package config

import (
	"errors"
	"reflect"
	"time"
)

// ========== Sources ==========

// JSCKSources is the sources section's configuration key.
const JSCKSources string = "sources"

// JSCSources configures each source of opportunities, one field
// per source. Each field's cfg tag must match the section's JSCK* constant.
type JSCSources struct {
	FindATender JSCSourceFindATender `cfg:"find_a_tender"`
	FTSMock     JSCSourceFTSMock     `cfg:"fts_mock"`
	Sleeper     JSCSourceSleeper     `cfg:"sleeper"`
}

// ---------- Section methods (see Section) ----------

// Map implements Section.
func (c JSCSources) Map() map[string]any { return mapOf(c) }

// Flatten implements Section.
func (c JSCSources) Flatten() map[string]any {
	return flattenOf(JSCKSources, c)
}

// TypeOf implements Section.
func (c JSCSources) TypeOf(key string) (reflect.Kind, error) {
	return typeOf(c, key)
}

// ValueOf implements Section.
func (c JSCSources) ValueOf(key string) (any, error) {
	return valueOf(c, key)
}

// SetValue implements Section.
func (c *JSCSources) SetValue(key string, value any) error {
	return setValue(c, key, value)
}

// ========== Generic source ==========

// JSCSourcesSource holds the settings every source has, and is embedded
// in each source's section. Interval is how often an enabled source fetches;
// it must be greater than 0 (validate rejects 0 or less: a source is turned
// off with Enabled, not with its interval).
type JSCSourcesSource struct {
	Enabled  bool          `cfg:"enabled"`
	Interval time.Duration `cfg:"interval" default:"10m"`
}

// ---------- Section methods (see Section) ----------

// Map implements Section.
func (c JSCSourcesSource) Map() map[string]any { return mapOf(c) }

// Flatten implements Section.
func (c JSCSourcesSource) Flatten() map[string]any {
	return flattenOf("", c)
}

// TypeOf implements Section.
func (c JSCSourcesSource) TypeOf(key string) (reflect.Kind, error) {
	return typeOf(c, key)
}

// ValueOf implements Section.
func (c JSCSourcesSource) ValueOf(key string) (any, error) {
	return valueOf(c, key)
}

// SetValue implements Section.
func (c *JSCSourcesSource) SetValue(key string, value any) error {
	return setValue(c, key, value)
}

// Keys returns the keys directly in the section.
func (c *JSCSourcesSource) Keys() []string { return keysOf(c) }

// validate checks values before they are stored (see validator); it is
// promoted to each source's section. interval must be greater than 0.
func (c *JSCSourcesSource) validate(key string, value any) error {
	if key == "interval" && value.(time.Duration) <= 0 {
		return errors.New(
			"config: interval must be greater than 0; set enabled to false to turn the source off",
		)
	}
	return nil
}