import { requireCampaignAccess, stageTwoApiError, stageTwoDatabase, stageTwoUuid } from '~/server/utils/stage-two-supabase'
import { requireStageTwoUser } from '~/server/utils/stage-two-supabase'

export default defineEventHandler(async (event) => {
  try {
    const user = await requireStageTwoUser(event)
    const campaignId = stageTwoUuid(event.context.params?.id ?? '')
    const { owner } = await requireCampaignAccess(campaignId, user.id, true)
    if (!owner) throw createError({ statusCode: 403, statusMessage: 'Only the campaign owner can delete it.' })

    // Delete associated data first to respect relational integrity
    await stageTwoDatabase(`characters?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`rounds?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`game_events?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`dice_rolls?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`player_intents?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`story_summaries?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`memories?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`relationships?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`audit_entries?campaign_id=eq.${campaignId}`, { method: 'DELETE' })

    // Delete linked world record if it has no other campaigns
    const campaigns = await stageTwoDatabase<Array<{ world_id: string }>>(
      `campaigns?select=world_id&id=eq.${campaignId}`,
    )
    const worldId = campaigns[0]?.world_id as string | undefined
    if (worldId) {
      const otherCampaigns = await stageTwoDatabase<Array<{ id: string }>>(
        `campaigns?select=id&world_id=eq.${worldId}&id=neq.${campaignId}`,
      )
      if (!otherCampaigns.length) {
        await stageTwoDatabase(`world_entities?world_id=eq.${worldId}`, { method: 'DELETE' })
        await stageTwoDatabase(`worlds?id=eq.${worldId}`, { method: 'DELETE' })
      }
    }

    await stageTwoDatabase(`campaign_members?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`invites?campaign_id=eq.${campaignId}`, { method: 'DELETE' })
    await stageTwoDatabase(`campaigns?id=eq.${campaignId}`, { method: 'DELETE' })
    return { success: true }
  } catch (error) {
    stageTwoApiError(error)
  }
})