#!/usr/bin/env bash
# Launch an interactive (TUI) Mosaic agent in its container.
#
# Usage:
#   scripts/agent.sh <name> [--mission <file>] [--workspace <ws>]
#                    [--session <name>] [--tools <comma,list>]
#
# The agent receives the four immutable contracts (constitution, standards,
# SOUL, USER) plus its own identity and optional mission directives as its
# system prompt, a persistent named session, and - if declared - a
# workspace and tool capabilities. The TUI opens clean; you drive.
#
# This is the Mosaic alternative to launching vanilla pi: same engine,
# governed context.
set -euo pipefail
cd "$(dirname "$0")/.."
# shellcheck source=common.sh
source scripts/common.sh

NAME=""
MISSION=""
WORKSPACE=""
SESSION=""
TOOLS=""

while [ $# -gt 0 ]; do
    case "$1" in
        --mission)   MISSION="${2:?}"; shift 2 ;;
        --workspace) WORKSPACE="${2:?}"; shift 2 ;;
        --session)   SESSION="${2:?}"; shift 2 ;;
        --tools)     TOOLS="${2:?}"; shift 2 ;;
        --help|-h)   sed -n '2,12p' "$0"; exit 0 ;;
        *)           NAME="$1"; shift ;;
    esac
done

[ -n "$NAME" ] || { echo "agent: usage: scripts/agent.sh <name> [--mission f] [--workspace ws] [--session s] [--tools list]" >&2; exit 4; }
case "$NAME" in *[!A-Za-z0-9._-]*|'') echo "agent: invalid agent name" >&2; exit 4;; esac

load_config
load_release
bootstrap_runtime_dir

# Agent seat definition (M15): when agents/<name>/agent.json exists it is
# strictly validated and its values become defaults (CLI flags override).
# The seat's SOUL.md overrides the contract persona; governance contracts
# are never overridden.
AGENTS_DIR="${MOSAIC_AGENTS_DIR:-agents}"
ROLE=""
DEFCAPS=""
if [ -f "$AGENTS_DIR/$NAME/agent.json" ]; then
    DEFAULTS_FILE="$(mktemp)"
    node -e '
const fs = require("fs");
const p = JSON.parse(fs.readFileSync(process.argv[1], "utf8"));
if (p.agentVersion !== 1) process.exit(2);
const ID = /^[a-z0-9][a-z0-9._-]{0,63}$/;
if (typeof p.name !== "string" || !ID.test(p.name)) process.exit(2);
if (p.role !== undefined && (typeof p.role !== "string" || !ID.test(p.role))) process.exit(2);
let tools = "";
if (p.capabilities !== undefined) {
    if (typeof p.capabilities !== "object" || p.capabilities === null || Array.isArray(p.capabilities)) process.exit(2);
    for (const k of Object.keys(p.capabilities)) if (k !== "tools") process.exit(2);
    if (!Array.isArray(p.capabilities.tools) || p.capabilities.tools.some(t => !/^[a-z]+$/.test(t))) process.exit(2);
    tools = p.capabilities.tools.join(",");
}
fs.writeFileSync(process.argv[2], "AGENT_DEF_ROLE=" + (p.role || "") + "\nAGENT_DEF_CAPS=" + tools + "\n");
' "$AGENTS_DIR/$NAME/agent.json" "$DEFAULTS_FILE" || { rm -f "$DEFAULTS_FILE"; echo "agent: invalid agent definition" >&2; exit 2; }
    AGENT_DEF_ROLE=""; AGENT_DEF_CAPS=""
    while IFS= read -r line; do
        case "$line" in
            AGENT_DEF_ROLE=*) AGENT_DEF_ROLE="${line#AGENT_DEF_ROLE=}" ;;
            AGENT_DEF_CAPS=*) AGENT_DEF_CAPS="${line#AGENT_DEF_CAPS=}" ;;
        esac
    done < "$DEFAULTS_FILE"
    rm -f "$DEFAULTS_FILE"
    ROLE="$AGENT_DEF_ROLE"
    DEFCAPS="$AGENT_DEF_CAPS"
    [ -r "$AGENTS_DIR/$NAME/SOUL.md" ] || { echo "agent: definition dir missing SOUL.md: $AGENTS_DIR/$NAME" >&2; exit 4; }
    mkdir -p "$MOSAIC_DEV_DIR/agents/$NAME"
    cp "$AGENTS_DIR/$NAME/SOUL.md" "$MOSAIC_DEV_DIR/agents/$NAME/SOUL.md"
    export MOSAIC_AGENT_SOUL_FILE="/var/lib/mosaic/agents/$NAME/SOUL.md"
    # Seat record: written once at instantiation.
    SEAT="$MOSAIC_DEV_DIR/agents/$NAME/seat.json"
    if [ ! -f "$SEAT" ]; then
        printf '{"seatVersion":1,"name":"%s","role":"%s","instantiatedAt":"%s"}\n' \
            "$NAME" "$ROLE" "$(date -u +%Y-%m-%dT%H:%M:%SZ)" > "$SEAT"
    fi
fi

SESSION="${SESSION:-agent-$NAME}"
mkdir -p "$MOSAIC_DEV_DIR/sessions/$SESSION"
export MOSAIC_SESSION_DIR="/var/lib/mosaic/sessions/$SESSION"
export MOSAIC_AGENT_NAME="$NAME"
[ -n "$ROLE" ] && export MOSAIC_AGENT_ROLE="$ROLE"
export MOSAIC_INTERACTIVE=1
if [ -z "$TOOLS" ] && [ -n "$DEFCAPS" ]; then TOOLS="$DEFCAPS"; fi
export MOSAIC_TOOLS="${TOOLS:+$TOOLS}"

if [ -n "$MISSION" ]; then
    [ -r "$MISSION" ] || { echo "agent: mission file not readable: $MISSION" >&2; exit 4; }
    mkdir -p "$MOSAIC_DEV_DIR/agent-missions"
    cp "$MISSION" "$MOSAIC_DEV_DIR/agent-missions/$NAME.json"
    export MOSAIC_MISSION_FILE="/var/lib/mosaic/agent-missions/$NAME.json"
fi

# Workspace (M13): defaults to a persistent per-agent workspace
# (workspaces/<agent>) so the agent has a real, host-visible home instead
# of the container's neutral /workspace. Override with --workspace <ws>.
[ -n "$WORKSPACE" ] || WORKSPACE="$NAME"
case "$WORKSPACE" in *[!A-Za-z0-9._-]*|'') echo "agent: invalid workspace name" >&2; exit 4;; esac
mkdir -p "$MOSAIC_DEV_DIR/workspaces/$WORKSPACE"
export MOSAIC_WORKSPACE="/var/lib/mosaic/workspaces/$WORKSPACE"

echo "agent: launching TUI agent '$NAME' (session: $SESSION, adapter: $MOSAIC_ADAPTER, model: $MOSAIC_MODEL)"
echo "agent: contracts + $([ -n "$MISSION" ] && echo 'mission' || echo 'no mission') loaded; exit the TUI with /quit"
# No -T: the TTY is the point. Ctrl+C twice or /quit exits.
exec docker compose run --rm mosaic-agent