#!/usr/bin/env bash
set -Eeuo pipefail

# ============================================================================
# migrate-alliance-boreale-v2.sh
#
# Migration prudente vers une structure canonique du dépôt Alliance Boréale.
#
# Principes :
# - DRY_RUN=1 par défaut
# - ne supprime rien
# - n'écrase rien silencieusement
# - journalise tout
# - évite les auto-déplacements de dossier
#
# Usage :
#   bash migrate-alliance-boreale-v2.sh
#   DRY_RUN=0 bash migrate-alliance-boreale-v2.sh
# ============================================================================

ROOT="${1:-.}"
cd "$ROOT"

DRY_RUN="${DRY_RUN:-1}"
STAMP="$(date +%Y%m%d-%H%M%S)"
LOG_DIR=".migration"
LOG_FILE="${LOG_DIR}/migration-v2-${STAMP}.log"

mkdir -p "$LOG_DIR"

log() {
  echo "[$(date +%H:%M:%S)] $*" | tee -a "$LOG_FILE"
}

run() {
  if [[ "$DRY_RUN" == "1" ]]; then
    log "DRY-RUN: $*"
  else
    log "RUN: $*"
    eval "$@" | tee -a "$LOG_FILE"
  fi
}

exists() {
  [[ -e "$1" ]]
}

ensure_dir() {
  local d="$1"
  [[ -d "$d" ]] || run "mkdir -p \"$d\""
}

safe_mv() {
  local src="$1"
  local dst="$2"

  if [[ ! -e "$src" ]]; then
    log "SKIP: source absente: $src"
    return 0
  fi

  if [[ "$src" == "$dst" ]]; then
    log "SKIP: source et destination identiques: $src"
    return 0
  fi

  ensure_dir "$(dirname "$dst")"

  if [[ -e "$dst" ]]; then
    local backup="${dst}.pre-migration-${STAMP}"
    log "CONFLIT: destination existe: $dst"
    run "mv \"$dst\" \"$backup\""
  fi

  run "mv \"$src\" \"$dst\""
}

safe_mkdir_tree() {
  for d in "$@"; do
    ensure_dir "$d"
  done
}

move_if_exists() {
  local src="$1"
  local dst="$2"
  exists "$src" && safe_mv "$src" "$dst" || log "SKIP: absent: $src"
}

quarantine_if_exists() {
  local src="$1"
  local bucket="$2"
  if exists "$src"; then
    ensure_dir "$bucket"
    safe_mv "$src" "$bucket/$(basename "$src")"
  fi
}

create_readme_if_absent() {
  local path="$1"
  local content="$2"

  if [[ ! -e "$path" ]]; then
    ensure_dir "$(dirname "$path")"
    if [[ "$DRY_RUN" == "1" ]]; then
      log "DRY-RUN: création de $path"
    else
      printf "%s\n" "$content" > "$path"
      log "RUN: création de $path"
    fi
  fi
}

log "Début migration v2"
log "ROOT=$ROOT"
log "DRY_RUN=$DRY_RUN"

# ----------------------------------------------------------------------------
# 1) Créer uniquement les branches structurelles sûres
# ----------------------------------------------------------------------------

log "Création de l’ossature cible"

safe_mkdir_tree \
  docs \
  infrastructure \
  operations \
  archives \
  tooling \
  security \
  docs/decisions \
  docs/diffusion \
  archives/pre-migration \
  archives/legacy-docs \
  archives/obsolete

# Répertoires feuilles qui ne reçoivent pas un mv de dossier entier existant
safe_mkdir_tree \
  docs/decisions/adr \
  docs/rfc \
  docs/diffusion/conferences \
  docs/diffusion/site \
  docs/diffusion/visuels \
  docs/diffusion/recrutement \
  operations/runbooks \
  operations/evidence \
  operations/procedures \
  operations/checklists \
  infrastructure/opentofu \
  infrastructure/cloud-init \
  infrastructure/netbox \
  infrastructure/templates/proxmox

# ----------------------------------------------------------------------------
# 2) Déplacer les blocs racine évidents
# ----------------------------------------------------------------------------

log "Déplacement des blocs racine évidents"

move_if_exists "ansible" "infrastructure/ansible"
move_if_exists "templates" "infrastructure/templates"
move_if_exists "evidence" "operations/evidence"
move_if_exists "configure" "tooling/configure"

# ----------------------------------------------------------------------------
# 3) Réorganiser docs/ par familles
# ----------------------------------------------------------------------------

if exists "docs"; then
  log "Réorganisation de docs/"

  # Dossiers historiques -> familles cibles
  move_if_exists "docs/00-fondements" "docs/fondements"
  move_if_exists "docs/10-architecture" "docs/architecture"
  move_if_exists "docs/40-ecosystemes" "docs/ecosystemes"
  move_if_exists "docs/constitution" "docs/gouvernance"
  move_if_exists "docs/20-rag" "docs/corpus-a-integrer"
  move_if_exists "docs/vieustoq" "archives/legacy-docs/vieustoq"

  # engineering / guides / opération
  move_if_exists "docs/engineering" "docs/guides-engineering"
  move_if_exists "docs/guides" "docs/guides"
  move_if_exists "docs/opération" "operations/procedures"

  # pile opérateur -> recentrage
  move_if_exists "docs/pile opérateur/adr" "docs/decisions/adr"
  move_if_exists "docs/pile opérateur/pol" "docs/politiques"
  move_if_exists "docs/pile opérateur/runbooks" "operations/runbooks"
  move_if_exists "docs/pile opérateur/evidence" "operations/evidence/pile-operateur"
  move_if_exists "docs/pile opérateur/configs" "operations/procedures/pile-operateur-configs"

  # Ce qui reste du dossier "pile opérateur" part en quarantaine s'il existe encore
  quarantine_if_exists "docs/pile opérateur/README.md" "archives/pre-migration/docs-pile-operateur"
  quarantine_if_exists "docs/pile opérateur" "archives/pre-migration"

  # annexes -> corpus à intégrer
  move_if_exists "docs/50-annexes" "docs/corpus-a-integrer-annexes"

  # assets / diffusion
  move_if_exists "docs/assets" "docs/diffusion/visuels/assets"

  # fichiers de diffusion
  move_if_exists "docs/Alliance_Boreale_Conferences.pptx" "docs/diffusion/conferences/Alliance_Boreale_Conferences.pptx"
  move_if_exists "docs/Conference_01_Rideau_ou_Coffre_Fort.pptx" "docs/diffusion/conferences/Conference_01_Rideau_ou_Coffre_Fort.pptx"
  move_if_exists "docs/Conference_02_Colonisation_Numerique.pptx" "docs/diffusion/conferences/Conference_02_Colonisation_Numerique.pptx"
  move_if_exists "docs/2026-02-03 - Présentation d'Alliance Boréale - Rencontres Linux.odp" "docs/diffusion/conferences/2026-02-03-Rencontres-Linux.odp"
  move_if_exists "docs/alliance_boreale_site.html" "docs/diffusion/site/alliance_boreale_site.html"
  move_if_exists "docs/alliance_boreale_recrutement.docx" "docs/diffusion/recrutement/alliance_boreale_recrutement.docx"

  # fichiers racine documentaires à classer proprement
  move_if_exists "docs/00_Etat_Depot_Vivant_v1.md" "docs/gouvernance/00_Etat_Depot_Vivant_v1.md"
  move_if_exists "docs/00_Glossaire_biomimetique_autopoietique_v3.md" "docs/modele-glossaire.md"
  move_if_exists "docs/00_Modele_8_couches_biomimetique_autopoietique_v3.md" "docs/modele-8-couches.md"
  move_if_exists "docs/00_Nomenclature_v4.md" "docs/nomenclature-v4.md"
  move_if_exists "docs/06 - Controles_Conformite_Label_Prestige_par_Couche_v1.0.md" "docs/politiques/06-Controles_Conformite_Label_Prestige_par_Couche_v1.0.md"

  # divers à trier plus tard
  for f in \
    "docs/index.md" \
    "docs/linkedin_post.md" \
    "docs/TODO.md" \
    "docs/TRANSMISSION.md"
  do
    if exists "$f"; then
      move_if_exists "$f" "docs/corpus-a-integrer/$(basename "$f")"
    fi
  done
fi

# ----------------------------------------------------------------------------
# 4) Corriger certaines branches créées implicitement
# ----------------------------------------------------------------------------

log "Consolidation des branches documentaires"

# Si gouvernance n'existe pas encore après déplacement depuis constitution
ensure_dir "docs/gouvernance"
ensure_dir "docs/corpus-a-integrer"
ensure_dir "docs/politiques"

# Si les fichiers modèle ont été déplacés en racine docs, on leur donne une maison
ensure_dir "docs/modele"
move_if_exists "docs/modele-glossaire.md" "docs/modele/00_Glossaire_biomimetique_autopoietique_v3.md"
move_if_exists "docs/modele-8-couches.md" "docs/modele/00_Modele_8_couches_biomimetique_autopoietique_v3.md"
move_if_exists "docs/nomenclature-v4.md" "docs/modele/00_Nomenclature_v4.md"

# Si on a guides-engineering, le ranger sous guides
if exists "docs/guides-engineering"; then
  ensure_dir "docs/guides"
  move_if_exists "docs/guides-engineering" "docs/guides/engineering"
fi

# Si corpus-a-integrer-annexes existe, le ranger sous corpus-a-integrer
if exists "docs/corpus-a-integrer-annexes"; then
  ensure_dir "docs/corpus-a-integrer"
  move_if_exists "docs/corpus-a-integrer-annexes" "docs/corpus-a-integrer/annexes"
fi

# ----------------------------------------------------------------------------
# 5) Doubles probables -> quarantaine prudente
# ----------------------------------------------------------------------------

log "Mise en quarantaine des doublons probables"

ensure_dir "archives/pre-migration/duplicates"

for f in \
  "docs/fondements/00-manifeste.md" \
  "docs/fondements/00 - Manifeste.md" \
  "docs/corpus-a-integrer/03_Cadre_Conformite_Label_Prestige(1).md" \
  "docs/corpus-a-integrer/devis(2).md"
do
  if exists "$f"; then
    move_if_exists "$f" "archives/pre-migration/duplicates/$(basename "$f")"
  fi
done

# ----------------------------------------------------------------------------
# 6) README d’orientation
# ----------------------------------------------------------------------------

create_readme_if_absent "docs/README.md" \
"# Documentation canonique

Ce dossier contient la documentation de référence de l'Alliance Boréale.

Branches principales :
- fondements
- modele
- architecture
- gouvernance
- decisions
- politiques
- ecosystemes
- guides
- corpus-a-integrer
- diffusion
"

create_readme_if_absent "infrastructure/README.md" \
"# Infrastructure

Contient l'implémentation opératoire :
- ansible
- opentofu
- cloud-init
- templates
- netbox
"

create_readme_if_absent "operations/README.md" \
"# Operations

Contient :
- runbooks
- evidence
- procedures
- checklists
"

create_readme_if_absent "archives/README.md" \
"# Archives

Contient :
- legacy
- variantes remplacées
- artefacts déplacés pendant migration
"

# ----------------------------------------------------------------------------
# 7) Rapport final
# ----------------------------------------------------------------------------

log "Migration v2 terminée"
log "Journal: $LOG_FILE"

cat <<EOF

Terminé.

Mode actuel :
  DRY_RUN=${DRY_RUN}

Commande conseillée d'abord :
  DRY_RUN=1 bash $(basename "$0")

Puis exécution réelle :
  DRY_RUN=0 bash $(basename "$0")

Ensuite :
  git status
  find docs infrastructure operations archives -maxdepth 2 -type d | sort

Zones à réviser manuellement :
  - docs/corpus-a-integrer/
  - archives/pre-migration/duplicates/
  - archives/legacy-docs/
EOF