"""Hermes CLI — click 壳."""

import json
import os
import signal
import subprocess
import sys
import textwrap
import time
from pathlib import Path

# Fix Unicode display on Windows (GBK terminal)
if sys.platform == "win32":
    sys.stdout.reconfigure(encoding="utf-8", errors="replace")
    sys.stderr.reconfigure(encoding="utf-8", errors="replace")

import click
from hermes_core.querier import HermesClient
from hermes_core.refiner import refine_scene
from hermes_core.db import init_db, get_record, update_record_state, get_active_records
from hermes_core.types import RecordState, HERMES_DATA_DIR
from hermes_core.config import get_config, save_config, ensure_config_exists, HermesConfig, CONFIG_FILE


# ═══════════════════════════════════════════════════════════════
# 工具函数
# ═══════════════════════════════════════════════════════════════

def _echo_json(data: dict) -> None:
    click.echo(json.dumps(data, ensure_ascii=False, indent=2))


def _check_model_cached() -> bool:
    """检查 embedding 模型是否已下载。"""
    from hermes_core.embedder import Embedder
    return Embedder.is_available()


# ═══════════════════════════════════════════════════════════════
# 主命令组
# ═══════════════════════════════════════════════════════════════

@click.group()
def cli():
    """Hermes 联想引擎 — Agent 偏好学习与共享."""


# ═══════════════════════════════════════════════════════════════
# hermes init — 一键初始化
# ═══════════════════════════════════════════════════════════════

@cli.command()
@click.option("--force", "-f", is_flag=True, help="强制重新初始化")
def init(force):
    """初始化 Hermes：创建配置 → 下载模型 → 验证环境。

    首次使用只需运行一次。幂等操作，可安全重复执行。"""

    config = ensure_config_exists()

    click.echo("╔══════════════════════════════════════════╗")
    click.echo("║       Hermes 一键初始化向导               ║")
    click.echo("╚══════════════════════════════════════════╝\n")

    # Step 1: 配置
    click.echo(f"[1/4] 配置文件: {CONFIG_FILE}")
    click.echo(f"       数据目录: {config.data_dir}")
    click.echo(f"       扫描间隔: {config.scan_interval_seconds}s")
    click.echo(f"       匹配阈值: {config.match_threshold}")

    # Step 2: 下载模型
    click.echo(f"\n[2/4] Embedding 模型: {config.embedding_model}")
    if _check_model_cached() and not force:
        click.echo("       ✓ 已缓存")
    else:
        click.echo("       正在下载（约 420MB，首次约 2-5 分钟）...")
        try:
            from hermes_core.embedder import Embedder
            e = Embedder(config.embedding_model)
            _ = e.encode("test")  # 触发加载
            click.echo("       ✓ 下载完成")
        except Exception as exc:
            click.echo(f"       ✗ 下载失败: {exc}")
            click.echo("       可稍后手动运行: hermes download-models")

    # Step 3: 检查训练依赖
    click.echo("\n[3/4] QLoRA 训练依赖 (torch + transformers)")
    try:
        import torch
        import transformers
        import peft
        click.echo(f"       ✓ torch {torch.__version__}, transformers {transformers.__version__}")
    except ImportError:
        click.echo("       ! 未安装（跳过训练的推理模式仍可用）")
        click.echo("       安装训练依赖: pip install -e '.[train]'")

    # Step 4: 启动 daemon
    click.echo(f"\n[4/4] 下一步")
    click.echo(f"       hermes start           # 后台启动 daemon")
    click.echo(f"       hermes status          # 查看运行状态")
    click.echo(f"       hermes demo            # 运行交互演示")
    click.echo(f"\n✅ 初始化完成!")


# ═══════════════════════════════════════════════════════════════
# hermes download-models — 预下载模型
# ═══════════════════════════════════════════════════════════════

@cli.command("download-models")
def download_models():
    """预下载 embedding 模型（避免首次使用时等待）。"""
    config = get_config()
    click.echo(f"下载 embedding 模型: {config.embedding_model}")
    click.echo("（约 420MB，可能需要 2-5 分钟）\n")

    try:
        from sentence_transformers import SentenceTransformer
        # SentenceTransformer 自带进度条
        model = SentenceTransformer(config.embedding_model)
        _ = model.encode("test")
        click.echo("\n✅ 模型下载完成")
    except Exception as e:
        click.echo(f"\n❌ 下载失败: {e}")
        click.echo("请检查网络连接，或设置 HF_ENDPOINT=https://hf-mirror.com 使用镜像")
        sys.exit(1)


# ═══════════════════════════════════════════════════════════════
# hermes start / stop / status — daemon 生命周期
# ═══════════════════════════════════════════════════════════════

@cli.command()
def start():
    """后台启动 Hermes Daemon。"""
    config = get_config()
    pid_file = Path(config.pid_file)
    log_file = Path(config.log_file)

    if pid_file.exists():
        pid = int(pid_file.read_text().strip())
        try:
            os.kill(pid, 0)
            click.echo(f"Daemon 已在运行 (PID: {pid})")
            return
        except OSError:
            pid_file.unlink()

    pid_file.parent.mkdir(parents=True, exist_ok=True)
    log_file.parent.mkdir(parents=True, exist_ok=True)

    log_f = open(str(log_file), "a")
    proc = subprocess.Popen(
        [sys.executable, "-m", "daemon.daemon"],
        stdout=log_f, stderr=log_f,
        start_new_session=True,
    )
    pid_file.write_text(str(proc.pid))

    time.sleep(1)
    if proc.poll() is None:
        click.echo(f"✅ Daemon 已启动 (PID: {proc.pid})")
        click.echo(f"   日志: {log_file}")
        click.echo(f"   查看状态: hermes status")
    else:
        click.echo(f"❌ Daemon 启动失败，查看日志: {log_file}")
        sys.exit(1)


@cli.command()
def stop():
    """停止 Hermes Daemon。"""
    config = get_config()
    pid_file = Path(config.pid_file)

    if not pid_file.exists():
        click.echo("Daemon 未在运行")
        return

    pid = int(pid_file.read_text().strip())
    try:
        os.kill(pid, signal.SIGTERM)
        for _ in range(10):
            try:
                os.kill(pid, 0)
                time.sleep(0.3)
            except OSError:
                break
        else:
            os.kill(pid, signal.SIGKILL)
        pid_file.unlink()
        click.echo(f"✅ Daemon 已停止 (PID: {pid})")
    except OSError:
        pid_file.unlink()
        click.echo("Daemon 已不在运行")


@cli.command()
@click.option("--user", "-u", default=None, help="按用户过滤")
def status(user):
    """查看 Hermes 运行状态。"""
    config = get_config()
    pid_file = Path(config.pid_file)

    output = {"daemon": "stopped", "pid": None}

    if pid_file.exists():
        try:
            pid = int(pid_file.read_text().strip())
            os.kill(pid, 0)
            output["daemon"] = "running"
            output["pid"] = pid
        except OSError:
            pid_file.unlink()

    # 汇总统计
    try:
        db_path = Path(config.data_dir) / "users"
        if db_path.exists():
            users = [d.name for d in db_path.iterdir() if d.is_dir()]
            total_records = 0
            total_scopes = 0
            for uid in users:
                conn = init_db(uid)
                scopes = conn.execute("SELECT COUNT(*) FROM scopes WHERE status='active'").fetchone()[0]
                records = conn.execute("SELECT COUNT(*) FROM records WHERE state='active'").fetchone()[0]
                conn.close()
                total_scopes += scopes
                total_records += records
            output["users"] = len(users)
            output["active_scopes"] = total_scopes
            output["active_records"] = total_records
    except Exception:
        pass

    if user:
        conn = init_db(user)
        rows = conn.execute(
            "SELECT id, label, record_count, coherence, status FROM scopes ORDER BY last_activity DESC"
        ).fetchall()
        conn.close()
        output["scopes"] = [dict(r) for r in rows]

    _echo_json(output)


# ═══════════════════════════════════════════════════════════════
# hermes demo — 交互体验
# ═══════════════════════════════════════════════════════════════

DEMO_SCENARIOS = [
    {
        "desc": "后端API开发",
        "dims": [{"key": "language", "value": "TypeScript", "context": "未指定语言时默认"},
                 {"key": "framework", "value": "Express", "context": "默认后端框架"}],
    },
    {
        "desc": "后端API开发",
        "dims": [{"key": "language", "value": "TypeScript", "context": "未指定语言时默认"},
                 {"key": "framework", "value": "Express", "context": "默认后端框架"},
                 {"key": "database", "value": "PostgreSQL", "context": "默认数据库"}],
    },
    {
        "desc": "前端开发",
        "dims": [{"key": "framework", "value": "React", "context": "默认前端框架"},
                 {"key": "language", "value": "TypeScript", "context": "默认语言"}],
    },
    {
        "desc": "数据分析",
        "dims": [{"key": "language", "value": "Python", "context": "默认"},
                 {"key": "lib", "value": "Pandas", "context": "数据处理"},
                 {"key": "style", "value": "functional", "context": "函数式风格"}],
    },
    {
        "desc": "周末活动",
        "dims": [{"key": "activity", "value": "户外徒步", "context": "周末偏好"}],
    },
]


@cli.command()
@click.option("--user", "-u", default="demo_user", help="演示用户 ID")
def demo(user):
    """运行交互演示：模拟 Agent 记录偏好 → 查询偏好。

    这是一个沙箱演示，数据写入临时目录，不影响真实数据。"""
    import tempfile

    config = get_config()
    tmp_dir = tempfile.mkdtemp(prefix="hermes_demo_")

    # 用临时目录隔离演示数据
    os.environ["HERMES_DATA_DIR"] = str(tmp_dir)

    from hermes_core.types import HERMES_DATA_DIR as _H
    import hermes_core.db as db_m
    import hermes_core.trainer as tr_m
    db_m.HERMES_DATA_DIR = Path(tmp_dir)
    tr_m.HERMES_DATA_DIR = Path(tmp_dir)

    click.echo("╔══════════════════════════════════════════════════════╗")
    click.echo("║           Hermes 联想引擎 — 交互演示                  ║")
    click.echo("╚══════════════════════════════════════════════════════╝\n")
    click.echo("模拟场景：一个 AI Agent 在与用户对话中记录偏好，")
    click.echo("并在后续对话中自动联想这些偏好。\n")
    click.echo(f"数据目录: {tmp_dir}\n")

    client = HermesClient(user_id=user, agent_id="demo-agent")

    # 阶段 1：记录
    click.echo("━" * 50)
    click.echo("阶段 1：Agent 记录用户偏好 (record_detail)")
    click.echo("━" * 50)
    for i, s in enumerate(DEMO_SCENARIOS, 1):
        click.echo(f"\n  对话 #{i}: 用户提到「{s['desc']}」相关需求")
        r = client.record(s["desc"], s["dims"])
        dims_str = ", ".join(f"{d['key']}={d['value']}" for d in s["dims"])
        click.echo(f"  → Agent 记录: [{dims_str}]")
        if r["status"] == "recorded":
            click.echo(f"    状态: ✓ 已记录 (scope: {r['scope_id'][:12]}...)")
        elif r["status"] == "rejected":
            click.echo(f"    状态: ✗ 被拒绝 ({r['reason']})")
        else:
            click.echo(f"    状态: ↻ {r['status']}")

    # 阶段 2：查询
    click.echo("\n" + "━" * 50)
    click.echo("阶段 2：Agent 推理前查询偏好 (query)")
    click.echo("━" * 50)

    queries = [
        "帮我写一个用户登录的REST API",
        "做一个数据可视化的Dashboard",
        "这周末想出去玩",
    ]
    for q in queries:
        click.echo(f"\n  用户: 「{q}」")
        result = client.query(q)
        if result.matched_scope:
            click.echo(f"  → 匹配场景: {result.matched_scope.scope_label} "
                       f"(置信度 {result.matched_scope.confidence:.0%})")
            for pref in result.related_preferences:
                click.echo(f"    - {pref.key}: {pref.value}")
        else:
            click.echo(f"  → 未匹配到已知场景（将使用默认行为）")
            if result.alternative_scopes:
                alt = result.alternative_scopes[0]
                click.echo(f"    最接近: {alt.scope_label} (置信度 {alt.confidence:.0%})")

    # 阶段 3：查看数据
    click.echo("\n" + "━" * 50)
    click.echo("阶段 3：查看训练集状态")
    click.echo("━" * 50)
    conn = init_db(user)
    scopes = conn.execute("SELECT id, label, record_count, coherence FROM scopes WHERE status='active'").fetchall()
    conn.close()

    click.echo(f"\n  共有 {len(scopes)} 个动态场景:")
    for s_c in scopes:
        click.echo(f"    {s_c['id']} — {s_c['label']} "
                   f"({s_c['record_count']} 条记录, 内聚度 {s_c['coherence']:.2f})")

    click.echo(f"\n  📊 数据保存在: {tmp_dir}（可手动删除）")
    click.echo(f"  💡 下次演示: hermes demo --user {user}")

    import shutil
    shutil.rmtree(tmp_dir, ignore_errors=True)


# ═══════════════════════════════════════════════════════════════
# hermes record — 写入训练样本
# ═══════════════════════════════════════════════════════════════

@cli.command()
@click.option("--user", "-u", required=True, help="用户 ID")
@click.option("--scope-desc", required=True, help="场景描述")
@click.option("--dimensions", required=True, help='JSON: [{"key":"language","value":"TS"}]')
@click.option("--source-conv", default="", help="来源会话 ID")
@click.option("--source-agent", default="cli", help="来源 agent ID")
def record(user, scope_desc, dimensions, source_conv, source_agent):
    """写入一条训练样本。"""
    try:
        dims = json.loads(dimensions)
    except json.JSONDecodeError:
        _echo_json({"status": "error", "reason": "Invalid dimensions JSON"})
        sys.exit(1)

    client = HermesClient(user_id=user, agent_id=source_agent)
    result = client.record(scope_desc, dims, source_conv=source_conv)
    _echo_json(result)


# ═══════════════════════════════════════════════════════════════
# hermes refine — 调整场景粒度
# ═══════════════════════════════════════════════════════════════

@cli.command()
@click.option("--user", "-u", required=True, help="用户 ID")
@click.option("--id", "record_id", required=True, help="记录 ID")
@click.option("--scope-desc", required=True, help="新的场景描述")
@click.option("--direction", type=click.Choice(["narrow", "broaden"]), required=True)
def refine(user, record_id, scope_desc, direction):
    """调整记录的场景粒度。"""
    from hermes_core.embedder import Embedder
    embedder = Embedder()
    result = refine_scene(user, record_id, scope_desc, direction, embedder)
    _echo_json(result)


# ═══════════════════════════════════════════════════════════════
# hermes query — 场景识别 + 偏好查询
# ═══════════════════════════════════════════════════════════════

@cli.command()
@click.option("--user", "-u", required=True, help="用户 ID")
@click.option("--text", "-t", required=True, help="用户输入文本")
def query(user, text):
    """场景识别 + 偏好查询。"""
    client = HermesClient(user_id=user, agent_id="cli")
    result = client.query(text)

    output = {
        "matched_scope": None,
        "active_loras": [],
        "related_preferences": [],
        "training_outdated": result.training_outdated,
    }

    if result.matched_scope:
        output["matched_scope"] = {
            "scope_id": result.matched_scope.scope_id,
            "scope_label": result.matched_scope.scope_label,
            "confidence": round(result.matched_scope.confidence, 4),
        }
        if result.alternative_scopes:
            output["alternative_scopes"] = [
                {"scope_id": s.scope_id, "scope_label": s.scope_label,
                 "confidence": round(s.confidence, 4)}
                for s in result.alternative_scopes[:3]
            ]

    output["active_loras"] = [
        {"scope_id": l.scope_id, "version": l.version, "priority": l.priority}
        for l in result.active_loras
    ]

    output["related_preferences"] = [
        {"key": p.key, "value": p.value, "source": p.source}
        for p in result.related_preferences
    ]

    _echo_json(output)


# ═══════════════════════════════════════════════════════════════
# hermes review — 训练集审核
# ═══════════════════════════════════════════════════════════════

@cli.group()
def review():
    """训练集审核。"""


@review.command("pending")
@click.option("--user", "-u", required=True, help="用户 ID")
@click.option("--scope", "scope_id", default=None, help="按 scope 过滤")
def review_pending(user, scope_id):
    """列出待审核记录。"""
    conn = init_db(user)
    if scope_id:
        records = get_active_records(conn, scope_id)
    else:
        from hermes_core.db import get_active_scopes
        scopes = get_active_scopes(conn)
        records = []
        for s in scopes:
            records.extend(get_active_records(conn, s.id))
    conn.close()

    click.echo(json.dumps([
        {
            "id": r.id, "scope_id": r.scope_id, "scope_label": r.scope_label,
            "dimensions": [{"key": d.key, "value": d.value} for d in r.dimensions],
            "confidence": r.confidence, "occurrences": r.occurrences,
        }
        for r in records
    ], ensure_ascii=False, indent=2))


@review.command("accept")
@click.option("--user", "-u", required=True, help="用户 ID")
@click.argument("record_ids", nargs=-1)
def review_accept(user, record_ids):
    """批量通过记录。"""
    conn = init_db(user)
    for rid in record_ids:
        update_record_state(conn, rid, RecordState.active)
    conn.close()
    _echo_json({"status": "accepted", "count": len(record_ids)})


@review.command("reject")
@click.option("--user", "-u", required=True, help="用户 ID")
@click.option("--reason", default="", help="拒绝原因")
@click.argument("record_ids", nargs=-1)
def review_reject(user, reason, record_ids):
    """批量拒绝记录。"""
    conn = init_db(user)
    for rid in record_ids:
        update_record_state(conn, rid, RecordState.rejected)
    conn.close()
    _echo_json({"status": "rejected", "count": len(record_ids), "reason": reason})


# ═══════════════════════════════════════════════════════════════
# hermes train-status / train — 训练管理
# ═══════════════════════════════════════════════════════════════

@cli.command("train-status")
@click.option("--user", "-u", required=True, help="用户 ID")
@click.option("--scope", "scope_id", default=None, help="scope ID")
def train_status(user, scope_id):
    """查询训练任务状态。"""
    conn = init_db(user)
    if scope_id:
        rows = conn.execute(
            "SELECT * FROM training_runs WHERE scope_id=? ORDER BY version DESC LIMIT 3",
            (scope_id,)
        ).fetchall()
    else:
        rows = conn.execute(
            "SELECT * FROM training_runs ORDER BY started_at DESC LIMIT 10"
        ).fetchall()
    conn.close()

    click.echo(json.dumps([
        {"id": r["id"], "scope_id": r["scope_id"], "version": r["version"],
         "status": r["status"], "started_at": r["started_at"] or "N/A",
         "finished_at": r["finished_at"] or "N/A"}
        for r in rows
    ], ensure_ascii=False, indent=2))


@cli.command("train")
@click.option("--user", "-u", required=True, help="用户 ID")
@click.option("--scope", "scope_id", required=True, help="scope ID")
def train(user, scope_id):
    """手动触发训练。"""
    _echo_json({
        "status": "queued",
        "message": f"Training for {scope_id} queued. Use 'train-status' to check progress."
    })


# ═══════════════════════════════════════════════════════════════
# hermes config — 查看/修改配置
# ═══════════════════════════════════════════════════════════════

@cli.group()
def config_cmd():
    """查看和修改配置。"""
    pass


@config_cmd.command("show")
def config_show():
    """显示当前配置。"""
    config = get_config()
    _echo_json(config.to_dict())


@config_cmd.command("set")
@click.argument("key")
@click.argument("value")
def config_set(key, value):
    """修改配置项。例如: hermes config set match_threshold 0.65"""
    config = get_config()
    if key not in HermesConfig.__dataclass_fields__:
        click.echo(f"未知配置项: {key}")
        click.echo(f"可用配置项: {', '.join(HermesConfig.__dataclass_fields__.keys())}")
        sys.exit(1)
    field_type = type(getattr(config, key))
    try:
        setattr(config, key, field_type(value))
    except (ValueError, TypeError) as e:
        click.echo(f"值类型错误: {e}")
        sys.exit(1)
    save_config(config)
    click.echo(f"✅ {key} = {getattr(config, key)}")


# ═══════════════════════════════════════════════════════════════
# hermes daemon — 启动/停止（兼容旧接口）
# ═══════════════════════════════════════════════════════════════

@cli.command("daemon")
@click.option("--foreground", "-f", is_flag=True, help="前台运行模式")
def daemon(foreground):
    """启动 Daemon（前台），建议用 hermes start 后台运行。"""
    if foreground:
        from daemon.daemon import main as daemon_main
        click.echo("Hermes Daemon 前台运行中 (Ctrl+C 停止)")
        daemon_main()
    else:
        click.echo("请用 hermes start 后台启动，或 hermes daemon --foreground 前台运行")


if __name__ == "__main__":
    cli()