// ========================================
// DELETE methods
// ========================================

func (m StackModel) DeleteImage(ctx context.Context, listID uuid.UUID, imageID uuid.UUID) error {
	deleteImageListStmt := ImageStacks.DELETE().
		WHERE(
			ImageStacks.StackID.EQ(UUID(listID)).
				AND(ImageStacks.ImageID.EQ(UUID(imageID))),
		)

	_, err := deleteImageListStmt.ExecContext(ctx, m.dbPool)

	return err
}

func (m StackModel) Delete(ctx context.Context, listID uuid.UUID, userID uuid.UUID) error {
	deleteStackStmt := Stacks.DELETE().WHERE(Stacks.ID.EQ(UUID(listID)).AND(Stacks.UserID.EQ(UUID(userID))))

	_, err := deleteStackStmt.ExecContext(ctx, m.dbPool)

	return err
}

func NewStackModel(db *sql.DB) StackModel {
	return StackModel{dbPool: db}
}