package domain64

import (
	"context"
	"database/sql"
	"fmt"
	"log"
	"slices"
	"sync"

	sqlc "git.jadud.com/grosbeak/internal/domain64/sqlc"
	"github.com/jpillora/go-tld"
)

type Domain64Map struct {
	mu      sync.Mutex
	m       map[string]int
	DB      *sql.DB
	Flushed bool
}

func NewDomain64Map(db *sql.DB) (*Domain64Map, error) {
	d64m := &Domain64Map{}
	d64m.DB = db
	d64m.Flushed = true
	// Init the tables if a DB pointer is passed in.
	return d64m, nil
}

func (d64m *Domain64Map) URLToRFQDN(url *tld.URL) string {
	s := ""
	if url.TLD != "" {
		s += url.TLD
	}
	if url.Domain != "" {
		s += "." + url.Domain
	}
	if url.Subdomain != "" {
		s += "." + url.Subdomain
	}
	s += url.Path
	return s
}

func _get_or_insert_tld(queries *sqlc.Queries, d64 *Domain64, url *tld.URL) error {
	ctx := context.Background()
	tld_id, err := queries.GetTLDId(ctx, url.TLD)
	if err != nil {
		cnt, err := queries.CountTLDs(ctx)
		if err != nil {
			return err
		}
		d64.TLD = cnt + 1
		err = queries.InsertTLD(ctx, sqlc.InsertTLDParams{TldID: d64.TLD, Tld: url.TLD})
		if err != nil {
			return err
		}
	} else {
		d64.TLD = tld_id
	}
	return nil
}

func _get_or_insert_domain(queries *sqlc.Queries, d64 *Domain64, url *tld.URL) error {
	ctx := context.Background()
	domain_id, err := queries.GetDomainId(ctx, sqlc.GetDomainIdParams{TldID: d64.TLD, Domain: url.Domain})
	if err != nil {
		cnt, err := queries.CountDomains(ctx, d64.TLD)
		if err != nil {
			return err
		}
		d64.Domain = cnt + 1
		err = queries.InsertDomain(ctx, sqlc.InsertDomainParams{TldID: d64.TLD, DomainID: d64.Domain, Domain: url.Domain})
		if err != nil {
			return err
		}
	} else {
		d64.Domain = domain_id
	}
	return nil
}

func _get_or_insert_subdomain(queries *sqlc.Queries, d64 *Domain64, url *tld.URL) error {
	ctx := context.Background()
	subdomain_id, err := queries.GetSubdomainId(ctx, sqlc.GetSubdomainIdParams{
		TldID: int64(d64.TLD), DomainID: int64(d64.Domain), Subdomain: url.Subdomain,
	})
	if err != nil {
		if url.Subdomain == "" {
			d64.Subdomain = 0
		} else {
			cnt, err := queries.CountSubdomains(ctx, sqlc.CountSubdomainsParams{TldID: d64.TLD, DomainID: d64.Domain})
			if err != nil {
				return err
			}
			d64.Subdomain = cnt + 1
			err = queries.InsertSubdomain(ctx, sqlc.InsertSubdomainParams{TldID: d64.TLD, DomainID: d64.Domain, SubdomainID: d64.Subdomain, Subdomain: url.Subdomain})
			if err != nil {
				return err
			}
		}
	} else {
		d64.Subdomain = subdomain_id
	}
	return nil
}

func _get_or_insert_path(queries *sqlc.Queries, d64 *Domain64, url *tld.URL) error {
	ctx := context.Background()
	log.Println(url, url.Path)
	path_id, err := queries.GetPathId(ctx, sqlc.GetPathIdParams{
		TldID: d64.TLD, DomainID: d64.Domain, SubdomainID: d64.Subdomain, Path: url.Path,
	})
	if err != nil {
		if url.Path == "/" {
			d64.Path = 0
		} else {
			cnt, err := queries.CountPaths(ctx, sqlc.CountPathsParams{TldID: d64.TLD, DomainID: d64.Domain, SubdomainID: d64.Subdomain})
			if err != nil {
				return err
			}
			d64.Path = cnt + 1
			err = queries.InsertPath(ctx, sqlc.InsertPathParams{TldID: d64.TLD, DomainID: d64.Domain, SubdomainID: d64.Subdomain, PathID: d64.Path, Path: url.Path})
			if err != nil {
				return err
			}
		}
	} else {
		d64.Path = path_id
	}
	return nil
}

// FIXME: This feels like a very convoluted way to maintain the domain names.
// However, I also need to maintain uniqueness. Can I do this in one table?
func (d64m *Domain64Map) URLToDomain64(url *tld.URL) (*Domain64, error) {
	allowed_schemes := []string{"https"}
	if !slices.Contains(allowed_schemes, url.Scheme) {
		return nil, fmt.Errorf("URL scheme must be in %q; given %s", allowed_schemes, url.Scheme)
	}

	d64 := &Domain64{}
	queries := sqlc.New(d64m.DB)
	// These manipulate both the DB and the Domain64 struct
	err := _get_or_insert_tld(queries, d64, url)
	if err != nil {
		return nil, err
	}
	err = _get_or_insert_domain(queries, d64, url)
	if err != nil {
		return nil, err
	}
	err = _get_or_insert_subdomain(queries, d64, url)
	if err != nil {
		return nil, err
	}
	err = _get_or_insert_path(queries, d64, url)
	if err != nil {
		return nil, err
	}
	return d64, nil
}

func NullInt64(i int64) sql.NullInt64 {
	return sql.NullInt64{Int64: i, Valid: true}
}

func NullString(s string) sql.NullString {
	return sql.NullString{String: s, Valid: true}
}