-- Metadata project configuration schema patch.
-- Admin APIs write these tables; operators should not hand-edit encrypted values.

CREATE EXTENSION IF NOT EXISTS pgcrypto;

CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TABLE IF NOT EXISTS projects (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(100) NOT NULL,
    code VARCHAR(50) UNIQUE NOT NULL,
    description TEXT,
    gs_workspace VARCHAR(100) UNIQUE NOT NULL,
    map_extent JSONB,
    status VARCHAR(20) DEFAULT 'active' NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP NOT NULL,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP NOT NULL,
    CONSTRAINT projects_status_check CHECK (status IN ('active', 'inactive', 'archived'))
);

CREATE INDEX IF NOT EXISTS idx_projects_status ON projects(status);
CREATE INDEX IF NOT EXISTS idx_projects_code ON projects(code);

DROP TRIGGER IF EXISTS update_projects_updated_at ON projects;
CREATE TRIGGER update_projects_updated_at
    BEFORE UPDATE ON projects
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

CREATE TABLE IF NOT EXISTS project_databases (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
    db_role VARCHAR(20) NOT NULL,
    db_type VARCHAR(20) NOT NULL,
    dsn_encrypted TEXT NOT NULL,
    pool_min_size INTEGER DEFAULT 2 NOT NULL,
    pool_max_size INTEGER DEFAULT 10 NOT NULL,
    CONSTRAINT project_databases_unique_role UNIQUE (project_id, db_role),
    CONSTRAINT project_databases_role_check CHECK (db_role IN ('biz_data', 'iot_data')),
    CONSTRAINT project_databases_type_check CHECK (db_type IN ('postgresql', 'timescaledb')),
    CONSTRAINT project_databases_pool_check CHECK (
        pool_min_size >= 1 AND pool_max_size >= pool_min_size
    )
);

CREATE INDEX IF NOT EXISTS idx_project_databases_project_id
    ON project_databases(project_id);
CREATE INDEX IF NOT EXISTS idx_project_databases_role
    ON project_databases(db_role);