From 88b59d5d9b8e34fd05c66bbf34a876af96cd8a12 Mon Sep 17 00:00:00 2001
From: itsjoxdev <itsjoxdev@gmail.com>
Date: Fri, 24 Jul 2026 17:39:49 +0300
Subject: [PATCH] feat(api): complete backend foundation

---
 apps/api/alembic.ini                          | 38 +++++++++-
 apps/api/core/config/settings.py              | 26 ++++++-
 apps/api/infrastructure/db/base.py            |  5 +-
 apps/api/infrastructure/db/migrations/env.py  | 70 +++++++++++++++++++
 .../db/migrations/script.py.mako              | 26 +++++++
 apps/api/infrastructure/db/session.py         | 22 +++++-
 apps/api/pyproject.toml                       | 11 +++
 apps/api/requirements/base.txt                |  2 +-
 8 files changed, 194 insertions(+), 6 deletions(-)
 create mode 100644 apps/api/infrastructure/db/migrations/env.py
 create mode 100644 apps/api/infrastructure/db/migrations/script.py.mako

diff --git a/apps/api/alembic.ini b/apps/api/alembic.ini
index a5cc207..9782425 100644
--- a/apps/api/alembic.ini
+++ b/apps/api/alembic.ini
@@ -1,4 +1,38 @@
-# Alembic configuration
 [alembic]
 script_location = infrastructure/db/migrations
-# TODO: Configure Alembic settings
+prepend_sys_path = .
+version_path_separator = os
+
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
diff --git a/apps/api/core/config/settings.py b/apps/api/core/config/settings.py
index c997b57..4704f75 100644
--- a/apps/api/core/config/settings.py
+++ b/apps/api/core/config/settings.py
@@ -1 +1,25 @@
-# TODO: Implement configuration settings using Pydantic BaseSettings
+from pydantic import Field
+from pydantic_settings import BaseSettings, SettingsConfigDict
+import os
+
+# Ensure the .env file from the project root is targeted
+ENV_PATH = os.path.abspath(os.path.join(os.path.dirname(__file__), "../../../../.env"))
+
+class Settings(BaseSettings):
+    APP_NAME: str = "TicketFlow"
+    APP_ENV: str = "development"
+    DEBUG: bool = Field(default=True, alias="APP_DEBUG")
+    DATABASE_URL: str
+    SECRET_KEY: str = Field(alias="JWT_SECRET_KEY")
+    ALGORITHM: str = Field(default="HS256", alias="JWT_ALGORITHM")
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+    REFRESH_TOKEN_EXPIRE_DAYS: int = 7
+    CORS_ORIGINS: list[str] | str = ["*"]
+
+    model_config = SettingsConfigDict(
+        env_file=ENV_PATH,
+        env_file_encoding="utf-8",
+        extra="ignore"
+    )
+
+settings = Settings()
diff --git a/apps/api/infrastructure/db/base.py b/apps/api/infrastructure/db/base.py
index dcd041b..f75ec44 100644
--- a/apps/api/infrastructure/db/base.py
+++ b/apps/api/infrastructure/db/base.py
@@ -1 +1,4 @@
-# TODO: Define declarative base for SQLAlchemy
+from sqlalchemy.orm import DeclarativeBase
+
+class Base(DeclarativeBase):
+    pass
diff --git a/apps/api/infrastructure/db/migrations/env.py b/apps/api/infrastructure/db/migrations/env.py
new file mode 100644
index 0000000..0eac8e2
--- /dev/null
+++ b/apps/api/infrastructure/db/migrations/env.py
@@ -0,0 +1,70 @@
+import asyncio
+import sys
+import os
+from logging.config import fileConfig
+
+from sqlalchemy.ext.asyncio import async_engine_from_config
+from sqlalchemy import pool
+from alembic import context
+
+# Add project root to sys.path so apps.api imports work
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "../../../../..")))
+
+# pyrefly: ignore [missing-import]
+from apps.api.core.config.settings import settings
+# pyrefly: ignore [missing-import]
+from apps.api.infrastructure.db.base import Base
+
+config = context.config
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+def get_url():
+    return settings.DATABASE_URL
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode."""
+    url = get_url()
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+def do_run_migrations(connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+async def run_async_migrations() -> None:
+    """In this scenario we need to create an Engine
+    and associate a connection with the context.
+    """
+    configuration = config.get_section(config.config_ini_section)
+    configuration["sqlalchemy.url"] = get_url()
+    connectable = async_engine_from_config(
+        configuration,
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+
+    await connectable.dispose()
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode."""
+    asyncio.run(run_async_migrations())
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
diff --git a/apps/api/infrastructure/db/migrations/script.py.mako b/apps/api/infrastructure/db/migrations/script.py.mako
new file mode 100644
index 0000000..fbc4b07
--- /dev/null
+++ b/apps/api/infrastructure/db/migrations/script.py.mako
@@ -0,0 +1,26 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}
diff --git a/apps/api/infrastructure/db/session.py b/apps/api/infrastructure/db/session.py
index 1ef32ce..1d36543 100644
--- a/apps/api/infrastructure/db/session.py
+++ b/apps/api/infrastructure/db/session.py
@@ -1 +1,21 @@
-# TODO: Configure database session maker
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from typing import AsyncGenerator
+from apps.api.core.config.settings import settings
+
+engine = create_async_engine(
+    settings.DATABASE_URL,
+    echo=settings.DEBUG,
+    future=True,
+)
+
+SessionLocal = async_sessionmaker(
+    bind=engine,
+    class_=AsyncSession,
+    expire_on_commit=False,
+    autoflush=False,
+    autocommit=False,
+)
+
+async def get_db() -> AsyncGenerator[AsyncSession, None]:
+    async with SessionLocal() as session:
+        yield session
diff --git a/apps/api/pyproject.toml b/apps/api/pyproject.toml
index 0533444..dc728ac 100644
--- a/apps/api/pyproject.toml
+++ b/apps/api/pyproject.toml
@@ -4,6 +4,17 @@ version = "0.1.0"
 description = "TicketFlow Backend API"
 authors = ["itsjoxdev"]
 
+[tool.poetry.dependencies]
+python = "^3.12"
+fastapi = "*"
+pydantic = "*"
+pydantic-settings = "*"
+sqlalchemy = "*"
+alembic = "*"
+asyncpg = "*"
+python-jose = {extras = ["cryptography"], version = "*"}
+passlib = {extras = ["bcrypt"], version = "*"}
+
 # TODO: Add build dependencies
 [build-system]
 requires = ["poetry-core>=1.0.0"]
diff --git a/apps/api/requirements/base.txt b/apps/api/requirements/base.txt
index c664f93..47f3ad2 100644
--- a/apps/api/requirements/base.txt
+++ b/apps/api/requirements/base.txt
@@ -1,9 +1,9 @@
 # Base dependencies
 fastapi
 pydantic
+pydantic-settings
 sqlalchemy
 alembic
 asyncpg
 python-jose[cryptography]
 passlib[bcrypt]
-# TODO: Add additional base dependencies