"""Report Template and Report Instance models for the Report Generator plugin."""

from __future__ import annotations

import uuid

from sqlalchemy import Boolean, ForeignKey, Index, Integer, String, Text
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin
from app.models.owned_mixin import OwnedMixin


class ReportTemplate(Base, TenantMixin, OwnedMixin):
    """Report template entity — Jinja2 or SQL template, tenant-scoped, soft-deletable."""

    __tablename__ = "report_templates"
    __table_args__ = (
        Index("ix_report_templates_tenant", "tenant_id"),
        Index("ix_report_templates_name", "name"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str] = mapped_column(Text, nullable=False, default="")
    template_type: Mapped[str] = mapped_column(
        String(50), nullable=False, default="jinja2"
    )
    content: Mapped[str] = mapped_column(Text, nullable=False)
    output_format: Mapped[str] = mapped_column(
        String(50), nullable=False, default="csv"
    )
    created_by: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)
    folder_id: Mapped[uuid.UUID | None] = mapped_column(PGUUID(as_uuid=True), nullable=True)


class ReportInstance(Base, TenantMixin, OwnedMixin):
    """Report instance entity — a generated report, tenant-scoped."""

    __tablename__ = "report_instances"
    __table_args__ = (
        Index("ix_report_instances_tenant", "tenant_id"),
        Index("ix_report_instances_template", "template_id"),
        Index("ix_report_instances_status", "status"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    template_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("report_templates.id", ondelete="CASCADE"),
        nullable=False,
    )
    status: Mapped[str] = mapped_column(
        String(50), nullable=False, default="pending"
    )
    output_path: Mapped[str | None] = mapped_column(
        String(1024), nullable=True
    )
    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_by: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)


class Letterhead(Base, TenantMixin, OwnedMixin):
    """Letterhead (Briefpapier) — page setup + header/footer block composition.

    Phase L1: per-tenant letterhead. ``config`` stores the page geometry
    (size/orientation/margins) plus header/footer/watermark block lists.
    Blocks use the same ``{id, type, config}`` shape as print templates so
    the drag/drop editor can edit both with one component set.
    """

    __tablename__ = "letterheads"
    __table_args__ = (
        Index("ix_letterheads_tenant", "tenant_id"),
        Index("ix_letterheads_name", "name"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str] = mapped_column(Text, nullable=False, default="")
    config: Mapped[dict] = mapped_column(JSONB, nullable=False, default=dict)
    is_default: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    created_by: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)


class PrintTemplate(Base, TenantMixin, OwnedMixin):
    """Print template — drag/drop block composition bound to a letterhead.

    Phase L1: ``blocks`` is an ordered JSONB array of
    ``{id, type, config}`` entries validated against the document block
    registry. ``entity_type`` selects the module placeholder contribution
    (e.g. "company" → contacts placeholders).
    """

    __tablename__ = "print_templates"
    __table_args__ = (
        Index("ix_print_templates_tenant", "tenant_id"),
        Index("ix_print_templates_name", "name"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str] = mapped_column(Text, nullable=False, default="")
    letterhead_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("letterheads.id", ondelete="SET NULL"),
        nullable=True,
    )
    entity_type: Mapped[str] = mapped_column(String(100), nullable=False, default="contact")
    blocks: Mapped[list] = mapped_column(JSONB, nullable=False, default=list)
    output_format: Mapped[str] = mapped_column(String(20), nullable=False, default="pdf")
    created_by: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)


class DocumentAsset(Base, TenantMixin, OwnedMixin):
    """Image asset for letterheads/print templates (logos, pictures).

    Stored via the central storage backend; ``data_url`` is rendered into
    PDFs inline (WeasyPrint URL fetcher allows data: URIs only).
    """

    __tablename__ = "document_assets"
    __table_args__ = (
        Index("ix_document_assets_tenant", "tenant_id"),
        Index("ix_document_assets_letterhead", "letterhead_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    letterhead_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True),
        ForeignKey("letterheads.id", ondelete="CASCADE"),
        nullable=True,
    )
    filename: Mapped[str] = mapped_column(String(255), nullable=False)
    mime_type: Mapped[str] = mapped_column(String(100), nullable=False)
    size_bytes: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    storage_path: Mapped[str] = mapped_column(String(1024), nullable=False)
    created_by: Mapped[uuid.UUID] = mapped_column(PGUUID(as_uuid=True), nullable=False)