package parser

import (
	"fmt"

	"github.com/yourname/reddit-scraper/internal/fetcher"
	"github.com/yourname/reddit-scraper/internal/types"
)

// ParseJSONPost converts a fetcher.JSONPost into a normalized types.Post.
// It validates mandatory fields and returns an error if the post should be skipped.
func ParseJSONPost(j fetcher.JSONPost) (types.Post, error) {
	var p types.Post
	if j.ID == "" {
		return p, fmt.Errorf("missing id")
	}
	if j.Subreddit == "" {
		return p, fmt.Errorf("missing subreddit")
	}
	if j.Title == "" {
		return p, fmt.Errorf("missing title")
	}
	if j.CreatedUTC <= 0 {
		return p, fmt.Errorf("invalid created_utc")
	}

	p.ID = j.ID
	p.Subreddit = j.Subreddit
	p.Title = j.Title
	if j.Author == "" {
		p.Author = "[deleted]"
	} else {
		p.Author = j.Author
	}
	p.CreatedUTC = int64(j.CreatedUTC)
	p.Score = j.Score
	p.NumComments = j.NumComments
	p.Content = j.Selftext
	p.URL = j.URL
	p.Permalink = j.Permalink

	return p, nil
}