-- This schema supports the phase-1 hybrid proof of concept.
-- The database stores centrally managed configuration only: templates,
-- lookup values, image policy, export settings, and lightweight app flags.
-- Completed reports are intentionally excluded from the server in this phase;
-- they remain browser-local artifacts exported by the client.

CREATE DATABASE IF NOT EXISTS check_list CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

USE check_list;

-- Template identity stays separate from version rows so a single checklist can
-- publish multiple definitions over time while preserving a stable code.
CREATE TABLE IF NOT EXISTS templates (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  code VARCHAR(100) NOT NULL,
  name VARCHAR(200) NOT NULL,
  description TEXT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_templates_code (code)
);

-- Each template version stores a full JSON definition snapshot. That keeps the
-- frontend contract simple because the client can render a form from one payload
-- without performing additional joins or reconstruction logic.
CREATE TABLE IF NOT EXISTS template_versions (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  template_id BIGINT UNSIGNED NOT NULL,
  version_number INT NOT NULL,
  status ENUM('draft', 'active', 'retired') NOT NULL DEFAULT 'draft',
  definition_json JSON NOT NULL,
  published_at DATETIME NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_template_version (template_id, version_number),
  KEY idx_template_versions_template_status (template_id, status),
  CONSTRAINT fk_template_versions_template
    FOREIGN KEY (template_id) REFERENCES templates (id)
    ON DELETE CASCADE
);

-- Lookup sets support dropdown-style fields in a normalized way. The template
-- JSON references the set by code, while individual values remain editable as
-- data rather than hardcoded frontend options.
CREATE TABLE IF NOT EXISTS lookup_sets (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  code VARCHAR(100) NOT NULL,
  name VARCHAR(200) NOT NULL,
  is_active TINYINT(1) NOT NULL DEFAULT 1,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_lookup_sets_code (code)
);

CREATE TABLE IF NOT EXISTS lookup_values (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  lookup_set_id BIGINT UNSIGNED NOT NULL,
  value VARCHAR(100) NOT NULL,
  label VARCHAR(200) NOT NULL,
  sort_order INT NOT NULL DEFAULT 0,
  is_default TINYINT(1) NOT NULL DEFAULT 0,
  is_active TINYINT(1) NOT NULL DEFAULT 1,
  PRIMARY KEY (id),
  UNIQUE KEY uq_lookup_value (lookup_set_id, value),
  KEY idx_lookup_values_lookup_set (lookup_set_id),
  CONSTRAINT fk_lookup_values_lookup_set
    FOREIGN KEY (lookup_set_id) REFERENCES lookup_sets (id)
    ON DELETE CASCADE
);

-- Image rules are server-managed so administrators can tighten or relax client
-- behavior, such as size limits or attachment counts, without changing browser
-- code. The client reads the active row and enforces it locally.
CREATE TABLE IF NOT EXISTS image_rules (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  code VARCHAR(100) NOT NULL,
  name VARCHAR(200) NOT NULL,
  allowed_mime_types_json JSON NOT NULL,
  max_file_size_bytes INT UNSIGNED NOT NULL,
  max_width_px INT UNSIGNED NOT NULL,
  max_height_px INT UNSIGNED NOT NULL,
  jpeg_quality INT UNSIGNED NOT NULL,
  oversize_behavior ENUM('auto_optimize', 'warn_then_optimize', 'block') NOT NULL DEFAULT 'auto_optimize',
  max_attachments_per_field INT UNSIGNED NOT NULL DEFAULT 5,
  is_active TINYINT(1) NOT NULL DEFAULT 1,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_image_rules_code (code)
);

-- Export profiles represent the eventual shape of the generated ZIP/XLSX output.
-- The current PoC only reads this information, but separating it now makes later
-- export customization easier.
CREATE TABLE IF NOT EXISTS export_profiles (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  code VARCHAR(100) NOT NULL,
  name VARCHAR(200) NOT NULL,
  zip_image_dir VARCHAR(100) NOT NULL DEFAULT 'images',
  excel_sheet_name VARCHAR(100) NOT NULL DEFAULT 'Checklist',
  include_template_version TINYINT(1) NOT NULL DEFAULT 1,
  include_export_timestamp TINYINT(1) NOT NULL DEFAULT 1,
  is_active TINYINT(1) NOT NULL DEFAULT 1,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_export_profiles_code (code)
);

-- Submitted reports are stored server-side for centralized review and archival.
-- The browser creates reports locally first; this table receives them when the
-- operator explicitly submits. The report_uuid links back to the browser-local
-- report ID so resubmissions are idempotent via ON DUPLICATE KEY UPDATE.
CREATE TABLE IF NOT EXISTS reports (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  report_uuid CHAR(36) NOT NULL,
  report_number VARCHAR(100) NOT NULL,
  template_code VARCHAR(100) NOT NULL,
  template_version INT NOT NULL,
  status ENUM('draft', 'final', 'in_progress', 'ready_for_export', 'exported', 'archived') NOT NULL DEFAULT 'draft',
  answers_json JSON NOT NULL,
  submitted_at DATETIME NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_reports_uuid (report_uuid),
  KEY idx_reports_template (template_code, template_version),
  KEY idx_reports_status (status)
);

-- The audit log captures every administrative mutation so the team can trace
-- when configuration changed and what the previous value was. Each row stores
-- the entity type, the entity identifier, the action, and JSON snapshots of
-- the old and new values.
CREATE TABLE IF NOT EXISTS audit_log (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  entity_type VARCHAR(100) NOT NULL,
  entity_code VARCHAR(200) NOT NULL,
  action VARCHAR(50) NOT NULL,
  old_value_json JSON NULL,
  new_value_json JSON NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_audit_entity (entity_type, entity_code)
);

-- Report images are stored as binary BLOBs in the database alongside metadata.
-- This keeps image storage self-contained without filesystem dependencies.
CREATE TABLE IF NOT EXISTS report_images (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  report_uuid CHAR(36) NOT NULL,
  record_id VARCHAR(100) NOT NULL,
  image_index SMALLINT UNSIGNED NOT NULL DEFAULT 0,
  file_name VARCHAR(500) NOT NULL,
  file_size INT UNSIGNED NOT NULL DEFAULT 0,
  mime_type VARCHAR(100) NOT NULL DEFAULT 'image/jpeg',
  width_px INT UNSIGNED NULL,
  height_px INT UNSIGNED NULL,
  exif_json JSON NULL,
  image_data LONGBLOB NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_report_images_report (report_uuid),
  KEY idx_report_images_record (report_uuid, record_id),
  CONSTRAINT fk_report_images_report
    FOREIGN KEY (report_uuid) REFERENCES reports (report_uuid)
    ON DELETE CASCADE
);

-- ═══════════════════════════════════════════════════════════════════════════════
-- Admin entity tables — store all admin-managed data relationally so it
-- persists across Docker restarts and browser sessions.
-- ═══════════════════════════════════════════════════════════════════════════════

-- Categories for template settings (e.g. "Electrical", "Mechanical")
CREATE TABLE IF NOT EXISTS admin_categories (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  value VARCHAR(200) NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_categories_value (value)
);

-- Sub-categories are children of categories
CREATE TABLE IF NOT EXISTS admin_sub_categories (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  value VARCHAR(200) NOT NULL,
  category_id BIGINT UNSIGNED NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_sub_categories_category (category_id),
  CONSTRAINT fk_sub_categories_category
    FOREIGN KEY (category_id) REFERENCES admin_categories (id)
    ON DELETE CASCADE
);

-- Severity levels
CREATE TABLE IF NOT EXISTS admin_severities (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  value VARCHAR(200) NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_severities_value (value)
);

-- Status options
CREATE TABLE IF NOT EXISTS admin_statuses (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  value VARCHAR(200) NOT NULL,
  require_handled_by TINYINT(1) NOT NULL DEFAULT 0,
  require_comment TINYINT(1) NOT NULL DEFAULT 0,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_statuses_value (value)
);

-- Handled By options
CREATE TABLE IF NOT EXISTS admin_handled_by (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  value VARCHAR(200) NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_handled_by_value (value)
);

-- Projects for task settings
CREATE TABLE IF NOT EXISTS admin_projects (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  value VARCHAR(200) NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_projects_value (value)
);

-- Processes are children of projects
CREATE TABLE IF NOT EXISTS admin_processes (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  value VARCHAR(200) NOT NULL,
  project_id BIGINT UNSIGNED NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_processes_project (project_id),
  CONSTRAINT fk_processes_project
    FOREIGN KEY (project_id) REFERENCES admin_projects (id)
    ON DELETE CASCADE
);

-- Users managed by the admin console
CREATE TABLE IF NOT EXISTS admin_users (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  email VARCHAR(255) NOT NULL,
  password_hash VARCHAR(255) NOT NULL DEFAULT '',
  name VARCHAR(200) NOT NULL,
  family_name VARCHAR(200) NOT NULL,
  company VARCHAR(200) NOT NULL DEFAULT '',
  role VARCHAR(50) NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_users_email (email)
);

-- Sites managed by the admin console
CREATE TABLE IF NOT EXISTS admin_sites (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  site_code VARCHAR(100) NOT NULL,
  host VARCHAR(50) NOT NULL DEFAULT '',
  obe_site_code VARCHAR(100) NOT NULL DEFAULT '',
  pxs_site_code VARCHAR(100) NOT NULL DEFAULT '',
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_sites_code (site_code)
);

-- Check list records (inspection items)
CREATE TABLE IF NOT EXISTS admin_cl_records (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  sort_order INT NOT NULL DEFAULT 0,
  category VARCHAR(200) NOT NULL DEFAULT '',
  sub_category VARCHAR(200) NOT NULL DEFAULT '',
  severity VARCHAR(200) NOT NULL DEFAULT '',
  image_required TINYINT(1) NOT NULL DEFAULT 0,
  description_en TEXT NOT NULL,
  description_fr TEXT NOT NULL,
  description_nl TEXT NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_cl_records_sort (sort_order)
);

-- Check list templates
CREATE TABLE IF NOT EXISTS admin_cl_templates (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  name VARCHAR(200) NOT NULL,
  scope VARCHAR(50) NOT NULL DEFAULT '',
  version VARCHAR(50) NOT NULL DEFAULT '',
  valid_from DATE NULL,
  valid_till DATE NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id)
);

-- Join table: which records belong to which template
CREATE TABLE IF NOT EXISTS admin_cl_template_records (
  template_id BIGINT UNSIGNED NOT NULL,
  record_id BIGINT UNSIGNED NOT NULL,
  PRIMARY KEY (template_id, record_id),
  CONSTRAINT fk_tpl_rec_template
    FOREIGN KEY (template_id) REFERENCES admin_cl_templates (id)
    ON DELETE CASCADE,
  CONSTRAINT fk_tpl_rec_record
    FOREIGN KEY (record_id) REFERENCES admin_cl_records (id)
    ON DELETE CASCADE
);

-- Task assignments (user + site + template + project/process)
CREATE TABLE IF NOT EXISTS admin_tasks (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  site_id BIGINT UNSIGNED NOT NULL,
  user_id BIGINT UNSIGNED NOT NULL,
  template_id BIGINT UNSIGNED NOT NULL,
  project VARCHAR(200) NOT NULL DEFAULT '',
  process VARCHAR(200) NOT NULL DEFAULT '',
  status VARCHAR(50) NOT NULL DEFAULT 'pending',
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  KEY idx_tasks_user (user_id),
  KEY idx_tasks_site (site_id),
  CONSTRAINT fk_tasks_site
    FOREIGN KEY (site_id) REFERENCES admin_sites (id)
    ON DELETE CASCADE,
  CONSTRAINT fk_tasks_user
    FOREIGN KEY (user_id) REFERENCES admin_users (id)
    ON DELETE CASCADE,
  CONSTRAINT fk_tasks_template
    FOREIGN KEY (template_id) REFERENCES admin_cl_templates (id)
    ON DELETE CASCADE
);

-- Admin credentials for application administrator login
CREATE TABLE IF NOT EXISTS admin_credentials (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  username VARCHAR(100) NOT NULL,
  password VARCHAR(255) NOT NULL,
  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_admin_credentials_username (username)
);