package cjlookup

import (
	"fmt"
	"strconv"
	"strings"

	query "github.com/tgckpg/golifehk/query"
	utils "github.com/tgckpg/golifehk/utils"
	"golang.org/x/exp/slices"
)

type QueryResult struct {
	Lang  string
	Error error
	Query *query.QueryObject
}

func writeCCharInfo(sb *strings.Builder, cc *CChar) {
	sb.WriteString(getCUHARTSUrlForChar(cc.Face))
	sb.WriteString(" ")
	utils.WriteMDv2Text(sb, cc.JyutPing)
	if cc.YiDukJam != nil {
		sb.WriteString("\n")
		utils.WriteMDv2Text(sb, "異讀: ")
		utils.WriteMDv2Text(sb, strings.Join(*cc.YiDukJam, " "))
	}
	sb.WriteString("\n")
	utils.WriteMDv2Text(sb, "倉: ")
	utils.WriteMDv2Text(sb, cc.CangJie)
	sb.WriteString("\n")
	utils.WriteMDv2Text(sb, "同音字:")

	slices.SortFunc(*cc.TungJamZi, func(a, b *CChar) int {
		switch {
		case a.Face < b.Face:
			return -1
		case a.Face > b.Face:
			return 1
		default:
			return 0
		}
	})

	for i, cchar := range *cc.TungJamZi {
		sb.WriteString(" ")
		utils.WriteMDv2Text(sb, cchar.Face)
		utils.WriteMDv2Text(sb, strconv.Itoa(i+1))
	}
}

func (this QueryResult) Message() (string, error) {

	if this.Error != nil {
		return "", this.Error
	}

	if this.Query == nil {
		panic("Query is nil")
	}

	sb := strings.Builder{}

	q := *this.Query

	argv := *q.SearchTerms
	args := len(argv)

	if len(*q.Results) == 0 {
		terms := make([]string, args, len(*q.SearchTerms))
		for i, term := range *q.SearchTerms {
			terms[i] = term.Org
		}
		return "", fmt.Errorf("Not Found: \"%s\"", strings.Join(terms, "\", \""))
	}

	slices.SortFunc(*q.Results, func(a, b query.ISearchable) int {
		aa := a.(*CJyutPing)
		bb := b.(*CJyutPing)
		switch {
		case aa.Ref.Face < bb.Ref.Face:
			return -1
		case aa.Ref.Face > bb.Ref.Face:
			return 1
		default:
			return 0
		}
	})

	if utils.IsASCIIAlnum(argv[0].Value) {
		if args == 1 {
			for i, entry := range *q.Results {
				cjp := any(entry).(*CJyutPing)
				sb.WriteString(" ")
				utils.WriteMDv2Text(&sb, cjp.Ref.Face)
				utils.WriteMDv2Text(&sb, strconv.Itoa(i+1))
			}
		} else if args == 2 {
			var err error
			x, err := strconv.Atoi(argv[1].Value)
			if err != nil {
				return "", fmt.Errorf("Invalid index: %s", argv[1].Org)
			}
			if 0 < x {
				for i, entry := range *q.Results {
					cjp := any(entry).(*CJyutPing)
					if (i + 1) == x {
						writeCCharInfo(&sb, cjp.Ref)
					}
				}
			}
		}
	} else {
		cjp := any((*q.Results)[0]).(*CFace)
		if args == 1 {
			writeCCharInfo(&sb, cjp.Ref)
		} else if args == 2 {
			var err error
			x, err := strconv.Atoi(argv[1].Value)
			if err != nil {
				return "", fmt.Errorf("Invalid index: %s", argv[1].Org)
			}
			tjz := (*(*cjp.Ref).TungJamZi)[x-1]

			if tjz != nil {
				writeCCharInfo(&sb, tjz)
			}
		}
	}

	return sb.String(), nil
}