"""add saved ideas

Revision ID: 20260428_add_saved_ideas
Revises: 20260428_add_platform_memberships
Create Date: 2026-04-28
"""

from __future__ import annotations

from alembic import op
import sqlalchemy as sa

try:
    from sqlalchemy.dialects.postgresql import JSONB
except Exception:  # pragma: no cover
    JSONB = sa.JSON


revision = "20260428_add_saved_ideas"
down_revision = "20260428_add_platform_memberships"
branch_labels = None
depends_on = None


def _json_type(bind):
    return JSONB() if bind.dialect.name == "postgresql" else sa.JSON()


def _table_exists(bind, table_name: str) -> bool:
    return sa.inspect(bind).has_table(table_name)


def upgrade() -> None:
    bind = op.get_bind()
    if _table_exists(bind, "saved_ideas"):
        return

    json_type = _json_type(bind)
    op.create_table(
        "saved_ideas",
        sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
        sa.Column("tenant_id", sa.BigInteger(), nullable=False),
        sa.Column("created_at", sa.TIMESTAMP(), server_default=sa.func.now(), nullable=False),
        sa.Column("updated_at", sa.TIMESTAMP(), server_default=sa.func.now(), nullable=False),
        sa.Column("user_id", sa.BigInteger(), sa.ForeignKey("users.id"), nullable=False),
        sa.Column("idea_id", sa.String(length=64), nullable=False),
        sa.Column("title", sa.String(length=255), nullable=False),
        sa.Column("raw_text", sa.Text(), nullable=False),
        sa.Column("summary", sa.Text(), nullable=False),
        sa.Column("source_type", sa.String(length=32), nullable=False, server_default="project_launch"),
        sa.Column("source_ref", sa.String(length=255), nullable=True),
        sa.Column("input_mode", sa.String(length=32), nullable=False, server_default="idea"),
        sa.Column("attachments", json_type, nullable=False),
        sa.Column("status", sa.String(length=32), nullable=False, server_default="saved"),
        sa.Column("ai_summary", sa.Text(), nullable=True),
        sa.Column("missing_questions", json_type, nullable=False),
        sa.Column("readiness_score", sa.Float(), nullable=False, server_default="0"),
        sa.Column("launch_draft_id", sa.String(length=64), nullable=True),
        sa.Column("promoted_project_id", sa.BigInteger(), sa.ForeignKey("projects.id"), nullable=True),
        sa.Column("promoted_at", sa.TIMESTAMP(), nullable=True),
        sa.Column("archived_at", sa.TIMESTAMP(), nullable=True),
        sa.UniqueConstraint("tenant_id", "idea_id", name="uq_saved_ideas_tenant_idea_id"),
    )
    op.create_index("ix_saved_ideas_tenant_id", "saved_ideas", ["tenant_id"], unique=False)
    op.create_index("ix_saved_ideas_user_id", "saved_ideas", ["user_id"], unique=False)
    op.create_index("ix_saved_ideas_idea_id", "saved_ideas", ["idea_id"], unique=False)
    op.create_index("ix_saved_ideas_source_type", "saved_ideas", ["source_type"], unique=False)
    op.create_index("ix_saved_ideas_status", "saved_ideas", ["status"], unique=False)
    op.create_index("ix_saved_ideas_launch_draft_id", "saved_ideas", ["launch_draft_id"], unique=False)
    op.create_index("ix_saved_ideas_promoted_project_id", "saved_ideas", ["promoted_project_id"], unique=False)


def downgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "saved_ideas"):
        return
    for index_name in (
        "ix_saved_ideas_promoted_project_id",
        "ix_saved_ideas_launch_draft_id",
        "ix_saved_ideas_status",
        "ix_saved_ideas_source_type",
        "ix_saved_ideas_idea_id",
        "ix_saved_ideas_user_id",
        "ix_saved_ideas_tenant_id",
    ):
        op.drop_index(index_name, table_name="saved_ideas")
    op.drop_table("saved_ideas")