package store

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

	"plumber/internal/store/sqlc"
)

// Answer is an admin reply to a question.
type Answer struct {
	QuestionID string
	AuthorID   string
	AuthorName string
	Body       string
	CreatedAt  string
	UpdatedAt  string
	db         *sql.DB
}

// NewAnswer returns an Answer bound to db.
func NewAnswer(db *sql.DB) *Answer {
	return &Answer{db: db}
}

// Upsert inserts or updates the answer for QuestionID.
func (a *Answer) Upsert(ctx context.Context) error {
	if a == nil || a.db == nil {
		return fmt.Errorf("answer: no database")
	}
	a.Body = strings.TrimSpace(a.Body)
	now := time.Now().UTC().Format(time.RFC3339)
	if a.CreatedAt == "" {
		a.CreatedAt = now
	}
	a.UpdatedAt = now
	return sqlc.New(a.db).UpsertAnswer(ctx, sqlc.UpsertAnswerParams{
		QuestionID: a.QuestionID,
		AuthorID:   a.AuthorID,
		Body:       a.Body,
		CreatedAt:  a.CreatedAt,
		UpdatedAt:  a.UpdatedAt,
	})
}

func GetAnswer(ctx context.Context, db *sql.DB, questionID string) (*Answer, error) {
	r, err := sqlc.New(db).GetAnswer(ctx, questionID)
	if err != nil {
		return nil, err
	}
	return &Answer{
		QuestionID: r.QuestionID,
		AuthorID:   r.AuthorID,
		AuthorName: r.AuthorName,
		Body:       r.Body,
		CreatedAt:  r.CreatedAt,
		UpdatedAt:  r.UpdatedAt,
		db:         db,
	}, nil
}