"""V2 API routes - Enhanced implementation with structured results."""
from __future__ import annotations

import time
from flask import Blueprint, jsonify, request
from concurrent.futures import ThreadPoolExecutor

from lawrisk.services.lawrisk_v2_service import search_v2, list_regions
from lawrisk.services.licensing_repo import (
    list_permits_for_region,
    load_permits_and_risks,
    list_region_theme_options,
    load_theme_payload,
    create_checkpoint,
    list_checkpoints,
    restore_checkpoint,
    delete_checkpoint,
)
from lawrisk.services.lawrisk_service import suggest_questions_embed

v2_bp = Blueprint('lawrisk_v2', __name__, url_prefix='/fs-ai-asistant/api/workflow/lawrisk')


@v2_bp.route('/v2', methods=['POST', 'GET'])
def lawrisk_search_v2():
    """V2 search endpoint with structured results."""
    query, debug_flag, top_k_int, _mode, region_filter = _extract_params()

    if not query or not isinstance(query, str):
        return jsonify({"error": "query is required"}), 400

    try:
        t0 = time.time()
        with ThreadPoolExecutor(max_workers=2) as ex:
            fut_subject = ex.submit(search_v2, query, debug_flag, region_filter)
            fut_questions = ex.submit(suggest_questions_embed, query, max(1, top_k_int))

            result_v2 = fut_subject.result()
            rec_questions = fut_questions.result() or []

        risk_subject = result_v2.get("risk_subject", []) if isinstance(result_v2, dict) else []
        found = bool(risk_subject)
        exec_time = int((time.time() - t0) * 1000)

        data = {
            "llmRespond": "" if found else "抱歉，无法检索到相关答案",
            "lawRisk": "",
            "questionExtend": rec_questions,
            "conversationId": "",
            "messageId": "",
            "roundNumber": 0,
            "conversationInfo": {},
            "knowledgeSources": [],
            "totalKnowledgeSources": 0,
            "executionTime": exec_time,
            "workflowStatus": "ok" if found else "no_match",
            "executionSteps": [],
            "costStatistics": {},
            "workflowTrackingId": "",
            "risk_subject": risk_subject,
            "debug": result_v2.get("debug", {}) if (debug_flag and isinstance(result_v2, dict)) else {},
        }
        resp = {"success": True, "message": "OK", "data": data}
        return jsonify(resp)
    except Exception as e:
        print(f"lawrisk_search_v2 error: {e}")
        return jsonify({"success": False, "message": str(e), "data": {}}), 500


@v2_bp.route('/v2/regions', methods=['GET'])
def lawrisk_regions():
    """Get list of available regions."""
    try:
        regions = list_regions()
        return jsonify({"success": True, "data": {"regions": regions}})
    except Exception as exc:
        print(f"lawrisk_regions error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


@v2_bp.route('/getPermits', methods=['GET', 'POST'])
def lawrisk_get_permits():
    """Get permits for a specific region."""
    if request.method == "GET":
        region_value = request.args.get("region") or request.args.get("region_id")
    else:
        if request.is_json:
            payload = request.get_json(silent=True) or {}
        else:
            payload = request.form.to_dict(flat=True) if request.form else {}
        region_value = payload.get("region") or payload.get("region_id")

    if not region_value or (isinstance(region_value, str) and not region_value.strip()):
        return jsonify({"success": False, "message": "region is required", "data": {}}), 400

    region_token = region_value.strip() if isinstance(region_value, str) else str(region_value)

    try:
        permits = list_permits_for_region(region_token)
        return jsonify({"success": True, "data": {"region": region_token, "permits": permits}})
    except Exception as exc:
        print(f"lawrisk_get_permits error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


def _extract_params():
    """Extract parameters from request."""
    if request.method == "GET":
        query = request.args.get("query") or request.args.get("q") or request.args.get("text")
        debug_flag = request.args.get("debug") in {"1", "true", "yes", "on"}
        top_k = request.args.get("top")
        try:
            top_k_int = int(top_k) if top_k else 5
        except Exception:
            top_k_int = 5
        mode_value = (request.args.get("mode") or "llm").lower()
        region_value = request.args.get("region") or request.args.get("region_id")
        region_list = request.args.getlist("region")
        if region_list and (not region_value or len(region_list) > 1):
            region_value = region_list
    else:
        if request.is_json:
            payload = request.get_json(silent=True) or {}
        else:
            payload = request.form.to_dict(flat=True) if request.form else {}

        query = payload.get("query") or payload.get("q") or payload.get("text")
        debug_flag = str(payload.get("debug", "")).strip().lower() in {"1", "true", "yes", "on"}
        try:
            top_k_int = int(payload.get("top", 5))
        except Exception:
            top_k_int = 5
        mode_value = str(payload.get("mode", "llm")).lower()
        region_value = payload.get("region") or payload.get("region_id")

    return query, debug_flag, top_k_int, mode_value, region_value


@v2_bp.route('/admin/test', methods=['GET'])
def admin_test():
    """Simple test route."""
    return jsonify({"success": True, "message": "Test route works!"})


@v2_bp.route('/test-simple', methods=['GET'])
def test_simple():
    """Very simple test."""
    return jsonify({"status": "ok"})


@v2_bp.route('/admin/regions', methods=['GET'])
def admin_regions():
    """Get all regions for database maintenance."""
    try:
        regions = list_regions()
        return jsonify({"success": True, "data": {"regions": regions}})
    except Exception as exc:
        print(f"admin_regions error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


@v2_bp.route('/admin/themes', methods=['GET'])
def admin_themes():
    """Get themes for a specific region."""
    region_value = request.args.get("region") or request.args.get("region_id")

    if not region_value or (isinstance(region_value, str) and not region_value.strip()):
        return jsonify({"success": False, "message": "region is required", "data": {}}), 400

    region_token = region_value.strip() if isinstance(region_value, str) else str(region_value)

    try:
        catalog = list_region_theme_options()
        region_id_lower = region_token.lower()

        themes = []
        seen_theme_ids = set()

        for item in catalog:
            if (item["region_id"] == region_token or
                item["region_id"].lower() == region_id_lower or
                item["region_name"].lower() == region_id_lower):
                theme_id = item["theme_id"]
                if theme_id not in seen_theme_ids:
                    seen_theme_ids.add(theme_id)
                    themes.append({
                        "id": theme_id,
                        "name": item["theme_name"],
                        "option_id": item["option_id"]
                    })

        return jsonify({"success": True, "data": {"region": region_token, "themes": themes}})
    except Exception as exc:
        print(f"admin_themes error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


@v2_bp.route('/admin/permits', methods=['GET'])
def admin_permits():
    """Get permits for a specific region-theme combination."""
    region_value = request.args.get("region") or request.args.get("region_id")
    theme_value = request.args.get("theme") or request.args.get("theme_id")

    if not region_value or not theme_value:
        return jsonify({"success": False, "message": "region and theme are required", "data": {}}), 400

    region_token = region_value.strip() if isinstance(region_value, str) else str(region_value)
    theme_token = theme_value.strip() if isinstance(theme_value, str) else str(theme_value)

    try:
        permits = load_permits_and_risks(region_token, theme_token)

        return jsonify({
            "success": True,
            "data": {
                "region": region_token,
                "theme": theme_token,
                "permits": permits
            }
        })
    except Exception as exc:
        print(f"admin_permits error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


@v2_bp.route('/admin/permit-details', methods=['GET'])
def admin_permit_details():
    """Get detailed information for a specific permit."""
    region_value = request.args.get("region") or request.args.get("region_id")
    theme_value = request.args.get("theme") or request.args.get("theme_id")
    permit_value = request.args.get("permit") or request.args.get("permit_id")

    if not region_value or not theme_value or not permit_value:
        return jsonify({"success": False, "message": "region, theme, and permit are required", "data": {}}), 400

    region_token = region_value.strip() if isinstance(region_value, str) else str(region_value)
    theme_token = theme_value.strip() if isinstance(theme_value, str) else str(theme_value)
    permit_token = permit_value.strip() if isinstance(permit_value, str) else str(permit_value)

    try:
        permits = load_permits_and_risks(region_token, theme_token, permit_token)

        if not permits:
            return jsonify({"success": False, "message": "Permit not found", "data": {}}), 404

        return jsonify({
            "success": True,
            "data": {
                "region": region_token,
                "theme": theme_token,
                "permit": permits[0]
            }
        })
    except Exception as exc:
        print(f"admin_permit_details error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


@v2_bp.route('/admin/checkpoints', methods=['GET'])
def admin_list_checkpoints():
    """List all available checkpoints."""
    try:
        checkpoints = list_checkpoints()
        return jsonify({"success": True, "data": {"checkpoints": checkpoints}})
    except Exception as exc:
        print(f"admin_list_checkpoints error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


@v2_bp.route('/admin/checkpoints', methods=['POST'])
def admin_create_checkpoint():
    """Create a new checkpoint."""
    if request.is_json:
        payload = request.get_json(silent=True) or {}
    else:
        payload = request.form.to_dict(flat=True) if request.form else {}

    description = payload.get("description", "")

    try:
        checkpoint = create_checkpoint(description)
        return jsonify({"success": True, "data": checkpoint})
    except Exception as exc:
        print(f"admin_create_checkpoint error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500


@v2_bp.route('/admin/checkpoints/<checkpoint_id>/restore', methods=['POST'])
def admin_restore_checkpoint(checkpoint_id):
    """
    ⚠️ DANGEROUS OPERATION ⚠️

    恢复数据库从checkpoint。

    此操作将会:
    1. 永久删除当前数据库中的所有数据
    2. 从指定的checkpoint恢复数据
    3. 如果失败，可能导致数据丢失

    建议在生产环境中:
    - 确保已创建最新备份
    - 在低峰期操作
    - 启用自动备份功能 (create_auto_backup=true)

    POST参数:
    - create_auto_backup: 是否在恢复前自动备份当前状态 (默认: true)
    - batch_size: 批量插入的批次大小，每批插入行数 (默认: 1000，范围: 100-10000)
    """
    import logging
    logger = logging.getLogger(__name__)
    logger.info("=" * 80)
    logger.info(f"[API] Received checkpoint restore request: {checkpoint_id}")
    logger.info("=" * 80)

    try:
        # 获取请求参数
        if request.is_json:
            payload = request.get_json(silent=True) or {}
        else:
            payload = request.form.to_dict(flat=True) if request.form else {}

        logger.info(f"[API] Request parameters: {payload}")

        # 默认启用自动备份
        create_auto_backup = str(payload.get("create_auto_backup", "true")).lower() in {"1", "true", "yes", "on"}
        logger.info(f"[API] Auto-backup enabled: {create_auto_backup}")

        # 解析批量大小参数
        try:
            batch_size = int(payload.get("batch_size", "1000"))
            if batch_size < 100 or batch_size > 10000:
                raise ValueError(f"batch_size must be between 100 and 10000, got {batch_size}")
        except (ValueError, TypeError) as e:
            logger.warning(f"[API] Invalid batch_size: {e}, using default 1000")
            batch_size = 1000

        logger.info(f"[API] Batch size: {batch_size} rows/batch")

        # 执行恢复
        logger.info(f"[API] Starting restore operation...")
        restore_result = restore_checkpoint(checkpoint_id, create_auto_backup=create_auto_backup, batch_size=batch_size)

        # 检查恢复状态
        if restore_result.get("status") == "success":
            logger.info(f"[API] Restore completed successfully")
            logger.info(f"[API] Tables restored: {restore_result['summary']['tables_restored']}")
            logger.info(f"[API] Total rows restored: {restore_result['summary']['total_rows_restored']}")

            return jsonify({
                "success": True,
                "message": restore_result["message"],
                "data": {
                    "checkpoint_id": restore_result["summary"]["checkpoint_id"],
                    "tables_restored": restore_result["summary"]["tables_restored"],
                    "total_rows": restore_result["summary"]["total_rows_restored"],
                    "auto_backup": restore_result["summary"].get("auto_backup"),
                    "table_details": restore_result["summary"]["table_details"]
                }
            })
        else:
            # 恢复失败
            logger.error(f"[API] Restore failed: {restore_result.get('message')}")
            errors = restore_result["summary"].get("errors", [])
            if errors:
                logger.error(f"[API] Errors encountered: {errors}")

            response_data = {
                "success": False,
                "message": restore_result["message"],
                "data": {
                    "errors": errors,
                    "auto_backup_available": restore_result.get("auto_backup_available", False)
                }
            }

            # 如果有自动备份，提供恢复建议
            if restore_result.get("recovery_suggestion"):
                logger.warning(f"[API] Recovery suggestion: {restore_result['recovery_suggestion']}")
                response_data["data"]["recovery_suggestion"] = restore_result["recovery_suggestion"]

            return jsonify(response_data), 500

    except Exception as exc:
        logger.error(f"[API] Restore operation failed with exception: {str(exc)}", exc_info=True)
        return jsonify({
            "success": False,
            "message": f"Restore failed: {str(exc)}",
            "data": {
                "error_type": type(exc).__name__,
                "auto_backup_available": None  # 未知，因为异常发生在备份之前
            }
        }), 500


@v2_bp.route('/admin/checkpoints/<checkpoint_id>', methods=['DELETE'])
def admin_delete_checkpoint(checkpoint_id):
    """Delete a checkpoint."""
    try:
        success = delete_checkpoint(checkpoint_id)
        if success:
            return jsonify({"success": True, "message": "Checkpoint deleted"})
        else:
            return jsonify({"success": False, "message": "Checkpoint not found"}), 404
    except Exception as exc:
        print(f"admin_delete_checkpoint error: {exc}")
        return jsonify({"success": False, "message": str(exc)}), 500