-- ABOUTME: Creates interval projection tables for time-series tracking.
-- ABOUTME: Tracks animal location, tag, and attribute history over time.

-- Track animal location history
-- Each row represents a period when an animal was at a specific location
CREATE TABLE animal_location_intervals (
    animal_id TEXT NOT NULL CHECK(length(animal_id) = 26),
    location_id TEXT NOT NULL CHECK(length(location_id) = 26),
    start_utc INTEGER NOT NULL,
    end_utc INTEGER,
    PRIMARY KEY (animal_id, start_utc),
    CHECK(end_utc IS NULL OR end_utc > start_utc)
);

-- Index for "which animals were at location X at time T" queries
CREATE INDEX idx_ali_loc_time ON animal_location_intervals(
    location_id, start_utc, COALESCE(end_utc, 32503680000000)
);

-- Index for "where was animal X at time T" queries
CREATE INDEX idx_ali_animal_time ON animal_location_intervals(
    animal_id, start_utc, COALESCE(end_utc, 32503680000000)
);

-- Track animal tag history
-- Each row represents a period when an animal had a specific tag
CREATE TABLE animal_tag_intervals (
    animal_id TEXT NOT NULL CHECK(length(animal_id) = 26),
    tag TEXT NOT NULL,
    start_utc INTEGER NOT NULL,
    end_utc INTEGER,
    PRIMARY KEY (animal_id, tag, start_utc),
    CHECK(end_utc IS NULL OR end_utc > start_utc)
);

-- Index for "which animals had tag X at time T" queries
CREATE INDEX idx_ati_tag_time ON animal_tag_intervals(
    tag, start_utc, COALESCE(end_utc, 32503680000000)
);

-- Track attribute changes (sex, life_stage, repro_status, status)
-- Each row represents a period when an animal had a specific attribute value
CREATE TABLE animal_attr_intervals (
    animal_id TEXT NOT NULL CHECK(length(animal_id) = 26),
    attr TEXT NOT NULL CHECK(attr IN ('sex', 'life_stage', 'repro_status', 'status')),
    value TEXT NOT NULL,
    start_utc INTEGER NOT NULL,
    end_utc INTEGER,
    PRIMARY KEY (animal_id, attr, start_utc),
    CHECK(end_utc IS NULL OR end_utc > start_utc)
);

-- Index for "which animals had attr=value at time T" queries
CREATE INDEX idx_aai_attr_time ON animal_attr_intervals(
    attr, value, start_utc, COALESCE(end_utc, 32503680000000)
);