#!/usr/bin/env bash
# install.sh — Installeur interactif de skills IA
# Dépôt : https://gitea.maison43.duckdns.org/gilles/mes_skills
set -euo pipefail

# ── Couleurs Gruvbox Dark 256 ──────────────────────────────────────
GRV_FG='\033[38;5;223m'
GRV_RED='\033[38;5;167m'
GRV_GREEN='\033[38;5;142m'
GRV_YELLOW='\033[38;5;214m'
GRV_BLUE='\033[38;5;109m'
GRV_PURPLE='\033[38;5;175m'
GRV_AQUA='\033[38;5;108m'
GRV_ORANGE='\033[38;5;208m'
GRV_GRAY='\033[38;5;245m'
RESET='\033[0m'

# ── Thème fzf Gruvbox Dark ────────────────────────────────────────
export FZF_DEFAULT_OPTS="
  --color=bg+:#3c3836,bg:#282828,spinner:#fb4934,hl:#928374
  --color=fg:#ebdbb2,header:#928374,info:#8ec07c,pointer:#fb4934
  --color=marker:#fb4934,fg+:#ebdbb2,prompt:#fb4934,hl+:#fb4934
  --border=rounded --height=80% --layout=reverse
  --header-lines=2
"

# ── Icônes ────────────────────────────────────────────────────────
ICO_OK="✓"
ICO_UPD="↑"
ICO_NEW="+"
ICO_NA="·"
ICO_LOCAL="●L"
ICO_GLOBAL="●G"
ICO_SKIP="○"

# ── Configuration ─────────────────────────────────────────────────
REPO_URL="https://gitea.maison43.duckdns.org/gilles/mes_skills.git"
REPO_DIR="/tmp/mes_skills_$$"
STATE_FILE="/tmp/skills_state_$$"

SKILLS_DEBUG="${SKILLS_DEBUG:-0}"
SKILLS_DRY_RUN="${SKILLS_DRY_RUN:-0}"
SKILLS_REPO="${SKILLS_REPO:-}"
SKILLS_TAG="${SKILLS_TAG:-}"
SKILLS_AGENT="${SKILLS_AGENT:-}"

# ── Helpers couleur ───────────────────────────────────────────────
ok()     { echo -e "${GRV_GREEN}${ICO_OK}  $*${RESET}"; }
err()    { echo -e "${GRV_RED}✗  $*${RESET}" >&2; }
info()   { echo -e "${GRV_BLUE}→  $*${RESET}"; }
warn()   { echo -e "${GRV_ORANGE}⚠  $*${RESET}"; }
debug()  { [[ "$SKILLS_DEBUG" == "1" ]] && echo -e "${GRV_GRAY}[DBG] $*${RESET}" || true; }
header() { echo -e "\n${GRV_PURPLE}╔══ $* ══╗${RESET}\n"; }

# ── Nettoyage automatique ─────────────────────────────────────────
cleanup() {
    debug "Nettoyage $REPO_DIR et $STATE_FILE"
    [[ -d "$REPO_DIR" ]] && rm -rf "$REPO_DIR"
    [[ -f "$STATE_FILE" ]] && rm -f "$STATE_FILE"
}
trap cleanup EXIT

# ── Installation fzf ──────────────────────────────────────────────
_install_fzf_binary() {
    local fzf_url="https://github.com/junegunn/fzf/releases/latest/download/fzf-linux_amd64.tar.gz"
    local tmp_fzf="/tmp/fzf_$$.tar.gz"
    info "Téléchargement fzf depuis GitHub Releases..."
    curl -fsSL "$fzf_url" -o "$tmp_fzf"
    mkdir -p "$HOME/.local/bin"
    tar -xzf "$tmp_fzf" -C "$HOME/.local/bin/" fzf
    rm -f "$tmp_fzf"
    export PATH="$HOME/.local/bin:$PATH"
}

install_fzf() {
    warn "fzf non trouvé."
    echo -e "  ${GRV_FG}Installer fzf ? [o/N]${RESET} \c"
    read -r answer
    [[ "$answer" != "o" && "$answer" != "O" ]] && err "fzf requis. Abandon." && exit 1
    if command -v apt-get &>/dev/null; then
        debug "Installation via apt"
        apt-get install -y fzf 2>/dev/null || _install_fzf_binary
    else
        _install_fzf_binary
    fi
    command -v fzf &>/dev/null && ok "fzf installé." || { err "Impossible d'installer fzf."; exit 1; }
}

# ── Vérification des dépendances ──────────────────────────────────
check_deps() {
    header "Vérification des dépendances"
    command -v git &>/dev/null || { err "git non trouvé. Installer git et relancer."; exit 1; }
    ok "git $(git --version | awk '{print $3}')"
    command -v fzf &>/dev/null || install_fzf
    ok "fzf $(fzf --version | awk '{print $1}')"
}

# ── Détection des agents IA ───────────────────────────────────────
DETECTED_AGENTS=()

detect_agents() {
    header "Détection des agents IA"

    _check_agent() {
        local name="$1" primary="$2" secondary="$3"
        if [[ -n "$SKILLS_AGENT" && "$SKILLS_AGENT" != "$name" ]]; then
            debug "Agent $name ignoré (SKILLS_AGENT=$SKILLS_AGENT)"
            return
        fi
        if eval "$primary" &>/dev/null 2>&1 || eval "$secondary" &>/dev/null 2>&1; then
            DETECTED_AGENTS+=("$name")
            ok "Agent détecté : $name"
        else
            echo -e "${GRV_GRAY}${ICO_NA}  Agent absent : $name${RESET}"
        fi
    }

    local npm_prefix
    npm_prefix=$(npm config get prefix 2>/dev/null || echo "")

    _check_agent "claude-code" "test -d $HOME/.claude" "command -v claude"
    _check_agent "gemini-cli"  "command -v gemini"     "test -f ${npm_prefix}/bin/gemini"
    _check_agent "codex"       "command -v codex"      "test -f $HOME/.npm-global/bin/codex"
    _check_agent "hermes"      "command -v hermes"     "test -f $HOME/.local/bin/hermes"

    if [[ ${#DETECTED_AGENTS[@]} -eq 0 ]]; then
        warn "Aucun agent IA détecté. L'installation continuera mais aucun skill ne sera filtré."
    fi
}

# ── Clone du dépôt ────────────────────────────────────────────────
clone_repo() {
    header "Récupération du dépôt"
    if [[ -n "$SKILLS_REPO" ]]; then
        REPO_DIR="$SKILLS_REPO"
        info "Utilisation du dépôt local : $REPO_DIR"
        return
    fi
    info "Clonage depuis $REPO_URL..."
    git clone --depth=1 "$REPO_URL" "$REPO_DIR" &>/dev/null
    ok "Dépôt cloné dans $REPO_DIR"
}

# ── Gestion des versions ──────────────────────────────────────────
get_frontmatter_field() {
    local file="$1" field="$2"
    grep "^${field}:" "$file" 2>/dev/null | head -1 | awk '{print $2}' | tr -d "\"'"
}

# Retourne 0 (succès) si ver2 est plus récente que ver1
version_is_newer() {
    local ver1="$1" ver2="$2"
    [[ "$ver1" == "$ver2" ]] && return 1
    local newest
    newest=$(printf '%s\n%s' "$ver1" "$ver2" | sort -V | tail -1)
    [[ "$newest" == "$ver2" ]]
}

# ── Chemins de destination ────────────────────────────────────────
get_dest_path() {
    local cat="$1" skill="$2" agent="$3" scope="$4"
    local base
    case "$agent" in
        claude-code) [[ "$scope" == "global" ]] && base="$HOME/.claude" || base=".claude" ;;
        gemini-cli)  [[ "$scope" == "global" ]] && base="$HOME/.gemini"  || base=".gemini" ;;
        codex)       [[ "$scope" == "global" ]] && base="$HOME/.codex"   || base=".codex" ;;
        hermes)      [[ "$scope" == "global" ]] && base="$HOME/.hermes"  || base=".hermes" ;;
    esac
    echo "${base}/skills/${cat}/${skill}/SKILL.md"
}

get_local_version() {
    local cat="$1" skill="$2" agent="$3"
    local dest
    dest=$(get_dest_path "$cat" "$skill" "$agent" "local")
    [[ -f "$dest" ]] && get_frontmatter_field "$dest" "version" || echo ""
}

# ── Scan des skills disponibles ───────────────────────────────────
# Format : "cat|skill|agent|etat|repo_version|local_version"
SKILLS_LIST=()

scan_skills() {
    header "Scan des skills disponibles"
    SKILLS_LIST=()

    while IFS= read -r skill_file; do
        local rel="${skill_file#${REPO_DIR}/skills/}"
        local agent_file="${rel##*/}"
        local agent="${agent_file%.md}"
        local skill_path="${rel%/*}"
        local cat="${skill_path%%/*}"
        local skill="${skill_path#*/}"

        # Filtre agent
        local agent_detected=0
        for a in "${DETECTED_AGENTS[@]:-}"; do
            [[ "$a" == "$agent" ]] && agent_detected=1
        done
        [[ "$agent_detected" -eq 0 && ${#DETECTED_AGENTS[@]} -gt 0 ]] && continue

        # Filtre tag
        if [[ -n "$SKILLS_TAG" ]]; then
            grep -q "$SKILLS_TAG" "$skill_file" || continue
        fi

        local repo_ver; repo_ver=$(get_frontmatter_field "$skill_file" "version")
        local local_ver; local_ver=$(get_local_version "$cat" "$skill" "$agent")
        local etat

        if [[ -z "$local_ver" ]]; then
            etat="new"
        elif version_is_newer "$local_ver" "$repo_ver"; then
            etat="upd"
        else
            etat="ok"
        fi

        SKILLS_LIST+=("${cat}|${skill}|${agent}|${etat}|${repo_ver}|${local_ver}")
        debug "Skill trouvé : $cat/$skill [$agent] état=$etat"
    done < <(find "${REPO_DIR}/skills" -name "*.md" | sort)

    ok "${#SKILLS_LIST[@]} skill(s) trouvé(s)"
}