package dal

import (
	"context"
	"database/sql"
	_ "embed"
	"errors"
	"fmt"
	_ "github.com/ClickHouse/clickhouse-go"
	_ "github.com/lib/pq"
	"github.com/minio/minio-go/v7"
	"gitea.pena/SQuiz/common/dal/sqlcgen"
	"gitea.pena/SQuiz/common/repository/account"
	"gitea.pena/SQuiz/common/repository/amo"
	"gitea.pena/SQuiz/common/repository/answer"
	"gitea.pena/SQuiz/common/repository/question"
	"gitea.pena/SQuiz/common/repository/quiz"
	"gitea.pena/SQuiz/common/repository/result"
	"gitea.pena/SQuiz/common/repository/statistics"
	"gitea.pena/SQuiz/common/repository/tg"
	"gitea.pena/SQuiz/common/repository/workers"
	"time"
)

var errNextDeclined = errors.New("next is declined")

type DAL struct {
	conn           *sql.DB
	queries        *sqlcgen.Queries
	AccountRepo    *account.AccountRepository
	AnswerRepo     *answer.AnswerRepository
	QuestionRepo   *question.QuestionRepository
	QuizRepo       *quiz.QuizRepository
	ResultRepo     *result.ResultRepository
	WorkerRepo     *workers.WorkerRepository
	StatisticsRepo *statistics.StatisticsRepository
	WorkerAnsRepo  *answer.WorkerAnswerRepository
	TgRepo         *tg.TgRepo
}

func New(ctx context.Context, cred string, minioClient *minio.Client) (*DAL, error) {
	pool, err := sql.Open("postgres", cred)
	if err != nil {
		return nil, err
	}

	timeoutCtx, cancel := context.WithTimeout(ctx, time.Second)
	defer cancel()

	if err := pool.PingContext(timeoutCtx); err != nil {
		return nil, err
	}

	queries := sqlcgen.New(pool)

	accountRepo := account.NewAccountRepository(account.Deps{
		Queries: queries,
		Pool:    pool,
	})

	storerAnswer := &answer.StorerAnswer{}

	if minioClient != nil {
		storerAnswer, err = answer.NewAnswerMinio(ctx, minioClient)
		if err != nil {
			return nil, err
		}
	}

	workerAnsRepo := answer.NewWorkerAnswerRepo(answer.Deps{
		Queries:     queries,
		Pool:        pool,
		AnswerMinio: storerAnswer,
	})

	answerRepo := answer.NewAnswerRepository(answer.Deps{
		Queries: queries,
		Pool:    pool,
	})

	questionRepo := question.NewQuestionRepository(question.Deps{
		Queries: queries,
		Pool:    pool,
	})

	quizRepo := quiz.NewQuizRepository(quiz.Deps{
		Queries: queries,
		Pool:    pool,
	})

	resultRepo := result.NewResultRepository(result.Deps{
		Queries: queries,
		Pool:    pool,
	})

	workerRepo := workers.NewWorkerRepository(workers.Deps{
		Queries: queries,
	})

	statisticsRepo := statistics.NewStatisticsRepo(statistics.Deps{
		Queries: queries,
		Pool:    pool,
	})

	tgRepo := tg.NewTgRepo(tg.Deps{
		Queries: queries,
		Pool:    pool,
	})

	return &DAL{
		conn:           pool,
		queries:        queries,
		AccountRepo:    accountRepo,
		AnswerRepo:     answerRepo,
		QuestionRepo:   questionRepo,
		QuizRepo:       quizRepo,
		ResultRepo:     resultRepo,
		WorkerRepo:     workerRepo,
		StatisticsRepo: statisticsRepo,
		WorkerAnsRepo:  workerAnsRepo,
		TgRepo:         tgRepo,
	}, nil
}

func (d *DAL) Close(ctx context.Context) error {
	err := d.conn.Close()
	if err != nil {
		return err
	}
	return nil
}

type AmoDal struct {
	conn         *sql.DB
	queries      *sqlcgen.Queries
	AmoRepo      *amo.AmoRepository
	QuestionRepo *question.QuestionRepository
	AnswerRepo   *answer.AnswerRepository
	QuizRepo     *quiz.QuizRepository
	AccountRepo  *account.AccountRepository
}

func NewAmoDal(ctx context.Context, cred string) (*AmoDal, error) {
	pool, err := sql.Open("postgres", cred)
	if err != nil {
		return nil, err
	}

	timeoutCtx, cancel := context.WithTimeout(ctx, time.Second)
	defer cancel()

	if err := pool.PingContext(timeoutCtx); err != nil {
		return nil, err
	}

	queries := sqlcgen.New(pool)

	amoRepo := amo.NewAmoRepository(amo.Deps{
		Queries: queries,
		Pool:    pool,
	})

	questionRepo := question.NewQuestionRepository(question.Deps{
		Queries: queries,
		Pool:    pool,
	})

	answerRepo := answer.NewAnswerRepository(answer.Deps{
		Queries: queries,
		Pool:    pool,
	})

	quizRepo := quiz.NewQuizRepository(quiz.Deps{
		Queries: queries,
		Pool:    pool,
	})

	accountRepo := account.NewAccountRepository(account.Deps{
		Queries: queries,
		Pool:    pool,
	})

	return &AmoDal{
		conn:         pool,
		queries:      queries,
		AmoRepo:      amoRepo,
		QuestionRepo: questionRepo,
		AnswerRepo:   answerRepo,
		QuizRepo:     quizRepo,
		AccountRepo:  accountRepo,
	}, nil
}

func (d *AmoDal) Close(ctx context.Context) error {
	err := d.conn.Close()
	if err != nil {
		return err
	}
	return nil
}

type ClickHouseDAL struct {
	conn               *sql.DB
	StatisticClickRepo *statistics.StatisticClick
}

func NewClickHouseDAL(ctx context.Context, cred string) (*ClickHouseDAL, error) {
	conn, err := sql.Open("clickhouse", cred)
	if err != nil {
		return nil, fmt.Errorf("error open database connection: %w", err)
	}

	timeoutCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
	defer cancel()

	if err := conn.PingContext(timeoutCtx); err != nil {
		return nil, fmt.Errorf("error ping database: %w", err)
	}

	statsClickRepo, err := statistics.NewClickStatistic(ctx, statistics.DepsClick{
		Conn: conn,
	})
	if err != nil {
		return nil, err
	}

	return &ClickHouseDAL{
		conn:               conn,
		StatisticClickRepo: statsClickRepo,
	}, nil
}

func (d *ClickHouseDAL) Close(ctx context.Context) error {
	return d.conn.Close()
}