"""B01_Dashboard aiomysql Raw SQL 저장소."""

from __future__ import annotations

import shutil
from datetime import datetime, timedelta
from typing import Any

import aiomysql

from config.config_db import get_db_pool


def _role(value: str | None) -> str:
    return {"MASTER": "ADMIN", "MEMBER": "USER"}.get(value or "USER", value or "USER")


def _stage_from_status(status: str | None) -> tuple[int, int]:
    order = [
        ("FILE_UPLOADED", 1),
        ("WF1", 2),
        ("WF2", 3),
        ("WF3", 4),
        ("WF4", 5),
        ("WF5", 6),
        ("WF6", 7),
        ("DONE", 7),
        ("CONFIRMED", 7),
    ]
    value = status or "NEW"
    stage = 0
    for token, idx in order:
        if token in value:
            stage = max(stage, idx)
    return stage, round(stage / 7 * 100)


def _project_row(row: dict[str, Any]) -> dict[str, Any]:
    stage, progress = _stage_from_status(row.get("status"))
    return {**row, "workflow_stage": stage, "progress_percent": progress}


async def get_dashboard_me(user_id: int) -> dict[str, Any] | None:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT u.id, u.email, u.name, u.position, u.department, u.phone,
                      u.company_id, u.role, u.is_master, u.status, u.last_login,
                      u.auth_expires_at, c.name AS company_name
               FROM users u LEFT JOIN companies c ON c.id = u.company_id
               WHERE u.id = %s AND u.deleted_at IS NULL""",
            (user_id,),
        )
        row = await cursor.fetchone()
        if row:
            row["role"] = _role(row.get("role"))
            row["is_master"] = bool(row.get("is_master"))
        return row


async def update_user_profile(user_id: int, data: dict[str, Any]) -> dict[str, Any] | None:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        await cursor.execute(
            """UPDATE users SET name = %s, position = %s, department = %s, phone = %s
               WHERE id = %s AND deleted_at IS NULL""",
            (
                data["name"],
                data.get("position"),
                data.get("department"),
                data.get("phone"),
                user_id,
            ),
        )
        await connection.commit()
    return await get_dashboard_me(user_id)


async def list_user_projects(user_id: int) -> list[dict[str, Any]]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT id, name, region, status, updated_at, created_at
               FROM projects WHERE user_id = %s AND deleted_at IS NULL
               ORDER BY updated_at DESC, created_at DESC""",
            (user_id,),
        )
        return [_project_row(row) for row in await cursor.fetchall()]


async def list_company_projects(company_id: int) -> list[dict[str, Any]]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT p.id, p.name, p.region, p.status, p.updated_at, p.created_at,
                      u.name AS owner_name, u.email AS owner_email
               FROM projects p LEFT JOIN users u ON u.id = p.user_id
               WHERE p.company_id = %s AND p.deleted_at IS NULL
               ORDER BY p.updated_at DESC, p.created_at DESC""",
            (company_id,),
        )
        return [_project_row(row) for row in await cursor.fetchall()]


async def get_user_company(company_id: int | None) -> dict[str, Any] | None:
    if company_id is None:
        return None
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT c.id, c.name, c.business_registration_number, c.business_address,
                      c.business_owner, c.business_status,
                      COUNT(DISTINCT u.id) AS user_count,
                      COUNT(DISTINCT p.id) AS project_count
               FROM companies c
               LEFT JOIN users u ON u.company_id = c.id AND u.deleted_at IS NULL
               LEFT JOIN projects p ON p.company_id = c.id AND p.deleted_at IS NULL
               WHERE c.id = %s AND c.deleted_at IS NULL
               GROUP BY c.id""",
            (company_id,),
        )
        return await cursor.fetchone()


async def search_companies(query: str) -> list[dict[str, Any]]:
    pool = get_db_pool()
    pattern = f"%{query}%"
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT id, name, business_registration_number, business_status
               FROM companies
               WHERE deleted_at IS NULL AND (name LIKE %s OR business_registration_number LIKE %s)
               ORDER BY name LIMIT 20""",
            (pattern, pattern),
        )
        return list(await cursor.fetchall())


async def create_company(user_id: int, data: dict[str, Any]) -> dict[str, Any]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        try:
            await connection.begin()
            await cursor.execute(
                """INSERT INTO companies
                   (name, business_registration_number, business_address, business_owner,
                    business_status, master_user_id, created_by, status)
                   VALUES (%s, %s, %s, %s, '활동중', %s, %s, 'ACTIVE')""",
                (
                    data["name"],
                    data["business_registration_number"],
                    data.get("business_address"),
                    data.get("business_owner"),
                    user_id,
                    user_id,
                ),
            )
            company_id = cursor.lastrowid
            await cursor.execute(
                """UPDATE users
                   SET company_id = %s, role = 'ADMIN', is_master = TRUE,
                      status = 'ACTIVE',
                      auth_expires_at = DATE_ADD(CURRENT_TIMESTAMP, INTERVAL 3 MONTH)
                   WHERE id = %s""",
                (company_id, user_id),
            )
            await cursor.execute(
                """INSERT INTO system_audit_logs (user_id, action, resource_type, resource_id)
                   VALUES (%s, 'COMPANY_CREATE', 'company', %s)""",
                (user_id, company_id),
            )
            await connection.commit()
            return {"company_id": company_id, "status": "ACTIVE"}
        except Exception:
            await connection.rollback()
            raise


async def join_company(user_id: int, company_id: int) -> dict[str, Any]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        try:
            await connection.begin()
            await cursor.execute(
                """INSERT INTO join_requests (user_id, company_id, status)
                   VALUES (%s, %s, 'PENDING')
                   ON DUPLICATE KEY UPDATE status = 'PENDING', requested_at = CURRENT_TIMESTAMP,
                     reviewed_by = NULL, reviewed_at = NULL""",
                (user_id, company_id),
            )
            request_id = cursor.lastrowid
            await cursor.execute(
                "UPDATE users SET status = 'PENDING', company_id = NULL WHERE id = %s", (user_id,)
            )
            await connection.commit()
            return {"join_request_id": request_id, "status": "PENDING"}
        except Exception:
            await connection.rollback()
            raise


async def list_company_members(company_id: int) -> list[dict[str, Any]]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT id, email, name, position, department, role, is_master, status
               FROM users WHERE company_id = %s AND deleted_at IS NULL ORDER BY name, email""",
            (company_id,),
        )
        rows = list(await cursor.fetchall())
        for row in rows:
            row["role"] = _role(row.get("role"))
            row["is_master"] = bool(row.get("is_master"))
        return rows


async def add_company_member(company_id: int, email: str) -> dict[str, Any] | None:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await connection.begin()
        await cursor.execute(
            """SELECT id, company_id FROM users
               WHERE email = %s AND deleted_at IS NULL FOR UPDATE""",
            (email.lower(),),
        )
        user = await cursor.fetchone()
        if not user or user["company_id"] == company_id:
            await connection.rollback()
            return None
        await cursor.execute(
            """UPDATE users SET company_id = %s, status = 'ACTIVE', role = 'USER',
                      is_master = FALSE
               WHERE id = %s""",
            (company_id, user["id"]),
        )
        await connection.commit()
    return await get_dashboard_me(user["id"])


async def remove_company_member(company_id: int, user_id: int) -> bool:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        await cursor.execute(
            """UPDATE users SET company_id = NULL, status = 'NO_COMPANY', role = 'USER',
                      is_master = FALSE
               WHERE id = %s AND company_id = %s AND is_master = FALSE""",
            (user_id, company_id),
        )
        changed = cursor.rowcount > 0
        await connection.commit()
        return changed


async def list_join_requests(company_id: int | None = None) -> list[dict[str, Any]]:
    where = "WHERE jr.company_id = %s" if company_id else ""
    params = (company_id,) if company_id else ()
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            f"""SELECT jr.id, jr.user_id, jr.company_id, jr.requested_at, jr.status,
                       u.email AS user_email, u.name AS user_name, c.name AS company_name
                FROM join_requests jr
                JOIN users u ON u.id = jr.user_id
                JOIN companies c ON c.id = jr.company_id
                {where}
                ORDER BY jr.requested_at DESC LIMIT 100""",
            params,
        )
        return list(await cursor.fetchall())


async def process_join_request(
    request_id: int, reviewer_id: int, approved: bool, company_id: int | None = None
) -> bool:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await connection.begin()
        where = "id = %s AND status = 'PENDING'"
        params: tuple[Any, ...] = (request_id,)
        if company_id is not None:
            where += " AND company_id = %s"
            params = (request_id, company_id)
        await cursor.execute(f"SELECT * FROM join_requests WHERE {where} FOR UPDATE", params)
        row = await cursor.fetchone()
        if not row:
            await connection.rollback()
            return False
        status = "APPROVED" if approved else "REJECTED"
        await cursor.execute(
            """UPDATE join_requests SET status = %s, reviewed_by = %s,
                      reviewed_at = CURRENT_TIMESTAMP WHERE id = %s""",
            (status, reviewer_id, request_id),
        )
        if approved:
            await cursor.execute(
                """UPDATE users SET company_id = %s, status = 'ACTIVE'
                   WHERE id = %s""",
                (row["company_id"], row["user_id"]),
            )
        else:
            await cursor.execute(
                "UPDATE users SET status = 'REJECTED' WHERE id = %s", (row["user_id"],)
            )
        await connection.commit()
        return True


async def list_all_companies() -> list[dict[str, Any]]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT c.id, c.name, c.business_registration_number, c.business_status,
                      c.created_at, COUNT(DISTINCT u.id) AS user_count,
                      COUNT(DISTINCT p.id) AS project_count
               FROM companies c
               LEFT JOIN users u ON u.company_id = c.id AND u.deleted_at IS NULL
               LEFT JOIN projects p ON p.company_id = c.id AND p.deleted_at IS NULL
               WHERE c.deleted_at IS NULL GROUP BY c.id ORDER BY c.created_at DESC"""
        )
        return list(await cursor.fetchall())


async def list_all_users() -> list[dict[str, Any]]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT u.id, u.email, u.name, u.role, u.status, u.company_id,
                      c.name AS company_name, u.last_login
               FROM users u LEFT JOIN companies c ON c.id = u.company_id
               WHERE u.deleted_at IS NULL ORDER BY u.created_at DESC LIMIT 200"""
        )
        rows = list(await cursor.fetchall())
        for row in rows:
            row["role"] = _role(row.get("role"))
        return rows


async def change_user_role(user_id: int, role: str) -> bool:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        await cursor.execute("UPDATE users SET role = %s WHERE id = %s", (role, user_id))
        changed = cursor.rowcount > 0
        await connection.commit()
        return changed


async def assign_user_company(user_id: int, company_id: int | None) -> bool:
    status = "ACTIVE" if company_id else "NO_COMPANY"
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor() as cursor:
        await cursor.execute(
            "UPDATE users SET company_id = %s, status = %s WHERE id = %s",
            (company_id, status, user_id),
        )
        changed = cursor.rowcount > 0
        await connection.commit()
        return changed


async def list_audit_logs(limit: int, offset: int) -> dict[str, Any]:
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute("SELECT COUNT(*) AS total FROM system_audit_logs")
        total = (await cursor.fetchone())["total"]
        await cursor.execute(
            """SELECT l.id, l.user_id, u.email, l.action, l.resource_type,
                      l.resource_id, l.timestamp
               FROM system_audit_logs l LEFT JOIN users u ON u.id = l.user_id
               ORDER BY l.timestamp DESC LIMIT %s OFFSET %s""",
            (limit, offset),
        )
        return {"total": total, "items": list(await cursor.fetchall())}


async def get_system_resources() -> dict[str, Any]:
    total, used, _free = shutil.disk_usage(".")
    disk_percent = used / total * 100 if total else 0
    pool = get_db_pool()
    async with pool.acquire() as connection, connection.cursor(aiomysql.DictCursor) as cursor:
        await cursor.execute(
            """SELECT
                 (SELECT COUNT(*) FROM sessions
                    WHERE expires_at > CURRENT_TIMESTAMP) AS active_user_count,
                 (SELECT COUNT(*) FROM projects WHERE deleted_at IS NULL) AS active_project_count"""
        )
        stats = await cursor.fetchone()
        current = {
            "cpu_usage_percent": None,
            "memory_usage_percent": None,
            "disk_usage_percent": round(disk_percent, 2),
            "active_user_count": stats["active_user_count"],
            "active_project_count": stats["active_project_count"],
            "total_storage_mb": round(used / 1024 / 1024, 2),
        }
        await cursor.execute(
            """SELECT timestamp, cpu_usage_percent, memory_usage_percent, disk_usage_percent,
                      active_user_count, active_project_count, total_storage_mb
               FROM system_resources
               WHERE timestamp >= %s ORDER BY timestamp""",
            (datetime.utcnow() - timedelta(hours=24),),
        )
        return {"current": current, "history": list(await cursor.fetchall()), "stats": current}