// internal/session/history.go
package session

import (
	"fmt"
	"strings"
)

// FormatHistory formats prior session entries as a structured block for
// injection into a worker task prompt. Entries matching excludePhase are
// omitted (pass the current phase to avoid circular injection).
func FormatHistory(entries []Entry, excludePhase string) string {
	var filtered []Entry
	for _, e := range entries {
		if e.Phase != excludePhase {
			filtered = append(filtered, e)
		}
	}
	if len(filtered) == 0 {
		return ""
	}

	var b strings.Builder
	b.WriteString("## Session history\n\n")
	for _, e := range filtered {
		b.WriteString(fmt.Sprintf("### Phase: %s\n", e.Phase))
		b.WriteString(fmt.Sprintf("- Skill: %s\n", e.Skill))
		b.WriteString(fmt.Sprintf("- Status: %s\n", e.FinalStatus))
		if e.FilePath != "" {
			b.WriteString(fmt.Sprintf("- File: %s\n", e.FilePath))
		}
		if e.Message != "" {
			b.WriteString(fmt.Sprintf("- Summary: %s\n", e.Message))
		}
		b.WriteString("\n")
	}
	return b.String()
}