package db

import (
	"context"
	"database/sql"
	"time"
)

type ClaimMessage struct {
	TicketID   int64
	MessageID  string
	LastReupAt time.Time
}

type ClaimMessageRepo struct{ db *sql.DB }

func NewClaimMessageRepo(db *sql.DB) *ClaimMessageRepo { return &ClaimMessageRepo{db: db} }

func (r *ClaimMessageRepo) Upsert(ctx context.Context, ticketID int64, messageID string, at time.Time) error {
	_, err := r.db.ExecContext(ctx, `
		INSERT INTO claim_messages(ticket_id, message_id, last_reup_at) VALUES(?,?,?)
		ON CONFLICT(ticket_id) DO UPDATE SET message_id=excluded.message_id, last_reup_at=excluded.last_reup_at`,
		ticketID, messageID, at.UTC())
	return err
}

func (r *ClaimMessageRepo) Get(ctx context.Context, ticketID int64) (*ClaimMessage, error) {
	var cm ClaimMessage
	err := r.db.QueryRowContext(ctx,
		`SELECT ticket_id, message_id, last_reup_at FROM claim_messages WHERE ticket_id=?`, ticketID,
	).Scan(&cm.TicketID, &cm.MessageID, &cm.LastReupAt)
	if err == sql.ErrNoRows {
		return nil, nil
	}
	return &cm, err
}

func (r *ClaimMessageRepo) Delete(ctx context.Context, ticketID int64) error {
	_, err := r.db.ExecContext(ctx, `DELETE FROM claim_messages WHERE ticket_id=?`, ticketID)
	return err
}

func (r *ClaimMessageRepo) ListAll(ctx context.Context) ([]*ClaimMessage, error) {
	rows, err := r.db.QueryContext(ctx, `SELECT ticket_id, message_id, last_reup_at FROM claim_messages`)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var result []*ClaimMessage
	for rows.Next() {
		var cm ClaimMessage
		if err := rows.Scan(&cm.TicketID, &cm.MessageID, &cm.LastReupAt); err != nil {
			return nil, err
		}
		result = append(result, &cm)
	}
	return result, rows.Err()
}