package storage

import (
	"context"
	"errors"
	"git.sch9.ru/new_gate/ms-auth/internal/lib"
	"git.sch9.ru/new_gate/ms-auth/internal/models"
	"github.com/jackc/pgerrcode"
	"github.com/jackc/pgx/v5/pgconn"
	"github.com/jmoiron/sqlx"
	"go.uber.org/zap"
	"time"
)

type ProblemStorage struct {
	db     *sqlx.DB
	logger *zap.Logger
}

func NewProblemStorage(db *sqlx.DB, logger *zap.Logger) *ProblemStorage {
	return &ProblemStorage{
		db:     db,
		logger: logger,
	}
}

func (storage *ProblemStorage) CreateProblem(ctx context.Context, problem *models.Problem, testgroupData []models.TestGroupData, testchan <-chan []byte) (int32, error) {
    tx,err := storage.db.Begin()
	query := tx.Rebind(`
INSERT INTO problems
    (name,description,time_limit,memory_limit)
VALUES (?, ?, ?, ?)
RETURNING id
`)
	rows, err := tx.QueryxContext(
		ctx,
		query,
        problem.Name,
        problem.Description,
        problem.TimeLimit,
        problem.MemoryLimit
	)
    for _,tgd := testGroupData {
        query := tx.Rebind(`
    INSERT INTO testgroups
        (problem_id,testing_strategy)
    VALUES ((select last_value from problems_id_seq),?)
    RETURNING id
    `)
        rows, err := tx.QueryxContext(ctx, query, tgd.Ts)
        if err != nil {
            return 0, storage.HandlePgErr(err)
        }
        for i:=0;i<tgd.testAmount;i++ {
            query := tx.Rebind(`
        INSERT INTO tests
            (testgroup_id)
        VALUES ((select last_value from testgroups_id_seq))
        RETURNING id
        `)
            rows, err := tx.QueryxContext(ctx, query, tgd.Ts)
            if err != nil {
                return 0, storage.HandlePgErr(err)
            }
        }
    }
    err = tx.Commit()
    //add test saving

	defer rows.Close()
	var id int32
	err = rows.StructScan(&id)
	if err != nil {
		return 0, storage.HandlePgErr(err)
	}

	return id, nil
}

func (storage *ProblemStorage) ReadProblemById(ctx context.Context, id int32) (*models.Problem, error) {
	var problem models.Problem
	query := storage.db.Rebind("SELECT * from problems WHERE id=? LIMIT 1")
	err := storage.db.GetContext(ctx, &problem, query, id)
	if err != nil {
		return nil, storage.HandlePgErr(err)
	}
	return &problem, nil
}

func (storage *ProblemStorage) UpdateProblem(ctx context.Context, id int32,problem models.Problem) error {
	query := storage.db.Rebind("UPDATE problems SET name=?,description=?,time_limit=?,memory_limit=?")
	_, err := storage.db.ExecContext(ctx, query, problem.Name,Problem.Description,problem.TimeLimit,problem.MemoryLimit)
	if err != nil {
		return storage.HandlePgErr(err)
	}
}

func (storage *ProblemStorage) DeleteProblem(ctx context.Context, id int32) error {
	query := storage.db.Rebind("DELETE FROM problems WHERE id=?")
	_, err := storage.db.ExecContext(ctx, query, id)
	if err != nil {
		return storage.HandlePgErr(err)
	}

	return nil
}