package db

import (
	"context"
	"database/sql"
	"errors"
	"fmt"
	"time"

	"github.com/jmoiron/sqlx"
	"golang.org/x/sync/errgroup"
)

type World struct {
	ID string

	Title             string
	Description       string
	Version           string
	System            string
	Background        string
	JoinTheme         string
	CoreVersion       string
	SystemVersion     string
	LastPlayed        string
	Playtime          int
	Availability      int
	NextSession       time.Time
	Socket            bool
	Protected         bool
	Exclusive         bool
	PersistentStorage bool
	Locked            bool
	Owned             bool
	HasStorage        bool
	Compatibility     Compatibility
	Relationships     Relationships
	Tags              []string
	Scripts           []string
	Esmodules         []string
	Authors           []*Author
	Media             []*Media
	Styles            []*Style
	Languages         []*Language
	Packs             []*Pack
	PackFolders       []*Folder
}

func (w *World) Query(data *InsertId[string]) {
	data.query = fmt.Sprintf(`
		INSERT INTO world (%[1]s, id, title, description, version, system, background, join_theme,
			core_version, system_version, last_played, playtime, availability, next_session, socket,
			protected, exclusive_, persistent_storage, locked, owned, has_storage)
		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21)
		ON CONFLICT(id) DO UPDATE SET
			%[1]s = EXCLUDED.%[1]s,
			updated_at = datetime('now')
		RETURNING (created_at == updated_at) AS is_inserted`,
		data.fieldName)
}

func (w *World) InsertObjects(tx *sqlx.Tx) error {
	relId := InsertId[string]{id: w.ID, fieldName: "world_id"}
	group, ctx := errgroup.WithContext(context.Background())

	InsertWithCtxParallel(group, ctx, tx, w.Compatibility, relId)
	InsertWithCtxParallel(group, ctx, tx, w.Relationships, relId)

	esModulesRelId := &InsertId[string]{id: w.ID, fieldName: "world_id", tableName: "es_modules"}
	InsertSimpleSliceParallel(group, tx, w.Esmodules, esModulesRelId)
	scriptRelId := &InsertId[string]{id: w.ID, fieldName: "world_id", tableName: "scripts"}
	InsertSimpleSliceParallel(group, tx, w.Scripts, scriptRelId)
	tagsRelId := &InsertId[string]{id: w.ID, fieldName: "world_id", tableName: "tags"}
	InsertSimpleSliceParallel(group, tx, w.Tags, tagsRelId)

	InsertSliceParallel(group, tx, w.Authors, relId)
	InsertSliceParallel(group, tx, w.Media, relId)
	InsertSliceParallel(group, tx, w.Styles, relId)
	InsertSliceParallel(group, tx, w.Languages, relId)
	InsertSliceParallel(group, tx, w.Packs, relId)
	InsertSliceParallel(group, tx, w.PackFolders, relId)

	err := group.Wait()
	if err != nil && !errors.Is(err, sql.ErrNoRows) {
		return err
	}
	return nil
}

func (w *World) Insert(tx *sqlx.Tx, data *InsertId[string]) error {
	if data.query == "" {
		return ErrNoQuery
	}

	args := []any{data.id, w.ID, w.Title, w.Description, w.Version, w.System, w.Background, w.JoinTheme,
		w.CoreVersion, w.SystemVersion, w.LastPlayed, w.Playtime, w.Availability, w.NextSession, w.Socket,
		w.Protected, w.Exclusive, w.PersistentStorage, w.Locked, w.Owned, w.HasStorage}

	var isInserted bool
	err := tx.QueryRowx(data.query, args...).Scan(&isInserted)
	if err != nil {
		return err
	}

	if isInserted {
		return w.InsertObjects(tx)
	}
	return nil
}

func (w *World) InsertCtx(ctx context.Context, tx *sqlx.Tx, data *InsertId[string]) error {
	if data.query == "" {
		return ErrNoQuery
	}

	args := []any{data.id, w.ID, w.Title, w.Description, w.Version, w.System, w.Background, w.JoinTheme,
		w.CoreVersion, w.SystemVersion, w.LastPlayed, w.Playtime, w.Availability, w.NextSession, w.Socket,
		w.Protected, w.Exclusive, w.PersistentStorage, w.Locked, w.Owned, w.HasStorage}

	var isInserted bool
	err := tx.QueryRowxContext(ctx, data.query, args...).Scan(&isInserted)
	if err != nil {
		return err
	}

	if isInserted {
		return w.InsertObjects(tx)
	}
	return nil
}

func GetNotStartedWorlds(db *sqlx.DB) ([]string, error) {
	const query = `
		SELECT id FROM world WHERE game_id IS NULL`

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var worldNames []string
	err := db.SelectContext(ctx, &worldNames, query)
	if err != nil {
		return nil, err
	}
	return worldNames, nil
}

func IsWorldInserted(db *sqlx.DB, worldName string) (bool, error) {
	const query = `
		SELECT EXISTS(SELECT 1 FROM world WHERE id = $1 AND game_id IS NOT NULL)`

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var exist bool
	err := db.GetContext(ctx, &exist, query, worldName)
	if err != nil {
		return false, err
	}
	return exist, nil
}

func GetWorld(db *sqlx.DB, worldName string) (*World, error) {
	const query = `
		SELECT id, title, description, version, system, background, join_theme, core_version, system_version,
			last_played, playtime, availability, next_session, socket, protected, exclusive_, persistent_storage,
			locked, owned, has_storage
		FROM world WHERE id = $1`

	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()

	var world World
	err := db.QueryRowxContext(ctx, query, worldName).Scan(
		&world.ID, &world.Title, &world.Description, &world.Version, &world.System, &world.Background, &world.JoinTheme,
		&world.CoreVersion, &world.SystemVersion, &world.LastPlayed, &world.Playtime, &world.Availability, &world.NextSession,
		&world.Socket, &world.Protected, &world.Exclusive, &world.PersistentStorage, &world.Locked, &world.Owned, &world.HasStorage,
	)
	if err != nil && !errors.Is(err, sql.ErrNoRows) {
		return nil, err
	}
	return &world, nil
}