from __future__ import annotations

from collections.abc import Mapping, Sequence

ALL_SCOPES = frozenset(
    {
        "templates:read",
        "templates:run",
        "templates:create",
        "templates:update",
        "templates:delete",
        "templates:apply",
        "templates:publish",
        "operations:read",
        "operations:execute",
        "jobs:read",
        "jobs:create",
        "jobs:cancel",
        "assets:read",
        "assets:write",
        "assets:delete",
        "mcp:read",
        "mcp:execute",
        "system:read",
        "social:accounts:read",
        "social:accounts:write",
        "social:posts:read",
        "social:posts:write",
        "social:posts:publish",
        "social:schedules:read",
        "social:schedules:write",
        "social:analytics:read",
        "analytics:read",
        "analytics:sync",
        "analytics:export",
        "generation:providers:read",
        "generation:requests:read",
        "generation:requests:create",
        "generation:jobs:cancel",
        "ai:read",
        "ai:generate",
        "ai:transform",
        "ai:analyze",
        "ai:create",
        "copilot:read",
        "copilot:execute",
        "projects:read",
        "projects:create",
        "projects:update",
        "projects:delete",
        # Frontend Architecture v2 uses this aggregate solely for capability
        # rendering. Enforcement remains method-specific in ScopePolicy.
        "projects:write",
        "members:read",
        "members:invite",
        "members:update",
        "members:remove",
        "teams:read",
        "teams:create",
        "teams:update",
        "teams:delete",
        "projects:share",
        "projects:collaborate",
        "comments:read",
        "comments:create",
        "approvals:read",
        "approvals:create",
        "approvals:review",
        "approvals:manage",
        "admin",
    }
)

DEFAULT_ROLE_SCOPES: dict[str, frozenset[str]] = {
    "admin": frozenset({"admin"}),
    "developer": frozenset(
        {
            "templates:read",
            "templates:run",
            "templates:create",
            "templates:update",
            "templates:delete",
            "templates:apply",
            "templates:publish",
            "operations:read",
            "operations:execute",
            "jobs:read",
            "jobs:create",
            "jobs:cancel",
            "assets:read",
            "assets:write",
            "mcp:read",
            "mcp:execute",
            "system:read",
            "social:accounts:read",
            "social:accounts:write",
            "social:posts:read",
            "social:posts:write",
            "social:posts:publish",
            "social:schedules:read",
            "social:schedules:write",
            "social:analytics:read",
            "analytics:read",
            "analytics:sync",
            "analytics:export",
            "generation:providers:read",
            "generation:requests:read",
            "generation:requests:create",
            "generation:jobs:cancel",
            "ai:read",
            "ai:generate",
            "ai:transform",
            "ai:analyze",
            "ai:create",
            "copilot:read",
            "copilot:execute",
            "projects:read",
            "projects:create",
            "projects:update",
            "projects:delete",
            "projects:write",
            "members:read",
            "members:invite",
            "members:update",
            "members:remove",
            "teams:read",
            "teams:create",
            "teams:update",
            "teams:delete",
            "projects:share",
            "projects:collaborate",
            "comments:read",
            "comments:create",
            "approvals:read",
            "approvals:create",
            "approvals:review",
            "approvals:manage",
        }
    ),
    "operator": frozenset(
        {
            "templates:read",
            "templates:run",
            "templates:create",
            "templates:update",
            "templates:delete",
            "templates:apply",
            "templates:publish",
            "operations:read",
            "operations:execute",
            "jobs:read",
            "jobs:create",
            "jobs:cancel",
            "assets:read",
            "mcp:read",
            "mcp:execute",
            "system:read",
            "social:accounts:read",
            "social:accounts:write",
            "social:posts:read",
            "social:posts:write",
            "social:posts:publish",
            "social:schedules:read",
            "social:schedules:write",
            "social:analytics:read",
            "analytics:read",
            "analytics:sync",
            "generation:providers:read",
            "generation:requests:read",
            "generation:requests:create",
            "generation:jobs:cancel",
            "ai:read",
            "ai:generate",
            "ai:transform",
            "ai:analyze",
            "ai:create",
            "copilot:read",
            "copilot:execute",
            "projects:read",
            "projects:create",
            "projects:update",
            "projects:delete",
            "projects:write",
            "members:read",
            "teams:read",
            "projects:share",
            "projects:collaborate",
            "comments:read",
            "comments:create",
            "approvals:read",
            "approvals:review",
        }
    ),
    "viewer": frozenset(
        {
            "templates:read",
            "operations:read",
            "jobs:read",
            "assets:read",
            "mcp:read",
            "system:read",
            "social:accounts:read",
            "social:posts:read",
            "social:schedules:read",
            "social:analytics:read",
            "analytics:read",
            "generation:providers:read",
            "generation:requests:read",
            "ai:read",
            "copilot:read",
            "projects:read",
            "members:read",
            "teams:read",
            "projects:collaborate",
            "comments:read",
            "approvals:read",
        }
    ),
}


def configured_roles(
    overrides: Mapping[str, Sequence[str]] | None = None,
) -> dict[str, frozenset[str]]:
    roles = dict(DEFAULT_ROLE_SCOPES)
    for role, scopes in (overrides or {}).items():
        normalized_role = role.strip().lower()
        normalized_scopes = frozenset(scope.strip().lower() for scope in scopes)
        unknown = normalized_scopes - ALL_SCOPES
        if unknown:
            raise ValueError(f"Role '{normalized_role}' has unsupported scopes: {sorted(unknown)}")
        roles[normalized_role] = normalized_scopes
    return roles


def effective_scopes(
    role: str | None,
    explicit_scopes: Sequence[str],
    overrides: Mapping[str, Sequence[str]] | None = None,
) -> frozenset[str]:
    scopes = set(scope.strip().lower() for scope in explicit_scopes)
    if role:
        scopes.update(configured_roles(overrides).get(role.strip().lower(), ()))
    project_mutations = {"projects:create", "projects:update", "projects:delete"}
    if "projects:write" in scopes:
        scopes.update(project_mutations)
    if project_mutations.issubset(scopes):
        scopes.add("projects:write")
    if "admin" in scopes:
        return ALL_SCOPES
    return frozenset(scopes)