-- ===========
--  Users & Plans
-- ===========

-- A function to automatically update 'updated_at' columns
CREATE
OR REPLACE
FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN NEW.updated_at = NOW();
RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TABLE users
(
    id              SERIAL PRIMARY KEY,
    email           TEXT NOT NULL UNIQUE,
    username        TEXT,
    hashed_password TEXT NOT NULL,
    created_at      TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at      TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE plans
(
    id              SERIAL PRIMARY KEY,
    name            TEXT  NOT NULL UNIQUE, -- 'Free', 'Pro', 'Enterprise'
    -- Features des Plans als JSONB. Flexibel und indizierbar.
    features        JSONB NOT NULL,
    stripe_price_id TEXT UNIQUE,
    created_at      TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at      TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

-- ===========
--  Tenancy (Workspaces & Members)
-- ===========

CREATE TABLE workspaces
(
    id                  SERIAL PRIMARY KEY,
    name                TEXT    NOT NULL,
    owner_id            INTEGER NOT NULL REFERENCES users (id),
    plan_id             INTEGER NOT NULL REFERENCES plans (id),
    subscription_status TEXT    NOT NULL, -- z.B. 'active', 'trialing'
    created_at          TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at          TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE workspace_members
(
    user_id      INTEGER NOT NULL REFERENCES users (id) ON DELETE CASCADE,
    workspace_id INTEGER NOT NULL REFERENCES workspaces (id) ON DELETE CASCADE,
    role_id      INTEGER NOT NULL REFERENCES roles (id),
    joined_at    TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (user_id, workspace_id)
);

-- ===========
--  RBAC (Roles & Permissions)
-- ===========

CREATE TABLE roles
(
    id   SERIAL PRIMARY KEY,
    name TEXT NOT NULL UNIQUE -- 'Workspace Owner', 'Admin', 'Developer', 'Viewer'
);

CREATE TABLE permissions
(
    id          SERIAL PRIMARY KEY,
    action      TEXT NOT NULL UNIQUE, -- 'project:create', 'route:delete', etc.
    description TEXT
);

CREATE TABLE role_permissions
(
    role_id       INTEGER NOT NULL REFERENCES roles (id) ON DELETE CASCADE,
    permission_id INTEGER NOT NULL REFERENCES permissions (id) ON DELETE CASCADE,
    PRIMARY KEY (role_id, permission_id)
);

-- ===========
--  Product Logic (Projects & Routes)
-- ===========

CREATE TABLE projects
(
    id           SERIAL PRIMARY KEY,
    workspace_id INTEGER NOT NULL REFERENCES workspaces (id) ON DELETE CASCADE,
    name         TEXT    NOT NULL,
    description  TEXT,
    created_at   TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
    updated_at   TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE routes
(
    id                    SERIAL PRIMARY KEY,
    project_id            INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
    -- Matching Rules
    method                TEXT    NOT NULL,
    path                  TEXT    NOT NULL,
    request_body_contains TEXT,
    -- Protocol Dispatcher
    protocol              TEXT    NOT NULL CHECK (protocol IN ('REST_JSON', 'GRAPHQL', 'RAW_BYTESTREAM', 'JSON_RPC')),
    schema_definition     TEXT,
    -- Response Definition
    response_mode         TEXT    NOT NULL CHECK (response_mode IN ('STATIC', 'DYNAMIC')) DEFAULT 'STATIC',
    response_script       TEXT,
    status_code           INTEGER NOT NULL                                                DEFAULT 200,
    -- JSONB für Header und Text für Body
    response_headers      JSONB,
    response_body         TEXT,
    created_at            TIMESTAMPTZ                                                     DEFAULT CURRENT_TIMESTAMP,
    updated_at            TIMESTAMPTZ                                                     DEFAULT CURRENT_TIMESTAMP
);

-- ===========
--  Indizes für schnelle Abfragen (Syntax is the same)
-- ===========

CREATE INDEX idx_workspaces_owner_id ON workspaces (owner_id);
CREATE INDEX idx_projects_workspace_id ON projects (workspace_id);
CREATE INDEX idx_routes_project_id ON routes (project_id);

-- ===========
--  Trigger to auto-update 'updated_at' fields
--  Apply this to all tables that have the 'updated_at' column
-- ===========
CREATE TRIGGER update_users_updated_at
    BEFORE UPDATE
    ON users
    FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();
CREATE TRIGGER update_plans_updated_at
    BEFORE UPDATE
    ON plans
    FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();
CREATE TRIGGER update_workspaces_updated_at
    BEFORE UPDATE
    ON workspaces
    FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();
CREATE TRIGGER update_projects_updated_at
    BEFORE UPDATE
    ON projects
    FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();
CREATE TRIGGER update_routes_updated_at
    BEFORE UPDATE
    ON routes
    FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();