-- Agrarian terrain tile registry prototype.
-- This schema is intentionally separate from player/world persistence so
-- terrain packages can be regenerated without overwriting player history.

CREATE TABLE IF NOT EXISTS terrain_tiles (
    tile_id TEXT PRIMARY KEY,
    display_name TEXT NOT NULL,
    grid_scheme TEXT NOT NULL,
    projection TEXT NOT NULL,
    utm_zone TEXT,
    easting_min_m INTEGER NOT NULL,
    northing_min_m INTEGER NOT NULL,
    easting_max_m INTEGER NOT NULL,
    northing_max_m INTEGER NOT NULL,
    tile_size_m INTEGER NOT NULL CHECK (tile_size_m = 1000),
    center_latitude REAL NOT NULL CHECK (center_latitude >= -90 AND center_latitude <= 90),
    center_longitude REAL NOT NULL CHECK (center_longitude >= -180 AND center_longitude <= 180),
    status TEXT NOT NULL CHECK (status IN (
        'unknown',
        'queued',
        'source_data_found',
        'generated',
        'validated',
        'packaged',
        'published',
        'deprecated',
        'blocked'
    )),
    biome_primary TEXT NOT NULL DEFAULT 'unknown',
    generation_version INTEGER NOT NULL DEFAULT 0,
    package_version INTEGER NOT NULL DEFAULT 0,
    notes TEXT NOT NULL DEFAULT '',
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_terrain_tiles_grid
ON terrain_tiles (grid_scheme, projection, utm_zone, easting_min_m, northing_min_m);

CREATE INDEX IF NOT EXISTS idx_terrain_tiles_status
ON terrain_tiles (status);

CREATE TABLE IF NOT EXISTS terrain_tile_neighbors (
    tile_id TEXT NOT NULL,
    direction TEXT NOT NULL CHECK (direction IN ('n', 'ne', 'e', 'se', 's', 'sw', 'w', 'nw')),
    neighbor_tile_id TEXT NOT NULL,
    PRIMARY KEY (tile_id, direction),
    FOREIGN KEY (tile_id) REFERENCES terrain_tiles(tile_id),
    FOREIGN KEY (neighbor_tile_id) REFERENCES terrain_tiles(tile_id)
);

CREATE TABLE IF NOT EXISTS terrain_tile_sources (
    tile_source_id INTEGER PRIMARY KEY AUTOINCREMENT,
    tile_id TEXT NOT NULL,
    source_kind TEXT NOT NULL,
    source_name TEXT NOT NULL,
    source_uri TEXT NOT NULL DEFAULT '',
    license_name TEXT NOT NULL DEFAULT '',
    source_version TEXT NOT NULL DEFAULT '',
    coverage_status TEXT NOT NULL CHECK (coverage_status IN (
        'needed',
        'candidate',
        'confirmed',
        'missing',
        'not_applicable'
    )),
    FOREIGN KEY (tile_id) REFERENCES terrain_tiles(tile_id)
);

CREATE INDEX IF NOT EXISTS idx_terrain_tile_sources_tile
ON terrain_tile_sources (tile_id, source_kind);

CREATE TABLE IF NOT EXISTS terrain_tile_packages (
    package_id TEXT PRIMARY KEY,
    tile_id TEXT NOT NULL,
    package_version INTEGER NOT NULL,
    unreal_engine_version TEXT NOT NULL,
    world_partition_ready INTEGER NOT NULL DEFAULT 0 CHECK (world_partition_ready IN (0, 1)),
    package_uri TEXT NOT NULL DEFAULT '',
    content_hash TEXT NOT NULL DEFAULT '',
    package_size_bytes INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    published_at TEXT,
    FOREIGN KEY (tile_id) REFERENCES terrain_tiles(tile_id)
);

CREATE INDEX IF NOT EXISTS idx_terrain_tile_packages_tile
ON terrain_tile_packages (tile_id, package_version);

CREATE TABLE IF NOT EXISTS terrain_tile_generation_jobs (
    job_id TEXT PRIMARY KEY,
    tile_id TEXT NOT NULL,
    job_type TEXT NOT NULL,
    status TEXT NOT NULL CHECK (status IN (
        'queued',
        'running',
        'succeeded',
        'failed',
        'cancelled'
    )),
    requested_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
    started_at TEXT,
    finished_at TEXT,
    log_uri TEXT NOT NULL DEFAULT '',
    error_summary TEXT NOT NULL DEFAULT '',
    FOREIGN KEY (tile_id) REFERENCES terrain_tiles(tile_id)
);

CREATE INDEX IF NOT EXISTS idx_terrain_tile_generation_jobs_tile
ON terrain_tile_generation_jobs (tile_id, status);