-- FarmHouse Holdings — core schema v1 (Slice 1 subset, PRD §14.3)
-- Postgres 15+. Deferred entities (Schedule, KnowledgeItem, Incident, ...) added when their slice needs them.

CREATE TABLE company (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    slug            text NOT NULL UNIQUE,
    name            text NOT NULL,
    description     text NOT NULL DEFAULT '',
    lifecycle_state text NOT NULL DEFAULT 'draft'
                    CHECK (lifecycle_state IN ('draft','active','paused','archived')),
    -- repo, discord channel, office theme, autonomy policy, tz override
    config          jsonb NOT NULL DEFAULT '{}',
    created_at      timestamptz NOT NULL DEFAULT now()
);

CREATE TABLE employee (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid NOT NULL REFERENCES company(id),
    name            text NOT NULL,
    title           text NOT NULL,
    role            text NOT NULL DEFAULT 'engineer'
                    CHECK (role IN ('manager','engineer','qa','consultant')),
    department      text NOT NULL DEFAULT '',
    manager_id      uuid REFERENCES employee(id),
    hermes_profile  text,                       -- Hermes profile name (ADR-001)
    model_alias     text NOT NULL DEFAULT 'local-default',
    authority_level int  NOT NULL DEFAULT 2 CHECK (authority_level BETWEEN 0 AND 5),
    soul_version    int  NOT NULL DEFAULT 1,    -- versioned system prompt (PRD §6.6)
    status          text NOT NULL DEFAULT 'idle'
                    CHECK (status IN ('idle','working','blocked','offline')),
    created_at      timestamptz NOT NULL DEFAULT now(),
    UNIQUE (company_id, name)
);

CREATE TABLE work_item (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid NOT NULL REFERENCES company(id),
    parent_id       uuid REFERENCES work_item(id),
    type            text NOT NULL CHECK (type IN
                    ('objective','milestone','epic','task','subtask','defect',
                     'clarification','approval','research','proposal','experiment',
                     'review','incident','postmortem')),
    title           text NOT NULL,
    description     text NOT NULL DEFAULT '',
    status          text NOT NULL DEFAULT 'backlog' CHECK (status IN
                    ('backlog','ready','in_progress','blocked','review','done','cancelled')),
    priority        text NOT NULL DEFAULT 'medium' CHECK (priority IN
                    ('critical','high','medium','low','debt','research','experiment','idea')),
    owner_id        uuid REFERENCES employee(id),
    acceptance_criteria jsonb NOT NULL DEFAULT '[]',
    -- runaway caps, engine-enforced (PRD_ADDENDUM §3): max_iterations, max_tokens, max_wall_seconds
    budget          jsonb NOT NULL DEFAULT '{"max_iterations":15,"max_tokens":100000,"max_wall_seconds":1800}',
    hermes_task_id  text,                               -- kanban task carrying this item's current run
    dispatched_at   timestamptz,
    created_at      timestamptz NOT NULL DEFAULT now(),
    updated_at      timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX work_item_dispatch_idx ON work_item (company_id, status, priority);

-- Append-only event log: single source of truth for history (PRD §14.2).
CREATE TABLE event (
    event_id        uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid REFERENCES company(id),        -- NULL = holdings-level
    actor           text NOT NULL,                      -- 'employee:<uuid>' | 'user:philip' | 'system'
    event_type      text NOT NULL,                      -- see engine/schemas/events.py
    schema_version  int  NOT NULL DEFAULT 1,
    work_item_id    uuid REFERENCES work_item(id),
    parent_event_id uuid REFERENCES event(event_id),
    correlation_id  uuid,                               -- groups one logical exchange
    source          text NOT NULL DEFAULT 'engine'
                    CHECK (source IN ('engine','web','api','discord','hermes','scheduler','cli')),
    payload         jsonb NOT NULL DEFAULT '{}',
    policy_decision jsonb,                              -- {allowed, rule_id, level, reason}
    provenance      jsonb,                              -- {model, worker, tool, hermes_run_id}
    created_at      timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX event_company_time_idx ON event (company_id, created_at);
CREATE INDEX event_work_item_idx ON event (work_item_id) WHERE work_item_id IS NOT NULL;

CREATE FUNCTION event_immutable() RETURNS trigger AS $$
BEGIN RAISE EXCEPTION 'event log is append-only'; END;
$$ LANGUAGE plpgsql;
CREATE TRIGGER event_no_update BEFORE UPDATE OR DELETE ON event
    FOR EACH ROW EXECUTE FUNCTION event_immutable();

CREATE TABLE approval (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid NOT NULL REFERENCES company(id),
    work_item_id    uuid REFERENCES work_item(id),
    requested_by    uuid NOT NULL REFERENCES employee(id),
    level           int  NOT NULL CHECK (level BETWEEN 3 AND 5),
    summary         text NOT NULL,
    options         jsonb NOT NULL DEFAULT '[]',        -- clarification options (PRD §7.6)
    status          text NOT NULL DEFAULT 'pending'
                    CHECK (status IN ('pending','approved','rejected','expired')),
    decided_by      text,                               -- 'user:philip' | 'policy:<rule_id>'
    rationale       text,
    created_at      timestamptz NOT NULL DEFAULT now(),
    decided_at      timestamptz
);

CREATE TABLE artifact (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid NOT NULL REFERENCES company(id),
    work_item_id    uuid REFERENCES work_item(id),
    kind            text NOT NULL CHECK (kind IN
                    ('evidence_bundle','screenshot','video','trace','test_report',
                     'build','preview','document','diff')),
    uri             text NOT NULL,                      -- file path or object-store URI
    meta            jsonb NOT NULL DEFAULT '{}',
    created_at      timestamptz NOT NULL DEFAULT now()
);

CREATE TABLE tool_execution (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid NOT NULL REFERENCES company(id),
    employee_id     uuid NOT NULL REFERENCES employee(id),
    work_item_id    uuid REFERENCES work_item(id),
    tool            text NOT NULL,
    args            jsonb NOT NULL DEFAULT '{}',
    authority_level int  NOT NULL,
    policy_decision jsonb NOT NULL,                     -- always recorded (PRD §16.1)
    status          text NOT NULL DEFAULT 'running'
                    CHECK (status IN ('running','ok','error','denied','timeout')),
    result_summary  text,
    started_at      timestamptz NOT NULL DEFAULT now(),
    finished_at     timestamptz
);

CREATE TABLE cost_entry (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid NOT NULL REFERENCES company(id),
    employee_id     uuid REFERENCES employee(id),
    work_item_id    uuid REFERENCES work_item(id),
    kind            text NOT NULL CHECK (kind IN ('local_inference','consultant','tool','storage')),
    tokens_in       bigint NOT NULL DEFAULT 0,
    tokens_out      bigint NOT NULL DEFAULT 0,
    wall_seconds    numeric NOT NULL DEFAULT 0,
    usd             numeric NOT NULL DEFAULT 0,         -- 0 for local; real for consultants
    meta            jsonb NOT NULL DEFAULT '{}',
    created_at      timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX cost_company_time_idx ON cost_entry (company_id, created_at);

-- Deterministic policy: most specific enabled rule wins (company+employee > company > global).
-- Engine denies by default when no rule matches (PRD §8: enforced in code, not prompts).
CREATE TABLE policy_rule (
    id              uuid PRIMARY KEY DEFAULT gen_random_uuid(),
    company_id      uuid REFERENCES company(id),        -- NULL = global
    employee_id     uuid REFERENCES employee(id),       -- NULL = any employee
    tool_pattern    text NOT NULL DEFAULT '*',          -- glob: 'git.*', 'shell', '*'
    environment     text NOT NULL DEFAULT 'sandbox'
                    CHECK (environment IN ('sandbox','internal','external','production')),
    max_level       int  NOT NULL CHECK (max_level BETWEEN 0 AND 5),
    enabled         boolean NOT NULL DEFAULT true,
    note            text NOT NULL DEFAULT '',
    created_at      timestamptz NOT NULL DEFAULT now()
);

-- Global defaults: read/propose/sandbox anywhere; nothing above level 2 without an explicit rule.
INSERT INTO policy_rule (tool_pattern, environment, max_level, note) VALUES
    ('*', 'sandbox',    2, 'global default: full sandbox freedom'),
    ('*', 'internal',   1, 'global default: propose-only against internal env'),
    ('*', 'external',   0, 'global default: observe-only external'),
    ('*', 'production', 0, 'global default: observe-only production');