"""Wiring for the delivery workstream (repo workspaces, delivery hooks, deploy tester).

The real adapters are selected by settings; the fakes remain the defaults so a
test that does not opt in never touches a git binary, a container or a network.

``build_repo_workspace`` is the interesting one: the git adapter needs to know
*where* a project's repository lives and *how* to authenticate to it, and that
knowledge lives in three places — ``project_repositories`` +
``project_git_credentials`` for the platform forge, ``project_external_git`` for a
user-supplied remote, and ``projects`` for which of the two applies. The resolver
below is the only code that joins them, and it hands the plaintext secret
straight to the adapter for the duration of a single call.
"""

from __future__ import annotations

import logging

from sqlalchemy.ext.asyncio import AsyncSession

from app.application.ports.delivery_hooks import DeliveryHooks
from app.application.ports.deploy_target import DeployTargetTester
from app.application.ports.repo_workspace import FakeRepoWorkspace, RepoWorkspacePort
from app.application.services.delivery_service import DeliveryService
from app.application.services.deploy_service import DeployService
from app.core.config import settings
from app.core.crypto import decrypt
from app.infrastructure.adapters.git_workspace import (
    LocalGitWorkspaceAdapter,
    ProjectGitSource,
)
from app.infrastructure.adapters.registry import get_domain_router, get_sandbox_provider
from app.infrastructure.db.models import ProjectRow
from app.infrastructure.repositories.app_profile import AppProfileRepository
from app.infrastructure.repositories.delivery import (
    AppRuntimeRepository,
    PipelineRunRepository,
    PipelineStepRepository,
    ProductionDeployRepository,
    ReleaseRepository,
)
from app.infrastructure.repositories.identity import OrganizationRepository
from app.infrastructure.repositories.projects import (
    DeployTargetRepository,
    PreviewDomainRepository,
    ProjectExternalGitRepository,
    ProjectGitCredentialRepository,
    ProjectGitRepoRepository,
    ProjectRepository,
)

logger = logging.getLogger("agy.container.delivery")

_fake_workspace = FakeRepoWorkspace()


def build_repo_workspace(session: AsyncSession) -> RepoWorkspacePort:
    """The platform's git adapter, or the in-memory fake when ``GIT_WORKSPACE=fake``."""
    if settings.git_workspace.strip().lower() != "local":
        return _fake_workspace

    projects = ProjectRepository(session)
    repos = ProjectGitRepoRepository(session)
    credentials = ProjectGitCredentialRepository(session)
    external = ProjectExternalGitRepository(session)

    async def resolve(project_id: str) -> ProjectGitSource | None:
        project = await projects.get(project_id)
        if project is None:
            return None

        row = await session.get(ProjectRow, project_id)
        if row is None:
            return None
        git_source = (row.git_source or "platform").lower()

        if git_source == "external":
            url = (row.external_repo_url or "").strip()
            if not url:
                return None
            record = await external.get_for_project(project_id)
            return ProjectGitSource(
                project_id=project_id,
                organization_id=project.organization_id,
                clone_url=url,
                default_branch=project.default_branch,
                auth_type=(record.auth_type if record else "none") or "none",
                username=record.username if record else None,
                secret=_decrypt_or_none(
                    record.secret_encrypted if record else None, project_id
                ),
                known_hosts=record.known_hosts if record else None,
                is_platform=False,
            )

        repo = await repos.get_for_project(project_id)
        if repo is None or not repo.clone_url:
            return None
        credential = await credentials.get_for_project(project_id)
        secret = _decrypt_or_none(
            credential.encrypted_password if credential else None, project_id
        )
        return ProjectGitSource(
            project_id=project_id,
            organization_id=project.organization_id,
            clone_url=repo.clone_url,
            default_branch=repo.default_branch or project.default_branch,
            auth_type="token" if secret else "none",
            username=credential.username if credential else None,
            secret=secret,
            is_platform=True,
        )

    return LocalGitWorkspaceAdapter(resolver=resolve)


def _decrypt_or_none(ciphertext: str | None, project_id: str) -> str | None:
    """Decrypt a stored secret, tolerating a rotated ``ENCRYPTION_KEY``.

    A rotated key must surface as "no credential" (git then fails with an auth
    error the user can act on) rather than as an exception that breaks an
    unrelated request. The failure is logged, never raised with the ciphertext.
    """
    if not ciphertext:
        return None
    try:
        return decrypt(ciphertext)
    except Exception:  # noqa: BLE001 - see docstring
        logger.warning("git credential for project %s could not be decrypted", project_id)
        return None


def build_delivery_hooks(session: AsyncSession) -> DeliveryHooks:
    """The real CI/CD service — it *is* the hook implementation.

    The org wizard calls `on_app_created` after its own transaction commits, and
    the engine calls `on_branch_pushed` after a successful merge; both get the
    same object the delivery router and worker use, so there is exactly one
    implementation of "a push becomes a build".
    """
    return build_delivery_service(session)


def build_delivery_service(session: AsyncSession) -> DeliveryService:
    """CI/CD: pipeline runs, the demo runtime and the deploy hooks."""
    return DeliveryService(
        runs=PipelineRunRepository(session),
        steps=PipelineStepRepository(session),
        releases=ReleaseRepository(session),
        runtimes=AppRuntimeRepository(session),
        projects=ProjectRepository(session),
        profiles=AppProfileRepository(session),
        organizations=OrganizationRepository(session),
        ports=PreviewDomainRepository(session),
        workspace=build_repo_workspace(session),
        domains=get_domain_router(),
        containers=_container_runtime(),
    )


def _container_runtime():
    """The adapter that can start build and demo containers.

    Falls back to a runtime that refuses everything when the configured sandbox
    provider cannot run containers (the mock, or a remote provider): a pipeline
    run then fails cleanly with a plain message instead of pretending to deploy.
    """
    provider = get_sandbox_provider()
    if hasattr(provider, "run_step") and hasattr(provider, "remove_container"):
        return provider
    return _UnavailableContainerRuntime()


class _UnavailableContainerRuntime:
    """A container runtime that cannot run anything, and says so."""

    async def run_step(self, **_kwargs):  # noqa: ANN003
        from app.application.ports import CommandResult

        return CommandResult(
            exit_code=127,
            stdout="",
            stderr="SANDBOX_PROVIDER cannot run containers; set SANDBOX_PROVIDER=docker.",
        )

    async def remove_container(self, container_id: str) -> bool:  # noqa: ARG002
        return False


def build_deploy_target_tester(session: AsyncSession) -> DeployTargetTester:
    """The real tester: SSH/SFTP over asyncssh, FTP/FTPS over aioftp.

    The wizard calls this to validate a user-supplied production target, and it
    runs the same SSRF check the git adapter does before a byte leaves the host.
    """
    from app.infrastructure.adapters.deploy_target import DispatchingDeployTargetTester

    return DispatchingDeployTargetTester()


def build_deploy_service(session: AsyncSession) -> DeployService:
    """Production deploys: human-triggered, confirmed and audited."""
    from app.infrastructure.adapters.deploy_target import DispatchingDeployTargetTester

    return DeployService(
        projects=ProjectRepository(session),
        organizations=OrganizationRepository(session),
        targets=DeployTargetRepository(session),
        deploys=ProductionDeployRepository(session),
        releases=ReleaseRepository(session),
        runtimes=AppRuntimeRepository(session),
        tester=DispatchingDeployTargetTester(),
    )