package crunchyroll

import (
	"regexp"
	"strconv"
)

// ParseBetaSeriesURL tries to extract the season id of the given crunchyroll beta url, pointing to a season.
func ParseBetaSeriesURL(url string) (seasonId string, ok bool) {
	pattern := regexp.MustCompile(`(?m)^https?://(www\.)?beta\.crunchyroll\.com/(\w{2}/)?series/(?P<seasonId>\w+).*`)
	if urlMatch := pattern.FindAllStringSubmatch(url, -1); len(urlMatch) != 0 {
		groups := regexGroups(urlMatch, pattern.SubexpNames()...)
		seasonId = groups["seasonId"]
		ok = true
	}
	return
}

// ParseBetaEpisodeURL tries to extract the episode id of the given crunchyroll beta url, pointing to an episode.
func ParseBetaEpisodeURL(url string) (episodeId string, ok bool) {
	pattern := regexp.MustCompile(`(?m)^https?://(www\.)?beta\.crunchyroll\.com/(\w{2}/)?watch/(?P<episodeId>\w+).*`)
	if urlMatch := pattern.FindAllStringSubmatch(url, -1); len(urlMatch) != 0 {
		groups := regexGroups(urlMatch, pattern.SubexpNames()...)
		episodeId = groups["episodeId"]
		ok = true
	}
	return
}

// ParseVideoURL tries to extract the crunchyroll series / movie name out of the given url.
//
// Deprecated: Crunchyroll classic urls are sometimes not safe to use, use ParseBetaSeriesURL
// if possible since beta url are always safe to use.
// The method will stay in the library until only beta urls are supported by crunchyroll itself.
func ParseVideoURL(url string) (seriesName string, ok bool) {
	pattern := regexp.MustCompile(`(?m)^https?://(www\.)?crunchyroll\.com(/\w{2}(-\w{2})?)?/(?P<series>[^/]+)(/videos)?/?$`)
	if urlMatch := pattern.FindAllStringSubmatch(url, -1); len(urlMatch) != 0 {
		groups := regexGroups(urlMatch, pattern.SubexpNames()...)
		seriesName = groups["series"]

		if seriesName != "" {
			ok = true
		}
	}
	return
}

// ParseEpisodeURL tries to extract the crunchyroll series name, title, episode number and web id out of the given crunchyroll url
// Note that the episode number can be misleading. For example if an episode has the episode number 23.5 (slime isekai)
// the episode number will be 235.
//
// Deprecated: Crunchyroll classic urls are sometimes not safe to use, use ParseBetaEpisodeURL
// if possible since beta url are always safe to use.
// The method will stay in the library until only beta urls are supported by crunchyroll itself.
func ParseEpisodeURL(url string) (seriesName, title string, episodeNumber int, webId int, ok bool) {
	pattern := regexp.MustCompile(`(?m)^https?://(www\.)?crunchyroll\.com(/\w{2}(-\w{2})?)?/(?P<series>[^/]+)/episode-(?P<number>\d+)-(?P<title>.+)-(?P<webId>\d+).*`)
	if urlMatch := pattern.FindAllStringSubmatch(url, -1); len(urlMatch) != 0 {
		groups := regexGroups(urlMatch, pattern.SubexpNames()...)
		seriesName = groups["series"]
		episodeNumber, _ = strconv.Atoi(groups["number"])
		title = groups["title"]
		webId, _ = strconv.Atoi(groups["webId"])

		if seriesName != "" && title != "" && webId != 0 {
			ok = true
		}
	}
	return
}