#!/usr/bin/env bash
# One-time installer for claude-mode (Linux / macOS).
#
# Installs to ~/.claude-mode, symlinks the entry point into ~/.local/bin, and
# adds a marked block to your shell rc for the `claude` wrapper.
#
# Idempotent: safe to re-run to upgrade. Existing presets are kept unless
# --force is passed. ~/.claude/settings.json is NOT touched here - only by an
# actual `claude-mode <mode>`.

set -euo pipefail

FORCE=0
SKIP_KEY=0
for arg in "$@"; do
    case "$arg" in
        --force)          FORCE=1 ;;
        --skip-key-prompt) SKIP_KEY=1 ;;
        -h|--help) echo "usage: install.sh [--force] [--skip-key-prompt]"; exit 0 ;;
    esac
done

SRC="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT="${CM_ROOT:-$HOME/.claude-mode}"
BINDIR="$HOME/.local/bin"

green() { printf '  \033[32mok  \033[0m %s\n' "$*"; }
warn()  { printf '  \033[33mwarn\033[0m %s\n' "$*"; }
fail()  { printf '  \033[31mFAIL\033[0m %s\n' "$*"; }

printf '\ninstalling claude-mode -> %s\n' "$ROOT"

# --- preflight -------------------------------------------------------------
PY="${CLAUDE_MODE_PYTHON:-python3}"
if ! command -v "$PY" >/dev/null 2>&1; then
    fail "python3 not found. claude-mode uses it for JSON handling."
    fail "install it (apt install python3 / dnf install python3 / brew install python) and re-run."
    exit 1
fi
green "python3: $(command -v "$PY")"

if ! command -v curl >/dev/null 2>&1; then
    warn 'curl not found - `models` and `doctor` network checks will not work'
fi
if ! command -v claude >/dev/null 2>&1; then
    warn 'claude is not on PATH - claude-mode installs anyway, but nothing uses its config yet'
fi

# --- directories -----------------------------------------------------------
mkdir -p "$ROOT/bin" "$ROOT/presets" "$ROOT/vault" "$ROOT/backups" "$BINDIR"
chmod 700 "$ROOT" "$ROOT/vault" 2>/dev/null || true

# --- payload ---------------------------------------------------------------
install -m 0755 "$SRC/claude-mode"          "$ROOT/bin/claude-mode"
install -m 0755 "$SRC/claude-key-helper.sh" "$ROOT/bin/claude-key-helper.sh"
install -m 0644 "$SRC/cm-json.py"           "$ROOT/bin/cm-json.py"
install -m 0644 "$SRC/cm-vault.sh"          "$ROOT/bin/cm-vault.sh"
green 'copied claude-mode + helpers'

# cm_version() reads this; without it every health.json reported 0.0.0.
VERSION_SRC="$SRC/../VERSION"
[ -f "$VERSION_SRC" ] || VERSION_SRC="$SRC/VERSION"
if [ -f "$VERSION_SRC" ]; then
    install -m 0644 "$VERSION_SRC" "$ROOT/VERSION"
    green "version $(tr -d '[:space:]' < "$ROOT/VERSION")"
fi

# --- presets (shared with the Windows build) -------------------------------
PRESET_SRC="$SRC/../presets"
[ -d "$PRESET_SRC" ] || PRESET_SRC="$SRC/presets"
if [ -d "$PRESET_SRC" ]; then
    for f in "$PRESET_SRC"/*.json; do
        [ -e "$f" ] || continue
        base="$(basename "$f")"
        if [ -e "$ROOT/presets/$base" ] && [ "$FORCE" -eq 0 ]; then
            printf '  skip preset %s (exists; --force to overwrite)\n' "${base%.json}"
        else
            install -m 0644 "$f" "$ROOT/presets/$base"
            green "preset ${base%.json}"
        fi
    done
else
    warn 'no presets directory found in the payload'
fi

# --- initial state ---------------------------------------------------------
if [ ! -f "$ROOT/state.json" ]; then
    printf '{\n  "mode": "anthropic",\n  "preset": "",\n  "writtenEnvKeys": []\n}\n' > "$ROOT/state.json"
    green 'state.json initialised (mode=anthropic)'
fi

# --- PATH entry ------------------------------------------------------------
ln -sf "$ROOT/bin/claude-mode" "$BINDIR/claude-mode"
green "linked $BINDIR/claude-mode"

case ":$PATH:" in
    *":$BINDIR:"*) ;;
    *) warn "$BINDIR is not on PATH - add it in your shell rc: export PATH=\"\$HOME/.local/bin:\$PATH\"" ;;
esac

# --- shell rc block --------------------------------------------------------
SNIPPET="$SRC/shell-snippet.sh"
START='# >>> claude-mode >>>'
END='# <<< claude-mode <<<'

add_block() {
    local rc="$1"
    [ -f "$rc" ] || return 0
    if grep -qF "$START" "$rc" 2>/dev/null; then
        # replace the existing block in place
        "$PY" - "$rc" "$SNIPPET" "$START" "$END" <<'PYEOF'
import sys, re
rc, snip, start, end = sys.argv[1:5]
body = open(rc, encoding='utf-8').read()
new  = open(snip, encoding='utf-8').read().rstrip('\n')
pattern = re.compile(re.escape(start) + r'.*?' + re.escape(end), re.S)
open(rc, 'w', encoding='utf-8').write(pattern.sub(lambda _: new, body))
PYEOF
        green "updated claude-mode block in $rc"
    else
        printf '\n%s\n' "$(cat "$SNIPPET")" >> "$rc"
        green "appended claude-mode block to $rc"
    fi
}

RC_TOUCHED=0
for rc in "$HOME/.bashrc" "$HOME/.zshrc"; do
    if [ -f "$rc" ]; then add_block "$rc"; RC_TOUCHED=1; fi
done
[ "$RC_TOUCHED" -eq 0 ] && warn 'no ~/.bashrc or ~/.zshrc found - the `claude` wrapper was not installed'

# --- key -------------------------------------------------------------------
if [ "$SKIP_KEY" -eq 0 ]; then
    # shellcheck source=/dev/null
    . "$ROOT/bin/cm-vault.sh"
    if cm_vault_has openrouter && [ "$FORCE" -eq 0 ]; then
        green 'OpenRouter key already stored'
    else
        printf '\n'
        "$ROOT/bin/claude-mode" set-key openrouter || warn 'key not stored - run `claude-mode set-key openrouter` later'
    fi
fi

# --- machine-readable state ------------------------------------------------
"$ROOT/bin/claude-mode" health >/dev/null 2>&1 && green 'health.json seeded'

printf '\ndone. Open a new shell, then:\n'
printf '  claude-mode\n'
printf '  claude-mode status\n'
printf '  claude-mode doctor\n'