package web

import (
	"html/template"
	"strings"
)

// runToken returns the full user-facing proquint when an ID is numeric.
// Non-numeric legacy IDs remain usable by the CLI unchanged.
func runToken(value any) string {
	view := commandRunView(value)
	if view.Pronounce != "" {
		return view.Pronounce
	}
	return view.RunID
}

func runDisplay(value any) string {
	view := commandRunView(value)
	if view.PronounceShort != "" {
		return view.PronounceShort
	}
	return runToken(view)
}

func commandRunView(value any) runView {
	switch current := value.(type) {
	case runView:
		return current
	case childPage:
		return current.runView
	}
	return runView{}
}

// nuQuote renders one Nushell raw-string argument.
// Increasing hash delimiters preserves every byte, including apostrophes,
// interpolation syntax, newlines, and strings beginning with a flag.
func nuQuote(value string) string {
	if value != "" {
		safe := true
		for _, r := range value {
			if !((r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z') || (r >= '0' && r <= '9') || strings.ContainsRune("_+-.,/:=@%", r)) {
				safe = false
				break
			}
		}
		if safe {
			return value
		}
	}
	for hashes := 1; ; hashes++ {
		delimiter := "'" + strings.Repeat("#", hashes)
		if !strings.Contains(value, delimiter) {
			return "r" + strings.Repeat("#", hashes) + "'" + value + delimiter
		}
	}
}

func commandText(parts ...string) string {
	quoted := make([]string, len(parts))
	for i, part := range parts {
		quoted[i] = nuQuote(part)
	}
	return strings.Join(quoted, " ")
}

// highlightCommand safely styles a preview while leaving each argument intact.
func highlightCommand(parts ...string) template.HTML {
	var b strings.Builder
	for i, part := range parts {
		if i > 0 {
			b.WriteByte(' ')
		}
		class := "command-arg"
		if i == 0 || i == 1 {
			class = "command-name"
		} else if strings.HasPrefix(part, "-") {
			class = "command-flag"
		}
		b.WriteString(`<span class="` + class + `">`)
		b.WriteString(template.HTMLEscapeString(nuQuote(part)))
		b.WriteString(`</span>`)
	}
	return template.HTML(b.String())
}