from __future__ import annotations

import sqlite3

from backend.database.migrations.runner import Migration


def upgrade(connection: sqlite3.Connection) -> None:
    connection.execute("ALTER TABLE watchlist_entries ADD COLUMN remark TEXT NOT NULL DEFAULT ''")
    statements = (
        """
        CREATE TABLE review_notes (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
            code TEXT NOT NULL DEFAULT '',
            stock_name TEXT NOT NULL DEFAULT '',
            trade_date TEXT NOT NULL,
            summary TEXT NOT NULL DEFAULT '',
            content TEXT NOT NULL DEFAULT '',
            plan TEXT NOT NULL DEFAULT '',
            created_at TEXT NOT NULL,
            updated_at TEXT NOT NULL,
            UNIQUE(user_id, code, trade_date)
        )
        """,
        """
        CREATE TABLE trade_entries (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
            trade_date TEXT NOT NULL,
            code TEXT NOT NULL,
            name TEXT NOT NULL,
            action TEXT NOT NULL CHECK (action IN ('buy','sell','add','trim','watch')),
            price REAL NOT NULL CHECK (price >= 0),
            quantity INTEGER NOT NULL DEFAULT 0 CHECK (quantity >= 0),
            position_pct REAL CHECK (position_pct BETWEEN 0 AND 100),
            pnl_amount REAL,
            pnl_pct REAL,
            emotion TEXT NOT NULL CHECK (
                emotion IN ('calm','confident','hesitant','anxious','impulsive')
            ),
            tags_json TEXT NOT NULL DEFAULT '[]',
            thesis TEXT NOT NULL DEFAULT '',
            execution TEXT NOT NULL DEFAULT '',
            created_at TEXT NOT NULL,
            updated_at TEXT NOT NULL
        )
        """,
        """
        CREATE INDEX trade_entries_user_date_idx
        ON trade_entries(user_id, trade_date DESC, id DESC)
        """,
        """
        CREATE TABLE alerts (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
            kind TEXT NOT NULL CHECK (kind IN ('manual','strategy_t1','strategy_t5')),
            title TEXT NOT NULL,
            content TEXT NOT NULL DEFAULT '',
            available_date TEXT NOT NULL,
            code TEXT NOT NULL DEFAULT '',
            dedupe_key TEXT NOT NULL,
            is_read INTEGER NOT NULL DEFAULT 0 CHECK (is_read IN (0,1)),
            read_at TEXT,
            created_at TEXT NOT NULL,
            updated_at TEXT NOT NULL,
            UNIQUE(user_id, dedupe_key)
        )
        """,
        """
        CREATE INDEX alerts_user_due_idx
        ON alerts(user_id, available_date, is_read, id DESC)
        """,
        """
        CREATE TABLE review_assistant_messages (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
            role TEXT NOT NULL CHECK (role IN ('user','assistant')),
            content TEXT NOT NULL,
            context_date TEXT NOT NULL,
            request_id TEXT REFERENCES llm_requests(id) ON DELETE SET NULL,
            status TEXT NOT NULL CHECK (status IN ('complete','stopped','error')),
            created_at TEXT NOT NULL
        )
        """,
        """
        CREATE INDEX review_assistant_user_idx
        ON review_assistant_messages(user_id, id DESC)
        """,
    )
    for statement in statements:
        connection.execute(statement)


def downgrade(connection: sqlite3.Connection) -> None:
    for table in (
        "review_assistant_messages",
        "alerts",
        "trade_entries",
        "review_notes",
    ):
        connection.execute(f"DROP TABLE {table}")
    connection.execute("ALTER TABLE watchlist_entries DROP COLUMN remark")


MIGRATION = Migration(
    version=10,
    name="create_private_review_domain",
    signature="review:v1:notes-trades-alerts-assistant",
    upgrade=upgrade,
    downgrade=downgrade,
)