package bot

import (
	"context"
	"fmt"
	"math"
	"strings"

	"github.com/bwmarrin/discordgo"
)

func (b *Bot) handleAddKM(ctx context.Context, s *discordgo.Session, i *discordgo.InteractionCreate) {
	if !b.isAdmin(i) {
		respondEphemeral(s, i, "You need the **Manage Server** permission to use this command.")
		return
	}
	opts := i.ApplicationCommandData().Options
	targetUser := opts[0].UserValue(s)
	km := opts[1].FloatValue()

	targetMember, _ := s.GuildMember(i.GuildID, targetUser.ID)
	name := displayName(targetMember, targetUser)

	if err := b.db.AdjustKM(ctx, i.GuildID, targetUser.ID, name, km); err != nil {
		respondEphemeral(s, i, "Error updating KM.")
		return
	}
	verb := "added"
	if km < 0 {
		verb = "removed"
		km = math.Abs(km)
	}
	respondEphemeral(s, i, fmt.Sprintf("✅ %s %.1f km for **%s**.", titleCase(verb), km, name))
}

func (b *Bot) handleRemoveLog(ctx context.Context, s *discordgo.Session, i *discordgo.InteractionCreate) {
	if !b.isAdmin(i) {
		respondEphemeral(s, i, "You need the **Manage Server** permission to use this command.")
		return
	}
	messageID := i.ApplicationCommandData().Options[0].StringValue()
	km, err := b.db.RemoveLog(ctx, messageID)
	if err != nil {
		respondEphemeral(s, i, "Error removing log.")
		return
	}
	if km == 0 {
		respondEphemeral(s, i, "No log found for that message ID.")
		return
	}
	respondEphemeral(s, i, fmt.Sprintf("✅ Removed a **%.1f km** entry.", km))
}

func (b *Bot) handleAudit(ctx context.Context, s *discordgo.Session, i *discordgo.InteractionCreate) {
	if !b.isAdmin(i) {
		respondEphemeral(s, i, "You need the **Manage Server** permission to use this command.")
		return
	}
	target := i.ApplicationCommandData().Options[0].UserValue(s)
	targetMember, _ := s.GuildMember(i.GuildID, target.ID)
	name := displayName(targetMember, target)

	logs, err := b.db.GetUserLogs(ctx, i.GuildID, target.ID, 20)
	if err != nil || len(logs) == 0 {
		respondEphemeral(s, i, fmt.Sprintf("No logs found for **%s**.", name))
		return
	}

	var sb strings.Builder
	sb.WriteString(fmt.Sprintf("## 🔍 Audit: %s (last %d)\n\n", name, len(logs)))
	for _, l := range logs {
		sb.WriteString(fmt.Sprintf("`%s` — **%.1f km** (msg: `%s`)\n",
			l.LoggedAt.Format("02 Jan 15:04"), l.KM, l.MessageID))
	}
	respondEphemeral(s, i, sb.String())
}