#!/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_$$"
_CLONED_REPO_DIR=""
STATE_FILE="/tmp/skills_state_$$"

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 $_CLONED_REPO_DIR et $STATE_FILE"
    [[ -n "$_CLONED_REPO_DIR" && -d "$_CLONED_REPO_DIR" ]] && rm -rf "$_CLONED_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"

    _add_agent() {
        local name="$1"
        if [[ -n "$SKILLS_AGENT" && "$SKILLS_AGENT" != "$name" ]]; then
            debug "Agent $name ignoré (SKILLS_AGENT=$SKILLS_AGENT)"
            return
        fi
        DETECTED_AGENTS+=("$name")
        ok "Agent détecté : $name"
    }

    _skip_agent() {
        local name="$1"
        if [[ -z "$SKILLS_AGENT" || "$SKILLS_AGENT" == "$name" ]]; then
            echo -e "${GRV_GRAY}${ICO_NA}  Agent absent : $name${RESET}"
        fi
    }

    _detect_gemini() {
        command -v gemini &>/dev/null && return 0
        local prefix
        prefix=$(npm config get prefix 2>/dev/null) || return 1
        [[ -n "$prefix" && -f "${prefix}/bin/gemini" ]]
    }

    # claude-code
    if [[ -d "$HOME/.claude" ]] || command -v claude &>/dev/null; then
        _add_agent "claude-code"
    else
        _skip_agent "claude-code"
    fi

    # gemini-cli
    if _detect_gemini; then
        _add_agent "gemini-cli"
    else
        _skip_agent "gemini-cli"
    fi

    # codex
    if command -v codex &>/dev/null || [[ -f "$HOME/.npm-global/bin/codex" ]]; then
        _add_agent "codex"
    else
        _skip_agent "codex"
    fi

    # hermes
    if command -v hermes &>/dev/null || [[ -f "$HOME/.local/bin/hermes" ]]; then
        _add_agent "hermes"
    else
        _skip_agent "hermes"
    fi

    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" "$REPO_DIR" &>/dev/null
    _CLONED_REPO_DIR="$REPO_DIR"
    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
        if [[ ${#DETECTED_AGENTS[@]} -gt 0 ]]; then
            for a in "${DETECTED_AGENTS[@]}"; do
                [[ "$a" == "$agent" ]] && agent_detected=1
            done
        fi
        [[ "$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)"
}

# ── Clé d'état normalisée ────────────────────────────────────────
make_key() {
    # Entrée : "cat|skill|agent|..." — Sortie : clé normalisée pour STATE_FILE
    local entry="$1"
    local cat skill agent
    IFS='|' read -r cat skill agent _ <<< "$entry"
    # Normalise en remplaçant - et / par _ pour éviter les collisions
    printf '%s_%s_%s' "${cat//-/_}" "${skill//-/_}" "${agent//-/_}"
}

# ── État du menu ──────────────────────────────────────────────────
state_init() {
    : > "$STATE_FILE"
    for entry in "${SKILLS_LIST[@]}"; do
        local key; key=$(make_key "$entry")
        echo "${key}=local" >> "$STATE_FILE"
    done
}

state_get() {
    grep "^${1}=" "$STATE_FILE" 2>/dev/null | cut -d'=' -f2
}

state_cycle() {
    local key="$1" etat="$2"
    local current; current=$(state_get "$key")
    local next
    case "$current" in
        local)  next="global" ;;
        global) next="skip" ;;
        skip)   [[ "$etat" == "upd" ]] && next="update" || next="local" ;;
        update) next="local" ;;
        *)      next="local" ;;
    esac
    sed -i "s|^${key}=.*|${key}=${next}|" "$STATE_FILE"
}

# ── Formatage ligne menu ──────────────────────────────────────────
format_skill_line() {
    local entry="$1"
    local cat skill agent etat repo_ver local_ver
    IFS='|' read -r cat skill agent etat repo_ver local_ver <<< "$entry"
    local key; key=$(make_key "$entry")
    local action; action=$(state_get "$key")

    local ico_etat color_etat
    case "$etat" in
        ok)  ico_etat="$ICO_OK";  color_etat="$GRV_GREEN" ;;
        upd) ico_etat="$ICO_UPD"; color_etat="$GRV_YELLOW" ;;
        new) ico_etat="$ICO_NEW"; color_etat="$GRV_AQUA" ;;
        *)   ico_etat="$ICO_NA";  color_etat="$GRV_GRAY" ;;
    esac

    local ico_action color_action
    case "$action" in
        local)  ico_action="$ICO_LOCAL";  color_action="$GRV_GREEN" ;;
        global) ico_action="$ICO_GLOBAL"; color_action="$GRV_BLUE" ;;
        skip)   ico_action="$ICO_SKIP";   color_action="$GRV_GRAY" ;;
        update) ico_action="$ICO_UPD";    color_action="$GRV_YELLOW" ;;
        *)      ico_action="$ICO_SKIP";   color_action="$GRV_GRAY" ;;
    esac

    local ver_info=""
    [[ "$etat" == "upd" ]] && ver_info=" (${local_ver}→${repo_ver})"
    [[ "$etat" == "new" ]] && ver_info=" (v${repo_ver})"

    printf "${color_etat}%s${RESET}  %-35s ${GRV_GRAY}[%s]${RESET}  ${color_action}%s${RESET}%s\n" \
        "$ico_etat" "${cat}/${skill}" "$agent" "$ico_action" "$ver_info"
}

# ── Menu fzf principal ────────────────────────────────────────────
run_menu() {
    header "Sélection des skills"
    state_init

    local cycle_script="/tmp/skills_cycle_$$.sh"
    local list_script="/tmp/skills_list_$$.sh"
    local fns_file="/tmp/skills_fns_$$.sh"

    # Script de cycle d'état (appelé par fzf via execute-silent)
    cat > "$cycle_script" << 'CYCLE_EOF'
#!/usr/bin/env bash
STATE_FILE="$1"
SKILLS_FNS="$2"
LINE_NUM="$3"  # numéro de ligne fzf (1-based)

source "$SKILLS_FNS"

# Récupère l'entrée correspondante (0-based dans SKILLS_LIST)
idx=$(( LINE_NUM - 1 ))
entry="${SKILLS_LIST[$idx]:-}"
[[ -z "$entry" ]] && exit 0

key=$(make_key "$entry")
etat=$(echo "$entry" | cut -d'|' -f4)

current=$(grep "^${key}=" "$STATE_FILE" 2>/dev/null | cut -d'=' -f2)
case "$current" in
    local)  next="global" ;;
    global) next="skip" ;;
    skip)   [[ "$etat" == "upd" ]] && next="update" || next="local" ;;
    update) next="local" ;;
    *)      next="local" ;;
esac
sed -i "s|^${key}=.*|${key}=${next}|" "$STATE_FILE"
CYCLE_EOF
    chmod +x "$cycle_script"

    # Exporter fonctions et variables dans un fichier source
    {
        declare -f format_skill_line state_get make_key
        declare -p GRV_GREEN GRV_YELLOW GRV_AQUA GRV_GRAY GRV_BLUE RESET \
                   ICO_OK ICO_UPD ICO_NEW ICO_NA ICO_LOCAL ICO_GLOBAL ICO_SKIP
        echo "STATE_FILE='$STATE_FILE'"
        echo "SKILLS_LIST=($(printf '"%s" ' "${SKILLS_LIST[@]}"))"
    } > "$fns_file"

    # Script générateur de liste pour fzf --reload
    cat > "$list_script" << LIST_EOF
#!/usr/bin/env bash
source "$fns_file"
for entry in "\${SKILLS_LIST[@]}"; do
    format_skill_line "\$entry"
done
LIST_EOF
    chmod +x "$list_script"

    local legend
    legend=$(echo -e "${GRV_GRAY}État: ${GRV_GREEN}✓ installé  ${GRV_YELLOW}↑ MAJ  ${GRV_AQUA}+ nouveau   Action: ${GRV_GREEN}●L local  ${GRV_BLUE}●G global  ${GRV_GRAY}○ ignorer   TAB=changer ENTER=confirmer ESC=quitter${RESET}")

    fzf \
        --ansi \
        --prompt="Skills > " \
        --header="$legend" \
        --bind="tab:execute-silent($cycle_script '$STATE_FILE' '$fns_file' {n})+reload($list_script)" \
        < <(bash "$list_script") > /dev/null || true

    rm -f "$cycle_script" "$list_script" "$fns_file"
}

# ── Installation ──────────────────────────────────────────────────
install_selected() {
    header "Installation"
    local count_install=0 count_update=0 count_skip=0

    for entry in "${SKILLS_LIST[@]}"; do
        local cat skill agent etat repo_ver local_ver
        IFS='|' read -r cat skill agent etat repo_ver local_ver <<< "$entry"
        local key; key=$(make_key "$entry")
        local action; action=$(state_get "$key")

        if [[ "$action" == "skip" ]]; then
            (( count_skip++ )) || true
            continue
        fi

        local scope="$action"
        [[ "$action" == "update" ]] && scope="local"

        local src="${REPO_DIR}/skills/${cat}/${skill}/${agent}.md"
        local dest; dest=$(get_dest_path "$cat" "$skill" "$agent" "$scope")

        debug "Copie $src → $dest"

        if [[ "$SKILLS_DRY_RUN" == "1" ]]; then
            info "[DRY-RUN] cp $src → $dest"
        else
            mkdir -p "$(dirname "$dest")"
            cp "$src" "$dest"
        fi

        if [[ "$action" == "update" ]]; then
            ok "Mis à jour : ${cat}/${skill} [${agent}] ${local_ver}→${repo_ver}"
            (( count_update++ )) || true
        else
            ok "Installé : ${cat}/${skill} [${agent}] → ${scope}"
            (( count_install++ )) || true
        fi
    done

    echo -e "\n${GRV_PURPLE}╔══ Bilan ══╗${RESET}"
    echo -e "  ${GRV_GREEN}${ICO_OK} $count_install installé(s)${RESET}"
    echo -e "  ${GRV_YELLOW}${ICO_UPD} $count_update mis à jour${RESET}"
    echo -e "  ${GRV_GRAY}${ICO_SKIP} $count_skip ignoré(s)${RESET}"
}

# ── Récapitulatif final ───────────────────────────────────────────
print_summary() {
    local shown=()

    echo -e "\n${GRV_PURPLE}╔══ Tester vos skills ══╗${RESET}\n"
    for entry in "${SKILLS_LIST[@]}"; do
        local cat skill agent etat repo_ver local_ver
        IFS='|' read -r cat skill agent etat repo_ver local_ver <<< "$entry"
        local key; key=$(make_key "$entry")
        local action; action=$(state_get "$key")
        [[ "$action" == "skip" ]] && continue

        local already=0
        if [[ ${#shown[@]} -gt 0 ]]; then
            for s in "${shown[@]}"; do [[ "$s" == "${skill}|${agent}" ]] && already=1; done
        fi
        [[ "$already" -eq 1 ]] && continue
        shown+=("${skill}|${agent}")

        case "$agent" in
            claude-code) echo -e "  ${GRV_AQUA}claude \"utilise le skill ${skill}\" --print${RESET}" ;;
            gemini-cli)  echo -e "  ${GRV_AQUA}gemini -p \"utilise le skill ${skill}\"${RESET}" ;;
            codex)       echo -e "  ${GRV_AQUA}codex \"\$${skill}\"${RESET}" ;;
            hermes)      echo -e "  ${GRV_AQUA}hermes \"utilise le skill ${skill}\"${RESET}" ;;
        esac
    done

    echo -e "\n${GRV_PURPLE}╔══ Documentation agents ══╗${RESET}\n"
    for agent in "${DETECTED_AGENTS[@]}"; do
        case "$agent" in
            claude-code) echo -e "  ${GRV_BLUE}Claude Code${RESET}  →  https://code.claude.com/docs/en/skills" ;;
            gemini-cli)  echo -e "  ${GRV_BLUE}Gemini CLI ${RESET}  →  https://github.com/google-gemini/gemini-cli/blob/main/docs/cli/skills.md" ;;
            codex)       echo -e "  ${GRV_BLUE}Codex      ${RESET}  →  https://developers.openai.com/codex/skills" ;;
            hermes)      echo -e "  ${GRV_BLUE}Hermes     ${RESET}  →  https://hermes-agent.nousresearch.com/docs/user-guide/features/skills/" ;;
        esac
    done
    echo ""
}

# ── Point d'entrée ────────────────────────────────────────────────
main() {
    echo -e "\n${GRV_PURPLE}╔══════════════════════════════════════╗${RESET}"
    echo -e "${GRV_PURPLE}║   mes_skills — Installeur de skills   ║${RESET}"
    echo -e "${GRV_PURPLE}╚══════════════════════════════════════╝${RESET}\n"

    check_deps
    detect_agents
    clone_repo
    scan_skills

    if [[ ${#SKILLS_LIST[@]} -eq 0 ]]; then
        warn "Aucun skill compatible trouvé. Vérifier les agents détectés ou SKILLS_TAG."
        exit 0
    fi

    run_menu
    install_selected
    print_summary
}

main "$@"